{"pageNumber":"4","pageRowStart":"75","pageSize":"25","recordCount":11370,"records":[{"id":70273452,"text":"70273452 - 2025 - Refining the earthquake history of south-central Alaska through lake records","interactions":[],"lastModifiedDate":"2026-01-14T14:54:33.04117","indexId":"70273452","displayToPublicDate":"2025-08-11T07:47:52","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":14252,"text":"Earth Science Reviews","active":true,"publicationSubtype":{"id":10}},"title":"Refining the earthquake history of south-central Alaska through lake records","docAbstract":"<p><span id=\"_mce_caret\" data-mce-bogus=\"1\" data-mce-type=\"format-caret\"><span>The Alaska–Aleutian subduction zone (AASZ) is one of the world's most seismically active plate boundaries and the source of the 1964 M</span><sub><i>w</i></sub><span>&nbsp;9.2 Great Alaska earthquake–the second largest instrumentally recorded earthquake in the world. Understanding the nature and frequency of such earthquakes is necessary for seismic and tsunami hazard assessment, but instrumental and historical records that span less than 150&nbsp;years are too short to allow a statistically reliable analysis of earthquake recurrence times. This calls for studies of evidence of past earthquakes, extending the earthquake catalog further back in time. Subduction-zone paleoseismology in south-central Alaska is predominantly based on coastal evidence of land-level changes and tsunamis generated by megathrust earthquakes and preserved in the geological record. A complementary approach is lacustrine paleoseismology, which is still a relatively young discipline in Alaska. However, globally, lake basins are well-established high-resolution and continuous recorders of paleoseismic activity along subduction zones, relying on the identification of underwater landslide deposits and turbidites generated by seismic shaking. As a result, lake basins not only register ground shaking from megathrust earthquakes, but also from intraslab and crustal earthquakes, which are typically not accompanied by significant land-level changes. In this review paper, we combine coastal and lacustrine paleoseismology approaches to refine the south-central Alaskan earthquake history by comparing the paleoseismic records from two lakes (i.e., Eklutna Lake, located in the Chugach Mountain Range, and Skilak Lake, situated on the Kenai Peninsula) with the coastal and crustal earthquake catalog in Alaska. The resulting age ranges of all known megathrust earthquakes involving the Alaskan megathrust between the Kodiak and Prince William Sound (PWS) sections are more precise and accurate for the last 1.3 kyrs BP than the previously published age ranges from coastal records. As a result, this study supports the following key conclusions: (1) The 1964 CE earthquake was an exceptionally strong and unique event in the last 2000&nbsp;years, rupturing the PWS, Kenai, Barren Islands, and Kodiak sections simultaneously. (2) The high-resolution and seasonal markings of the varved lake records now disentangle for the first time closely timed earthquakes, which was not possible based on the coastal evidence alone. (3) No persistent megathrust rupture boundaries exist. So, the possibility of a full rupture of the entire eastern AASZ, from PWS to Semidi cannot be excluded. (4) The rupture pattern in the eastern AASZ reveals superimposed cycles of multi-asperity ruptures (1964 earthquake) and clustered complementary partial ruptures, or rupture cascades. (5) The PWS section hosts the largest asperity in the eastern AASZ. (6) The shaking record of megathrust earthquakes indicates a time-dependent (quasiperiodic) behavior for the study area, but the observation of complementary clusters means that the hazards will not drop to zero but instead may even increase for a neighboring section. (7) The time-independent behavior of intraplate earthquakes implies that the intraslab hazard did not decrease following the 2016 and 2018 earthquakes. This study utilizes an integrated approach for subduction zone paleoseismology as a solution for unraveling recurrence and rupture patterns in Alaska, which can be applied worldwide.</span></span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.earscirev.2025.105249","usgsCitation":"Praet, N., Van Daele, M., Wils, K., Haeussler, P., Witter, R.C., McKay, N.P., Jensen, B.J., Moernaut, J., and De Batist, M., 2025, Refining the earthquake history of south-central Alaska through lake records: Earth Science Reviews, v. 271, 105249, 47 p., https://doi.org/10.1016/j.earscirev.2025.105249.","productDescription":"105249, 47 p.","ipdsId":"IP-178908","costCenters":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"links":[{"id":500228,"rank":0,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://doi.org/10.1016/j.earscirev.2025.105249","text":"External Repository"},{"id":498605,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"south-central Alaska","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -158.79411203711422,\n              61.70233462689879\n            ],\n            [\n              -158.79411203711422,\n              56.70329373280984\n            ],\n            [\n              -142.97455757719652,\n              56.70329373280984\n            ],\n            [\n              -142.97455757719652,\n              61.70233462689879\n            ],\n            [\n              -158.79411203711422,\n              61.70233462689879\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"271","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Praet, Nore 0000-0002-5567-3718","orcid":"https://orcid.org/0000-0002-5567-3718","contributorId":365138,"corporation":false,"usgs":false,"family":"Praet","given":"Nore","affiliations":[{"id":87056,"text":"Flanders Marine Institute, Belgium","active":true,"usgs":false}],"preferred":false,"id":953746,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Van Daele, Maarten 0000-0002-8530-4438","orcid":"https://orcid.org/0000-0002-8530-4438","contributorId":194085,"corporation":false,"usgs":false,"family":"Van Daele","given":"Maarten","email":"","affiliations":[{"id":27279,"text":"Department of Geology and Soil Science, Ghent University, Ghent, Belgium","active":true,"usgs":false}],"preferred":false,"id":953747,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wils, Katleen 0000-0003-4738-2002","orcid":"https://orcid.org/0000-0003-4738-2002","contributorId":365139,"corporation":false,"usgs":false,"family":"Wils","given":"Katleen","affiliations":[{"id":87059,"text":"Ghent University, Ghent, Belgium","active":true,"usgs":false}],"preferred":false,"id":953748,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Haeussler, Peter J. 0000-0002-1503-6247","orcid":"https://orcid.org/0000-0002-1503-6247","contributorId":219956,"corporation":false,"usgs":true,"family":"Haeussler","given":"Peter J.","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":953749,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Witter, Robert C. 0000-0002-1721-254X rwitter@usgs.gov","orcid":"https://orcid.org/0000-0002-1721-254X","contributorId":219962,"corporation":false,"usgs":true,"family":"Witter","given":"Robert","email":"rwitter@usgs.gov","middleInitial":"C.","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"preferred":true,"id":953750,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"McKay, Nicholas P. 0000-0003-3598-5113","orcid":"https://orcid.org/0000-0003-3598-5113","contributorId":365140,"corporation":false,"usgs":false,"family":"McKay","given":"Nicholas","middleInitial":"P.","affiliations":[{"id":12698,"text":"Northern Arizona University","active":true,"usgs":false}],"preferred":false,"id":953751,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Jensen, Britta J.L. 0000-0001-9134-7170","orcid":"https://orcid.org/0000-0001-9134-7170","contributorId":244298,"corporation":false,"usgs":false,"family":"Jensen","given":"Britta","email":"","middleInitial":"J.L.","affiliations":[{"id":36696,"text":"University of Alberta","active":true,"usgs":false}],"preferred":false,"id":953752,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Moernaut, Jasper 0000-0003-3164-4274","orcid":"https://orcid.org/0000-0003-3164-4274","contributorId":365141,"corporation":false,"usgs":false,"family":"Moernaut","given":"Jasper","affiliations":[{"id":87060,"text":"University of Innsbruch, Austria","active":true,"usgs":false}],"preferred":false,"id":953753,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"De Batist, Marc 0000-0002-1625-2080","orcid":"https://orcid.org/0000-0002-1625-2080","contributorId":194089,"corporation":false,"usgs":false,"family":"De Batist","given":"Marc","email":"","affiliations":[],"preferred":false,"id":953754,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}}
,{"id":70271932,"text":"70271932 - 2025 - Warming Alaskan rivers affect first-year growth in critical northern food fishes","interactions":[],"lastModifiedDate":"2025-09-24T15:09:37.960929","indexId":"70271932","displayToPublicDate":"2025-08-06T10:05:40","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3358,"text":"Scientific Reports","active":true,"publicationSubtype":{"id":10}},"title":"Warming Alaskan rivers affect first-year growth in critical northern food fishes","docAbstract":"<p><span>Arctic and subarctic rivers are warming rapidly, with unknown consequences for migratory fishes and the human communities dependent on them. To date, few studies have provided a comprehensive assessment of possible climate change impacts on the hydrology and temperature of Arctic rivers at the regional scale, and even fewer have connected those changes to multiple fish species with input and guidance from Indigenous communities. We used climate, hydrologic, and fish-growth simulations of historical (1990–2021) and future (2034–2065) young-of-year (YOY) growth potential of Chinook salmon (</span><i>Oncorhynchus tshawytscha</i><span>) and Dolly Varden (</span><i>Salvelinus malma</i><span>) for seven river basins in the Arctic-Yukon-Kuskokwim (AYK) region of Alaska, USA and Yukon Territory, Canada. Historically, summer water temperatures of all river basins remained below thresholds regarded as deleterious for Chinook salmon (14.6&nbsp;°C) and Dolly Varden (16&nbsp;°C), even in the warmest years. However, by the mid-century, Chinook salmon growth was limited, with declines in the warmest years in most river basins. Conversely, Dolly Varden are expected to benefit, with a near-doubling in growth projections in all river basins. This suggests that there may be an increase in suitable habitat for Dolly Varden by mid-century. The results highlight species-specific consequences of climate change and can guide future research on refugia for these species of cultural and subsistence importance to Indigenous communities in the AYK region and throughout the Arctic.</span></p>","language":"English","publisher":"Nature","doi":"10.1038/s41598-025-14711-8","usgsCitation":"Thomas, P., Blaskey, D., Cheng, Y., Carey, M.P., Swanson, H.K., Newman, A.J., Brooks, C.M., Herman-Mercer, N.M., and Musselman, K.N., 2025, Warming Alaskan rivers affect first-year growth in critical northern food fishes: Scientific Reports, v. 15, 28834, 14 p., https://doi.org/10.1038/s41598-025-14711-8.","productDescription":"28834, 14 p.","ipdsId":"IP-172646","costCenters":[{"id":120,"text":"Alaska Science Center Water","active":true,"usgs":true}],"links":[{"id":496151,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1038/s41598-025-14711-8","text":"Publisher Index Page"},{"id":496010,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"properties\":{},\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-141.0007667541504,69.64681951728146],[-141.064453125,69.80172356231073],[-141.767578125,69.96043926902489],[-142.734375,70.1478274118401],[-143.26171875,70.25945200030638],[-144.99755859375,70.1925497583889],[-146.14013671875,70.21487465331137],[-147.43652343749997,70.32613725493573],[-148.40332031249997,70.51024068514326],[-149.47998046875,70.63448406630856],[-149.85351562499997,70.63448406630856],[-150.64453125,70.59802116106809],[-151.611328125,70.61261423801925],[-151.8310546875,70.7724429742589],[-152.02880859375,70.90226826757711],[-152.666015625,71.0098110139634],[-153.52294921875,71.05979781529196],[-154.31396484375,70.95969716686398],[-154.70947265625,71.20191973293133],[-155.41259765625,71.3219146980122],[-156.46728515625,71.45515260247822],[-157.10449218749997,71.34301347171373],[-157.58789062499997,71.21607526596131],[-157.91748046875,70.99550574822297],[-158.62060546875,70.9883492241249],[-159.30175781249997,70.98119010476937],[-159.98291015625,70.94535555009823],[-160.51025390625,70.73622993891799],[-160.90576171875,70.58341752317065],[-161.5869140625,70.45150843439349],[-161.78466796875,70.45885925640687],[-162.5537109375,70.34092679475283],[-163.05908203125,70.09552886456429],[-163.388671875,69.81689109911446],[-163.564453125,69.51914693717981],[-164.02587890625,69.15474044269264],[-164.90478515625,69.03714171275197],[-165.69580078124997,68.97416358340674],[-166.26708984375,69.01354605132325],[-166.376953125,68.80004113882613],[-166.66259765624997,68.5443150407769],[-167.1240234375,68.39918004344189],[-166.61865234375,68.17155518732503],[-166.5087890625,67.99110834539984],[-165.87158203125,67.8672645403614],[-164.61914062499997,67.47492238478702],[-164.24560546874997,67.23806155909902],[-164.091796875,67.02458758377148],[-163.10302734375,66.87834504307976],[-163.05908203125,66.73990169639414],[-162.66357421875,66.58321725728175],[-162.333984375,66.48697584176404],[-162.3779296875,66.34632215978135],[-163.2568359375,66.31103501145373],[-163.19091796875,66.55700652350038],[-163.76220703124997,66.73990169639414],[-164.46533203125,66.69647781801481],[-165.30029296875,66.55700652350038],[-166.1572265625,66.41674787052298],[-166.9482421875,66.24916310923315],[-167.3876953125,66.01801815922045],[-168.42041015625,65.56754970214311],[-168.02490234375,65.33017791526855],[-167.45361328125,65.18303007291382],[-166.9921875,64.86760781632728],[-166.7724609375,64.49172504435471],[-165.69580078124997,64.24459476798195],[-164.59716796875,64.29229248039543],[-164.13574218749997,64.26368374017731],[-163.49853515625,64.18724867664994],[-162.5537109375,64.27322328178595],[-161.82861328124997,64.24459476798195],[-161.52099609375,63.93737246791484],[-163.125,63.68524808030715],[-163.93798828125,63.41119772365924],[-164.5751953125,63.32254947641308],[-165.41015625,63.15435519659187],[-165.78369140625,62.75472592723178],[-166.26708984375,62.42090322195164],[-166.5966796875,62.155240711732425],[-166.48681640625,61.616843178481375],[-166.2451171875,61.23853141060282],[-165.849609375,60.8663124746226],[-166.5966796875,60.56537850464181],[-167.34375,60.468050120874615],[-167.80517578125,60.20707506634915],[-167.8271484375,60.09771842541544],[-167.89306640624997,59.93300042374631],[-167.03613281249997,59.712097173322924],[-166.640625,59.61221219518693],[-165.95947265624997,59.60109549032134],[-165.47607421874997,59.74532608213611],[-165.10253906249997,59.95501026206206],[-164.794921875,59.987997631212224],[-164.72900390624997,59.7563950493563],[-164.46533203125,59.54545678424146],[-163.8720703125,59.54545678424146],[-163.14697265625,59.60109549032134],[-162.26806640625,59.62332522313024],[-162.20214843749997,59.17592824927136],[-162.35595703125,58.81374171570782],[-162.57568359375,58.6769376725869],[-162.09228515625,58.39019698411526],[-161.455078125,58.39019698411526],[-160.68603515625,58.44773280389084],[-160.1806640625,58.516651799363785],[-159.71923828125,58.58543569119917],[-159.43359375,58.47072082411973],[-159.08203125,58.33256713195789],[-158.55468749999997,58.286395482881034],[-158.44482421874997,58.619777025081675],[-157.60986328125,58.52812515905843],[-158.00537109375,58.00809779306888],[-158.48876953125,57.468589192089354],[-159.49951171875,56.84897198026975],[-161.0595703125,56.389583525613055],[-164.9267578125,54.97761367069628],[-165.9814453125,54.470037612805754],[-168.55224609375,53.73571574532637],[-173.232421875,52.92215137976296],[-175.62744140624997,52.3755991766591],[-177.86865234375,52.13348804077147],[-178.9453125,50.98609893339354],[-178.00048828125,51.440312757160115],[-176.8359375,51.467696956223364],[-175.36376953125,51.7406361640977],[-171.826171875,52.119998657638156],[-167.62939453124997,52.9883372533954],[-166.728515625,53.186287573913305],[-165.9375,53.553362785528094],[-165.30029296875,53.76170183021049],[-164.3115234375,54.149567212540525],[-163.89404296875,54.29088164657006],[-163.3447265625,54.18815548107151],[-162.26806640625,54.07228265560388],[-162.09228515625,54.3549556895541],[-161.89453125,54.7246201949245],[-161.0595703125,54.80068486732233],[-160.400390625,54.67383096593114],[-159.19189453125,54.61025498157912],[-159.14794921875,55.07836723201515],[-158.79638671875,55.429013452407396],[-157.58789062499997,55.825973254619015],[-155.7421875,55.541064956111036],[-154.62158203125,56.01066647040695],[-153.47900390625,56.43820369358165],[-151.45751953125,57.397624055000456],[-151.4794921875,58.07787626787517],[-151.45751953125,58.75680543225761],[-149.74365234374997,59.38917842312835],[-148.51318359375,59.63443457494949],[-146.689453125,59.355596110016315],[-144.51416015625,59.75086102411168],[-144.3109130859375,59.87239799228177],[-143.8330078125,59.968758992382334],[-143.0694580078125,60.031929699115615],[-141.5533447265625,59.842055288480076],[-140.9051513671875,59.68160832698723],[-140.020751953125,59.478568831926395],[-139.1693115234375,59.234986238722],[-138.82873535156247,59.09138238455909],[-138.3233642578125,58.96983560365735],[-138.1146240234375,58.862064179600374],[-138.076171875,58.722598828043374],[-136.9775390625,58.19387126497797],[-136.56005859375,57.7862326105289],[-135.966796875,57.33838126552897],[-136.03271484375,57.052681978717494],[-135.81298828125,56.92099675839107],[-134.571533203125,55.8845546603819],[-134.2034912109375,55.56592203025787],[-133.8958740234375,55.263468250921285],[-133.7530517578125,55.06264118216743],[-133.6102294921875,54.64523407607479],[-133.2421875,54.635697306063854],[-130.6171417236328,54.70637513489091],[-130.62950134277344,54.72422365048395],[-130.62606811523438,54.73651472417763],[-130.65765380859375,54.762274228176494],[-130.62950134277344,54.78247406031503],[-130.5663299560547,54.79237225560392],[-130.49697875976562,54.82877675365454],[-130.42282104492188,54.87423625974835],[-130.34591674804688,54.91569803760518],[-130.27244567871094,54.97288463122321],[-130.18661499023438,55.062247951730015],[-130.18043518066406,55.091729515360875],[-130.15090942382812,55.12393783348962],[-130.14747619628906,55.14160209881279],[-130.10284423828125,55.19219635238084],[-129.97169494628906,55.28146181651345],[-129.97581481933594,55.30022902025666],[-130.02044677734375,55.33890835596374],[-130.0396728515625,55.45043679812318],[-130.0884246826172,55.496749338303694],[-130.12825012207028,55.58144971869657],[-130.10971069335938,55.68223010941079],[-130.14816284179688,55.71473455012689],[-130.15296936035156,55.7649857705176],[-130.12550354003906,55.80475427021683],[-130.0843048095703,55.82134464477078],[-130.00465393066406,55.90573012454021],[-130.00465393066406,55.9130425993163],[-130.0190734863281,55.912657766599715],[-130.00259399414062,56.00605986001467],[-130.10421752929688,56.12297419573329],[-130.24635314941406,56.09693875609652],[-130.3479766845703,56.12794955397159],[-130.42556762695312,56.14134155069025],[-130.4674530029297,56.24373146827144],[-130.55740356445312,56.249454174583384],[-130.5677032470703,56.25479459547735],[-130.62400817871094,56.2685236855868],[-130.78262329101562,56.36715174252849],[-131.08612060546875,56.40668363558357],[-131.16989135742188,56.44883107459549],[-131.473388671875,56.551913918713375],[-131.58119201660156,56.61204220477141],[-131.8352508544922,56.59843662755775],[-131.85997009277344,56.702620872371355],[-131.89979553222656,56.75347577609789],[-131.87232971191406,56.805765643008264],[-132.12432861328122,56.87374615531272],[-132.0467376708984,57.04521234171931],[-132.3687744140625,57.09149987857074],[-132.2472381591797,57.211056900559335],[-132.3680877685547,57.347273783306676],[-132.55210876464844,57.49516565182901],[-132.65853881835938,57.61562391374733],[-132.75466918945312,57.69680911844304],[-132.8693389892578,57.83853792318956],[-133.06983947753906,58.00082136594698],[-133.17283630371094,58.15404059343076],[-133.34518432617188,58.27628739957773],[-133.45985412597656,58.38731772556939],[-133.37608337402344,58.430481925680034],[-133.70567321777344,58.611194853078764],[-133.83956909179685,58.730440812979516],[-134.25979614257812,58.861354043320055],[-134.3360137939453,58.92414471817596],[-134.3140411376953,58.962755708753306],[-134.4060516357422,58.978683427688686],[-134.38133239746094,59.03878841190553],[-134.44656372070312,59.08820785301446],[-134.48501586914062,59.13121539881386],[-134.56329345703125,59.130510792073984],[-134.67933654785156,59.191757369765085],[-134.70130920410156,59.24973478117606],[-134.95742797851562,59.279914277804906],[-135.02883911132812,59.34649517787861],[-134.9897003173828,59.3877798237848],[-135.10093688964844,59.42622028594434],[-135.07827758789062,59.45275367774563],[-135.0274658203125,59.47473269180728],[-135.03021240234375,59.564245132658975],[-135.11810302734372,59.62367244601488],[-135.15586853027344,59.625061301654334],[-135.2190399169922,59.6632323288228],[-135.23345947265625,59.69650975428769],[-135.252685546875,59.69789559656873],[-135.36048889160156,59.73598378851403],[-135.4779052734375,59.79821644465919],[-135.94894409179688,59.6632323288228],[-136.1927032470703,59.63998787256213],[-136.34788513183594,59.60109549032134],[-136.25038146972656,59.56633207991906],[-136.24076843261716,59.55972296971678],[-136.24076843261716,59.52387204745182],[-136.3066864013672,59.46461714320982],[-136.36642456054688,59.4496126517294],[-136.47628784179688,59.46566371970234],[-136.46804809570312,59.28552611855346],[-136.49620056152344,59.27465233689575],[-136.4900207519531,59.26096748461385],[-136.5840911865234,59.166075318301345],[-136.8285369873047,59.16009179641602],[-136.8793487548828,59.13544273484683],[-137.28240966796875,59.0009698708429],[-137.449951171875,58.908900972391415],[-137.52548217773438,58.906418795609426],[-137.5000762939453,58.985760051467075],[-137.54127502441406,59.10478272378236],[-137.60787963867188,59.24376590151355],[-138.62617492675778,59.76746035005358],[-138.66600036621094,59.80961318716828],[-138.6797332763672,59.84481485969105],[-138.70582580566406,59.90650046741583],[-139.05258178710938,59.994179105518434],[-139.19952392578125,60.08950200748712],[-139.0711212158203,60.3187885497516],[-139.07386779785156,60.35243208301854],[-139.69253540039062,60.33544473468298],[-139.97955322265625,60.181818669034776],[-140.4595184326172,60.30858669066228],[-140.5199432373047,60.22003701633967],[-141.00128173828125,60.3058656567224],[-141.0007667541504,69.64681951728146]]]}},{\"type\":\"Feature\",\"properties\":{},\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-173.07586669921875,60.72157115165579],[-173.155517578125,60.69469537287745],[-173.15277099609375,60.64356945377967],[-173.08135986328125,60.61123754937553],[-173.04016113281247,60.58157148491742],[-173.08135986328125,60.53972302275651],[-173.089599609375,60.511343283202464],[-173.05938720703125,60.4788788301667],[-172.98248291015625,60.468050120874615],[-172.94677734374997,60.43689744859958],[-172.8424072265625,60.403001945865476],[-172.78472900390625,60.373144671593685],[-172.7105712890625,60.329667021005825],[-172.6611328125,60.3187885497516],[-172.5897216796875,60.309266913738156],[-172.49908447265625,60.31606836555203],[-172.4139404296875,60.3187885497516],[-172.35076904296875,60.3187885497516],[-172.30682373046872,60.29021531318375],[-172.2381591796875,60.29021531318375],[-172.17498779296875,60.30518536282736],[-172.2381591796875,60.333745513303114],[-172.34527587890625,60.378575303227215],[-172.364501953125,60.40164539086417],[-172.43041992187497,60.40571488624096],[-172.4798583984375,60.39757538658664],[-172.57598876953125,60.41249624776229],[-172.6556396484375,60.43689744859958],[-172.77374267578122,60.4788788301667],[-172.83416748046875,60.50052541051131],[-172.89459228515625,60.550527811064846],[-172.8863525390625,60.588316165776824],[-172.91656494140625,60.62606036274505],[-172.98797607421875,60.658377412327326],[-173.01544189453125,60.69469537287745],[-173.07586669921875,60.72157115165579]]]}},{\"type\":\"Feature\",\"properties\":{},\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-171.650390625,63.809167882566385],[-171.793212890625,63.82128765261384],[-171.80419921875,63.73147780336167],[-171.8426513671875,63.65601144183318],[-171.8865966796875,63.54365806976644],[-171.859130859375,63.42594585479083],[-171.7877197265625,63.34966546248425],[-171.62841796875,63.32501562217765],[-171.474609375,63.28306240110864],[-171.353759765625,63.29540792564745],[-171.2548828125,63.33980806067484],[-171.1395263671875,63.38413977217118],[-171.002197265625,63.389061297647125],[-170.760498046875,63.34966546248425],[-170.57373046875,63.32501562217765],[-170.41992187499997,63.27812271092345],[-170.343017578125,63.1989725264735],[-170.3594970703125,63.156835740093236],[-170.2496337890625,63.156835740093236],[-170.145263671875,63.156835740093236],[-170.0408935546875,63.14194929585152],[-169.9090576171875,63.087300267152735],[-169.8321533203125,63.03753005973634],[-169.7991943359375,62.990169510232555],[-169.8101806640625,62.95522304515911],[-169.74975585937497,62.922735326966595],[-169.617919921875,62.91523303947614],[-169.54650878906247,62.9502272814474],[-169.4915771484375,62.97270150065472],[-169.508056640625,62.99765260346662],[-169.4970703125,63.04251090966805],[-169.43664550781247,63.08978654472616],[-169.34326171874997,63.11712157280328],[-169.178466796875,63.13946747896222],[-169.1070556640625,63.14443090047572],[-168.958740234375,63.104699747121074],[-168.760986328125,63.112153479825004],[-168.67309570312497,63.203925767041305],[-168.662109375,63.26576978358972],[-168.7115478515625,63.3348780927218],[-168.92578125,63.366907787681754],[-169.07958984374997,63.366907787681754],[-169.25537109375,63.37183226679281],[-169.420166015625,63.376755901872734],[-169.5245361328125,63.389061297647125],[-169.6124267578125,63.43331707559086],[-169.705810546875,63.46278300222105],[-169.8211669921875,63.46523712749102],[-169.947509765625,63.48976680530999],[-170.0079345703125,63.59011870211632],[-170.0958251953125,63.658448979940175],[-170.2386474609375,63.704722429433225],[-170.4638671875,63.73390885572919],[-170.5902099609375,63.721751503619956],[-170.7659912109375,63.6779417467744],[-171.2164306640625,63.648697570849286],[-171.474609375,63.6779417467744],[-171.54052734375,63.75334975181205],[-171.650390625,63.809167882566385]]]}},{\"type\":\"Feature\",\"properties\":{},\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-170.40618896484375,57.022794415389725],[-170.3155517578125,57.043718234032625],[-170.22216796875,57.119841130872615],[-170.1947021484375,57.14518072479997],[-170.11505126953125,57.18985535714817],[-170.08209228515625,57.227042992549855],[-170.07110595703125,57.271618718194446],[-170.189208984375,57.23893512461504],[-170.2386474609375,57.22852971878346],[-170.32928466796875,57.22852971878346],[-170.3704833984375,57.22406936030381],[-170.49407958984375,57.20473490715757],[-170.41992187499997,57.12878649751151],[-170.364990234375,57.11387635258491],[-170.42266845703125,57.06910989239133],[-170.46112060546875,57.033257797376066],[-170.40618896484375,57.022794415389725]]]}},{\"type\":\"Feature\",\"properties\":{},\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-169.8321533203125,56.62904228542147],[-169.8211669921875,56.60486209416893],[-169.7991943359375,56.586716786451156],[-169.71405029296875,56.565536245992064],[-169.71405029296875,56.551913918713375],[-169.63165283203125,56.51707901932375],[-169.56024169921875,56.515563731608296],[-169.5025634765625,56.553427752820355],[-169.43115234375,56.58369172128337],[-169.43664550781247,56.626020608371924],[-169.56024169921875,56.63055303322322],[-169.6783447265625,56.62450967912138],[-169.8321533203125,56.62904228542147]]]}}]}","volume":"15","noUsgsAuthors":false,"publicationDate":"2025-08-06","publicationStatus":"PW","contributors":{"authors":[{"text":"Thomas, Peyton","contributorId":361774,"corporation":false,"usgs":false,"family":"Thomas","given":"Peyton","affiliations":[{"id":36621,"text":"University of Colorado","active":true,"usgs":false}],"preferred":false,"id":949417,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Blaskey, Dylan","contributorId":332341,"corporation":false,"usgs":false,"family":"Blaskey","given":"Dylan","email":"","affiliations":[{"id":36627,"text":"University of Colorado, Boulder","active":true,"usgs":false}],"preferred":false,"id":949418,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Cheng, Yifan","contributorId":332342,"corporation":false,"usgs":false,"family":"Cheng","given":"Yifan","email":"","affiliations":[{"id":6648,"text":"National Center for Atmospheric Research","active":true,"usgs":false}],"preferred":false,"id":949419,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Carey, Michael P. 0000-0002-3327-8995 mcarey@usgs.gov","orcid":"https://orcid.org/0000-0002-3327-8995","contributorId":5397,"corporation":false,"usgs":true,"family":"Carey","given":"Michael","email":"mcarey@usgs.gov","middleInitial":"P.","affiliations":[{"id":120,"text":"Alaska Science Center Water","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":949420,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Swanson, Heidi K.","contributorId":203350,"corporation":false,"usgs":false,"family":"Swanson","given":"Heidi","email":"","middleInitial":"K.","affiliations":[{"id":6655,"text":"University of Waterloo","active":true,"usgs":false}],"preferred":false,"id":949421,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Newman, Andrew J.","contributorId":361775,"corporation":false,"usgs":false,"family":"Newman","given":"Andrew","middleInitial":"J.","affiliations":[{"id":6648,"text":"National Center for Atmospheric Research","active":true,"usgs":false}],"preferred":false,"id":949422,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Brooks, Cassandra M.","contributorId":218423,"corporation":false,"usgs":false,"family":"Brooks","given":"Cassandra","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":949423,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Herman-Mercer, Nicole M. 0000-0001-5933-4978 nhmercer@usgs.gov","orcid":"https://orcid.org/0000-0001-5933-4978","contributorId":3927,"corporation":false,"usgs":true,"family":"Herman-Mercer","given":"Nicole","email":"nhmercer@usgs.gov","middleInitial":"M.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":949424,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Musselman, Keith N.","contributorId":361776,"corporation":false,"usgs":false,"family":"Musselman","given":"Keith","middleInitial":"N.","affiliations":[{"id":36621,"text":"University of Colorado","active":true,"usgs":false}],"preferred":false,"id":949425,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}}
,{"id":70269769,"text":"sim3534 - 2025 - Geologic map of the Greater Antilles and Virgin Islands","interactions":[{"subject":{"id":70202933,"text":"ofr20191036 - 2019 - Preliminary geologic map of the Greater Antilles and the Virgin Islands","indexId":"ofr20191036","publicationYear":"2019","noYear":false,"displayTitle":"Preliminary Geologic Map of the Greater Antilles and the Virgin Islands","title":"Preliminary geologic map of the Greater Antilles and the Virgin Islands"},"predicate":"SUPERSEDED_BY","object":{"id":70269769,"text":"sim3534 - 2025 - Geologic map of the Greater Antilles and Virgin Islands","indexId":"sim3534","publicationYear":"2025","noYear":false,"title":"Geologic map of the Greater Antilles and Virgin Islands"},"id":1}],"lastModifiedDate":"2026-02-03T14:47:36.789022","indexId":"sim3534","displayToPublicDate":"2025-08-06T08:15:00","publicationYear":"2025","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":333,"text":"Scientific Investigations Map","code":"SIM","onlineIssn":"2329-132X","printIssn":"2329-1311","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"3534","displayTitle":"Geologic Map of the Greater Antilles and Virgin Islands","title":"Geologic map of the Greater Antilles and Virgin Islands","docAbstract":"<h1>Introduction&nbsp;</h1><p>The geologic map of the Greater Antilles and Virgin Islands is a compilation of information from the literature, integrated to provide a seamless geologic map of the region. This map was prepared to serve as a base map for a mineral resource assessment of the region. Several small-scale regional geologic maps of the region have been prepared in the past. This report supersedes an earlier version of the geologic map of the Greater Antilles and the Virgin Islands that was released as U.S. Geological Survey (USGS) Open-File Report 2019–1036.</p><p>For this report, the regional geologic overview shown on sheet 1 covers Cuba; the island of Hispaniola, which includes Haiti and Dominican Republic; Jamaica; the Cayman Islands; Puerto Rico; and the U.S. and British Virgin Islands. Sheet 2 shows the geology of Cuba and Cayman Islands, sheet 3 the geology of Jamaica, sheet 4 the geology of Hispaniola, and sheet 5 the geology of Puerto Rico and Virgin Islands. Accompanying the maps are three tables: table 1 lists the map units (in alphabetical order by map-unit label), their ages, and the countries or territories in which they can be found. These are listed in alphabetical order for ease in locating unit names from the symbols on the maps. Table 2 is a list of sources for the geologic map compilation of Puerto Rico. Table 3 shows formations in the Devil’s Race Course Group of Jamaica.</p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/sim3534","programNote":"Mineral Resources Program","usgsCitation":"Wilson, F.H., and Labay, K.A., comps., 2025, Geologic map of the Greater Antilles and Virgin Islands: U.S. Geological Survey Scientific Investigations Map 3534, 5 sheets, scales 1:2,500,000, 1:1,000,000, 1:250,000, 1:650,000, 1:300,000, and 1:140,000, 102-p. pamphlet, https://doi.org/10.3133/sim3534. [Supersedes USGS Open-File Report 2019–1036.]","productDescription":"Pamphlet: vi, 102 p.; 5 Sheets: 53.68 x 35.41 inches or smaller; 3 Data Releases","numberOfPages":"102","onlineOnly":"Y","additionalOnlineFiles":"Y","ipdsId":"IP-119640","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":499037,"rank":11,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_118719.htm","linkFileType":{"id":5,"text":"html"}},{"id":493264,"rank":10,"type":{"id":30,"text":"Data Release"},"url":"https://doi.org/10.5066/P1QGKUBG","text":"USGS data release","linkHelpText":"Age determinations from various geochronological methods of rock samples in the Greater Antilles and Virgin Islands"},{"id":493263,"rank":9,"type":{"id":30,"text":"Data Release"},"url":"https://doi.org/10.5066/P1ZN39XQ","text":"USGS data release","linkHelpText":"U-Pb isotopic data and zircon age determinations from the Island of Puerto Rico, United States"},{"id":493262,"rank":8,"type":{"id":30,"text":"Data Release"},"url":"https://doi.org/10.5066/P13X7BHY","text":"USGS data release","linkHelpText":"Data release for the geologic map of the Greater Antilles and Virgin Islands"},{"id":493261,"rank":7,"type":{"id":26,"text":"Sheet"},"url":"https://pubs.usgs.gov/sim/3534/sim3534_sheet5.pdf","text":"Sheet 5","size":"26.4 MB","linkFileType":{"id":1,"text":"pdf"},"description":"SIM 3534 Sheet 5","linkHelpText":"- Geologic Map of Puerto Rico and the Virgin Islands"},{"id":493260,"rank":6,"type":{"id":26,"text":"Sheet"},"url":"https://pubs.usgs.gov/sim/3534/sim3534_sheet4.pdf","text":"Sheet 4","size":"6.11 MB","linkFileType":{"id":1,"text":"pdf"},"description":"SIM 3534 Sheet 4","linkHelpText":"- Geologic Map of Hispaniola"},{"id":493259,"rank":5,"type":{"id":26,"text":"Sheet"},"url":"https://pubs.usgs.gov/sim/3534/sim3534_sheet3.pdf","text":"Sheet 3","size":"1.30 MB","linkFileType":{"id":1,"text":"pdf"},"description":"SIM 3534 Sheet 3","linkHelpText":"- Geologic Map of Jamaica"},{"id":493258,"rank":4,"type":{"id":26,"text":"Sheet"},"url":"https://pubs.usgs.gov/sim/3534/sim3534_sheet2.pdf","text":"Sheet 2","size":"22.8 MB","linkFileType":{"id":1,"text":"pdf"},"description":"SIM 3534 Sheet 2","linkHelpText":"- Geologic Map of Cuba and the Cayman Islands"},{"id":493257,"rank":3,"type":{"id":26,"text":"Sheet"},"url":"https://pubs.usgs.gov/sim/3534/sim3534_sheet1.pdf","text":"Sheet 1","size":"30.4 MB","linkFileType":{"id":1,"text":"pdf"},"description":"SIM 3534 Sheet 1","linkHelpText":"- Geologic Map of the Greater Antilles and Virgin Islands"},{"id":493255,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/sim/3534/coverthb.jpg"},{"id":493256,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/sim/3534/sim3534_pamphlet.pdf","text":"Pamphlet","size":"16.5 MB","linkFileType":{"id":1,"text":"pdf"},"description":"SIM 3534 Pamphlet"}],"country":"Cayman Islands, Cuba, Dominican Republic, Great Britain, Haiti, Jamaica,  United States","otherGeospatial":"Greater Antilles, Virgin Islands","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -85.41689796960137,\n              23.68158826700146\n            ],\n            [\n              -85.41689796960137,\n              16.88696307754377\n            ],\n            [\n              -63.546232446293374,\n              16.88696307754377\n            ],\n            [\n              -63.546232446293374,\n              23.68158826700146\n            ],\n            [\n              -85.41689796960137,\n              23.68158826700146\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","contact":"<p>Center Director, <a href=\"https://www.usgs.gov/centers/alaska-science-center/connect\" data-mce-href=\"https://www.usgs.gov/centers/alaska-science-center/connect\">Alaska Science Center</a><br>U.S. Geological Survey<br>4210 University Dr.<br>Anchorage, AK 99508</p><p><a href=\"../contact\" data-mce-href=\"../contact\">Contact Pubs Warehouse</a></p>","tableOfContents":"<ul><li>Acknowledgments</li><li>Introduction</li><li>Geologic Summary</li><li>Sources of Mapping</li><li>Description of Map Units</li><li>Selected References</li><li>Appendix 1. Terranes of the Greater Antilles and Virgin Islands</li></ul>","publishingServiceCenter":{"id":9,"text":"Reston PSC"},"publishedDate":"2025-08-06","noUsgsAuthors":false,"publicationDate":"2025-08-06","publicationStatus":"PW","contributors":{"compilers":[{"text":"Wilson, Frederic H. 0000-0003-1761-6437 fwilson@usgs.gov","orcid":"https://orcid.org/0000-0003-1761-6437","contributorId":67174,"corporation":false,"usgs":true,"family":"Wilson","given":"Frederic","email":"fwilson@usgs.gov","middleInitial":"H.","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":944587,"contributorType":{"id":3,"text":"Compilers"},"rank":1},{"text":"Labay, Keith A. 0000-0002-6763-3190 klabay@usgs.gov","orcid":"https://orcid.org/0000-0002-6763-3190","contributorId":217714,"corporation":false,"usgs":true,"family":"Labay","given":"Keith","email":"klabay@usgs.gov","middleInitial":"A.","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"preferred":true,"id":944588,"contributorType":{"id":3,"text":"Compilers"},"rank":2}]}}
,{"id":70271997,"text":"70271997 - 2025 - Vibrio pectenicida strain FHCF-3 is a causative agent of sea star wasting disease","interactions":[],"lastModifiedDate":"2025-09-30T15:43:47.684975","indexId":"70271997","displayToPublicDate":"2025-08-04T10:41:01","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":5263,"text":"Nature Ecology & Evolution","active":true,"publicationSubtype":{"id":10}},"displayTitle":"<i>Vibrio pectenicida</i> strain FHCF-3 is a causative agent of sea star wasting disease","title":"Vibrio pectenicida strain FHCF-3 is a causative agent of sea star wasting disease","docAbstract":"<p><span>More than 10 years following the onset of the sea star wasting disease (SSWD) epidemic, affecting over 20 asteroid species from Mexico to Alaska, the causative agent has been elusive. SSWD killed billions of the most susceptible species, sunflower sea stars (</span><i>Pycnopodia helianthoides</i><span>), initiating a trophic cascade involving unchecked urchin population growth and the widespread loss of kelp forests. Identifying the causative agent underpins the development of recovery strategies. Here we induced disease and subsequent mortality in exposure experiments using tissue extracts, coelomic fluid and effluent water from wasting sunflower sea stars, with no mortality in controls. Deep sequencing of diseased sea star coelomic fluid samples from experiments and field outbreaks revealed a dominant proportion of reads assigned to the bacterium&nbsp;</span><i>Vibrio pectenicida</i><span>. Fulfilling Koch’s postulates,&nbsp;</span><i>V. pectenicida</i><span>&nbsp;strain FHCF-3, cultured from the coelomic fluid of a diseased sunflower sea star, caused disease and mortality in exposed sunflower sea stars, demonstrating that it is a causative agent of SSWD. This discovery will enable recovery efforts for sea stars and the ecosystems affected by their decline by facilitating culture-based experimental research and broad-scale screening for pathogen presence and abundance in the laboratory and field.</span></p>","language":"English","publisher":"Nature","doi":"10.1038/s41559-025-02797-2","usgsCitation":"Prentice, M.B., Crandall, G., Chan, A.M., Davis, K.M., Hershberger, P., Finke, J.F., Hodin, J., McCracken, A., Kellogg, C.T., Carvalho, R., Prentice, C., Zhong, K.X., Harvell, D., Suttle, C.A., and Gehman, A.M., 2025, Vibrio pectenicida strain FHCF-3 is a causative agent of sea star wasting disease: Nature Ecology & Evolution, v. 9, p. 1739-1751, https://doi.org/10.1038/s41559-025-02797-2.","productDescription":"13 p.","startPage":"1739","endPage":"1751","ipdsId":"IP-174859","costCenters":[{"id":654,"text":"Western Fisheries Research Center","active":true,"usgs":true}],"links":[{"id":496267,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"9","noUsgsAuthors":false,"publicationDate":"2025-08-04","publicationStatus":"PW","contributors":{"authors":[{"text":"Prentice, Melanie B.","contributorId":361921,"corporation":false,"usgs":false,"family":"Prentice","given":"Melanie","middleInitial":"B.","affiliations":[{"id":86390,"text":"The University of British Columbia, Vancouver, Canada; The Hakai Institute","active":true,"usgs":false}],"preferred":false,"id":949664,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Crandall, Grace","contributorId":361922,"corporation":false,"usgs":false,"family":"Crandall","given":"Grace","affiliations":[{"id":86393,"text":"University of Washington; Seattle, USA.","active":true,"usgs":false}],"preferred":false,"id":949665,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Chan, Amy M.","contributorId":361923,"corporation":false,"usgs":false,"family":"Chan","given":"Amy","middleInitial":"M.","affiliations":[{"id":86394,"text":"The University of British Columbia, Vancouver, Canada","active":true,"usgs":false}],"preferred":false,"id":949666,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Davis, Katherine M.","contributorId":361924,"corporation":false,"usgs":false,"family":"Davis","given":"Katherine","middleInitial":"M.","affiliations":[{"id":86390,"text":"The University of British Columbia, Vancouver, Canada; The Hakai Institute","active":true,"usgs":false}],"preferred":false,"id":949667,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hershberger, Paul 0000-0002-2261-7760","orcid":"https://orcid.org/0000-0002-2261-7760","contributorId":203322,"corporation":false,"usgs":true,"family":"Hershberger","given":"Paul","affiliations":[{"id":654,"text":"Western Fisheries Research Center","active":true,"usgs":true}],"preferred":true,"id":949668,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Finke, Jan F.","contributorId":361925,"corporation":false,"usgs":false,"family":"Finke","given":"Jan","middleInitial":"F.","affiliations":[{"id":86390,"text":"The University of British Columbia, Vancouver, Canada; The Hakai Institute","active":true,"usgs":false}],"preferred":false,"id":949669,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Hodin, Jason","contributorId":295360,"corporation":false,"usgs":false,"family":"Hodin","given":"Jason","email":"","affiliations":[{"id":63853,"text":"Friday Harbor Labs","active":true,"usgs":false}],"preferred":false,"id":949670,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"McCracken, Andrew","contributorId":361926,"corporation":false,"usgs":false,"family":"McCracken","given":"Andrew","affiliations":[{"id":86395,"text":"Department of Biology, University of Vermont; Burlington, USA.","active":true,"usgs":false}],"preferred":false,"id":949671,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Kellogg, Colleen T.","contributorId":361927,"corporation":false,"usgs":false,"family":"Kellogg","given":"Colleen","middleInitial":"T.","affiliations":[{"id":86396,"text":"The Hakai Institute; Campbell River, Canada.","active":true,"usgs":false}],"preferred":false,"id":949672,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Carvalho, Rute","contributorId":361928,"corporation":false,"usgs":false,"family":"Carvalho","given":"Rute","affiliations":[{"id":86396,"text":"The Hakai Institute; Campbell River, Canada.","active":true,"usgs":false}],"preferred":false,"id":949673,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Prentice, Carolyn","contributorId":361929,"corporation":false,"usgs":false,"family":"Prentice","given":"Carolyn","affiliations":[{"id":86396,"text":"The Hakai Institute; Campbell River, Canada.","active":true,"usgs":false}],"preferred":false,"id":949674,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Zhong, Kevin X.","contributorId":361930,"corporation":false,"usgs":false,"family":"Zhong","given":"Kevin","middleInitial":"X.","affiliations":[{"id":86394,"text":"The University of British Columbia, Vancouver, Canada","active":true,"usgs":false}],"preferred":false,"id":949675,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Harvell, Drew","contributorId":149982,"corporation":false,"usgs":false,"family":"Harvell","given":"Drew","email":"","affiliations":[{"id":17869,"text":"Department of Ecology & Evolutionary Biology, Cornell University, Ithaca, NY 14853","active":true,"usgs":false}],"preferred":false,"id":949676,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Suttle, Curtis A.","contributorId":361931,"corporation":false,"usgs":false,"family":"Suttle","given":"Curtis","middleInitial":"A.","affiliations":[{"id":86394,"text":"The University of British Columbia, Vancouver, Canada","active":true,"usgs":false}],"preferred":false,"id":949677,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Gehman, Alyssa-Lois M.","contributorId":361932,"corporation":false,"usgs":false,"family":"Gehman","given":"Alyssa-Lois","middleInitial":"M.","affiliations":[{"id":86390,"text":"The University of British Columbia, Vancouver, Canada; The Hakai Institute","active":true,"usgs":false}],"preferred":false,"id":949678,"contributorType":{"id":1,"text":"Authors"},"rank":15}]}}
,{"id":70273379,"text":"70273379 - 2025 - Late Quaternary environmental change in eastern Beringia","interactions":[],"lastModifiedDate":"2026-01-09T16:24:21.439969","indexId":"70273379","displayToPublicDate":"2025-07-31T10:04:34","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3219,"text":"Quaternary Science Reviews","active":true,"publicationSubtype":{"id":10}},"title":"Late Quaternary environmental change in eastern Beringia","docAbstract":"<div id=\"abspara0010\" class=\"u-margin-s-bottom\">Eastern Beringia (Alaska and western Yukon) is an extensive, high-latitude region of North America that remained largely unglaciated throughout the Quaternary. Consequently, its sedimentary deposits preserve long-term environmental records that have intrigued scientists for nearly a century. Recent advances in palaeoecological proxies and dating methods have proved critical in addressing long-standing questions about regional late Quaternary environmental change. At the same time, they have led to new and sometimes controversial hypotheses. This review covers recent discoveries and unresolved questions focused on the period 57,000–10,000 calendar years before C.E. 1950 (cal yr BP).</div><div id=\"abspara0015\" class=\"u-margin-s-bottom\">The middle Wisconsin interstadial (57,000–30,000&nbsp;cal&nbsp;yr BP) was a period of relative warmth in eastern Beringia, compared with the late Wisconsin (30,000–14,000&nbsp;cal&nbsp;yr BP). Early in the interstadial occasional<span>&nbsp;</span><i>Picea</i><span>&nbsp;</span>woodland was present amongst widespread shrub tundra. Palaeoecological, sedimentary and isotopic data indicate that climate was cooler and drier than the Holocene, with high rates of aeolian activity. Megafauna typically associated with the ‘mammoth steppe’ ecosystem (woolly mammoth [<i>Mammuthus primigenius</i>], horse [<i>Equus</i>] and steppe-bison [<i>Bison priscus</i>]) were present in some abundance.</div><div id=\"abspara0020\" class=\"u-margin-s-bottom\">The transition towards late Wisconsin cold-stage conditions (35,000–30,000&nbsp;cal&nbsp;yr BP) coincided with the establishment of the Bering Land Bridge and featured expansion of spatially varied, herbaceous vegetation, sometimes associated with deep active layers. Sedimentary DNA (<i>seda</i>DNA) and macrofossil evidence show vegetation was not a prairie-like grassland, and the term “steppe-tundra” is a better descriptor. Permafrost pore-ice isotopic (δ<sup>18</sup>O) records suggest a step change in one or more climate drivers ca. 30,000&nbsp;cal&nbsp;yr BP, by which time steppe-tundra was established across eastern Beringia. It remains uncertain whether<span>&nbsp;</span><i>Picea</i><span>&nbsp;</span>survived cold-stage conditions within isolated refugia, or whether it recolonized from south of the Laurentide-Cordilleran ice sheets. Genetic data suggest that<span>&nbsp;</span><i>Picea</i><span>&nbsp;</span>probably survived<span>&nbsp;</span><i>in situ</i>; however, there is no definitive fossil evidence to support this.</div><div id=\"abspara0025\" class=\"u-margin-s-bottom\">The end-Pleistocene transition from steppe-tundra to shrub tundra began ca. 15,000&nbsp;cal&nbsp;yr BP and took place within decades at local scales. The expansion of woody taxa coincided with rising sea levels, reduced sea-ice extent and an abrupt shift in atmospheric circulation that enhanced precipitation. During this time, Earth's orbital configuration caused high early-summer temperatures and strong seasonality, creating growing conditions very different from today. The vegetation consisted of<span>&nbsp;</span><i>Salix</i><span>&nbsp;</span>and<span>&nbsp;</span><i>Betula</i><span>&nbsp;</span>shrub tundra with open areas of herbs and graminoids. During the deglacial warming trend, the Younger Dryas oscillation (12,800–11,700&nbsp;cal&nbsp;yr BP) was variably expressed. It is generally evident in records affected by adjacent oceans but can be absent at sites in continental areas.</div><div id=\"abspara0030\" class=\"u-margin-s-bottom\">These past conditions and paleoenvironmental changes have implications for contemporary issues: hypotheses about Pleistocene mammalian extinction; sensitivity of eastern Beringia to major oceanic reorganizations and high-frequency climate variability; the nature of woody plant expansion with climate warming; grazing, hydroclimate and fire as controls over ecosystems; the efficacy of “Pleistocene rewilding” for carbon capture.</div>","language":"English","publisher":"Elsevier","doi":"10.1016/j.quascirev.2025.109527","usgsCitation":"Monteath, A., Edwards, M., Froese, D., Anderson, L., Gaglioti, B., Cocker, S.L., Brigham-Grette, J., Wooller, M.J., Finney, B., and Abbott, M., 2025, Late Quaternary environmental change in eastern Beringia: Quaternary Science Reviews, v. 368, 109527, 29 p., https://doi.org/10.1016/j.quascirev.2025.109527.","productDescription":"109527, 29 p.","ipdsId":"IP-151578","costCenters":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"links":[{"id":498690,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1016/j.quascirev.2025.109527","text":"Publisher Index Page"},{"id":498509,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Canada, United States","otherGeospatial":"Beringia","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -172.21469331920974,\n              71.5\n            ],\n            [\n              -172.21469331920974,\n              57.43680396544087\n            ],\n            [\n              -134.78471124536657,\n              57.43680396544087\n            ],\n            [\n              -134.78471124536657,\n              71.5\n            ],\n            [\n              -172.21469331920974,\n              71.5\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"368","noUsgsAuthors":false,"publicationDate":"2025-07-31","publicationStatus":"PW","contributors":{"authors":[{"text":"Monteath, Alistair J.","contributorId":347675,"corporation":false,"usgs":false,"family":"Monteath","given":"Alistair J.","affiliations":[{"id":83201,"text":"4Department of Geography and Environment, University of Southampton, Southampton, UK","active":true,"usgs":false}],"preferred":false,"id":953515,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Edwards, Mary E.","contributorId":103490,"corporation":false,"usgs":true,"family":"Edwards","given":"Mary E.","affiliations":[],"preferred":false,"id":953516,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Froese, Duane","contributorId":184165,"corporation":false,"usgs":false,"family":"Froese","given":"Duane","affiliations":[],"preferred":false,"id":953517,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Anderson, Lesleigh 0000-0002-5264-089X","orcid":"https://orcid.org/0000-0002-5264-089X","contributorId":264358,"corporation":false,"usgs":true,"family":"Anderson","given":"Lesleigh","affiliations":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"preferred":true,"id":953518,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Gaglioti, Benjamin V.","contributorId":193129,"corporation":false,"usgs":false,"family":"Gaglioti","given":"Benjamin V.","affiliations":[],"preferred":false,"id":953519,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Cocker, Scott L.","contributorId":364961,"corporation":false,"usgs":false,"family":"Cocker","given":"Scott","middleInitial":"L.","affiliations":[{"id":36696,"text":"University of Alberta","active":true,"usgs":false}],"preferred":false,"id":953520,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Brigham-Grette, Julie","contributorId":364853,"corporation":false,"usgs":false,"family":"Brigham-Grette","given":"Julie","affiliations":[{"id":36396,"text":"University of Massachusetts","active":true,"usgs":false}],"preferred":false,"id":953521,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Wooller, Matthew J.","contributorId":192799,"corporation":false,"usgs":false,"family":"Wooller","given":"Matthew","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":953522,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Finney, Bruce P.","contributorId":88074,"corporation":false,"usgs":true,"family":"Finney","given":"Bruce P.","affiliations":[],"preferred":false,"id":953523,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Abbott, Mark B.","contributorId":267772,"corporation":false,"usgs":false,"family":"Abbott","given":"Mark B.","affiliations":[{"id":12465,"text":"University of Pittsburgh","active":true,"usgs":false}],"preferred":false,"id":953524,"contributorType":{"id":1,"text":"Authors"},"rank":10}]}}
,{"id":70269633,"text":"70269633 - 2025 - Rapid Holocene deposition in the Mackenzie Trough and Barrow Canyon areas in the western Arctic Ocean","interactions":[],"lastModifiedDate":"2025-07-29T15:14:54.039975","indexId":"70269633","displayToPublicDate":"2025-07-28T09:58:13","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":22153,"text":"Progress in Earth and Planetary Science","active":true,"publicationSubtype":{"id":10}},"title":"Rapid Holocene deposition in the Mackenzie Trough and Barrow Canyon areas in the western Arctic Ocean","docAbstract":"<p><span>The Arctic Ocean and terrestrial environment have recently been reported to be changing drastically, but it is unclear whether these changes are similar to natural variations in the past or how sudden and large the changes are compared to natural variations. This premise served as motivation to collect sediment cores during the summer of 2022 at four sites on the Canadian continental shelf and Alaskan upper continental slope to reconstruct changes in the marine and terrestrial environments to provide a comprehensive picture of the ocean environment during the preindustrial period before anthropogenic influences. We dated the sediments based on the&nbsp;</span><sup>137</sup><span>Cs radioactivity of bulk sediments and the&nbsp;</span><sup>14</sup><span>C concentrations of mollusk shells. The&nbsp;</span><sup>137</sup><span>Cs radioactivity shows a distinct onset corresponding to 1950 Common Era (CE) and the most prominent peak corresponding to 1963 CE. Multiple peaks appeared above the most prominent one, coinciding with nuclear power plant accidents in 1986 and 2011. Inventories of excess&nbsp;</span><sup>210</sup><span>Pb in all cores exceed the estimated supply of excess&nbsp;</span><sup>210</sup><span>Pb from atmospheric deposition, likely due to the scavenging supply of excess&nbsp;</span><sup>210</sup><span>Pb. By comparing&nbsp;</span><sup>137</sup><span>Cs and radiocarbon conventional ages, we estimated the local radiocarbon reservoir age value of each site. Using these local radiocarbon reservoir age and the conventional ages of mollusk shell samples, we established the age-depth models by the Bayesian method. The optimal ΔR values were 598, 511, 65, and –60&nbsp;years at the MT1, MT2, BC2, and BC2-2 sites, respectively. The cores consist of clayey silts continuously deposited with uniquely high sedimentation rates of 0.17 to 0.74&nbsp;cm&nbsp;y</span><sup>−1</sup><span>. Variation in the Ca/Ti ratio indicates ~ 20, ~ 30, 50–60, 100–125, and 300-year cycles, likely attributed to the variation in the Aleutian Low that controls the Bering Strait inflow of Pacific waters influencing our core sites. These sediments will be used for further high-resolution, multi-proxy studies with forthcoming results.</span></p>","language":"English","publisher":"Springer","doi":"10.1186/s40645-025-00734-2","usgsCitation":"Yamamoto, M., Suzuki, K., Murayama, M., Gemery, L., Seike, K., Polyak, L., Joe, Y., Uchida, S., Kobayashi, M., Onodera, J., Horikawa, K., Yamamoto, Y., Omori, T., Kuwae, M., Irino, T., Watanabe, Y., Itoh, M., and Watanabe, E., 2025, Rapid Holocene deposition in the Mackenzie Trough and Barrow Canyon areas in the western Arctic Ocean: Progress in Earth and Planetary Science, v. 12, 62, 26 p., https://doi.org/10.1186/s40645-025-00734-2.","productDescription":"62, 26 p.","ipdsId":"IP-174110","costCenters":[{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true}],"links":[{"id":493325,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1186/s40645-025-00734-2","text":"Publisher Index Page"},{"id":493110,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Canada, United States","otherGeospatial":"western Arctic Ocean","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -130,\n              74\n            ],\n            [\n              -170,\n              74\n            ],\n            [\n              -170,\n              64\n            ],\n            [\n              -130,\n              64\n            ],\n            [\n              -130,\n              74\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"12","noUsgsAuthors":false,"publicationDate":"2025-07-28","publicationStatus":"PW","contributors":{"authors":[{"text":"Yamamoto, Masanobu 0000-0003-1312-825X","orcid":"https://orcid.org/0000-0003-1312-825X","contributorId":260119,"corporation":false,"usgs":false,"family":"Yamamoto","given":"Masanobu","email":"","affiliations":[{"id":16855,"text":"Hokkaido University","active":true,"usgs":false}],"preferred":false,"id":944233,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Suzuki, Kenta","contributorId":358830,"corporation":false,"usgs":false,"family":"Suzuki","given":"Kenta","affiliations":[{"id":85686,"text":"Chiba Institute of Technology","active":true,"usgs":false}],"preferred":false,"id":944225,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Murayama, Masafumi","contributorId":358831,"corporation":false,"usgs":false,"family":"Murayama","given":"Masafumi","affiliations":[{"id":85687,"text":"Kochi University","active":true,"usgs":false}],"preferred":false,"id":944227,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Gemery, Laura 0000-0003-1966-8732","orcid":"https://orcid.org/0000-0003-1966-8732","contributorId":245413,"corporation":false,"usgs":true,"family":"Gemery","given":"Laura","affiliations":[{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true}],"preferred":true,"id":944226,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Seike, Koji","contributorId":358832,"corporation":false,"usgs":false,"family":"Seike","given":"Koji","affiliations":[{"id":27746,"text":"Geological Survey of Japan","active":true,"usgs":false}],"preferred":false,"id":944228,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Polyak, Leonid","contributorId":358890,"corporation":false,"usgs":false,"family":"Polyak","given":"Leonid","affiliations":[],"preferred":false,"id":944363,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Joe, Young Jin","contributorId":358891,"corporation":false,"usgs":false,"family":"Joe","given":"Young Jin","affiliations":[],"preferred":false,"id":944364,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Uchida, Shoma","contributorId":358892,"corporation":false,"usgs":false,"family":"Uchida","given":"Shoma","affiliations":[],"preferred":false,"id":944365,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Kobayashi, Minoru","contributorId":358893,"corporation":false,"usgs":false,"family":"Kobayashi","given":"Minoru","affiliations":[],"preferred":false,"id":944366,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Onodera, J.","contributorId":31572,"corporation":false,"usgs":true,"family":"Onodera","given":"J.","email":"","affiliations":[],"preferred":false,"id":944367,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Horikawa, Keiji","contributorId":358894,"corporation":false,"usgs":false,"family":"Horikawa","given":"Keiji","affiliations":[],"preferred":false,"id":944368,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Yamamoto, Yuhji","contributorId":358895,"corporation":false,"usgs":false,"family":"Yamamoto","given":"Yuhji","affiliations":[],"preferred":false,"id":944369,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Omori, Takayuki","contributorId":288123,"corporation":false,"usgs":false,"family":"Omori","given":"Takayuki","email":"","affiliations":[],"preferred":false,"id":944229,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Kuwae, Michinobu","contributorId":340182,"corporation":false,"usgs":false,"family":"Kuwae","given":"Michinobu","email":"","affiliations":[{"id":81497,"text":"Ehime University, Matsuyama, Japan","active":true,"usgs":false}],"preferred":false,"id":944230,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Irino, Tomohisa","contributorId":288122,"corporation":false,"usgs":false,"family":"Irino","given":"Tomohisa","email":"","affiliations":[],"preferred":false,"id":944231,"contributorType":{"id":1,"text":"Authors"},"rank":15},{"text":"Watanabe, Yutaka","contributorId":358833,"corporation":false,"usgs":false,"family":"Watanabe","given":"Yutaka","affiliations":[{"id":16855,"text":"Hokkaido University","active":true,"usgs":false}],"preferred":false,"id":944232,"contributorType":{"id":1,"text":"Authors"},"rank":16},{"text":"Itoh, Motoyo","contributorId":358896,"corporation":false,"usgs":false,"family":"Itoh","given":"Motoyo","affiliations":[],"preferred":false,"id":944370,"contributorType":{"id":1,"text":"Authors"},"rank":17},{"text":"Watanabe, Eiji","contributorId":358897,"corporation":false,"usgs":false,"family":"Watanabe","given":"Eiji","affiliations":[],"preferred":false,"id":944371,"contributorType":{"id":1,"text":"Authors"},"rank":18}]}}
,{"id":70275029,"text":"70275029 - 2025 - Estimating polar bear (Ursus maritimus) age based on an epigenetic DNA methylation clock","interactions":[],"lastModifiedDate":"2026-04-13T14:58:53.110828","indexId":"70275029","displayToPublicDate":"2025-07-28T09:56:01","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1467,"text":"Ecology and Evolution","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Estimating polar bear (<i>Ursus maritimus</i>) age based on an epigenetic DNA methylation clock","title":"Estimating polar bear (Ursus maritimus) age based on an epigenetic DNA methylation clock","docAbstract":"<p><span>Knowledge of animal age is essential to wildlife managers for obtaining meaningful and accurate insights into demographic parameters. A common approach to aging wildlife, including bears (</span><i>Ursus</i><span>&nbsp;spp.), has been extracting a tooth during physical capture and counting the cementum annuli. Limitations to tooth-based aging include questionable accuracy and differing results based on the observer and laboratory. DNA methylation-based epigenetic aging clocks have been developed for many species but not yet for polar bears (</span><i>Ursus maritimus</i><span>). We generated DNA methylation data from whole blood samples (</span><i>n</i><span> = 109) obtained during live capture operations from polar bears of known age in the Chukchi Sea and southern Beaufort Sea subpopulations. We used these samples to calibrate a species-specific epigenetic clock to estimate polar bear chronological age from DNA methylation (DNAm) age. The final polar bear clock was highly accurate (</span><i>r</i><span> = 0.97) with a median absolute error of approximately 9 months. We applied the polar bear clock to 74 blood samples from live-captured polar bears with a cementum annuli-estimated age. Predicted age estimates for these bears ranged from 1.43 to 18.63 years compared to the estimated tooth age range of 3.23–25.27. These epigenetic clocks can be used for polar bear research and management where accurate estimates of age are needed for estimating demographic parameters.</span></p>","language":"English","publisher":"Wiley","doi":"10.1002/ece3.71870","usgsCitation":"Woodruff, S.P., Milciute, M., Gordevicius, J., Brooke, R., and Atwood, T.C., 2025, Estimating polar bear (Ursus maritimus) age based on an epigenetic DNA methylation clock: Ecology and Evolution, v. 15, no. 8, e71870, 10 p., https://doi.org/10.1002/ece3.71870.","productDescription":"e71870, 10 p.","ipdsId":"IP-172796","costCenters":[{"id":65299,"text":"Alaska Science Center Ecosystems","active":true,"usgs":true}],"links":[{"id":502997,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1002/ece3.71870","text":"Publisher Index Page"},{"id":502743,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"15","issue":"8","noUsgsAuthors":false,"publicationDate":"2025-07-28","publicationStatus":"PW","contributors":{"authors":[{"text":"Woodruff, Susannah P.","contributorId":292629,"corporation":false,"usgs":false,"family":"Woodruff","given":"Susannah","email":"","middleInitial":"P.","affiliations":[{"id":36188,"text":"U.S. Fish and Wildlife Service","active":true,"usgs":false}],"preferred":false,"id":959259,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Milciute, Milda","contributorId":369838,"corporation":false,"usgs":false,"family":"Milciute","given":"Milda","affiliations":[{"id":87875,"text":"Clock Foundation","active":true,"usgs":false}],"preferred":false,"id":959260,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gordevicius, Juozas","contributorId":369839,"corporation":false,"usgs":false,"family":"Gordevicius","given":"Juozas","affiliations":[{"id":87875,"text":"Clock Foundation","active":true,"usgs":false}],"preferred":false,"id":959261,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Brooke, Robert","contributorId":369840,"corporation":false,"usgs":false,"family":"Brooke","given":"Robert","affiliations":[{"id":87875,"text":"Clock Foundation","active":true,"usgs":false}],"preferred":false,"id":959262,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Atwood, Todd C. 0000-0002-1971-3110 tatwood@usgs.gov","orcid":"https://orcid.org/0000-0002-1971-3110","contributorId":4368,"corporation":false,"usgs":true,"family":"Atwood","given":"Todd","email":"tatwood@usgs.gov","middleInitial":"C.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":959263,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70269402,"text":"cir1553 - 2025 - The 3D National Topography Model Call for Action—Part 2: The Next Generation 3D Elevation Program","interactions":[],"lastModifiedDate":"2026-02-03T14:31:31.794807","indexId":"cir1553","displayToPublicDate":"2025-07-23T09:15:00","publicationYear":"2025","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":307,"text":"Circular","code":"CIR","onlineIssn":"2330-5703","printIssn":"1067-084X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"1553","displayTitle":"The 3D National Topography Model Call for Action—Part 2: The Next Generation 3D Elevation Program","title":"The 3D National Topography Model Call for Action—Part 2: The Next Generation 3D Elevation Program","docAbstract":"<p>The three-dimensional (3D) National Topography Model initiative to integrate elevation and hydrography data includes the next generation of hydrography data from the 3D Hydrography Program and the next generation of elevation data from the 3D Elevation Program (3DEP). The first-ever collection of light detection and ranging (lidar) data for the nation (IfSAR for Alaska) provides a critical baseline reference, and the addition of multiple repeat elevation mapping projects as part of the next generation of 3DEP would substantially expand analysis capabilities. As the U.S. Geological Survey (USGS) is closing in on our goal of complete coverage with 3DEP data available or in progress for 98.3 percent of the Nation at the end of fiscal year 2024, the USGS is already transitioning to the next generation of 3DEP.</p><p>Based on the 3D Nation Study results and input from a broad range of stakeholders, the USGS National Geospatial Program has finalized a new design for 3DEP that provides increased lidar quality levels and refresh rates. The new program is designed with more flexibility to meet changing user needs and take advantage of improvements in mapping technologies. The program will aim to expand the level of interagency coordination for topobathymetric lidar acquisition for inland rivers. The next generation of 3DEP will also aim to emphasize research, including advancing program design, products, and services and engaging and leveraging the evolving 3D industry. Research goals also include becoming more flexible in meeting user needs and taking advantage of evolving remote-sensing technologies. The program also plans to move from focusing on producing standard products to producing a concept of a 3D Nation Ecosystem with a variety of inputs, products, and services.</p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/cir1553","programNote":"National Geospatial Program","usgsCitation":"Lukas, V., Sugarbaker, L., Thatcher, C., Jason, A., and Stoker, J., 2025, The 3D National Topography Model Call for Action—Part 2: The Next Generation 3D Elevation Program (version 1.1, July 28, 2025): U.S. Geological Survey\nCircular 1553, 18 p., https://doi.org/10.3133/cir1553.","productDescription":"Report: vii, 18 p.; 2 Project Sites","numberOfPages":"18","onlineOnly":"Y","additionalOnlineFiles":"N","ipdsId":"IP-166629","costCenters":[{"id":423,"text":"National Geospatial Program","active":true,"usgs":true}],"links":[{"id":492741,"rank":7,"type":{"id":18,"text":"Project Site"},"url":"https://www.usgs.gov/3d-elevation-program","text":"3D Elevation Program"},{"id":492708,"rank":4,"type":{"id":31,"text":"Publication XML"},"url":"https://pubs.usgs.gov/circ/1553/cir1553.XML","linkFileType":{"id":8,"text":"xml"},"description":"CIR 1553 XML"},{"id":492740,"rank":6,"type":{"id":18,"text":"Project Site"},"url":"https://www.usgs.gov/3dhp","text":"3D Hydrography Program"},{"id":492706,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/circ/1553/cir1553.pdf","text":"Report","size":"1.67 MB","linkFileType":{"id":1,"text":"pdf"},"description":"CIR 1553 PDF"},{"id":492705,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/circ/1553/coverthb2.jpg"},{"id":492707,"rank":3,"type":{"id":39,"text":"HTML Document"},"url":"https://pubs.usgs.gov/publication/cir1553/full","text":"Report","linkFileType":{"id":5,"text":"html"},"description":"CIR 1553 HTML"},{"id":492709,"rank":5,"type":{"id":34,"text":"Image Folder"},"url":"https://pubs.usgs.gov/circ/1553/images/"},{"id":493003,"rank":8,"type":{"id":25,"text":"Version History"},"url":"https://pubs.usgs.gov/circ/1553/versionHist.txt","size":"765 B","linkFileType":{"id":2,"text":"txt"}}],"country":"United States","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -130.67138671875,\n              54.686534234529695\n            ],\n            [\n              -129.9462890625,\n              55.36662484928637\n            ],\n            [\n              -130.1220703125,\n              56.145549500679074\n            ],\n            [\n              -131.9677734375,\n              56.9449741808516\n            ],\n            [\n              -135.3076171875,\n              59.833775202184206\n            ],\n            [\n              -136.38427734375,\n              59.65664225341022\n            ],\n            [\n              -136.6259765625,\n              59.23217626921806\n            ],\n            [\n              -137.52685546875,\n              58.938673187948304\n            ],\n            [\n              -137.65869140625,\n              59.33318942659219\n            ],\n            [\n              -138.8232421875,\n              60.009970961180386\n            ],\n            [\n              -139.21874999999997,\n              60.108670463036\n            ],\n            [\n              -139.04296875,\n              60.403001945865476\n            ],\n            [\n              -139.85595703125,\n              60.337823495982015\n            ],\n            [\n              -140.99853515625,\n              60.337823495982015\n            ],\n            [\n              -141.15234374999997,\n              69.71810669906763\n            ],\n            [\n              -143.4375,\n              70.17020068549206\n            ],\n            [\n              -145.1953125,\n              70.08056215839737\n            ],\n            [\n              -149.765625,\n              70.58341752317065\n            ],\n            [\n              -152.40234375,\n              70.61261423801925\n            ],\n            [\n              -152.314453125,\n              70.95969716686398\n            ],\n            [\n              -157.1484375,\n              71.35706654962706\n            ],\n            [\n              -159.9609375,\n              70.8734913192635\n            ],\n            [\n              -162.0703125,\n              70.31873847853124\n            ],\n            [\n              -163.916015625,\n              69.06856318696033\n            ],\n            [\n              -166.376953125,\n              68.942606818121\n            ],\n            [\n              -166.376953125,\n              68.26938680456564\n            ],\n            [\n              -163.30078125,\n              66.86108230224609\n            ],\n            [\n              -161.982421875,\n              66.47820814385636\n            ],\n            [\n              -163.564453125,\n              66.08936427047088\n            ],\n            [\n              -163.564453125,\n              66.6181218846659\n            ],\n            [\n              -165.76171875,\n              66.40795547978848\n            ],\n            [\n              -168.0908203125,\n              65.69447579373418\n            ],\n            [\n              -166.55273437499997,\n              65.14611484756372\n            ],\n            [\n              -166.904296875,\n              65.05360170595502\n            ],\n            [\n              -166.3330078125,\n              64.41592147626879\n            ],\n            [\n              -162.861328125,\n              64.39693778132846\n            ],\n            [\n              -160.927734375,\n              64.90491004905083\n            ],\n            [\n              -161.0595703125,\n              64.47279382008166\n            ],\n            [\n              -161.4990234375,\n              64.49172504435471\n            ],\n            [\n              -160.8837890625,\n              63.87939001720202\n            ],\n            [\n              -161.1474609375,\n              63.470144746565424\n            ],\n            [\n              -162.6416015625,\n              63.64625919492172\n            ],\n            [\n              -163.212890625,\n              63.05495931065107\n            ],\n            [\n              -164.2236328125,\n              63.37183226679281\n            ],\n            [\n              -166.1572265625,\n              61.75233128411639\n            ],\n            [\n              -165.3662109375,\n              60.54377524118842\n            ],\n            [\n              -167.431640625,\n              60.326947742998414\n            ],\n            [\n              -167.255859375,\n              59.866883195210214\n            ],\n            [\n              -165.8935546875,\n              59.7563950493563\n            ],\n            [\n              -162.68554687499997,\n              59.734253447591364\n            ],\n            [\n              -162.3779296875,\n              60.174306261926034\n            ],\n            [\n              -161.806640625,\n              59.46740794183739\n            ],\n            [\n              -162.0263671875,\n              59.108308258604964\n            ],\n            [\n              -161.806640625,\n              58.768200159239576\n            ],\n            [\n              -162.20214843749997,\n              58.65408464530598\n            ],\n            [\n              -160.83984375,\n              58.44773280389084\n            ],\n            [\n              -159.9609375,\n              58.6769376725869\n            ],\n            [\n              -159.08203125,\n              58.309488840677645\n            ],\n            [\n              -156.88476562499997,\n              58.92733441827545\n            ],\n            [\n              -157.5,\n              58.516651799363785\n            ],\n            [\n              -157.8076171875,\n              57.61010702068388\n            ],\n            [\n              -161.54296875,\n              56.022948079627454\n            ],\n            [\n              -168.6181640625,\n              53.4357192066942\n            ],\n            [\n              -174.9462890625,\n              52.26815737376817\n            ],\n            [\n              -178.2421875,\n              51.83577752045248\n            ],\n            [\n              -173.1884765625,\n              51.590722643120145\n            ],\n            [\n              -162.5537109375,\n              54.23955053156177\n            ],\n            [\n              -155.302734375,\n              55.52863052257191\n            ],\n            [\n              -151.4794921875,\n              57.51582286553883\n            ],\n            [\n              -146.9970703125,\n              60.08676274626006\n            ],\n            [\n              -145.546875,\n              60.21799073323445\n            ],\n            [\n              -144.228515625,\n              59.689926220143356\n            ],\n            [\n              -142.3828125,\n              59.93300042374631\n            ],\n            [\n              -138.3837890625,\n              58.83649009392136\n            ],\n            [\n              -135.6591796875,\n              56.31653672211301\n            ],\n            [\n              -133.2421875,\n              54.521081495443596\n            ],\n            [\n              -130.67138671875,\n              54.686534234529695\n            ]\n          ]\n        ]\n      }\n    },\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -66.796875,\n              44.902577996288876\n            ],\n            [\n              -67.67578124999999,\n              45.583289756006316\n            ],\n            [\n              -67.939453125,\n              47.57652571374621\n            ],\n            [\n              -69.2578125,\n              47.338822694822\n            ],\n            [\n              -71.19140625,\n              45.27488643704891\n            ],\n            [\n              -75.146484375,\n              44.96479793033101\n            ],\n            [\n              -78.046875,\n              43.644025847699496\n            ],\n            [\n              -79.1015625,\n              43.51668853502906\n            ],\n            [\n              -79.1015625,\n              42.87596410238256\n            ],\n            [\n              -82.68310546875,\n              41.65649719441145\n            ],\n            [\n              -83.14453125,\n              42.049292638686836\n            ],\n            [\n              -83.07861328125,\n              42.374778361114195\n            ],\n            [\n              -82.529296875,\n              42.601619944327965\n            ],\n            [\n              -82.24365234375,\n              43.6599240747891\n            ],\n            [\n              -82.41943359375,\n              45.058001435398275\n            ],\n            [\n              -83.60595703125,\n              45.85941212790755\n            ],\n            [\n              -83.49609375,\n              46.027481852486645\n            ],\n            [\n              -83.7158203125,\n              46.164614496897094\n            ],\n            [\n              -83.95751953125,\n              46.07323062540835\n            ],\n            [\n              -84.24316406249999,\n              46.558860303117164\n            ],\n            [\n              -84.72656249999999,\n              46.558860303117164\n            ],\n            [\n              -84.90234375,\n              46.92025531537451\n            ],\n            [\n              -88.41796875,\n              48.3416461723746\n            ],\n            [\n              -89.3408203125,\n              47.96050238891509\n            ],\n            [\n              -90.76904296874999,\n              48.122101028190805\n            ],\n            [\n              -90.87890625,\n              48.22467264956519\n            ],\n            [\n              -91.51611328125,\n              48.10743118848039\n            ],\n            [\n              -92.2412109375,\n              48.37084770238366\n            ],\n            [\n              -92.39501953125,\n              48.23930899024907\n            ],\n            [\n              -92.94433593749999,\n              48.61838518688487\n            ],\n            [\n              -93.44970703125,\n              48.63290858589535\n            ],\n            [\n              -94.7021484375,\n              48.748945343432936\n            ],\n            [\n              -94.833984375,\n              49.23912083246698\n            ],\n            [\n              -95.1416015625,\n              49.396675075193976\n            ],\n            [\n              -95.20751953125,\n              49.009050809382046\n            ],\n            [\n              -123.22265625000001,\n              48.99463598353405\n            ],\n            [\n              -123.0908203125,\n              48.80686346108517\n            ],\n            [\n              -123.24462890625,\n              48.66194284607006\n            ],\n            [\n              -123.1787109375,\n              48.32703913063476\n            ],\n            [\n              -124.78271484375,\n              48.472921272487824\n            ],\n            [\n              -124.93652343749999,\n              48.16608541901253\n            ],\n            [\n              -124.365234375,\n              46.58906908309182\n            ],\n            [\n              -124.541015625,\n              44.15068115978094\n            ],\n            [\n              -124.93652343749999,\n              42.69858589169842\n            ],\n            [\n              -124.541015625,\n              41.22824901518529\n            ],\n            [\n              -124.73876953125,\n              40.43022363450862\n            ],\n            [\n              -124.03564453125,\n              39.35129035526705\n            ],\n            [\n              -124.01367187499999,\n              38.8225909761771\n            ],\n            [\n              -122.05810546875,\n              36.12012758978146\n            ],\n            [\n              -120.95947265624999,\n              34.88593094075317\n            ],\n            [\n              -120.80566406250001,\n              34.08906131584994\n            ],\n            [\n              -118.21289062499999,\n              32.2313896627376\n            ],\n            [\n              -117.22412109375,\n              32.54681317351514\n            ],\n            [\n              -114.78515624999999,\n              32.713355353177555\n            ],\n            [\n              -114.78515624999999,\n              32.491230287947594\n            ],\n            [\n              -110.98388671874999,\n              31.3348710339506\n            ],\n            [\n              -108.21533203125,\n              31.297327991404266\n            ],\n            [\n              -108.2373046875,\n              31.765537409484374\n            ],\n            [\n              -106.435546875,\n              31.765537409484374\n            ],\n            [\n              -104.9853515625,\n              30.600093873550072\n            ],\n            [\n              -104.47998046875,\n              29.592565403314087\n            ],\n            [\n              -103.20556640625,\n              28.94086176940557\n            ],\n            [\n              -102.65625,\n              29.76437737516313\n            ],\n            [\n              -102.3486328125,\n              29.84064389983441\n            ],\n            [\n              -101.49169921875,\n              29.7453016622136\n            ],\n            [\n              -100.83251953125,\n              29.267232865200878\n            ],\n            [\n              -100.30517578125,\n              28.246327971048842\n            ],\n            [\n              -99.60205078124999,\n              27.586197857692664\n            ],\n            [\n              -99.47021484375,\n              27.31321389856826\n            ],\n            [\n              -99.228515625,\n              26.52956523826758\n            ],\n            [\n              -98.2177734375,\n              26.05678288577881\n            ],\n            [\n              -97.75634765625,\n              26.03704188651584\n            ],\n            [\n              -97.44873046875,\n              25.839449402063185\n            ],\n            [\n              -97.20703125,\n              25.93828707492375\n            ],\n            [\n              -96.8994140625,\n              26.194876675795218\n            ],\n            [\n              -96.78955078125,\n              27.858503954841247\n            ],\n            [\n              -93.75732421875,\n              29.420460341013133\n            ],\n            [\n              -90.2197265625,\n              28.998531814051795\n            ],\n            [\n              -88.22021484375,\n              29.05616970274342\n            ],\n            [\n              -87.91259765625,\n              30.14512718337613\n            ],\n            [\n              -86.5283203125,\n              30.183121842195515\n            ],\n            [\n              -85.2978515625,\n              29.49698759653577\n            ],\n            [\n              -84.13330078125,\n              29.80251790576445\n            ],\n            [\n              -82.81494140625,\n              28.555576049185973\n            ],\n            [\n              -83.21044921875,\n              27.800209937418252\n            ],\n            [\n              -82.77099609375,\n              26.941659545381516\n            ],\n            [\n              -82.08984375,\n              25.878994400196202\n            ],\n            [\n              -81.5625,\n              25.264568475331583\n            ],\n            [\n              -82.28759765625,\n              24.467150664739002\n            ],\n            [\n              -82.0458984375,\n              24.046463999666567\n            ],\n            [\n              -80.6396484375,\n              24.56710835257599\n            ],\n            [\n              -79.78271484375,\n              25.34402602913433\n            ],\n            [\n              -79.60693359375,\n              27.27416111737468\n            ],\n            [\n              -80.68359375,\n              30.713503990354965\n            ],\n            [\n              -80.66162109375,\n              31.50362930577303\n            ],\n            [\n              -76.81640625,\n              34.07086232376631\n            ],\n            [\n              -75.16845703124999,\n              35.263561862152095\n            ],\n            [\n              -75.498046875,\n              37.055177106660814\n            ],\n            [\n              -73.58642578125,\n              39.90973623453719\n            ],\n            [\n              -71.3671875,\n              40.84706035607122\n            ],\n            [\n              -69.63134765625,\n              40.9964840143779\n            ],\n            [\n              -70.0048828125,\n              42.342305278572816\n            ],\n            [\n              -70.3564453125,\n              42.89206418807337\n            ],\n            [\n              -67.2802734375,\n              44.37098696297173\n            ],\n            [\n              -67.0166015625,\n              44.69989765840318\n            ],\n            [\n              -66.796875,\n              44.902577996288876\n            ]\n          ]\n        ]\n      }\n    },\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -155.56640625,\n              18.771115062337024\n            ],\n            [\n              -154.68749999999997,\n              19.642587534013032\n            ],\n            [\n              -156.9287109375,\n              21.453068633086783\n            ],\n            [\n              -159.521484375,\n              22.43134015636061\n            ],\n            [\n              -160.5322265625,\n              21.983801417384697\n            ],\n            [\n              -159.9609375,\n              21.207458730482642\n            ],\n            [\n              -158.291015625,\n              20.92039691397189\n            ],\n            [\n              -156.97265625,\n              19.932041306115536\n            ],\n            [\n              -155.9619140625,\n              18.8543103618898\n            ],\n            [\n              -155.56640625,\n              18.771115062337024\n            ]\n          ]\n        ]\n      }\n    },\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -67.060546875,\n              18.020527657852337\n            ],\n            [\n              -66.2255859375,\n              17.916022703877665\n            ],\n            [\n              -65.6103515625,\n              17.97873309555617\n            ],\n            [\n              -65.2587890625,\n              18.124970639386515\n            ],\n            [\n              -65.5224609375,\n              18.458768120015126\n            ],\n            [\n              -66.11572265625,\n              18.542116654448996\n            ],\n            [\n              -66.95068359374999,\n              18.60460138845525\n            ],\n            [\n              -67.34619140625,\n              18.542116654448996\n            ],\n            [\n              -67.2802734375,\n              17.99963161491187\n            ],\n            [\n              -67.060546875,\n              18.020527657852337\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","edition":"Version 1.0: July 23, 2025; Version 1.1: July 28, 2025","contact":"<p>Director, <a href=\"https://www.usgs.gov/programs/national-geospatial-program\" data-mce-href=\"https://www.usgs.gov/programs/national-geospatial-program\">National Geospatial Program</a><br>U.S. Geological Survey<br>Mail Stop 511<br>12201 Sunrise Valley Drive<br>Reston, VA 20192</p><p>Email: <a href=\"mailto:3DEP@usgs.gov\" data-mce-href=\"mailto:3DEP@usgs.gov\">3DEP@usgs.gov</a></p>","tableOfContents":"<ul><li>Foreword</li><li>Abstract</li><li>Introduction</li><li>Next-Generation 3D Elevation Program</li><li>Governance—An Evolving Model</li><li>Next-Generation 3DEP—The Path Ahead</li><li>Summary</li><li>Acknowledgments</li><li>References Cited</li></ul>","publishingServiceCenter":{"id":9,"text":"Reston PSC"},"publishedDate":"2025-07-23","revisedDate":"2025-07-28","noUsgsAuthors":false,"publicationDate":"2025-07-23","publicationStatus":"PW","contributors":{"authors":[{"text":"Lukas, Vicki 0000-0002-3151-6689 vlukas@usgs.gov","orcid":"https://orcid.org/0000-0002-3151-6689","contributorId":2890,"corporation":false,"usgs":true,"family":"Lukas","given":"Vicki","email":"vlukas@usgs.gov","affiliations":[{"id":423,"text":"National Geospatial Program","active":true,"usgs":true}],"preferred":true,"id":943671,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sugarbaker, Larry","contributorId":358408,"corporation":false,"usgs":false,"family":"Sugarbaker","given":"Larry","affiliations":[{"id":85620,"text":"Dewberry","active":true,"usgs":false}],"preferred":false,"id":943672,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Thatcher, Cindy A. 0000-0003-0331-071X","orcid":"https://orcid.org/0000-0003-0331-071X","contributorId":218872,"corporation":false,"usgs":true,"family":"Thatcher","given":"Cindy","email":"","middleInitial":"A.","affiliations":[{"id":423,"text":"National Geospatial Program","active":true,"usgs":true}],"preferred":true,"id":943675,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jason, Allyson L. 0000-0001-5590-3766 ajason@usgs.gov","orcid":"https://orcid.org/0000-0001-5590-3766","contributorId":224300,"corporation":false,"usgs":true,"family":"Jason","given":"Allyson","email":"ajason@usgs.gov","middleInitial":"L.","affiliations":[{"id":423,"text":"National Geospatial Program","active":true,"usgs":true}],"preferred":true,"id":943673,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Stoker, Jason M. 0000-0003-2455-0931 jstoker@usgs.gov","orcid":"https://orcid.org/0000-0003-2455-0931","contributorId":3021,"corporation":false,"usgs":true,"family":"Stoker","given":"Jason","email":"jstoker@usgs.gov","middleInitial":"M.","affiliations":[{"id":423,"text":"National Geospatial Program","active":true,"usgs":true},{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true}],"preferred":true,"id":943674,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70269291,"text":"sir20255056 - 2025 - Selected special conditions affecting peak streamflow and extreme floods in Alaska through water year 2022","interactions":[],"lastModifiedDate":"2026-02-03T14:28:42.124178","indexId":"sir20255056","displayToPublicDate":"2025-07-17T14:22:08","publicationYear":"2025","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":334,"text":"Scientific Investigations Report","code":"SIR","onlineIssn":"2328-0328","printIssn":"2328-031X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2025-5056","displayTitle":"Selected Special Conditions Affecting Peak Streamflow and Extreme Floods in Alaska Through Water Year 2022","title":"Selected special conditions affecting peak streamflow and extreme floods in Alaska through water year 2022","docAbstract":"<p>The U.S. Geological Survey, in cooperation with the Alaska Department of Transportation and Public Facilities, inventoried selected special conditions for annual peak flows and identified extreme floods at streamgages in Alaska through water year 2022 to facilitate hydrologic analysis. Special conditions identified from U.S. Geological Survey gaging records and basin characteristics included regulation and diversion, urbanization, indeterminate drainage areas, drainage areas less than the minimum used in regional analyses, glacial lake outburst floods, other outburst floods, and snowmelt floods. For peak flows that occurred during calendar years 1980–2019, an atmospheric river dataset was used to identify atmospheric river presence or absence on the dates peak flows occurred. Extreme floods (defined as peak flows exceeding the 1-percent annual exceedance probability flood magnitude or an empirical measure of relative magnitude using Creager’s coefficient C) were identified and associated with flood-generating mechanisms using the other inventoried special conditions and other information.</p><p>The gaging record contained glacial lake outburst floods at 15 streamgages and other types of outburst floods at 10 streamgages. Non-outburst peak flows in Alaska resulted from a mixture of rainfall and melt-based flood-generating mechanisms in all but the most rain-dominated seasonal flow regime. Melt-based flood-generating mechanisms included snowmelt, high-elevation snow and ice melt, or rain-on-snow events. Atmospheric rivers were common in Alaska and conterminous basins in Canada, occurring in that region on 67 percent of the days in the calendar year 1980–2019 period. Atmospheric rivers were more common on the days of peak flows and even more common on the days of non-outburst extreme floods. The percentage of days when an atmospheric river was present increased to 78 percent for the days of peak flows in that period and to 83 percent for the days of non-outburst extreme floods in that period. Of 149 extreme floods in the gaging record, 38 were generated by outburst floods. Of the non-outburst extreme floods, 72 percent were generated by rainfall and 26 percent were generated by melt-based processes or a combination of rainfall and melt-based processes. Flood-generating mechanisms could not be determined for the final 2 percent of the non-outburst extreme floods because the month and day of the peak flows were unknown and no other information was available. Secondary factors strongly associated with extreme floods included antecedent rain and streamflow conditions and warm storm conditions that produced rain instead of snow or generated snowmelt.</p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/sir20255056","collaboration":"Prepared in cooperation with Alaska Department of Transportation and Public Facilities","usgsCitation":"Curran, J.H., 2025, Selected special conditions affecting peak streamflow and extreme floods in Alaska through water year 2022: U.S. Geological Survey Scientific Investigations Report 2025–5056, 41 p., https://doi.org/10.3133/sir20255056.","productDescription":"Report: viii, 41 p.; 5 Data Releases","onlineOnly":"Y","ipdsId":"IP-169678","costCenters":[{"id":120,"text":"Alaska Science Center Water","active":true,"usgs":true}],"links":[{"id":499049,"rank":11,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_118692.htm","linkFileType":{"id":5,"text":"html"}},{"id":492464,"rank":10,"type":{"id":31,"text":"Publication XML"},"url":"https://pubs.usgs.gov/sir/2025/5056/sir20255056.XML"},{"id":492462,"rank":8,"type":{"id":30,"text":"Data Release"},"url":"https://doi.org/10.5066/P1C5KFBH","text":"USGS data release","description":"USGS data release","linkHelpText":"Extreme flood, atmospheric river presence, and basin characteristic data for a study of peak streamflow special conditions in Alaska"},{"id":492461,"rank":7,"type":{"id":30,"text":"Data Release"},"url":"https://doi.org/10.5066/P1YZSU8P","text":"USGS data release","description":"USGS data release","linkHelpText":"Summary of selected basin and streamflow special conditions for USGS streamgages in Alaska"},{"id":492460,"rank":6,"type":{"id":30,"text":"Data Release"},"url":"https://doi.org/10.5066/P13TMJUP","text":"USGS data release","description":"USGS data release","linkHelpText":"Selected basin boundaries for USGS streamgages in Alaska through 2019"},{"id":492457,"rank":3,"type":{"id":39,"text":"HTML Document"},"url":"https://pubs.usgs.gov/publication/sir20255056/full"},{"id":492455,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/sir/2025/5056/coverthb.jpg"},{"id":492463,"rank":9,"type":{"id":34,"text":"Image Folder"},"url":"https://pubs.usgs.gov/sir/2025/5056/images"},{"id":492456,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/sir/2025/5056/sir20255056.pdf"},{"id":492458,"rank":4,"type":{"id":30,"text":"Data Release"},"url":"https://doi.org/10.5066/P9N798Z3","text":"USGS data release","description":"USGS data release","linkHelpText":"Selected peak-flow special conditions for USGS streamgages in Alaska (ver. 2.0)"},{"id":492459,"rank":5,"type":{"id":30,"text":"Data Release"},"url":"https://doi.org/10.5066/P143KNEJ","text":"USGS data release","description":"USGS data release","linkHelpText":"Selected basin boundaries for USGS streamgages in Alaska through 2014"}],"country":"United States","state":"Alaska","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"properties\":{},\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-141.0007667541504,69.64681951728146],[-141.064453125,69.80172356231073],[-141.767578125,69.96043926902489],[-142.734375,70.1478274118401],[-143.26171875,70.25945200030638],[-144.99755859375,70.1925497583889],[-146.14013671875,70.21487465331137],[-147.43652343749997,70.32613725493573],[-148.40332031249997,70.51024068514326],[-149.47998046875,70.63448406630856],[-149.85351562499997,70.63448406630856],[-150.64453125,70.59802116106809],[-151.611328125,70.61261423801925],[-151.8310546875,70.7724429742589],[-152.02880859375,70.90226826757711],[-152.666015625,71.0098110139634],[-153.52294921875,71.05979781529196],[-154.31396484375,70.95969716686398],[-154.70947265625,71.20191973293133],[-155.41259765625,71.3219146980122],[-156.46728515625,71.45515260247822],[-157.10449218749997,71.34301347171373],[-157.58789062499997,71.21607526596131],[-157.91748046875,70.99550574822297],[-158.62060546875,70.9883492241249],[-159.30175781249997,70.98119010476937],[-159.98291015625,70.94535555009823],[-160.51025390625,70.73622993891799],[-160.90576171875,70.58341752317065],[-161.5869140625,70.45150843439349],[-161.78466796875,70.45885925640687],[-162.5537109375,70.34092679475283],[-163.05908203125,70.09552886456429],[-163.388671875,69.81689109911446],[-163.564453125,69.51914693717981],[-164.02587890625,69.15474044269264],[-164.90478515625,69.03714171275197],[-165.69580078124997,68.97416358340674],[-166.26708984375,69.01354605132325],[-166.376953125,68.80004113882613],[-166.66259765624997,68.5443150407769],[-167.1240234375,68.39918004344189],[-166.61865234375,68.17155518732503],[-166.5087890625,67.99110834539984],[-165.87158203125,67.8672645403614],[-164.61914062499997,67.47492238478702],[-164.24560546874997,67.23806155909902],[-164.091796875,67.02458758377148],[-163.10302734375,66.87834504307976],[-163.05908203125,66.73990169639414],[-162.66357421875,66.58321725728175],[-162.333984375,66.48697584176404],[-162.3779296875,66.34632215978135],[-163.2568359375,66.31103501145373],[-163.19091796875,66.55700652350038],[-163.76220703124997,66.73990169639414],[-164.46533203125,66.69647781801481],[-165.30029296875,66.55700652350038],[-166.1572265625,66.41674787052298],[-166.9482421875,66.24916310923315],[-167.3876953125,66.01801815922045],[-168.42041015625,65.56754970214311],[-168.02490234375,65.33017791526855],[-167.45361328125,65.18303007291382],[-166.9921875,64.86760781632728],[-166.7724609375,64.49172504435471],[-165.69580078124997,64.24459476798195],[-164.59716796875,64.29229248039543],[-164.13574218749997,64.26368374017731],[-163.49853515625,64.18724867664994],[-162.5537109375,64.27322328178595],[-161.82861328124997,64.24459476798195],[-161.52099609375,63.93737246791484],[-163.125,63.68524808030715],[-163.93798828125,63.41119772365924],[-164.5751953125,63.32254947641308],[-165.41015625,63.15435519659187],[-165.78369140625,62.75472592723178],[-166.26708984375,62.42090322195164],[-166.5966796875,62.155240711732425],[-166.48681640625,61.616843178481375],[-166.2451171875,61.23853141060282],[-165.849609375,60.8663124746226],[-166.5966796875,60.56537850464181],[-167.34375,60.468050120874615],[-167.80517578125,60.20707506634915],[-167.8271484375,60.09771842541544],[-167.89306640624997,59.93300042374631],[-167.03613281249997,59.712097173322924],[-166.640625,59.61221219518693],[-165.95947265624997,59.60109549032134],[-165.47607421874997,59.74532608213611],[-165.10253906249997,59.95501026206206],[-164.794921875,59.987997631212224],[-164.72900390624997,59.7563950493563],[-164.46533203125,59.54545678424146],[-163.8720703125,59.54545678424146],[-163.14697265625,59.60109549032134],[-162.26806640625,59.62332522313024],[-162.20214843749997,59.17592824927136],[-162.35595703125,58.81374171570782],[-162.57568359375,58.6769376725869],[-162.09228515625,58.39019698411526],[-161.455078125,58.39019698411526],[-160.68603515625,58.44773280389084],[-160.1806640625,58.516651799363785],[-159.71923828125,58.58543569119917],[-159.43359375,58.47072082411973],[-159.08203125,58.33256713195789],[-158.55468749999997,58.286395482881034],[-158.44482421874997,58.619777025081675],[-157.60986328125,58.52812515905843],[-158.00537109375,58.00809779306888],[-158.48876953125,57.468589192089354],[-159.49951171875,56.84897198026975],[-161.0595703125,56.389583525613055],[-164.9267578125,54.97761367069628],[-165.9814453125,54.470037612805754],[-168.55224609375,53.73571574532637],[-173.232421875,52.92215137976296],[-175.62744140624997,52.3755991766591],[-177.86865234375,52.13348804077147],[-178.9453125,50.98609893339354],[-178.00048828125,51.440312757160115],[-176.8359375,51.467696956223364],[-175.36376953125,51.7406361640977],[-171.826171875,52.119998657638156],[-167.62939453124997,52.9883372533954],[-166.728515625,53.186287573913305],[-165.9375,53.553362785528094],[-165.30029296875,53.76170183021049],[-164.3115234375,54.149567212540525],[-163.89404296875,54.29088164657006],[-163.3447265625,54.18815548107151],[-162.26806640625,54.07228265560388],[-162.09228515625,54.3549556895541],[-161.89453125,54.7246201949245],[-161.0595703125,54.80068486732233],[-160.400390625,54.67383096593114],[-159.19189453125,54.61025498157912],[-159.14794921875,55.07836723201515],[-158.79638671875,55.429013452407396],[-157.58789062499997,55.825973254619015],[-155.7421875,55.541064956111036],[-154.62158203125,56.01066647040695],[-153.47900390625,56.43820369358165],[-151.45751953125,57.397624055000456],[-151.4794921875,58.07787626787517],[-151.45751953125,58.75680543225761],[-149.74365234374997,59.38917842312835],[-148.51318359375,59.63443457494949],[-146.689453125,59.355596110016315],[-144.51416015625,59.75086102411168],[-144.3109130859375,59.87239799228177],[-143.8330078125,59.968758992382334],[-143.0694580078125,60.031929699115615],[-141.5533447265625,59.842055288480076],[-140.9051513671875,59.68160832698723],[-140.020751953125,59.478568831926395],[-139.1693115234375,59.234986238722],[-138.82873535156247,59.09138238455909],[-138.3233642578125,58.96983560365735],[-138.1146240234375,58.862064179600374],[-138.076171875,58.722598828043374],[-136.9775390625,58.19387126497797],[-136.56005859375,57.7862326105289],[-135.966796875,57.33838126552897],[-136.03271484375,57.052681978717494],[-135.81298828125,56.92099675839107],[-134.571533203125,55.8845546603819],[-134.2034912109375,55.56592203025787],[-133.8958740234375,55.263468250921285],[-133.7530517578125,55.06264118216743],[-133.6102294921875,54.64523407607479],[-133.2421875,54.635697306063854],[-130.6171417236328,54.70637513489091],[-130.62950134277344,54.72422365048395],[-130.62606811523438,54.73651472417763],[-130.65765380859375,54.762274228176494],[-130.62950134277344,54.78247406031503],[-130.5663299560547,54.79237225560392],[-130.49697875976562,54.82877675365454],[-130.42282104492188,54.87423625974835],[-130.34591674804688,54.91569803760518],[-130.27244567871094,54.97288463122321],[-130.18661499023438,55.062247951730015],[-130.18043518066406,55.091729515360875],[-130.15090942382812,55.12393783348962],[-130.14747619628906,55.14160209881279],[-130.10284423828125,55.19219635238084],[-129.97169494628906,55.28146181651345],[-129.97581481933594,55.30022902025666],[-130.02044677734375,55.33890835596374],[-130.0396728515625,55.45043679812318],[-130.0884246826172,55.496749338303694],[-130.12825012207028,55.58144971869657],[-130.10971069335938,55.68223010941079],[-130.14816284179688,55.71473455012689],[-130.15296936035156,55.7649857705176],[-130.12550354003906,55.80475427021683],[-130.0843048095703,55.82134464477078],[-130.00465393066406,55.90573012454021],[-130.00465393066406,55.9130425993163],[-130.0190734863281,55.912657766599715],[-130.00259399414062,56.00605986001467],[-130.10421752929688,56.12297419573329],[-130.24635314941406,56.09693875609652],[-130.3479766845703,56.12794955397159],[-130.42556762695312,56.14134155069025],[-130.4674530029297,56.24373146827144],[-130.55740356445312,56.249454174583384],[-130.5677032470703,56.25479459547735],[-130.62400817871094,56.2685236855868],[-130.78262329101562,56.36715174252849],[-131.08612060546875,56.40668363558357],[-131.16989135742188,56.44883107459549],[-131.473388671875,56.551913918713375],[-131.58119201660156,56.61204220477141],[-131.8352508544922,56.59843662755775],[-131.85997009277344,56.702620872371355],[-131.89979553222656,56.75347577609789],[-131.87232971191406,56.805765643008264],[-132.12432861328122,56.87374615531272],[-132.0467376708984,57.04521234171931],[-132.3687744140625,57.09149987857074],[-132.2472381591797,57.211056900559335],[-132.3680877685547,57.347273783306676],[-132.55210876464844,57.49516565182901],[-132.65853881835938,57.61562391374733],[-132.75466918945312,57.69680911844304],[-132.8693389892578,57.83853792318956],[-133.06983947753906,58.00082136594698],[-133.17283630371094,58.15404059343076],[-133.34518432617188,58.27628739957773],[-133.45985412597656,58.38731772556939],[-133.37608337402344,58.430481925680034],[-133.70567321777344,58.611194853078764],[-133.83956909179685,58.730440812979516],[-134.25979614257812,58.861354043320055],[-134.3360137939453,58.92414471817596],[-134.3140411376953,58.962755708753306],[-134.4060516357422,58.978683427688686],[-134.38133239746094,59.03878841190553],[-134.44656372070312,59.08820785301446],[-134.48501586914062,59.13121539881386],[-134.56329345703125,59.130510792073984],[-134.67933654785156,59.191757369765085],[-134.70130920410156,59.24973478117606],[-134.95742797851562,59.279914277804906],[-135.02883911132812,59.34649517787861],[-134.9897003173828,59.3877798237848],[-135.10093688964844,59.42622028594434],[-135.07827758789062,59.45275367774563],[-135.0274658203125,59.47473269180728],[-135.03021240234375,59.564245132658975],[-135.11810302734372,59.62367244601488],[-135.15586853027344,59.625061301654334],[-135.2190399169922,59.6632323288228],[-135.23345947265625,59.69650975428769],[-135.252685546875,59.69789559656873],[-135.36048889160156,59.73598378851403],[-135.4779052734375,59.79821644465919],[-135.94894409179688,59.6632323288228],[-136.1927032470703,59.63998787256213],[-136.34788513183594,59.60109549032134],[-136.25038146972656,59.56633207991906],[-136.24076843261716,59.55972296971678],[-136.24076843261716,59.52387204745182],[-136.3066864013672,59.46461714320982],[-136.36642456054688,59.4496126517294],[-136.47628784179688,59.46566371970234],[-136.46804809570312,59.28552611855346],[-136.49620056152344,59.27465233689575],[-136.4900207519531,59.26096748461385],[-136.5840911865234,59.166075318301345],[-136.8285369873047,59.16009179641602],[-136.8793487548828,59.13544273484683],[-137.28240966796875,59.0009698708429],[-137.449951171875,58.908900972391415],[-137.52548217773438,58.906418795609426],[-137.5000762939453,58.985760051467075],[-137.54127502441406,59.10478272378236],[-137.60787963867188,59.24376590151355],[-138.62617492675778,59.76746035005358],[-138.66600036621094,59.80961318716828],[-138.6797332763672,59.84481485969105],[-138.70582580566406,59.90650046741583],[-139.05258178710938,59.994179105518434],[-139.19952392578125,60.08950200748712],[-139.0711212158203,60.3187885497516],[-139.07386779785156,60.35243208301854],[-139.69253540039062,60.33544473468298],[-139.97955322265625,60.181818669034776],[-140.4595184326172,60.30858669066228],[-140.5199432373047,60.22003701633967],[-141.00128173828125,60.3058656567224],[-141.0007667541504,69.64681951728146]]]}},{\"type\":\"Feature\",\"properties\":{},\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-173.07586669921875,60.72157115165579],[-173.155517578125,60.69469537287745],[-173.15277099609375,60.64356945377967],[-173.08135986328125,60.61123754937553],[-173.04016113281247,60.58157148491742],[-173.08135986328125,60.53972302275651],[-173.089599609375,60.511343283202464],[-173.05938720703125,60.4788788301667],[-172.98248291015625,60.468050120874615],[-172.94677734374997,60.43689744859958],[-172.8424072265625,60.403001945865476],[-172.78472900390625,60.373144671593685],[-172.7105712890625,60.329667021005825],[-172.6611328125,60.3187885497516],[-172.5897216796875,60.309266913738156],[-172.49908447265625,60.31606836555203],[-172.4139404296875,60.3187885497516],[-172.35076904296875,60.3187885497516],[-172.30682373046872,60.29021531318375],[-172.2381591796875,60.29021531318375],[-172.17498779296875,60.30518536282736],[-172.2381591796875,60.333745513303114],[-172.34527587890625,60.378575303227215],[-172.364501953125,60.40164539086417],[-172.43041992187497,60.40571488624096],[-172.4798583984375,60.39757538658664],[-172.57598876953125,60.41249624776229],[-172.6556396484375,60.43689744859958],[-172.77374267578122,60.4788788301667],[-172.83416748046875,60.50052541051131],[-172.89459228515625,60.550527811064846],[-172.8863525390625,60.588316165776824],[-172.91656494140625,60.62606036274505],[-172.98797607421875,60.658377412327326],[-173.01544189453125,60.69469537287745],[-173.07586669921875,60.72157115165579]]]}},{\"type\":\"Feature\",\"properties\":{},\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-171.650390625,63.809167882566385],[-171.793212890625,63.82128765261384],[-171.80419921875,63.73147780336167],[-171.8426513671875,63.65601144183318],[-171.8865966796875,63.54365806976644],[-171.859130859375,63.42594585479083],[-171.7877197265625,63.34966546248425],[-171.62841796875,63.32501562217765],[-171.474609375,63.28306240110864],[-171.353759765625,63.29540792564745],[-171.2548828125,63.33980806067484],[-171.1395263671875,63.38413977217118],[-171.002197265625,63.389061297647125],[-170.760498046875,63.34966546248425],[-170.57373046875,63.32501562217765],[-170.41992187499997,63.27812271092345],[-170.343017578125,63.1989725264735],[-170.3594970703125,63.156835740093236],[-170.2496337890625,63.156835740093236],[-170.145263671875,63.156835740093236],[-170.0408935546875,63.14194929585152],[-169.9090576171875,63.087300267152735],[-169.8321533203125,63.03753005973634],[-169.7991943359375,62.990169510232555],[-169.8101806640625,62.95522304515911],[-169.74975585937497,62.922735326966595],[-169.617919921875,62.91523303947614],[-169.54650878906247,62.9502272814474],[-169.4915771484375,62.97270150065472],[-169.508056640625,62.99765260346662],[-169.4970703125,63.04251090966805],[-169.43664550781247,63.08978654472616],[-169.34326171874997,63.11712157280328],[-169.178466796875,63.13946747896222],[-169.1070556640625,63.14443090047572],[-168.958740234375,63.104699747121074],[-168.760986328125,63.112153479825004],[-168.67309570312497,63.203925767041305],[-168.662109375,63.26576978358972],[-168.7115478515625,63.3348780927218],[-168.92578125,63.366907787681754],[-169.07958984374997,63.366907787681754],[-169.25537109375,63.37183226679281],[-169.420166015625,63.376755901872734],[-169.5245361328125,63.389061297647125],[-169.6124267578125,63.43331707559086],[-169.705810546875,63.46278300222105],[-169.8211669921875,63.46523712749102],[-169.947509765625,63.48976680530999],[-170.0079345703125,63.59011870211632],[-170.0958251953125,63.658448979940175],[-170.2386474609375,63.704722429433225],[-170.4638671875,63.73390885572919],[-170.5902099609375,63.721751503619956],[-170.7659912109375,63.6779417467744],[-171.2164306640625,63.648697570849286],[-171.474609375,63.6779417467744],[-171.54052734375,63.75334975181205],[-171.650390625,63.809167882566385]]]}},{\"type\":\"Feature\",\"properties\":{},\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-170.40618896484375,57.022794415389725],[-170.3155517578125,57.043718234032625],[-170.22216796875,57.119841130872615],[-170.1947021484375,57.14518072479997],[-170.11505126953125,57.18985535714817],[-170.08209228515625,57.227042992549855],[-170.07110595703125,57.271618718194446],[-170.189208984375,57.23893512461504],[-170.2386474609375,57.22852971878346],[-170.32928466796875,57.22852971878346],[-170.3704833984375,57.22406936030381],[-170.49407958984375,57.20473490715757],[-170.41992187499997,57.12878649751151],[-170.364990234375,57.11387635258491],[-170.42266845703125,57.06910989239133],[-170.46112060546875,57.033257797376066],[-170.40618896484375,57.022794415389725]]]}},{\"type\":\"Feature\",\"properties\":{},\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-169.8321533203125,56.62904228542147],[-169.8211669921875,56.60486209416893],[-169.7991943359375,56.586716786451156],[-169.71405029296875,56.565536245992064],[-169.71405029296875,56.551913918713375],[-169.63165283203125,56.51707901932375],[-169.56024169921875,56.515563731608296],[-169.5025634765625,56.553427752820355],[-169.43115234375,56.58369172128337],[-169.43664550781247,56.626020608371924],[-169.56024169921875,56.63055303322322],[-169.6783447265625,56.62450967912138],[-169.8321533203125,56.62904228542147]]]}}]}","contact":"<p><a href=\"mailto:dc_ak@usgs.gov\" data-mce-href=\"mailto:dc_ak@usgs.gov\">Director</a>, <a href=\"https://www.usgs.gov/centers/asc/\" target=\"_blank\" rel=\"noopener\" data-mce-href=\"https://www.usgs.gov/centers/asc/\">Alaska Science Center</a><br>U.S. Geological Survey<br>4210 University Drive<br>Anchorage, Alaska, 99508</p>","tableOfContents":"<ul><li>Abstract</li><li>Introduction</li><li>Description of Study Area</li><li>Data Collection and Compilation Methods</li><li>Results of Inventories of Special Conditions for Peak Flows</li><li>Results of Assessment of Flood-Generating Mechanisms for Extreme Floods</li><li>Discussion—Applications for Hydrologic Analysis</li><li>Limitations</li><li>Summary</li><li>References Cited</li></ul>","publishedDate":"2025-07-17","noUsgsAuthors":false,"publicationDate":"2025-07-17","publicationStatus":"PW","contributors":{"authors":[{"text":"Curran, Janet H. 0000-0002-3899-6275 jcurran@usgs.gov","orcid":"https://orcid.org/0000-0002-3899-6275","contributorId":690,"corporation":false,"usgs":true,"family":"Curran","given":"Janet","email":"jcurran@usgs.gov","middleInitial":"H.","affiliations":[{"id":120,"text":"Alaska Science Center Water","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":943366,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70271350,"text":"70271350 - 2025 - Constraining snow water equivalent of wet snowpacks in southeast Alaska","interactions":[],"lastModifiedDate":"2025-11-20T17:01:21.899953","indexId":"70271350","displayToPublicDate":"2025-07-14T08:30:22","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":794,"text":"Annals of Glaciology","active":true,"publicationSubtype":{"id":10}},"title":"Constraining snow water equivalent of wet snowpacks in southeast Alaska","docAbstract":"Quantifying snow water equivalent (SWE) with ground-penetrating radar (GPR) in a \nwarming climate is complicated by the incidence and variability of liquid water in snow. Snow \nsurveys conducted during the melt season serve as a valuable analog to conditions under future \nwarming. Here, we determine the variability of wet snowpack properties (relative permittivity \nand density) to quantify their impact on SWE estimates using GPR. We collected spatially \ncontinuous snowpack measurements with 400 MHz GPR in 2012 and 2021 across repeat \ntransects (~150 km each year) along with spring and summer snow depth and density \nmeasurements from snow pits and snow cores. Snow relative permittivity values ranged between \n2.06 – 2.62 in 2012 and 2.11 – 5.11 in 2021, resulting in calculated volumetric liquid water \ncontent (LWC) between 1.7% – 5.7% in 2012 and 2.1% – 16% in 2021. This variability in snow \nrelative permittivity results in SWE uncertainties between 8% – 33%, with more extreme cases\nreaching 13% – 45%. We attribute this uncertainty to spatial and temporal variability in liquid \nwater content when using GPR to estimate SWE. As snowpacks become wetter with rising\natmospheric temperatures, GPR surveys should include in-situ relative permittivity \nmeasurements to reduce depth and SWE interpretation uncertainties.","language":"English","publisher":"Cambridge University Press","doi":"10.1017/aog.2025.10014","usgsCitation":"Mannello, M., Braddock, S., Campbell, S., Erwin, E., Schild, K., and McNeil, C., 2025, Constraining snow water equivalent of wet snowpacks in southeast Alaska: Annals of Glaciology, v. 66, e21, 9 p., https://doi.org/10.1017/aog.2025.10014.","productDescription":"e21, 9 p.","ipdsId":"IP-161022","costCenters":[{"id":120,"text":"Alaska Science Center Water","active":true,"usgs":true}],"links":[{"id":495387,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1017/aog.2025.10014","text":"Publisher Index Page"},{"id":495236,"rank":2,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"southeast Alaska","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -133.667,\n              59\n            ],\n            [\n              -134.667,\n              59\n            ],\n            [\n              -134.667,\n              58.333\n            ],\n            [\n              -133.667,\n              58.333\n            ],\n            [\n              -133.667,\n              59\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"66","noUsgsAuthors":false,"publicationDate":"2025-07-14","publicationStatus":"PW","contributors":{"authors":[{"text":"Mannello, Mikaila","contributorId":361040,"corporation":false,"usgs":false,"family":"Mannello","given":"Mikaila","affiliations":[{"id":86169,"text":"The University of Maine Climate Change Institute","active":true,"usgs":false}],"preferred":false,"id":948165,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Braddock, Scott","contributorId":361041,"corporation":false,"usgs":false,"family":"Braddock","given":"Scott","affiliations":[{"id":86170,"text":"University of Maine System, Earth and Climate Sciences","active":true,"usgs":false}],"preferred":false,"id":948166,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Campbell, Seth","contributorId":255638,"corporation":false,"usgs":false,"family":"Campbell","given":"Seth","affiliations":[{"id":7063,"text":"University of Maine","active":true,"usgs":false}],"preferred":false,"id":948167,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Erwin, Emma","contributorId":361043,"corporation":false,"usgs":false,"family":"Erwin","given":"Emma","affiliations":[{"id":86171,"text":"Climate Change Institute, University of Maine","active":true,"usgs":false}],"preferred":false,"id":948169,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Schild, Kristin","contributorId":361044,"corporation":false,"usgs":false,"family":"Schild","given":"Kristin","affiliations":[{"id":86172,"text":"School of Earth and Climate Science, University of Maine","active":true,"usgs":false}],"preferred":false,"id":948170,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"McNeil, Christopher 0000-0003-4170-0428 cmcneil@usgs.gov","orcid":"https://orcid.org/0000-0003-4170-0428","contributorId":220853,"corporation":false,"usgs":true,"family":"McNeil","given":"Christopher","email":"cmcneil@usgs.gov","affiliations":[{"id":120,"text":"Alaska Science Center Water","active":true,"usgs":true}],"preferred":true,"id":948172,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70271920,"text":"70271920 - 2025 - DNA metabarcoding and video camera collars yield different inferences about the summer diet of an arctic ungulate","interactions":[],"lastModifiedDate":"2025-09-24T15:46:38.131894","indexId":"70271920","displayToPublicDate":"2025-07-12T10:42:39","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1475,"text":"Ecosphere","active":true,"publicationSubtype":{"id":10}},"title":"DNA metabarcoding and video camera collars yield different inferences about the summer diet of an arctic ungulate","docAbstract":"<p><span>The diets of wild ungulates are a foundational component of their ecology, influencing their behavior, body condition, and demography. With changing environmental conditions, there is a significant need to identify important forage items for ungulates, but this has often proved challenging. Declines in several barren-ground caribou herds across the North American Arctic have raised concerns about the influence of climate change on caribou forage conditions. Shifts in plant phenology, biomass, quality, and composition may be influencing caribou diets and subsequently affecting their body condition and demographic rates. Although forage is a primary driver of barren-ground caribou behavior and population dynamics, there is limited recent information about the specific foods they consume, and uncertainty about appropriate methods for identifying those foods. Investigators are increasingly using fecal DNA metabarcoding and video camera collars to assess ungulate diets, but comparative studies of these approaches are lacking. To examine the summer diets of barren-ground caribou, we used both fecal metabarcoding and video camera collars to identify forage used by the Porcupine caribou herd, which spans the Alaska–Yukon border. In 2021, we sampled the diets of adult females by collecting fecal samples and observing collar videos during 4 sampling occasions. We found that caribou consumed very specific forage items, and those items varied markedly across the growing season. Caribou predominantly consumed graminoids and lichens during early summer, and shrubs and forbs later in the season. Metabarcoding and video data provided significantly different estimates of diet for all taxonomic levels we evaluated, and inferences from the two approaches were often disparate. Metabarcoding failed to detect some items frequently consumed in videos, such as lichens, and indicated high use of other items rarely consumed, such as mosses. We found that video data provided greater taxonomic diversity and resolution for vascular plants and lichens, and more closely aligned with past research and biological expectations than data from fecal metabarcoding. Additional research is needed to be able to use these methods to identify the biomass of different forage items consumed.</span></p>","language":"English","publisher":"Ecological Society of America","doi":"10.1002/ecs2.70319","usgsCitation":"Johnson, H.E., Coulombe, G., Adams, L., Arnison, C., Barboza, P., Kienzler, M., Leacock, W., and Suitor, M.J., 2025, DNA metabarcoding and video camera collars yield different inferences about the summer diet of an arctic ungulate: Ecosphere, v. 16, no. 7, e70319, 19 p., https://doi.org/10.1002/ecs2.70319.","productDescription":"e70319, 19 p.","ipdsId":"IP-162922","costCenters":[{"id":65299,"text":"Alaska Science Center Ecosystems","active":true,"usgs":true}],"links":[{"id":496161,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1002/ecs2.70319","text":"Publisher Index Page"},{"id":496019,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Canada, United States","state":"Alaska, Yukon","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -144.7923723105851,\n              70.35287221669569\n            ],\n            [\n              -144.7923723105851,\n              67.05263325896493\n            ],\n            [\n              -135.98153547631983,\n              67.05263325896493\n            ],\n            [\n              -135.98153547631983,\n              70.35287221669569\n            ],\n            [\n              -144.7923723105851,\n              70.35287221669569\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"16","issue":"7","noUsgsAuthors":false,"publicationDate":"2025-07-12","publicationStatus":"PW","contributors":{"authors":[{"text":"Johnson, Heather E. 0000-0001-5392-7676 hejohnson@usgs.gov","orcid":"https://orcid.org/0000-0001-5392-7676","contributorId":205919,"corporation":false,"usgs":true,"family":"Johnson","given":"Heather","email":"hejohnson@usgs.gov","middleInitial":"E.","affiliations":[{"id":382,"text":"Michigan Water Science Center","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":949384,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Coulombe, Gabrielle Lys 0000-0002-6272-9302","orcid":"https://orcid.org/0000-0002-6272-9302","contributorId":350671,"corporation":false,"usgs":true,"family":"Coulombe","given":"Gabrielle Lys","affiliations":[{"id":65299,"text":"Alaska Science Center Ecosystems","active":true,"usgs":true}],"preferred":true,"id":949385,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Adams, Layne G. 0000-0001-6212-2896 ladams@usgs.gov","orcid":"https://orcid.org/0000-0001-6212-2896","contributorId":2776,"corporation":false,"usgs":true,"family":"Adams","given":"Layne G.","email":"ladams@usgs.gov","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":949386,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Arnison, Colleen","contributorId":350672,"corporation":false,"usgs":false,"family":"Arnison","given":"Colleen","affiliations":[],"preferred":false,"id":949387,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Barboza, Perry","contributorId":190361,"corporation":false,"usgs":false,"family":"Barboza","given":"Perry","affiliations":[],"preferred":false,"id":949388,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Kienzler, Martin","contributorId":350675,"corporation":false,"usgs":false,"family":"Kienzler","given":"Martin","affiliations":[],"preferred":false,"id":949389,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Leacock, William","contributorId":192123,"corporation":false,"usgs":false,"family":"Leacock","given":"William","affiliations":[],"preferred":false,"id":949390,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Suitor, Michael J.","contributorId":264206,"corporation":false,"usgs":false,"family":"Suitor","given":"Michael","email":"","middleInitial":"J.","affiliations":[{"id":33063,"text":"Yukon Department of Environment","active":true,"usgs":false}],"preferred":false,"id":949391,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70269347,"text":"70269347 - 2025 - ‘The fish that stop’: Drivers of historical decline for Pacific cod and implications for modern management in an era of rapidly changing climate","interactions":[],"lastModifiedDate":"2025-07-18T14:46:47.135868","indexId":"70269347","displayToPublicDate":"2025-07-10T09:42:31","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3048,"text":"Philosophical Transactions of the Royal Society B: Biological Sciences","active":true,"publicationSubtype":{"id":10}},"title":"‘The fish that stop’: Drivers of historical decline for Pacific cod and implications for modern management in an era of rapidly changing climate","docAbstract":"<p><span>n the Gulf of Alaska, a series of marine heat waves depleted Pacific cod (</span><i>Gadus macrocephalus</i><span>) biomass to the lowest abundance ever recorded and led to the fishery’s closure in 2020. Although the fishery has been productive for decades, this collapse may have historical precedents. Traditional knowledge holders refer to cod as ‘the fish that stop’, and there is a suggested period of decline in the 1930s. Here we conduct a catch reconstruction of the early commercial fishery (1864–1950), confirming a rapid catch decline in the 1920s and 1930s. Next, we evaluate evidence for possible drivers. We document changes to demand and technology that contributed to declining catch. However, we also find both qualitative and quantitative evidence of depletion, suggesting catch declines were not driven entirely by social factors. Overfishing may have contributed to localized catch declines as evidenced by declining catch rates in heavily fished localities. We also find evidence for climate as a driver of regional decline, with the period of catch decline characterized by up to 2°C higher temperatures as compared to the earlier period of high fisheries production. Our analysis underscores the importance of understanding long-term drivers of fisheries productivity and the value of linking fisheries and climate histories.</span></p>","language":"English","publisher":"The Royal Society Publishing","doi":"10.1098/rstb.2024.0278","usgsCitation":"McClenachan, L., Anderson, B., Addison, J.A., Barbeaux, S.J., Moore, K., Muir, K., Reedy, K., Spies, I.B., and West, C., 2025, ‘The fish that stop’: Drivers of historical decline for Pacific cod and implications for modern management in an era of rapidly changing climate: Philosophical Transactions of the Royal Society B: Biological Sciences, v. 380, no. 1930, 20240278, 11 p., https://doi.org/10.1098/rstb.2024.0278.","productDescription":"20240278, 11 p.","ipdsId":"IP-168376","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":492865,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1098/rstb.2024.0278","text":"Publisher Index Page"},{"id":492537,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Gulf of Alaska","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -171.36734807808014,\n              60.34356991409652\n            ],\n            [\n              -171.36734807808014,\n              49.72417629774134\n            ],\n            [\n              -133.3953187776795,\n              49.72417629774134\n            ],\n            [\n              -133.3953187776795,\n              60.34356991409652\n            ],\n            [\n              -171.36734807808014,\n              60.34356991409652\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"380","issue":"1930","noUsgsAuthors":false,"publicationDate":"2025-07-10","publicationStatus":"PW","contributors":{"authors":[{"text":"McClenachan, Loren","contributorId":260606,"corporation":false,"usgs":false,"family":"McClenachan","given":"Loren","email":"","affiliations":[{"id":51887,"text":"Colby College","active":true,"usgs":false}],"preferred":false,"id":943491,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Anderson, Bruce T. 0000-0001-7006-5967","orcid":"https://orcid.org/0000-0001-7006-5967","contributorId":345835,"corporation":false,"usgs":false,"family":"Anderson","given":"Bruce T.","affiliations":[{"id":13570,"text":"Boston University","active":true,"usgs":false}],"preferred":false,"id":943492,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Addison, Jason A. 0000-0003-2416-9743 jaddison@usgs.gov","orcid":"https://orcid.org/0000-0003-2416-9743","contributorId":4192,"corporation":false,"usgs":true,"family":"Addison","given":"Jason","email":"jaddison@usgs.gov","middleInitial":"A.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":943493,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Barbeaux, Steven J.","contributorId":256680,"corporation":false,"usgs":false,"family":"Barbeaux","given":"Steven","email":"","middleInitial":"J.","affiliations":[{"id":34572,"text":"NOAA, National Marine Fisheries Service, Alaska Fisheries Science Center","active":true,"usgs":false}],"preferred":false,"id":943494,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Moore, Karoline","contributorId":345836,"corporation":false,"usgs":false,"family":"Moore","given":"Karoline","affiliations":[{"id":82724,"text":"University of Victoria (Canada)","active":true,"usgs":false}],"preferred":false,"id":943495,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Muir, Kai","contributorId":345837,"corporation":false,"usgs":false,"family":"Muir","given":"Kai","affiliations":[{"id":82724,"text":"University of Victoria (Canada)","active":true,"usgs":false}],"preferred":false,"id":943496,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Reedy, Katherine L.","contributorId":345838,"corporation":false,"usgs":false,"family":"Reedy","given":"Katherine L.","affiliations":[{"id":38154,"text":"Idaho State University","active":true,"usgs":false}],"preferred":false,"id":943497,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Spies, Ingrid B.","contributorId":256688,"corporation":false,"usgs":false,"family":"Spies","given":"Ingrid","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":943498,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"West, Catherine F. 0000-0001-5177-9235","orcid":"https://orcid.org/0000-0001-5177-9235","contributorId":345839,"corporation":false,"usgs":false,"family":"West","given":"Catherine F.","affiliations":[{"id":13570,"text":"Boston University","active":true,"usgs":false}],"preferred":false,"id":943499,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}}
,{"id":70273845,"text":"70273845 - 2025 - Cryptic ice wedge networks in Holocene peat, Yukon-Kuskokwim Delta, Alaska","interactions":[],"lastModifiedDate":"2026-02-06T14:57:41.937702","indexId":"70273845","displayToPublicDate":"2025-07-06T07:44:37","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3032,"text":"Permafrost and Periglacial Processes","active":true,"publicationSubtype":{"id":10}},"title":"Cryptic ice wedge networks in Holocene peat, Yukon-Kuskokwim Delta, Alaska","docAbstract":"<p><span id=\"_mce_caret\" data-mce-bogus=\"1\" data-mce-type=\"format-caret\"><span>The Yukon-Kuskokwim Delta (YKD), covering ~75,000 km</span><sup>2</sup><span>&nbsp;of Alaska's discontinuous permafrost zone, has a historic (1902–2023) mean annual air temperature of ~−1°C and was previously thought to lack ice wedge networks. However, our recent investigations near Bethel, Alaska, revealed numerous near-surface ice wedges. Using 20 cm resolution aerial orthoimagery from 2018, we identified ~50 linear km of ice wedge troughs in a 60 km</span><sup>2</sup><span>&nbsp;study area. Fieldwork in 2023 and 2024 confirmed ice wedges up to ~1.5 m wide and ~2.5 m in vertical extent, situated on average 0.9 m below the tundra surface (</span><i>n</i><span> = 29). Ground-penetrating radar (GPR) detected additional ice wedges beyond those visible in the remote sensing imagery, suggesting an underestimation of their true abundance. Coring of polygonal centers revealed late-Quaternary deposits, including thick early Holocene peat, late-Pleistocene ice-rich silts (reworked Yedoma), charcoal layers from tundra fires, and the Aniakchak CFE II tephra (~3600 cal yrs BP). Stable water isotopes from Bethel's wedge ice (mean δ</span><sup>18</sup><span>O = −15.7 ‰, δ</span><sup>2</sup><span>H = −113.1 ‰) indicate a relatively enriched signature compared to other Holocene ice wedges in Alaska, likely due to warmer temperatures and maritime influences. Expanding our mapping across the YKD using high-resolution satellite imagery from 2012 to 2024, we estimate that the Holocene ice wedge zone encompasses ~30% of the YKD tundra region. Our findings demonstrate that ice wedge networks are more widespread across the YKD than previously recognized, emphasizing both the resilience and vulnerability of the region's warm, ice-rich permafrost. These insights are crucial for understanding permafrost responses to climate change and assessing agricultural potential and development in the region.</span></span></p>","language":"English","publisher":"Wiley","doi":"10.1002/ppp.70004","usgsCitation":"Jones, B.M., Kanevskiy, M.Z., Ward Jones, M.K., Wilson, P.R., Ditmer, I., Gaglioti, B.V., Klein, E.S., Rangel, R.C., Wallace, K.L., Jones, M.C., Wooller, M.J., and Shur, Y., 2025, Cryptic ice wedge networks in Holocene peat, Yukon-Kuskokwim Delta, Alaska: Permafrost and Periglacial Processes, v. 36, no. 4, p. 678-701, https://doi.org/10.1002/ppp.70004.","productDescription":"24 p.","startPage":"678","endPage":"701","ipdsId":"IP-175795","costCenters":[{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true}],"links":[{"id":499646,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Yukon-Kuskokwim Delta","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -166.71195756659301,\n              62.38230528877912\n            ],\n            [\n              -165.04644344980764,\n              59.62218401712238\n            ],\n            [\n              -162.45472575741837,\n              59.79087749417303\n            ],\n            [\n              -162.00330706010726,\n              60.533926260260756\n            ],\n            [\n              -160.51708345158914,\n              61.33023780667287\n            ],\n            [\n              -160.7416619918443,\n              62.8695929592551\n            ],\n            [\n              -163.86413500040837,\n              63.5238399612943\n            ],\n            [\n              -166.71195756659301,\n              62.38230528877912\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"36","issue":"4","noUsgsAuthors":false,"publicationDate":"2025-07-06","publicationStatus":"PW","contributors":{"authors":[{"text":"Jones, Benjamin M.","contributorId":366063,"corporation":false,"usgs":false,"family":"Jones","given":"Benjamin","middleInitial":"M.","affiliations":[{"id":6695,"text":"UAF","active":true,"usgs":false}],"preferred":false,"id":955215,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kanevskiy, Mikhail Z.","contributorId":366064,"corporation":false,"usgs":false,"family":"Kanevskiy","given":"Mikhail","middleInitial":"Z.","affiliations":[{"id":6695,"text":"UAF","active":true,"usgs":false}],"preferred":false,"id":955216,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ward Jones, Melissa K.","contributorId":366065,"corporation":false,"usgs":false,"family":"Ward Jones","given":"Melissa","middleInitial":"K.","affiliations":[{"id":6695,"text":"UAF","active":true,"usgs":false}],"preferred":false,"id":955217,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Wilson, Phillip R.","contributorId":366066,"corporation":false,"usgs":false,"family":"Wilson","given":"Phillip","middleInitial":"R.","affiliations":[{"id":6695,"text":"UAF","active":true,"usgs":false}],"preferred":false,"id":955218,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ditmer, Isaiah","contributorId":366068,"corporation":false,"usgs":false,"family":"Ditmer","given":"Isaiah","affiliations":[{"id":6695,"text":"UAF","active":true,"usgs":false}],"preferred":false,"id":955219,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Gaglioti, Benjamin V.","contributorId":366069,"corporation":false,"usgs":false,"family":"Gaglioti","given":"Benjamin","middleInitial":"V.","affiliations":[{"id":6695,"text":"UAF","active":true,"usgs":false}],"preferred":false,"id":955220,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Klein, Eric S.","contributorId":366071,"corporation":false,"usgs":false,"family":"Klein","given":"Eric","middleInitial":"S.","affiliations":[{"id":82717,"text":"UAA","active":true,"usgs":false}],"preferred":false,"id":955221,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Rangel, Rodrigo C.","contributorId":366073,"corporation":false,"usgs":false,"family":"Rangel","given":"Rodrigo","middleInitial":"C.","affiliations":[{"id":7044,"text":"University of Toronto","active":true,"usgs":false}],"preferred":false,"id":955222,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Wallace, Kristi L. 0000-0002-0962-048X kwallace@usgs.gov","orcid":"https://orcid.org/0000-0002-0962-048X","contributorId":3454,"corporation":false,"usgs":true,"family":"Wallace","given":"Kristi","email":"kwallace@usgs.gov","middleInitial":"L.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":955223,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Jones, Miriam C. 0000-0002-6650-7619","orcid":"https://orcid.org/0000-0002-6650-7619","contributorId":257239,"corporation":false,"usgs":true,"family":"Jones","given":"Miriam","email":"","middleInitial":"C.","affiliations":[{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true}],"preferred":true,"id":955224,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Wooller, Matthew J.","contributorId":345664,"corporation":false,"usgs":false,"family":"Wooller","given":"Matthew","middleInitial":"J.","affiliations":[{"id":82686,"text":"College of Fisheries and Ocean Sciences, Institute of Marine Science, University of Alaska, Fairbanks, AK 99775, USA.","active":true,"usgs":false}],"preferred":false,"id":955225,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Shur, Yuri","contributorId":169367,"corporation":false,"usgs":false,"family":"Shur","given":"Yuri","email":"","affiliations":[{"id":7211,"text":"University of Alaska, Fairbanks","active":true,"usgs":false}],"preferred":false,"id":955226,"contributorType":{"id":1,"text":"Authors"},"rank":12}]}}
,{"id":70268864,"text":"70268864 - 2025 - Identifying presence or absence of grizzly and polar bear cubs from the movements of adult females with machine learning","interactions":[],"lastModifiedDate":"2025-07-09T15:32:38.339545","indexId":"70268864","displayToPublicDate":"2025-07-04T10:24:18","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2792,"text":"Movement Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Identifying presence or absence of grizzly and polar bear cubs from the movements of adult females with machine learning","docAbstract":"<h3 class=\"c-article__sub-heading\" data-test=\"abstract-sub-heading\">Background</h3><p>Information on reproductive success is crucial to understanding population dynamics but can be difficult to obtain, particularly for species that birth while denning. For grizzly (<i>Ursus arctos</i>) and polar bears (<i>U. maritimus</i>), den visits are impractical because of safety and logistical considerations. Reproduction is typically documented through direct observation, which can be difficult, costly, and often occurs long after den departure. Reproduction could be documented remotely, however, from post-denning movement data if discernable differences exist between females with and without cubs.</p><h3 class=\"c-article__sub-heading\" data-test=\"abstract-sub-heading\">Methods</h3><p>We trained support vector machines (SVMs) with eight variables derived from telemetry data of female grizzly (2000–2022) and polar bears (1985–2016) with or without cubs during seven periods with lengths ranging from 5 to 60 days starting at den departure. We assessed SVM classification accuracy by withholding two samples (one cub-present, one cub-absent), training SVMs with the remaining data, predicting classification of the withheld samples, and repeating this process for each sample combination. Additionally, we evaluated how classification accuracy for grizzly bears was influenced by sample size, length of the post-departure period, and frequency of standardized location estimates.</p><h3 class=\"c-article__sub-heading\" data-test=\"abstract-sub-heading\">Results</h3><p>Accuracy of predicting cub presence or absence was 87% for grizzly bears with only 5 days of post-departure data and increased to a maximum of 92% with 20 days of data. For polar bears, accuracy was 86% at 5 days post-departure and increased to a maximum of 93% at 50 days. Classification accuracy for grizzly bears increased from 76 to 90% when sample size increased from 10 to 30 bears while holding period length constant (30 days) but did not increase at larger sample sizes. When sample size was held constant, increasing the length of the post-departure period did not affect classification accuracy markedly.</p><h3 class=\"c-article__sub-heading\" data-test=\"abstract-sub-heading\">Conclusion</h3><p>Presence or absence of grizzly and polar bear cubs can be identified with high accuracy even when SVM models are trained with limited data. Detecting cub presence or absence remotely could improve estimates of reproductive success and litter survival, enhancing our understanding of factors affecting cub recruitment.</p>","language":"English","publisher":"Springer Nature","doi":"10.1186/s40462-025-00577-y","usgsCitation":"Andersen, E., Clapp, J., Vinks, M., Atwood, T.C., Bjornlie, D., Costello, C., Gustine, D., Haroldson, M.A., Roberts, L.L., Rode, K.D., van Manen, F.T., and Wilson, R.H., 2025, Identifying presence or absence of grizzly and polar bear cubs from the movements of adult females with machine learning: Movement Ecology, v. 13, 48, 13 p., https://doi.org/10.1186/s40462-025-00577-y.","productDescription":"48, 13 p.","ipdsId":"IP-171094","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"links":[{"id":492088,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1186/s40462-025-00577-y","text":"Publisher Index Page"},{"id":491905,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska, Idaho, Montana, Wyoming","otherGeospatial":"Beaufort Sea, Chukchi Sea, Greater Yellowstone ecosystem, NNorthern Continental Dive ecosystem","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -141,\n              73.91812751603453\n            ],\n            [\n              -171.42839039022866,\n              73.91812751603453\n            ],\n            [\n              -171.42839039022866,\n              63.27142168201223\n            ],\n            [\n              -141,\n              63.27142168201223\n            ],\n            [\n              -141,\n              73.91812751603453\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    },\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -109.59931600451927,\n              45.28036682343679\n            ],\n            [\n              -111.68600415207604,\n              45.28036682343679\n            ],\n            [\n              -111.68600415207604,\n              43.57379206339982\n            ],\n            [\n              -109.59931600451927,\n              43.57379206339982\n            ],\n            [\n              -109.59931600451927,\n              45.28036682343679\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    },\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -114.59747691705815,\n              49.000318963082805\n            ],\n            [\n              -114.59747691705815,\n              45.67169215393338\n            ],\n            [\n              -112.18386752881369,\n              45.67169215393338\n            ],\n            [\n              -112.18386752881369,\n              49.000318963082805\n            ],\n            [\n              -114.59747691705815,\n              49.000318963082805\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"13","noUsgsAuthors":false,"publicationDate":"2025-07-04","publicationStatus":"PW","contributors":{"authors":[{"text":"Andersen, Erik","contributorId":334600,"corporation":false,"usgs":false,"family":"Andersen","given":"Erik","affiliations":[{"id":6661,"text":"US Fish and Wildlife Service","active":true,"usgs":false}],"preferred":false,"id":942416,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Clapp, Justin","contributorId":256932,"corporation":false,"usgs":false,"family":"Clapp","given":"Justin","email":"","affiliations":[{"id":36596,"text":"Wyoming Game and Fish Department","active":true,"usgs":false}],"preferred":false,"id":942417,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Vinks, Milan","contributorId":302379,"corporation":false,"usgs":false,"family":"Vinks","given":"Milan","email":"","affiliations":[{"id":37431,"text":"Montana Fish, Wildlife and Parks","active":true,"usgs":false}],"preferred":false,"id":942418,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Atwood, Todd C. 0000-0002-1971-3110 tatwood@usgs.gov","orcid":"https://orcid.org/0000-0002-1971-3110","contributorId":4368,"corporation":false,"usgs":true,"family":"Atwood","given":"Todd","email":"tatwood@usgs.gov","middleInitial":"C.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":942419,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Bjornlie, Daniel D.","contributorId":145512,"corporation":false,"usgs":false,"family":"Bjornlie","given":"Daniel D.","affiliations":[{"id":16140,"text":"Wyoming Game & Fish Department, Large Carnivore Section, Lander, Wyoming 82520, USA","active":true,"usgs":false}],"preferred":false,"id":942420,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Costello, Cecily M.","contributorId":145510,"corporation":false,"usgs":false,"family":"Costello","given":"Cecily M.","affiliations":[{"id":5117,"text":"University of Montana, College of Forestry and Conservation, University Hall, Room 309, Missoula, MT 59812, USA","active":true,"usgs":false}],"preferred":false,"id":942421,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Gustine, David","contributorId":200449,"corporation":false,"usgs":false,"family":"Gustine","given":"David","affiliations":[],"preferred":false,"id":942422,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Haroldson, Mark A. 0000-0002-7457-7676 mharoldson@usgs.gov","orcid":"https://orcid.org/0000-0002-7457-7676","contributorId":1773,"corporation":false,"usgs":true,"family":"Haroldson","given":"Mark","email":"mharoldson@usgs.gov","middleInitial":"A.","affiliations":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"preferred":true,"id":942423,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Roberts, Lori L.","contributorId":198347,"corporation":false,"usgs":false,"family":"Roberts","given":"Lori","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":942424,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Rode, Karyn D. 0000-0002-3328-8202 krode@usgs.gov","orcid":"https://orcid.org/0000-0002-3328-8202","contributorId":5053,"corporation":false,"usgs":true,"family":"Rode","given":"Karyn","email":"krode@usgs.gov","middleInitial":"D.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":942425,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"van Manen, Frank T. 0000-0001-5340-8489 fvanmanen@usgs.gov","orcid":"https://orcid.org/0000-0001-5340-8489","contributorId":2267,"corporation":false,"usgs":true,"family":"van Manen","given":"Frank","email":"fvanmanen@usgs.gov","middleInitial":"T.","affiliations":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"preferred":true,"id":942426,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Wilson, Ryan H. 0000-0001-7740-7771","orcid":"https://orcid.org/0000-0001-7740-7771","contributorId":130989,"corporation":false,"usgs":false,"family":"Wilson","given":"Ryan","email":"","middleInitial":"H.","affiliations":[{"id":6987,"text":"U.S. Fish and Wildlife Sevice","active":true,"usgs":false}],"preferred":false,"id":942427,"contributorType":{"id":1,"text":"Authors"},"rank":12}]}}
,{"id":70268851,"text":"70268851 - 2025 - Environmental drivers of productivity explain population patterns of an Arctic-nesting goose across a half-century","interactions":[],"lastModifiedDate":"2025-07-08T15:11:20.461854","indexId":"70268851","displayToPublicDate":"2025-07-04T08:06:20","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1450,"text":"Ecological Applications","active":true,"publicationSubtype":{"id":10}},"title":"Environmental drivers of productivity explain population patterns of an Arctic-nesting goose across a half-century","docAbstract":"<p><span>Joint estimation of demographic rates and population size has become an essential tool in ecology because it enables evaluating mechanisms for population change and testing hypotheses about drivers of demography in a single modeling framework. This approach provides a comprehensive perspective on population dynamics and how animal populations will respond to global pressures in future years. However, long-term data for such analyses are often limited in quantity and quality. We developed an integrated population model combining data on demography and population size from nine different sources to understand the population ecology of the lesser snow goose (</span><i>Anser caerulescens caerulescens</i><span>) in the Pacific Flyway in North America from 1970 to 2022. We divided the flyway population into Wrangel Island and Western Arctic subpopulations and assessed demographic mechanisms for population change and environmental and anthropogenic drivers that influenced demography. During 1970–2022, the estimated spring population of snow geese in the Pacific Flyway increased from ~300,000 to ~2,300,000. Short-term changes in population growth rate were primarily driven by changes in productivity in the Western Arctic and productivity and immigration in Wrangel Island. Changes in hunting and natural mortality had less influence on short-term but likely contributed to the pronounced long-term population growth. Early snowmelt positively influenced per capita productivity in both regions, and warm, rainy weather during the non-breeding season was associated with high per capita productivity in the Western Arctic. In the Western Arctic, per capita productivity was negatively associated with population size, and adult natural mortality was positively associated with population size, indicating density-dependent regulation in this subpopulation. In Wrangel Island, warm weather in early fall decreased juvenile natural mortality. Our results demonstrate that per capita productivity and immigration, rather than adult survival, were the primary mechanisms of short-term population change in this long-lived species. Our results also indicate that environmental conditions and density-dependent effects can impact population dynamics more than harvest, even for a long-lived, commonly harvested species. We demonstrate that a warming climate can have multiple effects on demography, emphasizing the importance of assessing a variety of spatial and temporal factors when predicting how populations might respond to large-scale environmental changes. This emphasizes the importance of conservation plans that consider these environmental drivers, although this may complicate direct management of such populations.</span></p>","language":"English","publisher":"Ecological Society of America","doi":"10.1002/eap.70067","usgsCitation":"Piironen, A., Knetter, J.M., Spragens, K., Dooley, J., Patil, V.P., Reed, E.T., Ross, M.V., Gibson, D., Behney, A.C., Petrie, M.J., Sanders, T., and Weegman, M., 2025, Environmental drivers of productivity explain population patterns of an Arctic-nesting goose across a half-century: Ecological Applications, v. 35, no. 5, e70067, 20 p., https://doi.org/10.1002/eap.70067.","productDescription":"e70067, 20 p.","ipdsId":"IP-171089","costCenters":[{"id":65299,"text":"Alaska Science Center Ecosystems","active":true,"usgs":true}],"links":[{"id":492053,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1002/eap.70067","text":"Publisher Index Page"},{"id":491799,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Canada, United States","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -172.08487226513222,\n              71.07063331009343\n            ],\n            [\n              -130.11059707127987,\n              47.88329736127733\n            ],\n            [\n              -122.71822143823626,\n              37.40446588527003\n            ],\n            [\n              -108.72794113538995,\n              38.03038976203891\n            ],\n            [\n              -101.96437027390297,\n              72.99933541265045\n            ],\n            [\n              -172.08487226513222,\n              71.07063331009343\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"35","issue":"5","noUsgsAuthors":false,"publicationDate":"2025-07-04","publicationStatus":"PW","contributors":{"authors":[{"text":"Piironen, Antti","contributorId":357731,"corporation":false,"usgs":false,"family":"Piironen","given":"Antti","affiliations":[{"id":13248,"text":"University of Saskatchewan","active":true,"usgs":false}],"preferred":false,"id":942374,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Knetter, Jeffrey M.","contributorId":198067,"corporation":false,"usgs":false,"family":"Knetter","given":"Jeffrey","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":942375,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Spragens, Kyle A.","contributorId":351933,"corporation":false,"usgs":false,"family":"Spragens","given":"Kyle A.","affiliations":[{"id":12438,"text":"Washington Department of Fish and Wildlife","active":true,"usgs":false}],"preferred":false,"id":942376,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dooley, Joshua L.","contributorId":357732,"corporation":false,"usgs":false,"family":"Dooley","given":"Joshua","middleInitial":"L.","affiliations":[{"id":85545,"text":"U.S. Fish and Wildlife Service, Division of Migratory Bird Management","active":true,"usgs":false}],"preferred":false,"id":942377,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Patil, Vijay P. 0000-0002-9357-194X vpatil@usgs.gov","orcid":"https://orcid.org/0000-0002-9357-194X","contributorId":203676,"corporation":false,"usgs":true,"family":"Patil","given":"Vijay","email":"vpatil@usgs.gov","middleInitial":"P.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":false,"id":942378,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Reed, Eric T.","contributorId":174421,"corporation":false,"usgs":false,"family":"Reed","given":"Eric","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":942379,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Ross, Megan V.","contributorId":199265,"corporation":false,"usgs":false,"family":"Ross","given":"Megan","email":"","middleInitial":"V.","affiliations":[],"preferred":false,"id":942380,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Gibson, Daniel","contributorId":94984,"corporation":false,"usgs":false,"family":"Gibson","given":"Daniel","email":"","affiliations":[{"id":6621,"text":"Colorado State University","active":true,"usgs":false}],"preferred":false,"id":942381,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Behney, Adam C.","contributorId":171686,"corporation":false,"usgs":false,"family":"Behney","given":"Adam","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":942382,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Petrie, Mark J.","contributorId":214396,"corporation":false,"usgs":false,"family":"Petrie","given":"Mark","email":"","middleInitial":"J.","affiliations":[{"id":36215,"text":"Ducks Unlimited","active":true,"usgs":false}],"preferred":false,"id":942383,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Sanders, Todd","contributorId":357733,"corporation":false,"usgs":false,"family":"Sanders","given":"Todd","affiliations":[{"id":85545,"text":"U.S. Fish and Wildlife Service, Division of Migratory Bird Management","active":true,"usgs":false}],"preferred":false,"id":942384,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Weegman, Mitch D.","contributorId":207459,"corporation":false,"usgs":false,"family":"Weegman","given":"Mitch D.","affiliations":[],"preferred":false,"id":942385,"contributorType":{"id":1,"text":"Authors"},"rank":12}]}}
,{"id":70268796,"text":"70268796 - 2025 - 2024 Surprise Inlet landslides: Insights from a prototype landslide‐triggered tsunami monitoring system in Prince William Sound, Alaska","interactions":[],"lastModifiedDate":"2025-07-08T16:16:15.639994","indexId":"70268796","displayToPublicDate":"2025-07-02T09:12:05","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1807,"text":"Geophysical Research Letters","active":true,"publicationSubtype":{"id":10}},"title":"2024 Surprise Inlet landslides: Insights from a prototype landslide‐triggered tsunami monitoring system in Prince William Sound, Alaska","docAbstract":"<p><span>Alaska's coastal communities face growing landslide hazards owing to glacier retreat and extreme weather intensified by the warming climate, yet hazard monitoring remains challenging. As part of ongoing experimental monitoring in Prince William Sound, we detected three large landslides (0.5–2.3&nbsp;M&nbsp;m</span><sup>3</sup><span>) at Surprise Inlet on 20 September 2024, within the span of an hour. These events were identified in near real-time through seismic data and later confirmed using satellite imagery, tidal records, and infrasound. The landslides generated a modest tsunami, and a 4&nbsp;cm wave was recorded by a tide gauge 18&nbsp;km away, marking the first recorded landslide to reach water since monitoring began in this region in 2021. Here, we examine the detection and interpretation of these landslides using multiple data sources and modeling. We demonstrate the effectiveness of this regional seismic monitoring system and show how complementary instrumentation, where available, can enhance detection capabilities.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2025GL115911","usgsCitation":"Karasozen, E., West, M.E., Barnhart, K.R., Lyons, J.J., Nichols, T., Schaefer, L.N., Bahng, B., Ohlendorf, S., Staley, D.M., and Wolken, G.J., 2025, 2024 Surprise Inlet landslides: Insights from a prototype landslide‐triggered tsunami monitoring system in Prince William Sound, Alaska: Geophysical Research Letters, v. 52, no. 13, e2025GL115911, 11 p., https://doi.org/10.1029/2025GL115911.","productDescription":"e2025GL115911, 11 p.","ipdsId":"IP-176964","costCenters":[{"id":78941,"text":"Geologic Hazards Science Center - Landslides / Earthquake Geology","active":true,"usgs":true}],"links":[{"id":492061,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2025gl115911","text":"Publisher Index Page"},{"id":491813,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Prince William Sound","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -148.69339399398933,\n              61.18214394792622\n            ],\n            [\n              -148.69339399398933,\n              59.91280847695441\n            ],\n            [\n              -145.64673816140657,\n              59.91280847695441\n            ],\n            [\n              -145.64673816140657,\n              61.18214394792622\n            ],\n            [\n              -148.69339399398933,\n              61.18214394792622\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"52","issue":"13","noUsgsAuthors":false,"publicationDate":"2025-07-02","publicationStatus":"PW","contributors":{"authors":[{"text":"Karasozen, Ezgi 0000-0003-1140-1427","orcid":"https://orcid.org/0000-0003-1140-1427","contributorId":244223,"corporation":false,"usgs":false,"family":"Karasozen","given":"Ezgi","email":"","affiliations":[{"id":6606,"text":"Colorado School of Mines","active":true,"usgs":false}],"preferred":false,"id":942014,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"West, Michael E.","contributorId":147407,"corporation":false,"usgs":false,"family":"West","given":"Michael","email":"","middleInitial":"E.","affiliations":[{"id":6695,"text":"UAF","active":true,"usgs":false}],"preferred":false,"id":942015,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Barnhart, Katherine R. 0000-0001-5682-455X","orcid":"https://orcid.org/0000-0001-5682-455X","contributorId":257870,"corporation":false,"usgs":true,"family":"Barnhart","given":"Katherine","email":"","middleInitial":"R.","affiliations":[{"id":300,"text":"Geologic Hazards Science Center","active":true,"usgs":true}],"preferred":true,"id":942016,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lyons, John J. 0000-0001-5409-1698 jlyons@usgs.gov","orcid":"https://orcid.org/0000-0001-5409-1698","contributorId":5394,"corporation":false,"usgs":true,"family":"Lyons","given":"John","email":"jlyons@usgs.gov","middleInitial":"J.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true},{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"preferred":true,"id":942017,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Nichols, Terry","contributorId":357616,"corporation":false,"usgs":false,"family":"Nichols","given":"Terry","affiliations":[{"id":85473,"text":"National Tsunami Warning Center, Palmer, Alaska, USA","active":true,"usgs":false}],"preferred":false,"id":942018,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Schaefer, Lauren N. 0000-0003-3216-7983","orcid":"https://orcid.org/0000-0003-3216-7983","contributorId":241997,"corporation":false,"usgs":true,"family":"Schaefer","given":"Lauren","email":"","middleInitial":"N.","affiliations":[{"id":300,"text":"Geologic Hazards Science Center","active":true,"usgs":true}],"preferred":true,"id":942019,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Bahng, Bohyun","contributorId":357617,"corporation":false,"usgs":false,"family":"Bahng","given":"Bohyun","affiliations":[{"id":85473,"text":"National Tsunami Warning Center, Palmer, Alaska, USA","active":true,"usgs":false}],"preferred":false,"id":942020,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Ohlendorf, Summer","contributorId":357618,"corporation":false,"usgs":false,"family":"Ohlendorf","given":"Summer","affiliations":[{"id":85473,"text":"National Tsunami Warning Center, Palmer, Alaska, USA","active":true,"usgs":false}],"preferred":false,"id":942021,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Staley, Dennis M. 0000-0002-2239-3402 dstaley@usgs.gov","orcid":"https://orcid.org/0000-0002-2239-3402","contributorId":4134,"corporation":false,"usgs":true,"family":"Staley","given":"Dennis","email":"dstaley@usgs.gov","middleInitial":"M.","affiliations":[{"id":300,"text":"Geologic Hazards Science Center","active":true,"usgs":true}],"preferred":true,"id":942022,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Wolken, Gabriel J.","contributorId":221149,"corporation":false,"usgs":false,"family":"Wolken","given":"Gabriel","email":"","middleInitial":"J.","affiliations":[{"id":40336,"text":"Alaska Department of Natural Resources: Division of Geological and Geophysical Surveys","active":true,"usgs":false}],"preferred":false,"id":942023,"contributorType":{"id":1,"text":"Authors"},"rank":10}]}}
,{"id":70268807,"text":"70268807 - 2025 - Arctic speleothems reveal nearly permafrost-free Northern Hemisphere in the Late Miocene","interactions":[],"lastModifiedDate":"2025-07-07T15:54:50.530354","indexId":"70268807","displayToPublicDate":"2025-07-01T10:46:02","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2842,"text":"Nature Communications","active":true,"publicationSubtype":{"id":10}},"title":"Arctic speleothems reveal nearly permafrost-free Northern Hemisphere in the Late Miocene","docAbstract":"<p><span>Arctic warming is happening at nearly four times the global average rate. Long-term trends of permafrost dynamics cannot be estimated directly from monitoring of present-day thaw processes, requiring paleoclimate-proxy information. Here we use cave carbonates (speleothems) from a northern Siberian cave to determine when the Northern Hemisphere was mostly permafrost-free. At present, thick continuous permafrost in this region prevents speleothem growth. In a series of partially eroded caves, speleothems grew during the late Tortonian stage (8.68 ± 0.09 Ma), a time when the geographic position of this site was already similar to today. Paleotemperatures reconstructed from speleothems show that mean annual air temperatures (MAAT) in the region were + 6.6°C to + 11.1°C, when contemporary global MAAT were ~ 4.5 °C higher than modern. Our findings provide direct evidence that warming to Tortonian-like temperatures would leave most of the Northern Hemisphere permafrost-free. This may release up to ~ 130 petagrams of carbon, enhancing further warming.</span></p>","language":"English","publisher":"Nature","doi":"10.1038/s41467-025-60381-5","usgsCitation":"Vaks, A., Mason, A., Breitenbach, S., Giesche, A., Osinzev, A., Adrian, I., Kononov, A., Umbo, S., Lechleitner, F., Rosensaft, M., and Henderson, G., 2025, Arctic speleothems reveal nearly permafrost-free Northern Hemisphere in the Late Miocene: Nature Communications, v. 16, 5483, 13 p., https://doi.org/10.1038/s41467-025-60381-5.","productDescription":"5483, 13 p.","ipdsId":"IP-165979","costCenters":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"links":[{"id":492044,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1038/s41467-025-60381-5","text":"Publisher Index Page"},{"id":491740,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"China, Mongolia, Russia","otherGeospatial":"Siberia","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              140,\n              75\n            ],\n            [\n              90,\n              75\n            ],\n            [\n              90,\n              45\n            ],\n            [\n              140,\n              45\n            ],\n            [\n              140,\n              75\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"16","noUsgsAuthors":false,"publicationDate":"2025-07-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Vaks, Anton","contributorId":357620,"corporation":false,"usgs":false,"family":"Vaks","given":"Anton","affiliations":[{"id":85474,"text":"Geochemistry and Environmental Geology Division, Geological Survey of Israel, Jerusalem, 9692100, Israel","active":true,"usgs":false}],"preferred":false,"id":942040,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mason, Andrew","contributorId":357621,"corporation":false,"usgs":false,"family":"Mason","given":"Andrew","affiliations":[{"id":85476,"text":"Department of Earth Sciences, Oxford University, Oxford, OX1 3AN United Kingdom","active":true,"usgs":false}],"preferred":false,"id":942041,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Breitenbach, Sebastian F.M.","contributorId":357622,"corporation":false,"usgs":false,"family":"Breitenbach","given":"Sebastian F.M.","affiliations":[{"id":84240,"text":"Department of Earth and Environmental Sciences, Northumbria University, Newcastle-Upon-Tyne, NE1 8ST, United Kingdom","active":true,"usgs":false}],"preferred":false,"id":942042,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Giesche, Alena Maria 0000-0003-3673-7269","orcid":"https://orcid.org/0000-0003-3673-7269","contributorId":344659,"corporation":false,"usgs":true,"family":"Giesche","given":"Alena Maria","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"preferred":true,"id":942043,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Osinzev, Alexander","contributorId":357623,"corporation":false,"usgs":false,"family":"Osinzev","given":"Alexander","affiliations":[{"id":84245,"text":"Speleoclub Arabika, St. Mamina-Sibiryaka 6a, 664058 Irkutsk, Russia","active":true,"usgs":false}],"preferred":false,"id":942044,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Adrian, Irina","contributorId":357624,"corporation":false,"usgs":false,"family":"Adrian","given":"Irina","affiliations":[{"id":85477,"text":"Lena Delta Wildlife Reserve, Tiksi, Sakha Republic, 678400 Russia","active":true,"usgs":false}],"preferred":false,"id":942045,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Kononov, Aleksandr","contributorId":357625,"corporation":false,"usgs":false,"family":"Kononov","given":"Aleksandr","affiliations":[{"id":85478,"text":"Irkutsk National Research Technical University, Irkutsk, 664074, Russia; Institute of the Earth's Crust, Russian Academy of Sciences, Siberian Branch, Irkutsk, 664033, Russia","active":true,"usgs":false}],"preferred":false,"id":942046,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Umbo, Stuart","contributorId":357626,"corporation":false,"usgs":false,"family":"Umbo","given":"Stuart","affiliations":[{"id":84240,"text":"Department of Earth and Environmental Sciences, Northumbria University, Newcastle-Upon-Tyne, NE1 8ST, United Kingdom","active":true,"usgs":false}],"preferred":false,"id":942047,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Lechleitner, Franziska A.","contributorId":357627,"corporation":false,"usgs":false,"family":"Lechleitner","given":"Franziska A.","affiliations":[{"id":85479,"text":"Department of Chemistry, Biochemistry and Pharmaceutical Sciences & Oeschger Centre for Climate Change Research, Bern, 2012, Switzerland","active":true,"usgs":false}],"preferred":false,"id":942048,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Rosensaft, Marcelo","contributorId":357628,"corporation":false,"usgs":false,"family":"Rosensaft","given":"Marcelo","affiliations":[{"id":85480,"text":"Geological Mapping Division, Geological Survey of Israel, Jerusalem, 9692100, Israel","active":true,"usgs":false}],"preferred":false,"id":942049,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Henderson, Gideon M.","contributorId":357629,"corporation":false,"usgs":false,"family":"Henderson","given":"Gideon M.","affiliations":[{"id":85476,"text":"Department of Earth Sciences, Oxford University, Oxford, OX1 3AN United Kingdom","active":true,"usgs":false}],"preferred":false,"id":942050,"contributorType":{"id":1,"text":"Authors"},"rank":11}]}}
,{"id":70269789,"text":"70269789 - 2025 - Makushin Volcano: Recent eruptive history and ash hazards","interactions":[],"lastModifiedDate":"2025-08-01T13:53:33.000838","indexId":"70269789","displayToPublicDate":"2025-07-01T08:50:10","publicationYear":"2025","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":2,"text":"State or Local Government Series"},"seriesTitle":{"id":17066,"text":"Alaska Division of Geological & Geophysical Surveys Information Circular","active":true,"publicationSubtype":{"id":2}},"seriesNumber":"86 v. 2","title":"Makushin Volcano: Recent eruptive history and ash hazards","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"Alaska Division of Geological and Geophysical Surveys","doi":"10.14509/31684","collaboration":"University of Alaska Fairbanks Geophysical Institute","usgsCitation":"Dietterich, H., Schaefer, J., Larsen, J., Vallance, J.W., Van Eaton, A.R., and Wallace, K.L., 2025, Makushin Volcano: Recent eruptive history and ash hazards: Alaska Division of Geological & Geophysical Surveys Information Circular 86 v. 2, 2 p., https://doi.org/10.14509/31684.","productDescription":"2 p.","ipdsId":"IP-179272","costCenters":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"links":[{"id":493337,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Makushin Volcano","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -165.77136893276906,\n              54.44504537720758\n            ],\n            [\n              -168.72942706013953,\n              54.44504537720758\n            ],\n            [\n              -168.72942706013953,\n              53.13467872883129\n            ],\n            [\n              -165.77136893276906,\n              53.13467872883129\n            ],\n            [\n              -165.77136893276906,\n              54.44504537720758\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationDate":"2025-07-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Dietterich, Hannah R. 0000-0001-7898-4343","orcid":"https://orcid.org/0000-0001-7898-4343","contributorId":212771,"corporation":false,"usgs":true,"family":"Dietterich","given":"Hannah R.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":944628,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schaefer, Janet","contributorId":199547,"corporation":false,"usgs":false,"family":"Schaefer","given":"Janet","affiliations":[],"preferred":false,"id":944629,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Larsen, Jessica 0000-0003-1171-129X","orcid":"https://orcid.org/0000-0003-1171-129X","contributorId":242808,"corporation":false,"usgs":false,"family":"Larsen","given":"Jessica","email":"","affiliations":[{"id":6752,"text":"University of Alaska Fairbanks","active":true,"usgs":false}],"preferred":false,"id":944630,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Vallance, James W. 0000-0002-3083-5469 jvallance@usgs.gov","orcid":"https://orcid.org/0000-0002-3083-5469","contributorId":547,"corporation":false,"usgs":true,"family":"Vallance","given":"James","email":"jvallance@usgs.gov","middleInitial":"W.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":944631,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Van Eaton, Alexa R. 0000-0001-6646-4594 avaneaton@usgs.gov","orcid":"https://orcid.org/0000-0001-6646-4594","contributorId":184079,"corporation":false,"usgs":true,"family":"Van Eaton","given":"Alexa","email":"avaneaton@usgs.gov","middleInitial":"R.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":944632,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Wallace, Kristi L. 0000-0002-0962-048X kwallace@usgs.gov","orcid":"https://orcid.org/0000-0002-0962-048X","contributorId":3454,"corporation":false,"usgs":true,"family":"Wallace","given":"Kristi","email":"kwallace@usgs.gov","middleInitial":"L.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":944633,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70270603,"text":"70270603 - 2025 - Paralytic shellfish toxins and seabirds: Evaluating sublethal effects, behavioral responses, and ecological implications of saxitoxin ingestion by common murres (Uria aalge)","interactions":[],"lastModifiedDate":"2025-08-21T15:14:11.794345","indexId":"70270603","displayToPublicDate":"2025-07-01T08:08:40","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1878,"text":"Harmful Algae","active":true,"publicationSubtype":{"id":10}},"title":"Paralytic shellfish toxins and seabirds: Evaluating sublethal effects, behavioral responses, and ecological implications of saxitoxin ingestion by common murres (Uria aalge)","docAbstract":"<p><span>Paralytic shellfish toxins (PSTs), including saxitoxin (STX) and its congeners, are neurotoxins that can be produced during harmful algal blooms and cause illness or death in humans, fish, seabirds, and marine mammals. Since 2014, multiple large-scale seabird mortality events have occurred in Alaska waters, with STXs detected in some carcasses. To investigate the sublethal behavioral and ecological effects of STX on seabirds, we conducted captive dosing trials with common murres (</span><i>Uria aalge</i><span>). We gavaged purified STX (dehydrated STX dihydrocholoride, STX-diHCl) or an&nbsp;</span><i>Alexandrium catenella</i><span>&nbsp;culture extract into murres, monitored behavioral responses and recovery times, and assessed tissue concentrations in individuals that died or were euthanized. Using a modified up-and-down dose-finding scheme, we estimated a median effective dose (ED</span><sub>50</sub><span>) of 89 µg STX-equivalents (eq) kg</span><sup>-1</sup><span>&nbsp;for STX-diHCl and 366 µg STX-eq kg</span><sup>-1</sup><span>&nbsp;for the&nbsp;</span><i>A. catenella</i><span>&nbsp;extract based on ecologically relevant behavior. Differences between the ED</span><sub>50</sub><span>&nbsp;estimates could reflect uncertainties in toxin equivalency factors for PST congeners, which are based on studies using purified toxins in mice and may vary across taxa or toxin matrices. Post-dosing concentrations of STX varied by tissue type across individuals, with quantifiable levels ranging from 3 to 379 µg STX-eq 100g</span><sup>-1</sup><span>. Evidence of biotransformation of STX in&nbsp;</span><i>A. catenella</i><span>&nbsp;extract-dosed birds was observed. We also measured the chronic effects of dosing with sublethal levels of STX-diHCl over seven-days, which resulted in lower fish intake among treatment birds compared to controls (-187 g day</span><sup>-1</sup><span>). This investigation improves our understanding of the ecological effects of PSTs on seabird health.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.hal.2025.102919","usgsCitation":"Smith, M.M., Dusek, R.J., Hollmen, T.E., Schoen, S.K., Van Hemert, C.R., Steinmetzer, K., Lee, A., Schlenner, J., Patil, V.P., Hardison, D., Kulis, D., Anderson, D.M., Ridge, C.D., and Hall, S., 2025, Paralytic shellfish toxins and seabirds: Evaluating sublethal effects, behavioral responses, and ecological implications of saxitoxin ingestion by common murres (Uria aalge): Harmful Algae, v. 148, 102919, 13 p., https://doi.org/10.1016/j.hal.2025.102919.","productDescription":"102919, 13 p.","ipdsId":"IP-163602","costCenters":[{"id":456,"text":"National Wildlife Health Center","active":true,"usgs":true}],"links":[{"id":494461,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1016/j.hal.2025.102919","text":"Publisher Index Page"},{"id":494384,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Cook Inlet","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -155.97596403759943,\n              62.30937650855742\n            ],\n            [\n              -155.97596403759943,\n              58.50516757521149\n            ],\n            [\n              -148.7873678483634,\n              58.50516757521149\n            ],\n            [\n              -148.7873678483634,\n              62.30937650855742\n            ],\n            [\n              -155.97596403759943,\n              62.30937650855742\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"148","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Smith, Matthew M. 0000-0002-2259-5135 mmsmith@usgs.gov","orcid":"https://orcid.org/0000-0002-2259-5135","contributorId":5115,"corporation":false,"usgs":true,"family":"Smith","given":"Matthew","email":"mmsmith@usgs.gov","middleInitial":"M.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":946651,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dusek, Robert J. 0000-0001-6177-7479 rdusek@usgs.gov","orcid":"https://orcid.org/0000-0001-6177-7479","contributorId":174374,"corporation":false,"usgs":true,"family":"Dusek","given":"Robert","email":"rdusek@usgs.gov","middleInitial":"J.","affiliations":[{"id":456,"text":"National Wildlife Health Center","active":true,"usgs":true}],"preferred":true,"id":946652,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hollmen, Tuula E.","contributorId":211728,"corporation":false,"usgs":false,"family":"Hollmen","given":"Tuula","email":"","middleInitial":"E.","affiliations":[{"id":16211,"text":"Alaska SeaLife Center","active":true,"usgs":false}],"preferred":false,"id":946653,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Schoen, Sarah K. 0000-0002-5685-5185 sschoen@usgs.gov","orcid":"https://orcid.org/0000-0002-5685-5185","contributorId":5136,"corporation":false,"usgs":true,"family":"Schoen","given":"Sarah","email":"sschoen@usgs.gov","middleInitial":"K.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":946654,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Van Hemert, Caroline R. 0000-0002-6858-7165 cvanhemert@usgs.gov","orcid":"https://orcid.org/0000-0002-6858-7165","contributorId":3592,"corporation":false,"usgs":true,"family":"Van Hemert","given":"Caroline","email":"cvanhemert@usgs.gov","middleInitial":"R.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":946655,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Steinmetzer, Kristen","contributorId":360023,"corporation":false,"usgs":false,"family":"Steinmetzer","given":"Kristen","affiliations":[{"id":16211,"text":"Alaska SeaLife Center","active":true,"usgs":false}],"preferred":false,"id":946656,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Lee, Aidan","contributorId":360024,"corporation":false,"usgs":false,"family":"Lee","given":"Aidan","affiliations":[{"id":16211,"text":"Alaska SeaLife Center","active":true,"usgs":false}],"preferred":false,"id":946657,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Schlenner, Jenna","contributorId":360027,"corporation":false,"usgs":false,"family":"Schlenner","given":"Jenna","affiliations":[{"id":16211,"text":"Alaska SeaLife Center","active":true,"usgs":false}],"preferred":false,"id":946658,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Patil, Vijay P. 0000-0002-9357-194X vpatil@usgs.gov","orcid":"https://orcid.org/0000-0002-9357-194X","contributorId":203676,"corporation":false,"usgs":true,"family":"Patil","given":"Vijay","email":"vpatil@usgs.gov","middleInitial":"P.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":false,"id":946659,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Hardison, D. Ransom","contributorId":360031,"corporation":false,"usgs":false,"family":"Hardison","given":"D. Ransom","affiliations":[{"id":85953,"text":"NOAA, NCCOS","active":true,"usgs":false}],"preferred":false,"id":946660,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Kulis, David","contributorId":360033,"corporation":false,"usgs":false,"family":"Kulis","given":"David","affiliations":[{"id":36711,"text":"Woods Hole Oceanographic Institution","active":true,"usgs":false}],"preferred":false,"id":946661,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Anderson, Donald M.","contributorId":360034,"corporation":false,"usgs":false,"family":"Anderson","given":"Donald","middleInitial":"M.","affiliations":[{"id":36711,"text":"Woods Hole Oceanographic Institution","active":true,"usgs":false}],"preferred":false,"id":946662,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Ridge, Clark D.","contributorId":360035,"corporation":false,"usgs":false,"family":"Ridge","given":"Clark","middleInitial":"D.","affiliations":[{"id":85955,"text":"US. Food and Drug Administration, Center for Food Safety and Applied Nutrition","active":true,"usgs":false}],"preferred":false,"id":946663,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Hall, Sherwood","contributorId":267371,"corporation":false,"usgs":false,"family":"Hall","given":"Sherwood","email":"","affiliations":[{"id":55479,"text":"US Food and Drug Administration, 5001 Campus Drive, College Park, Maryland, 20740, United States (sherwood.hall@fda.hhs.gov)","active":true,"usgs":false}],"preferred":false,"id":946664,"contributorType":{"id":1,"text":"Authors"},"rank":14}]}}
,{"id":70275013,"text":"70275013 - 2025 - Hemoglobin A1c is a retrospective indicator of denning in polar bears (Ursus maritimus)","interactions":[],"lastModifiedDate":"2026-04-10T15:03:40.29119","indexId":"70275013","displayToPublicDate":"2025-06-27T07:56:18","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2373,"text":"Journal of Mammalogy","onlineIssn":"1545-1542","printIssn":"0022-2372","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Hemoglobin A1c is a retrospective indicator of denning in polar bears (<i>Ursus maritimus</i>)","title":"Hemoglobin A1c is a retrospective indicator of denning in polar bears (Ursus maritimus)","docAbstract":"<p><span id=\"_mce_caret\" data-mce-bogus=\"1\" data-mce-type=\"format-caret\"><span>The nutritional health of polar bears (</span><i>Ursus maritimus)&nbsp;</i><span>&nbsp;is tied to reproductive success, and fasting status can be used to infer recent reproductive history. However, the methods currently used to determine denning and fasting status have their limitations. We examined hemoglobin A1c (HbA1c), an integrative metric of average blood glucose levels over recent months, in free-ranging Southern Beaufort Sea polar bears to assess its usefulness in determining reproductive status and fasting. We compared HbA1c between bears recently in maternity dens that included spring-captured females that were accompanied by cubs-of-the-year (</span><i>n </i><span>= 38), and non-denned bears that included spring-captured females that were accompanied by 1- or 2-yr-old cubs (</span><i>n </i><span>= 39). We predicted that HbA1c would be higher in denned females compared to non-denned females, due to the combined effects of increased circulating glucose associated with insulin resistance from fasting and gestation, as well as the energy mobilization required during early lactation. HbA1c was measured in Polar Bear whole blood samples using an enzymatic assay for quantifying HbA1c and expressed as the percentage of glycated hemoglobin over total hemoglobin. Denned females had higher mean HbA1c (</span><span id=\"_mce_caret\" data-mce-bogus=\"1\" data-mce-type=\"format-caret\"><span class=\"inline-formula\"><i><span>x̅</span></i></span></span><span> 4.70%, 95% CI = 4.54%, 4.86%) than non-denned (</span><span class=\"inline-formula\">⁠</span><span><i>x̅</i> 4.38%, 95% CI = 4.23%, 4.53%,&nbsp;</span><i>P </i><span>= 0.005). We trained a binary logistic regression model to classify the probability of recent prior denning based on HbA1c and glucose, and the model classified denning with 75% accuracy. HbA1c can be used as an effective tool for determining denning history and could have implications for monitoring reproductive success.</span></span></p>","language":"English","doi":"\\10.1093/jmammal/gyaf033","usgsCitation":"Teman, S.J., Atwood, T.C., Laidre, K.L., Virgin, E.E., Rode, K.D., Rispoli, L.A., and Curry, E., 2025, Hemoglobin A1c is a retrospective indicator of denning in polar bears (Ursus maritimus): Journal of Mammalogy, v. 106, no. 5, p. 1167-1177, https://doi.org/\\10.1093/jmammal/gyaf033.","productDescription":"11 p.","startPage":"1167","endPage":"1177","ipdsId":"IP-170021","costCenters":[{"id":65299,"text":"Alaska Science Center Ecosystems","active":true,"usgs":true}],"links":[{"id":502681,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Canada, United States","state":"Alsaka, Northwest Territories, Yukon","otherGeospatial":"South Beaufort Sea","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -157.19395086404143,\n              71.61659747066233\n            ],\n            [\n              -157.19395086404143,\n              68.87521333179674\n            ],\n            [\n              -121.11928026506885,\n              68.87521333179674\n            ],\n            [\n              -121.11928026506885,\n              71.61659747066233\n            ],\n            [\n              -157.19395086404143,\n              71.61659747066233\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"106","issue":"5","noUsgsAuthors":false,"publicationDate":"2025-06-27","publicationStatus":"PW","contributors":{"authors":[{"text":"Teman, Sarah J.","contributorId":352066,"corporation":false,"usgs":false,"family":"Teman","given":"Sarah","middleInitial":"J.","affiliations":[{"id":6934,"text":"University of Washington","active":true,"usgs":false}],"preferred":false,"id":959196,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Atwood, Todd C. 0000-0002-1971-3110 tatwood@usgs.gov","orcid":"https://orcid.org/0000-0002-1971-3110","contributorId":4368,"corporation":false,"usgs":true,"family":"Atwood","given":"Todd","email":"tatwood@usgs.gov","middleInitial":"C.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":959197,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Laidre, Kristin L.","contributorId":191798,"corporation":false,"usgs":false,"family":"Laidre","given":"Kristin","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":959198,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Virgin, Emily E.","contributorId":369807,"corporation":false,"usgs":false,"family":"Virgin","given":"Emily","middleInitial":"E.","affiliations":[{"id":87851,"text":"Center for Conservation and Research of Endangered Wildlife","active":true,"usgs":false}],"preferred":false,"id":959199,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Rode, Karyn D. 0000-0002-3328-8202 krode@usgs.gov","orcid":"https://orcid.org/0000-0002-3328-8202","contributorId":5053,"corporation":false,"usgs":true,"family":"Rode","given":"Karyn","email":"krode@usgs.gov","middleInitial":"D.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":959200,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Rispoli, Louisa A.","contributorId":369808,"corporation":false,"usgs":false,"family":"Rispoli","given":"Louisa","middleInitial":"A.","affiliations":[{"id":87851,"text":"Center for Conservation and Research of Endangered Wildlife","active":true,"usgs":false}],"preferred":false,"id":959201,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Curry, Erin","contributorId":369809,"corporation":false,"usgs":false,"family":"Curry","given":"Erin","affiliations":[{"id":87851,"text":"Center for Conservation and Research of Endangered Wildlife","active":true,"usgs":false}],"preferred":false,"id":959202,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70270650,"text":"70270650 - 2025 - Hybridization and asymmetrical introgression between the vulnerable Gray‐Headed Chickadee and a more abundant congener, the Boreal Chickadee: Implications for conservation","interactions":[],"lastModifiedDate":"2025-08-22T17:01:30.875265","indexId":"70270650","displayToPublicDate":"2025-06-26T09:54:49","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1467,"text":"Ecology and Evolution","active":true,"publicationSubtype":{"id":10}},"title":"Hybridization and asymmetrical introgression between the vulnerable Gray‐Headed Chickadee and a more abundant congener, the Boreal Chickadee: Implications for conservation","docAbstract":"<p><span>Hybridization is a common process among bird species that can precipitate a mix of positive or negative species outcomes. Particularly for rare populations, detrimental effects of hybridization on demographic growth rates and genetic integrity are of serious concern. In Alaska and a small region of northwestern Canada, the endemic subspecies of Gray-headed Chickadee (</span><i>Poecile cinctus lathami</i><span>) has declined in recent decades from being locally common to being extremely rare. The more widespread Boreal Chickadee (</span><i>P. hudsonicus</i><span>) has become increasingly abundant in areas of sympatry. These changes in abundance may have led to hybridization between Gray-headed Chickadees and Boreal Chickadees. We used a series of analyses to test for signatures of introgression at mitochondrial DNA and nuclear DNA using historical museum samples of both species collected between 1875 and 1979 as well as contemporary Boreal Chickadee samples. In addition, we modeled Gray-headed Chickadee and Boreal Chickadee demographic histories to better understand patterns of effective population size changes and gene flow over time. Introgression of Gray-headed Chickadee nuclear DNA was detected in contemporary and historical Boreal Chickadee populations, and two first-generation hybrid backcrosses were observed in the historical Boreal Chickadee samples. Lack of mitochondrial DNA introgression or backcrossing into the Gray-headed Chickadee historical samples may be an artifact of mate scarcity during the period before local abundances of Boreal Chickadee exceeded Gray-headed Chickadees. Demographic modeling with nuclear loci estimated a low level of symmetric gene flow between Gray-headed Chickadees and Boreal Chickadees since the time of divergence. Our study suggests that hybridization may be linked to Gray-headed Chickadee declines and represents a case study of how museum collections can be used to infer introgression in a population too scarce to directly investigate.</span></p>","language":"English","publisher":"Wiley","doi":"10.1002/ece3.71673","usgsCitation":"Armstrong, M., Wilson, R.E., Johnson, J.A., Booms, T.L., Gesmundo, C., Pohlen, Z.M., Leonard, P., and Sonsthagen, S.A., 2025, Hybridization and asymmetrical introgression between the vulnerable Gray‐Headed Chickadee and a more abundant congener, the Boreal Chickadee: Implications for conservation: Ecology and Evolution, v. 15, no. 7, e71673, 24 p., https://doi.org/10.1002/ece3.71673.","productDescription":"e71673, 24 p.","ipdsId":"IP-174990","costCenters":[{"id":198,"text":"Coop Res Unit Atlanta","active":true,"usgs":true}],"links":[{"id":495049,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1002/ece3.71673","text":"Publisher Index Page"},{"id":494968,"rank":0,"type":{"id":30,"text":"Data Release"},"url":"https://doi.org/10.5066/P14VRAFK","text":"USGS data release","linkHelpText":"Genomic Data from Gray-headed Chickadee and Boreal Chickadee"},{"id":494539,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Canada, United States","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -172.1919174337219,\n              61.16412670906658\n            ],\n            [\n              -129.51473236723288,\n              48.06724009877192\n            ],\n            [\n              -93.17753488654388,\n              46.064196955208274\n            ],\n            [\n              -63.72506402216072,\n              40.66890918223237\n            ],\n            [\n              -53.91974877832055,\n              47.12392212876617\n            ],\n            [\n              -71.4552518971592,\n              54.21262122953985\n            ],\n            [\n              -117.82748729757712,\n              64.7593894735477\n            ],\n            [\n              -144.17212698454327,\n              70.88681790730743\n            ],\n            [\n              -172.1919174337219,\n              61.16412670906658\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"15","issue":"7","noUsgsAuthors":false,"publicationDate":"2025-06-26","publicationStatus":"PW","contributors":{"authors":[{"text":"Armstrong, Matthew 0009-0004-6875-4631","orcid":"https://orcid.org/0009-0004-6875-4631","contributorId":355185,"corporation":false,"usgs":false,"family":"Armstrong","given":"Matthew","affiliations":[{"id":16587,"text":"University of Nebraska Lincoln","active":true,"usgs":false}],"preferred":false,"id":946763,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wilson, Robert E. 0000-0003-1800-0183","orcid":"https://orcid.org/0000-0003-1800-0183","contributorId":360072,"corporation":false,"usgs":false,"family":"Wilson","given":"Robert","middleInitial":"E.","affiliations":[{"id":16587,"text":"University of Nebraska Lincoln","active":true,"usgs":false}],"preferred":false,"id":946764,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Johnson, James A.","contributorId":360074,"corporation":false,"usgs":false,"family":"Johnson","given":"James","middleInitial":"A.","affiliations":[{"id":6661,"text":"US Fish and Wildlife Service","active":true,"usgs":false}],"preferred":false,"id":946765,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Booms, Travis L.","contributorId":199285,"corporation":false,"usgs":false,"family":"Booms","given":"Travis","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":946766,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Gesmundo, Callie","contributorId":127437,"corporation":false,"usgs":false,"family":"Gesmundo","given":"Callie","email":"","affiliations":[],"preferred":false,"id":946767,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Pohlen, Zachary M.","contributorId":344057,"corporation":false,"usgs":false,"family":"Pohlen","given":"Zachary","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":946768,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Leonard, Paul 0000-0001-8032-7449","orcid":"https://orcid.org/0000-0001-8032-7449","contributorId":355186,"corporation":false,"usgs":false,"family":"Leonard","given":"Paul","affiliations":[{"id":6661,"text":"US Fish and Wildlife Service","active":true,"usgs":false}],"preferred":false,"id":946769,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Sonsthagen, Sarah A. 0000-0001-6215-5874","orcid":"https://orcid.org/0000-0001-6215-5874","contributorId":353767,"corporation":false,"usgs":true,"family":"Sonsthagen","given":"Sarah","middleInitial":"A.","affiliations":[{"id":198,"text":"Coop Res Unit Atlanta","active":true,"usgs":true}],"preferred":true,"id":946770,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70268501,"text":"70268501 - 2025 - Permafrost–wildfire interactions: active layer thickness estimates for paired burned and unburned sites in northern high latitudes","interactions":[],"lastModifiedDate":"2025-06-27T14:34:16.141056","indexId":"70268501","displayToPublicDate":"2025-06-26T09:22:07","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1426,"text":"Earth System Science Data","active":true,"publicationSubtype":{"id":10}},"title":"Permafrost–wildfire interactions: active layer thickness estimates for paired burned and unburned sites in northern high latitudes","docAbstract":"<p><span>As the northern high-latitude permafrost zone experiences accelerated warming, permafrost has become vulnerable to widespread thaw. Simultaneously, wildfire activity across northern boreal forest and Arctic/subarctic tundra regions impacts permafrost stability through the combustion of insulating organic matter, vegetation, and post-fire changes in albedo. Efforts to synthesis the impacts of wildfire on permafrost are limited and are typically reliant on antecedent pre-fire conditions. To address this, we created the FireALT dataset by soliciting data contributions that included thaw depth measurements, site conditions, and fire event details with paired measurements at environmentally comparable burned and unburned sites. The solicitation resulted in 52 466&nbsp;thaw depth measurements from 18&nbsp;contributors across North America and Russia. Because thaw depths were taken at various times throughout the thawing season, we also estimated end-of-season active layer thickness&nbsp;(ALT) for each measurement using a modified version of the Stefan equation. Here, we describe our methods for collecting and quality-checking the data, estimating ALT, the data structure, strengths and limitations, and future research opportunities. The final dataset includes 48 669&nbsp;ALT estimates with 32&nbsp;attributes across 9446&nbsp;plots and 157&nbsp;burned–unburned pairs spanning Canada, Russia, and the United States. The data span fire events from&nbsp;1900 to&nbsp;2022 with measurements collected from&nbsp;2001 to&nbsp;2023. The time since fire ranges from 0 to 114&nbsp;years. The FireALT dataset addresses a key challenge: the ability to assess impacts of wildfire on ALT when measurements are taken at various times throughout the thaw season depending on the time of field campaigns (typically June through August) by estimating ALT at the end-of-season maximum. This dataset can be used to address understudied research areas, particularly algorithm development, calibration, and validation for evolving process-based models as well as extrapolating across space and time, which could elucidate permafrost–wildfire interactions under accelerated warming across the high-northern-latitude permafrost zone. The FireALT dataset is available through the Arctic Data Center (</span><a href=\"https://doi.org/10.18739/A2RN3092P\" data-mce-href=\"https://doi.org/10.18739/A2RN3092P\">https://doi.org/10.18739/A2RN3092P</a><span>, Talucci et al., 2024).</span></p>","language":"English","publisher":"Copernicus Publications","doi":"10.5194/essd-17-2887-2025","usgsCitation":"Talucci, A., Loranty, M., Holloway, J., Rogers, B.M., Alexander, H.D., Baillargeon, N., Baltzer, J.L., Berner, L., Breen, A., Brodt, L., Buma, B., Dean, J., Delcourt, C., Diaz, L., Dieleman, C., Douglas, T.A., Frost, G., Gaglioti, B., Hewitt, R.E., Hollingsworth, T., Jorenson, M., Lara, M.J., Loehman, R.A., Mack, M.C., Manies, K.L., Minions, C., Natali, S., O’Donnell, J.A., Olefeldt, D., Paulson, A., Rocha, A., Saperstein, L., Shestakova, T., Sistla, S., Sizov, O., Soromotin, A., Turetksy, M., Veraverbeke, S., and Walvoord, M.A., 2025, Permafrost–wildfire interactions: active layer thickness estimates for paired burned and unburned sites in northern high latitudes: Earth System Science Data, no. 17, p. 2887-2909, https://doi.org/10.5194/essd-17-2887-2025.","productDescription":"23 p.","startPage":"2887","endPage":"2909","ipdsId":"IP-172058","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true}],"links":[{"id":491716,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.5194/essd-17-2887-2025","text":"Publisher Index Page"},{"id":491526,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Canada, Russia, United States","otherGeospatial":"Arctic","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -179.9,\n              85\n            ],\n            [\n              -179.9,\n              58\n            ],\n            [\n              -90,\n              58\n            ],\n            [\n              -90,\n              85\n            ],\n            [\n              -179.9,\n              85\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    },\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              179.9,\n              85\n            ],\n            [\n              60,\n              85\n            ],\n            [\n              60,\n              58\n            ],\n            [\n              179.9,\n              58\n            ],\n            [\n              179.9,\n              85\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","issue":"17","noUsgsAuthors":false,"publicationDate":"2025-06-26","publicationStatus":"PW","contributors":{"authors":[{"text":"Talucci, Anna","contributorId":357475,"corporation":false,"usgs":false,"family":"Talucci","given":"Anna","affiliations":[{"id":56085,"text":"Woodwell Climate Research Center","active":true,"usgs":false}],"preferred":false,"id":941530,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Loranty, Michael M.","contributorId":357476,"corporation":false,"usgs":false,"family":"Loranty","given":"Michael M.","affiliations":[{"id":37669,"text":"Colgate University","active":true,"usgs":false}],"preferred":false,"id":941531,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Holloway, Jean E.","contributorId":357477,"corporation":false,"usgs":false,"family":"Holloway","given":"Jean E.","affiliations":[{"id":85427,"text":"University of Ottowa","active":true,"usgs":false}],"preferred":false,"id":941532,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rogers, Brendan M.","contributorId":169247,"corporation":false,"usgs":false,"family":"Rogers","given":"Brendan","email":"","middleInitial":"M.","affiliations":[{"id":25456,"text":"Woods Hole Research Center, Falmouth, MA, United States","active":true,"usgs":false}],"preferred":false,"id":941533,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Alexander, Heather D.","contributorId":140365,"corporation":false,"usgs":false,"family":"Alexander","given":"Heather","email":"","middleInitial":"D.","affiliations":[{"id":590,"text":"U.S. Army Corps of Engineers","active":false,"usgs":false}],"preferred":false,"id":941534,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Baillargeon, Natalie","contributorId":357478,"corporation":false,"usgs":false,"family":"Baillargeon","given":"Natalie","affiliations":[{"id":56085,"text":"Woodwell Climate Research Center","active":true,"usgs":false}],"preferred":false,"id":941535,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Baltzer, Jennifer L.","contributorId":289214,"corporation":false,"usgs":false,"family":"Baltzer","given":"Jennifer","email":"","middleInitial":"L.","affiliations":[{"id":41188,"text":"Wilfrid Laurier University","active":true,"usgs":false}],"preferred":false,"id":941536,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Berner, Logan T.","contributorId":357479,"corporation":false,"usgs":false,"family":"Berner","given":"Logan T.","affiliations":[{"id":12698,"text":"Northern Arizona University","active":true,"usgs":false}],"preferred":false,"id":941537,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Breen, Amy","contributorId":198679,"corporation":false,"usgs":false,"family":"Breen","given":"Amy","affiliations":[],"preferred":false,"id":941538,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Brodt, Leya","contributorId":357480,"corporation":false,"usgs":false,"family":"Brodt","given":"Leya","affiliations":[{"id":85428,"text":"Tyumen State University","active":true,"usgs":false}],"preferred":false,"id":941539,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Buma, Brian","contributorId":298229,"corporation":false,"usgs":false,"family":"Buma","given":"Brian","affiliations":[{"id":16824,"text":"University of Colorado Denver","active":true,"usgs":false}],"preferred":false,"id":941540,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Dean, Jacqueline","contributorId":357481,"corporation":false,"usgs":false,"family":"Dean","given":"Jacqueline","affiliations":[{"id":56085,"text":"Woodwell Climate Research Center","active":true,"usgs":false}],"preferred":false,"id":941541,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Delcourt, Clement J.F.","contributorId":357482,"corporation":false,"usgs":false,"family":"Delcourt","given":"Clement J.F.","affiliations":[{"id":85429,"text":"Vrije Universiteit","active":true,"usgs":false}],"preferred":false,"id":941542,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Diaz, Lucas R.","contributorId":357483,"corporation":false,"usgs":false,"family":"Diaz","given":"Lucas R.","affiliations":[{"id":85429,"text":"Vrije Universiteit","active":true,"usgs":false}],"preferred":false,"id":941543,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Dieleman, Catherine M.","contributorId":357484,"corporation":false,"usgs":false,"family":"Dieleman","given":"Catherine M.","affiliations":[{"id":12660,"text":"University of Guelph","active":true,"usgs":false}],"preferred":false,"id":941544,"contributorType":{"id":1,"text":"Authors"},"rank":15},{"text":"Douglas, Thomas A. 0000-0003-1314-1905","orcid":"https://orcid.org/0000-0003-1314-1905","contributorId":64553,"corporation":false,"usgs":false,"family":"Douglas","given":"Thomas","email":"","middleInitial":"A.","affiliations":[{"id":33087,"text":"Cold Regions Research and Engineering Laboratory","active":true,"usgs":false}],"preferred":true,"id":941545,"contributorType":{"id":1,"text":"Authors"},"rank":16},{"text":"Frost, Gerald","contributorId":222261,"corporation":false,"usgs":false,"family":"Frost","given":"Gerald","email":"","affiliations":[{"id":40510,"text":"ABR, Inc","active":true,"usgs":false}],"preferred":false,"id":941546,"contributorType":{"id":1,"text":"Authors"},"rank":17},{"text":"Gaglioti, Benjamin V.","contributorId":193129,"corporation":false,"usgs":false,"family":"Gaglioti","given":"Benjamin V.","affiliations":[],"preferred":false,"id":941547,"contributorType":{"id":1,"text":"Authors"},"rank":18},{"text":"Hewitt, Rebecca E.","contributorId":267276,"corporation":false,"usgs":false,"family":"Hewitt","given":"Rebecca","email":"","middleInitial":"E.","affiliations":[{"id":12698,"text":"Northern Arizona University","active":true,"usgs":false}],"preferred":false,"id":941548,"contributorType":{"id":1,"text":"Authors"},"rank":19},{"text":"Hollingsworth, Teresa N.","contributorId":343793,"corporation":false,"usgs":false,"family":"Hollingsworth","given":"Teresa N.","affiliations":[{"id":37389,"text":"U.S. Forest Service","active":true,"usgs":false}],"preferred":false,"id":941549,"contributorType":{"id":1,"text":"Authors"},"rank":20},{"text":"Jorenson, M. Torre","contributorId":357487,"corporation":false,"usgs":false,"family":"Jorenson","given":"M. Torre","affiliations":[{"id":13506,"text":"Alaska Ecoscience","active":true,"usgs":false}],"preferred":false,"id":941550,"contributorType":{"id":1,"text":"Authors"},"rank":21},{"text":"Lara, Mark J.","contributorId":194640,"corporation":false,"usgs":false,"family":"Lara","given":"Mark","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":941551,"contributorType":{"id":1,"text":"Authors"},"rank":22},{"text":"Loehman, Rachel A. 0000-0001-7680-1865 rloehman@usgs.gov","orcid":"https://orcid.org/0000-0001-7680-1865","contributorId":187605,"corporation":false,"usgs":true,"family":"Loehman","given":"Rachel","email":"rloehman@usgs.gov","middleInitial":"A.","affiliations":[{"id":118,"text":"Alaska Science Center Geography","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":false,"id":941552,"contributorType":{"id":1,"text":"Authors"},"rank":23},{"text":"Mack, Michelle C.","contributorId":169394,"corporation":false,"usgs":false,"family":"Mack","given":"Michelle","email":"","middleInitial":"C.","affiliations":[{"id":12557,"text":"University of Florida, FLREC","active":true,"usgs":false}],"preferred":false,"id":941553,"contributorType":{"id":1,"text":"Authors"},"rank":24},{"text":"Manies, Kristen L. 0000-0003-4941-9657 kmanies@usgs.gov","orcid":"https://orcid.org/0000-0003-4941-9657","contributorId":2136,"corporation":false,"usgs":true,"family":"Manies","given":"Kristen","email":"kmanies@usgs.gov","middleInitial":"L.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true},{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":941554,"contributorType":{"id":1,"text":"Authors"},"rank":25},{"text":"Minions, Christina","contributorId":243123,"corporation":false,"usgs":false,"family":"Minions","given":"Christina","email":"","affiliations":[{"id":16705,"text":"Woods Hole Research Center","active":true,"usgs":false}],"preferred":false,"id":941555,"contributorType":{"id":1,"text":"Authors"},"rank":26},{"text":"Natali, Susan M.","contributorId":288863,"corporation":false,"usgs":false,"family":"Natali","given":"Susan M.","affiliations":[{"id":61857,"text":"Woodwell Climate Research Center 149 Woods Hole Road, Falmouth MA 02540 USA","active":true,"usgs":false}],"preferred":false,"id":941556,"contributorType":{"id":1,"text":"Authors"},"rank":27},{"text":"O’Donnell, Jonathan A. 0000-0001-7031-9808","orcid":"https://orcid.org/0000-0001-7031-9808","contributorId":191423,"corporation":false,"usgs":false,"family":"O’Donnell","given":"Jonathan","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":941557,"contributorType":{"id":1,"text":"Authors"},"rank":28},{"text":"Olefeldt, David","contributorId":169408,"corporation":false,"usgs":false,"family":"Olefeldt","given":"David","affiliations":[{"id":32365,"text":"Department of Renewable Resources, University of Alberta","active":true,"usgs":false}],"preferred":false,"id":941558,"contributorType":{"id":1,"text":"Authors"},"rank":29},{"text":"Paulson, Alison K.","contributorId":357488,"corporation":false,"usgs":false,"family":"Paulson","given":"Alison K.","affiliations":[{"id":37389,"text":"U.S. Forest Service","active":true,"usgs":false}],"preferred":false,"id":941559,"contributorType":{"id":1,"text":"Authors"},"rank":30},{"text":"Rocha, Adrian V.","contributorId":357489,"corporation":false,"usgs":false,"family":"Rocha","given":"Adrian V.","affiliations":[{"id":39516,"text":"University of Notre Dame","active":true,"usgs":false}],"preferred":false,"id":941560,"contributorType":{"id":1,"text":"Authors"},"rank":31},{"text":"Saperstein, Lisa B.","contributorId":357490,"corporation":false,"usgs":false,"family":"Saperstein","given":"Lisa B.","affiliations":[{"id":36188,"text":"U.S. Fish and Wildlife Service","active":true,"usgs":false}],"preferred":false,"id":941561,"contributorType":{"id":1,"text":"Authors"},"rank":32},{"text":"Shestakova, T.A.","contributorId":357491,"corporation":false,"usgs":false,"family":"Shestakova","given":"T.A.","affiliations":[{"id":40849,"text":"University of Lleida","active":true,"usgs":false}],"preferred":false,"id":941562,"contributorType":{"id":1,"text":"Authors"},"rank":33},{"text":"Sistla, Seeta","contributorId":357492,"corporation":false,"usgs":false,"family":"Sistla","given":"Seeta","affiliations":[{"id":39917,"text":"Cal Poly","active":true,"usgs":false}],"preferred":false,"id":941563,"contributorType":{"id":1,"text":"Authors"},"rank":34},{"text":"Sizov, Oleg","contributorId":357493,"corporation":false,"usgs":false,"family":"Sizov","given":"Oleg","affiliations":[{"id":85431,"text":"Oil and Gas Research Institute","active":true,"usgs":false}],"preferred":false,"id":941564,"contributorType":{"id":1,"text":"Authors"},"rank":35},{"text":"Soromotin, Andrey","contributorId":357494,"corporation":false,"usgs":false,"family":"Soromotin","given":"Andrey","affiliations":[{"id":85428,"text":"Tyumen State University","active":true,"usgs":false}],"preferred":false,"id":941565,"contributorType":{"id":1,"text":"Authors"},"rank":36},{"text":"Turetksy, Merritt R.","contributorId":357495,"corporation":false,"usgs":false,"family":"Turetksy","given":"Merritt R.","affiliations":[{"id":13693,"text":"University of Colorado Boulder","active":true,"usgs":false}],"preferred":false,"id":941566,"contributorType":{"id":1,"text":"Authors"},"rank":37},{"text":"Veraverbeke, Sander","contributorId":357496,"corporation":false,"usgs":false,"family":"Veraverbeke","given":"Sander","affiliations":[{"id":85429,"text":"Vrije Universiteit","active":true,"usgs":false}],"preferred":false,"id":941567,"contributorType":{"id":1,"text":"Authors"},"rank":38},{"text":"Walvoord, Michelle A. 0000-0003-4269-8366","orcid":"https://orcid.org/0000-0003-4269-8366","contributorId":211843,"corporation":false,"usgs":true,"family":"Walvoord","given":"Michelle","email":"","middleInitial":"A.","affiliations":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true}],"preferred":true,"id":941568,"contributorType":{"id":1,"text":"Authors"},"rank":39}]}}
,{"id":70275012,"text":"70275012 - 2025 - Timing of Steller’s Eider remigial molt has delayed over 26-year span","interactions":[],"lastModifiedDate":"2026-04-10T15:11:37.587371","indexId":"70275012","displayToPublicDate":"2025-06-23T00:00:00","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2409,"text":"Journal of Ornithology","active":true,"publicationSubtype":{"id":10}},"title":"Timing of Steller’s Eider remigial molt has delayed over 26-year span","docAbstract":"<p><span id=\"_mce_caret\" data-mce-bogus=\"1\" data-mce-type=\"format-caret\"><span>The Steller’s Eider is a sea duck that uses specific molting areas in lagoons in southwest Alaska, and these molting populations have declined in recent decades. The annual flight feather molt is a significant stage in avian life-history. The focus of this study was to characterize the phenology of Steller’s Eider flight feather molt timing and explore if molt timing is (1) earlier, (2) remained unchanged, or (3) is delayed. We developed a flight feather growth function throughout molt using data from captive birds. We used measurements from free-ranging birds over a 26-year period to investigate variation in molt start dates among sexes, years, and locations. Results indicate that fall molt timing has delayed over 26&nbsp;years for Steller’s Eiders in our study area. We speculate that drivers of observed change in timing may be related to changes in seasonal Arctic environmental conditions. Our findings can be used by managers to inform timing of population surveys.</span></span></p>","language":"English","publisher":"Springer Nature","doi":"10.1007/s10336-025-02303-2","usgsCitation":"Ulman, S.E., Hollmen, T.E., and Flint, P.L., 2025, Timing of Steller’s Eider remigial molt has delayed over 26-year span: Journal of Ornithology, v. 167, p. 189-197, https://doi.org/10.1007/s10336-025-02303-2.","productDescription":"9 p.","startPage":"189","endPage":"197","ipdsId":"IP-141232","costCenters":[{"id":65299,"text":"Alaska Science Center Ecosystems","active":true,"usgs":true}],"links":[{"id":502685,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"southwest Alaska","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -179.59962415098911,\n              52.10437509841003\n            ],\n            [\n              -179.4861183653336,\n              50.45182806852918\n            ],\n            [\n              -165.82220413872585,\n              52.707733413986745\n            ],\n            [\n              -149.44879640767203,\n              57.167916274932196\n            ],\n            [\n              -151.3650372403525,\n              61.39831742623903\n            ],\n            [\n              -158.62399129110142,\n              60.303497443694795\n            ],\n            [\n              -162.688181341742,\n              58.619433781920065\n            ],\n            [\n              -160.26363272511944,\n              57.38846720277435\n            ],\n            [\n              -165.94179631757575,\n              55.23170376840372\n            ],\n            [\n              -179.59962415098911,\n              52.10437509841003\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"167","noUsgsAuthors":false,"publicationDate":"2025-06-23","publicationStatus":"PW","contributors":{"authors":[{"text":"Ulman, Sadie E.","contributorId":305922,"corporation":false,"usgs":false,"family":"Ulman","given":"Sadie","middleInitial":"E.","affiliations":[{"id":16211,"text":"Alaska SeaLife Center","active":true,"usgs":false}],"preferred":false,"id":959193,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hollmen, Tuula E.","contributorId":211728,"corporation":false,"usgs":false,"family":"Hollmen","given":"Tuula","email":"","middleInitial":"E.","affiliations":[{"id":16211,"text":"Alaska SeaLife Center","active":true,"usgs":false}],"preferred":false,"id":959194,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Flint, Paul L. 0000-0002-8758-6993 pflint@usgs.gov","orcid":"https://orcid.org/0000-0002-8758-6993","contributorId":3284,"corporation":false,"usgs":true,"family":"Flint","given":"Paul","email":"pflint@usgs.gov","middleInitial":"L.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":959195,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70271930,"text":"70271930 - 2025 - Beak deformities in Buteo jamaicensis (Red-tailed Hawk) signal possible emergence of avian keratin disorder among raptors","interactions":[],"lastModifiedDate":"2025-12-01T16:43:31.171083","indexId":"70271930","displayToPublicDate":"2025-06-20T10:15:57","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":10109,"text":"Ornithology","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Beak deformities in <i>Buteo jamaicensis</i> (Red-tailed Hawk) signal possible emergence of avian keratin disorder among raptors","title":"Beak deformities in Buteo jamaicensis (Red-tailed Hawk) signal possible emergence of avian keratin disorder among raptors","docAbstract":"<p><span>Beginning in the late 1990s, an unusual cluster of beak deformities was observed among&nbsp;</span><i>Buteo jamaicensis</i><span>&nbsp;(Red-tailed Hawk) in the Pacific coastal region of North America. However, information was not available to determine the scope of this problem nor to assess a potential link between beak deformities in hawks and avian keratin disorder (AKD), an emerging disease primarily among passerines that causes overgrowth of the keratinized layer of the beak. To help address these knowledge gaps, we compiled capture records, citizen science reports, and other available data from across North America. As part of a long-term raptor monitoring program in Washington, we detected anomalously high rates of beak deformities in 29% and other keratin abnormalities in an additional 19% of&nbsp;</span><i>B. jamaicensis</i><span>&nbsp;between 2014 and 2021. We also identified more than 100 other AKD-like cases in&nbsp;</span><i>B. jamaicensis</i><span>, largely clustered in the Pacific coastal region, with most reports from 2000 to present. Pathologic examination of affected hawks revealed gross and microscopic features consistent with AKD in passerines, while shared epidemiological patterns, including timing of emergence, provided further evidence that this disease may impact an ecologically diverse suite of species. We detected poecivirus, a novel avian virus implicated as a likely cause of AKD in&nbsp;</span><i>Poecile atricapillus</i><span>&nbsp;(Black-capped Chickadee), in 1 out of 10 swabs collected from live&nbsp;</span><i>B. jamaicensis</i><span>, with gross beak deformities, suggesting the possibility of a shared viral etiology across species. However, additional work would be needed to determine the underlying cause of beak deformities in and their potential impacts on&nbsp;</span><i>B. jamaicensis</i><span>. By documenting this cluster of beak deformities, we hope to raise awareness among the ornithological community, including raptor researchers, to better track current and future outbreaks of beak deformities and related conditions.</span></p>","language":"English","publisher":"Oxford Academic","doi":"10.1093/ornithology/ukaf023","usgsCitation":"Van Hemert, C.R., Handel, C.M., Cottrell, S., Gerik, D., and Bildfell, R.J., 2025, Beak deformities in Buteo jamaicensis (Red-tailed Hawk) signal possible emergence of avian keratin disorder among raptors: Ornithology, v. 142, no. 4, ukaf023, 11 p., https://doi.org/10.1093/ornithology/ukaf023.","productDescription":"ukaf023, 11 p.","ipdsId":"IP-174862","costCenters":[{"id":65299,"text":"Alaska Science Center Ecosystems","active":true,"usgs":true}],"links":[{"id":496153,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1093/ornithology/ukaf023","text":"Publisher Index Page"},{"id":496012,"rank":2,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"142","issue":"4","noUsgsAuthors":false,"publicationDate":"2025-06-20","publicationStatus":"PW","contributors":{"authors":[{"text":"Van Hemert, Caroline R. 0000-0002-6858-7165 cvanhemert@usgs.gov","orcid":"https://orcid.org/0000-0002-6858-7165","contributorId":3592,"corporation":false,"usgs":true,"family":"Van Hemert","given":"Caroline","email":"cvanhemert@usgs.gov","middleInitial":"R.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":949412,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Handel, Colleen M. 0000-0002-0267-7408 cmhandel@usgs.gov","orcid":"https://orcid.org/0000-0002-0267-7408","contributorId":3067,"corporation":false,"usgs":true,"family":"Handel","given":"Colleen","email":"cmhandel@usgs.gov","middleInitial":"M.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":949413,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Cottrell, Susan","contributorId":361770,"corporation":false,"usgs":false,"family":"Cottrell","given":"Susan","affiliations":[{"id":86348,"text":"Raptor Studies Northwest","active":true,"usgs":false}],"preferred":false,"id":949414,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Gerik, Danielle Elizabeth 0000-0002-2906-1195","orcid":"https://orcid.org/0000-0002-2906-1195","contributorId":292922,"corporation":false,"usgs":true,"family":"Gerik","given":"Danielle Elizabeth","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":949415,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Bildfell, Robert J.","contributorId":361771,"corporation":false,"usgs":false,"family":"Bildfell","given":"Robert","middleInitial":"J.","affiliations":[{"id":6680,"text":"Oregon State University","active":true,"usgs":false}],"preferred":false,"id":949416,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70273971,"text":"70273971 - 2025 - Streamflow regime characterization in the changing boreal ecosystem: Wildfire impacts from stream-to-regional scales","interactions":[],"lastModifiedDate":"2026-02-20T17:06:56.875893","indexId":"70273971","displayToPublicDate":"2025-06-19T09:57:48","publicationYear":"2025","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3352,"text":"Science of the Total Environment","active":true,"publicationSubtype":{"id":10}},"title":"Streamflow regime characterization in the changing boreal ecosystem: Wildfire impacts from stream-to-regional scales","docAbstract":"<p><span id=\"_mce_caret\" data-mce-bogus=\"1\" data-mce-type=\"format-caret\"><span>The boreal ecosystem has experienced significant changes over recent decades as wildfires become more frequent, intense, and severe. As streams are highly prevalent and ecologically relevant, understanding interactions among wildfire and hydrologic patterns is important for effective&nbsp;aquatic ecosystem&nbsp;management. This study used a Bayesian mixture model to classify&nbsp;streamflow&nbsp;regimes from modeled&nbsp;streamflow&nbsp;data for 32,730 stream reaches (totaling 295,880&nbsp;km) across the Yukon and Kuskokwim basins and the Northwestern Boreal Ecosystem in Alaska,&nbsp;USA, and Yukon Territory, Canada. We assessed time since burn and calculated the total length of stream (km) within burn perimeters for each streamflow class from 1985 to 2015. Additionally, we used field observations (2018–2022) to compare streamflow regimes in four burned and four unburned&nbsp;headwater&nbsp;streams (drainage basins ≤150&nbsp;km</span><sup>2</sup><span>) in interior Alaska. Modeled stream reaches were grouped into twenty-two classes and reduced to eleven metaclasses based on similarities in streamflow statistics. These metaclasses formed two broad groups: 1) large rivers with lower variability and strong seasonal signals, and 2) mid- to small-sized tributaries with high variability, frequent high flow events, and weaker seasonal signals. The stream length burned analysis indicated an average increase of 47&nbsp;km per year with first- and second-order streams experiencing more frequent fire. Empirical streamflow metrics from&nbsp;headwater&nbsp;stream gages revealed additional differences in streamflow patterns between burned and unburned streams. This streamflow classification establishes a baseline for understanding boreal stream responses to wildfire, detecting climate-induced regime shifts, and facilitating management and conservation of important boreal&nbsp;aquatic species.</span></span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.scitotenv.2025.179770","usgsCitation":"Strohm, D.D., Sergeant, C.J., Paul, J.D., Falke, J.A., 2025, Streamflow regime characterization in the changing boreal ecosystem: Wildfire impacts from stream-to-regional scales: Science of the Total Environment, v. 991, 179770, 14 p., https://doi.org/10.1016/j.scitotenv.2025.179770.","productDescription":"179770, 14 p.","ipdsId":"IP-173153","costCenters":[{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true}],"links":[{"id":500353,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Boreal Yukon-Kuskokwim study area","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -151.25073280649116,\n              65.22533418311923\n            ],\n            [\n              -151.08883708497373,\n              64.1874521027234\n            ],\n            [\n              -147.81756784832672,\n              64.90432777046252\n            ],\n            [\n              -144.75370718998238,\n              64.258653756473\n            ],\n            [\n              -144.56100126166737,\n              65.39083680482943\n            ],\n            [\n              -148.2119885011982,\n              65.53590677988976\n            ],\n            [\n              -151.25073280649116,\n              65.22533418311923\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"991","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Strohm, Deanna D.","contributorId":366469,"corporation":false,"usgs":false,"family":"Strohm","given":"Deanna","middleInitial":"D.","affiliations":[{"id":6752,"text":"University of Alaska Fairbanks","active":true,"usgs":false}],"preferred":false,"id":955951,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sergeant, Christopher J.","contributorId":140496,"corporation":false,"usgs":false,"family":"Sergeant","given":"Christopher","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":955953,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Paul, Josh D.","contributorId":366470,"corporation":false,"usgs":false,"family":"Paul","given":"Josh","middleInitial":"D.","affiliations":[{"id":6752,"text":"University of Alaska Fairbanks","active":true,"usgs":false}],"preferred":false,"id":955954,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Falke, Jeffrey A. 0000-0002-6670-8250 jfalke@usgs.gov","orcid":"https://orcid.org/0000-0002-6670-8250","contributorId":5195,"corporation":false,"usgs":true,"family":"Falke","given":"Jeffrey","email":"jfalke@usgs.gov","middleInitial":"A.","affiliations":[{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true}],"preferred":true,"id":955952,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
]}