{"pageNumber":"17","pageRowStart":"400","pageSize":"25","recordCount":184569,"records":[{"id":70272730,"text":"70272730 - 2026 - Hosts, pathogens and hot ponds: Thermal mean and variability contribute to spatial patterns of chytrid infection","interactions":[],"lastModifiedDate":"2026-02-09T16:13:12.344243","indexId":"70272730","displayToPublicDate":"2025-11-24T08:27:37","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2939,"text":"Oikos","active":true,"publicationSubtype":{"id":10}},"title":"Hosts, pathogens and hot ponds: Thermal mean and variability contribute to spatial patterns of chytrid infection","docAbstract":"

Temperature is a primary driver of heterogeneity in host–pathogen dynamics and understanding how patch-scale temperature affects landscape-scale patterns of pathogen infection is key to effective monitoring and management. In field studies, both temperature variability and mean temperature are often related to infection of ectothermic animals by fungal pathogens, and although these factors vary spatiotemporally, their contributions to infection outcomes are rarely decomposed into spatial and temporal components. We studied how patch-scale thermal conditions (mean and variability) affect infection of eastern newts Notophthalmus viridescens by Batrachochytrium dendrobatidis (Bd), with a special focus on disentangling spatial versus temporal contributions of thermal conditions to infection outcomes. We measured in situtemperature and Bd infection across 20 ponds in two years in southeastern Wisconsin, USA to 1) understand thermal mediation of infection and 2) quantify whether seasonal and/or among-site variation in thermal conditions drive heterogeneity in host–pathogen interactions. In our system, thermal mean and variability covaried tightly, necessitating the creation of a single index to capture both components. We found that 1) this index of thermal mean and variability was strongly and nonlinearly related to Bd infection and 2) differences among patches in thermal conditions drove this relationship, highlighting that variation in patch-level conditions can drive heterogenous host–pathogen outcomes across landscapes. Our research collectively reveals insights about the importance of local, patch-level conditions for mediating disease risk at broader scales.

","language":"English","publisher":"Nordic Society Oikos","doi":"10.1002/oik.11503","usgsCitation":"Hobart, B.K., Grear, D.A., Winzeler, M., Mcdevitt-Galles, T., Korpita, T.M., Muths, E., and McKenzie, V.J., 2026, Hosts, pathogens and hot ponds: Thermal mean and variability contribute to spatial patterns of chytrid infection: Oikos, v. 2026, no. 2, e11503, 12 p., https://doi.org/10.1002/oik.11503.","productDescription":"e11503, 12 p.","ipdsId":"IP-161965","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true},{"id":456,"text":"National Wildlife Health Center","active":true,"usgs":true}],"links":[{"id":501963,"rank":3,"type":{"id":30,"text":"Data Release"},"url":"https://doi.org/10.5066/P1WEHHZG","text":"USGS data release","linkHelpText":"Hosts, pathogens, and hot ponds: Thermal variability and heat contribute jointly to spatial patterns of chytrid infection in amphibians in southern Wisconsin, data release"},{"id":497133,"rank":2,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":497385,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1002/oik.11503","text":"Publisher Index Page"}],"country":"United States","state":"Wisconsin","volume":"2026","issue":"2","noUsgsAuthors":false,"publicationDate":"2025-11-24","publicationStatus":"PW","contributors":{"authors":[{"text":"Hobart, Brendan K","contributorId":363337,"corporation":false,"usgs":false,"family":"Hobart","given":"Brendan","middleInitial":"K","affiliations":[{"id":13693,"text":"University of Colorado Boulder","active":true,"usgs":false}],"preferred":false,"id":951459,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Grear, Daniel A. 0000-0002-5478-1549 dgrear@usgs.gov","orcid":"https://orcid.org/0000-0002-5478-1549","contributorId":189819,"corporation":false,"usgs":true,"family":"Grear","given":"Daniel","email":"dgrear@usgs.gov","middleInitial":"A.","affiliations":[{"id":456,"text":"National Wildlife Health Center","active":true,"usgs":true}],"preferred":true,"id":951460,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Winzeler, Megan 0000-0002-0361-1582 mwinzeler@usgs.gov","orcid":"https://orcid.org/0000-0002-0361-1582","contributorId":196714,"corporation":false,"usgs":true,"family":"Winzeler","given":"Megan","email":"mwinzeler@usgs.gov","affiliations":[],"preferred":true,"id":951461,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Mcdevitt-Galles, Travis 0000-0002-4929-5431","orcid":"https://orcid.org/0000-0002-4929-5431","contributorId":315374,"corporation":false,"usgs":true,"family":"Mcdevitt-Galles","given":"Travis","email":"","affiliations":[{"id":456,"text":"National Wildlife Health Center","active":true,"usgs":true}],"preferred":true,"id":951462,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Korpita, Timothy M","contributorId":363340,"corporation":false,"usgs":false,"family":"Korpita","given":"Timothy","middleInitial":"M","affiliations":[{"id":13693,"text":"University of Colorado Boulder","active":true,"usgs":false}],"preferred":false,"id":951463,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Muths, Erin L. 0000-0002-5498-3132","orcid":"https://orcid.org/0000-0002-5498-3132","contributorId":243368,"corporation":false,"usgs":true,"family":"Muths","given":"Erin L.","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":951464,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"McKenzie, Valerie J","contributorId":363341,"corporation":false,"usgs":false,"family":"McKenzie","given":"Valerie","middleInitial":"J","affiliations":[{"id":13693,"text":"University of Colorado Boulder","active":true,"usgs":false}],"preferred":false,"id":951465,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70272969,"text":"70272969 - 2026 - How high? Identifying elevation thresholds to guide coastal marsh restoration","interactions":[],"lastModifiedDate":"2026-01-22T16:39:47.867425","indexId":"70272969","displayToPublicDate":"2025-11-24T07:58:37","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3271,"text":"Restoration Ecology","active":true,"publicationSubtype":{"id":10}},"title":"How high? Identifying elevation thresholds to guide coastal marsh restoration","docAbstract":"

Introduction

Coastal marshes are highly valuable ecosystems facing threats from rising sea levels and intensifying storm events. To elevate marsh surfaces and prevent loss of ecosystem services, the beneficial use of dredged material (BUDM) is increasingly being implemented across the United States.

Objectives

The objective of this study was to aid decision-makers and restoration practitioners by identifying elevation thresholds that control the optimal function of Spartina patens-dominated marshes along the Texas Coast.

Methods

This study was conducted in the coastal marshes of the J.D. Murphree Wildlife Management Area (Texas). We collected elevation and vegetation cover data along ecological transition zones in marshes nourished with BUDM to identify elevation thresholds that define zones of optimal plant survivorship and growth.

Results

We identified lower (−0.05 m mean high water, MHW) and upper (0.26 m MHW) elevation thresholds that defined transitions to open water and unvegetated bare ground, respectively. Elevation targets (T) and elevation target zones, which defined areas with the greatest vegetation cover, were determined for S. patens (T: 0.11 m, target zone: −0.06 to 0.26 m MHW), S. alterniflora (T: 0.00 m, target zone: −0.12 to 0.10 m MHW), and Distichlis spicata (T: 0.17 m, target zone: 0.07–0.25 m MHW).

Conclusions

Our analyses provide species-specific elevation targets for coastal marsh restoration through BUDM, which can improve restoration outcomes for coastal wetlands.

","language":"English","publisher":"Society for Ecological Restoration","doi":"10.1111/rec.70232","usgsCitation":"Fromenthal, E.N., Stagg, C.L., Moon, J.A., Abshier, T., Alawneh, O., Cadigan, J.A., Gallegos, D.A., Harris, B.D., Hurst, N.R., Jafari, N.H., Merendino, T., Nelson, M.R., Osland, M.J., Pauling, P., Rezsutek, M., Sanspree, C.R., and Villani, R.K., 2026, How high? Identifying elevation thresholds to guide coastal marsh restoration: Restoration Ecology, v. 34, no. 1, e70232, 11 p., https://doi.org/10.1111/rec.70232.","productDescription":"e70232, 11 p.","ipdsId":"IP-176516","costCenters":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"links":[{"id":497382,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/rec.70232","text":"Publisher Index Page"},{"id":497323,"rank":2,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Texas","otherGeospatial":"J.D. Murphree Wildlife Management Area","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -95.16372427589603,\n 29.864573785630768\n ],\n [\n -95.16372427589603,\n 29.388146335695794\n ],\n [\n -94.43439840716935,\n 29.388146335695794\n ],\n [\n -94.43439840716935,\n 29.864573785630768\n ],\n [\n -95.16372427589603,\n 29.864573785630768\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"34","issue":"1","noUsgsAuthors":false,"publicationDate":"2025-11-24","publicationStatus":"PW","contributors":{"authors":[{"text":"Fromenthal, Emily N. 0009-0007-6043-7537","orcid":"https://orcid.org/0009-0007-6043-7537","contributorId":334303,"corporation":false,"usgs":false,"family":"Fromenthal","given":"Emily","middleInitial":"N.","affiliations":[{"id":80112,"text":"Cherokee Nationa System Solutions contractor in support of U.S. Geological Survey, Wetland and Aquatic Research Center","active":true,"usgs":false}],"preferred":false,"id":951925,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stagg, Camille L. 0000-0002-1125-7253","orcid":"https://orcid.org/0000-0002-1125-7253","contributorId":214497,"corporation":false,"usgs":true,"family":"Stagg","given":"Camille","middleInitial":"L.","affiliations":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"preferred":true,"id":951926,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Moon, Jena A. 0000-0001-5141-2281","orcid":"https://orcid.org/0000-0001-5141-2281","contributorId":360893,"corporation":false,"usgs":false,"family":"Moon","given":"Jena","middleInitial":"A.","affiliations":[{"id":36188,"text":"U.S. Fish and Wildlife Service","active":true,"usgs":false}],"preferred":false,"id":951927,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Abshier, Taylor","contributorId":363747,"corporation":false,"usgs":false,"family":"Abshier","given":"Taylor","affiliations":[{"id":36215,"text":"Ducks Unlimited","active":true,"usgs":false}],"preferred":false,"id":951928,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Alawneh, Omar","contributorId":363748,"corporation":false,"usgs":false,"family":"Alawneh","given":"Omar","affiliations":[{"id":6747,"text":"Texas A&M University","active":true,"usgs":false}],"preferred":false,"id":951929,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Cadigan, Jack A. 0000-0002-1200-8275","orcid":"https://orcid.org/0000-0002-1200-8275","contributorId":296178,"corporation":false,"usgs":false,"family":"Cadigan","given":"Jack","email":"","middleInitial":"A.","affiliations":[{"id":5115,"text":"Louisiana State University","active":true,"usgs":false}],"preferred":false,"id":951930,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Gallegos, Daniel A. 0009-0004-5253-8694","orcid":"https://orcid.org/0009-0004-5253-8694","contributorId":363749,"corporation":false,"usgs":false,"family":"Gallegos","given":"Daniel","middleInitial":"A.","affiliations":[{"id":590,"text":"U.S. Army Corps of Engineers","active":false,"usgs":false}],"preferred":false,"id":951931,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Harris, Brian D. 0000-0001-5771-1880","orcid":"https://orcid.org/0000-0001-5771-1880","contributorId":296180,"corporation":false,"usgs":false,"family":"Harris","given":"Brian","email":"","middleInitial":"D.","affiliations":[{"id":5115,"text":"Louisiana State University","active":true,"usgs":false}],"preferred":false,"id":951932,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Hurst, Nia R. 0000-0002-9238-8502","orcid":"https://orcid.org/0000-0002-9238-8502","contributorId":363750,"corporation":false,"usgs":false,"family":"Hurst","given":"Nia","middleInitial":"R.","affiliations":[{"id":590,"text":"U.S. Army Corps of Engineers","active":false,"usgs":false}],"preferred":false,"id":951933,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Jafari, Navid H. 0000-0002-4394-3776","orcid":"https://orcid.org/0000-0002-4394-3776","contributorId":363751,"corporation":false,"usgs":false,"family":"Jafari","given":"Navid","middleInitial":"H.","affiliations":[{"id":6747,"text":"Texas A&M University","active":true,"usgs":false}],"preferred":false,"id":951934,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Merendino, Todd","contributorId":363752,"corporation":false,"usgs":false,"family":"Merendino","given":"Todd","affiliations":[{"id":36215,"text":"Ducks Unlimited","active":true,"usgs":false}],"preferred":false,"id":951935,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Nelson, Matthew R.","contributorId":166943,"corporation":false,"usgs":false,"family":"Nelson","given":"Matthew","email":"","middleInitial":"R.","affiliations":[{"id":24577,"text":"University of Minnesota, St. Paul, MN","active":true,"usgs":false}],"preferred":false,"id":951936,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Osland, Michael J. 0000-0001-9902-8692","orcid":"https://orcid.org/0000-0001-9902-8692","contributorId":213400,"corporation":false,"usgs":true,"family":"Osland","given":"Michael","middleInitial":"J.","affiliations":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"preferred":true,"id":951937,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Pauling, Philip","contributorId":363754,"corporation":false,"usgs":false,"family":"Pauling","given":"Philip","affiliations":[{"id":27442,"text":"Texas parks and Wildlife Department","active":true,"usgs":false}],"preferred":false,"id":951938,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Rezsutek, Michael","contributorId":363756,"corporation":false,"usgs":false,"family":"Rezsutek","given":"Michael","affiliations":[{"id":27442,"text":"Texas parks and Wildlife Department","active":true,"usgs":false}],"preferred":false,"id":951939,"contributorType":{"id":1,"text":"Authors"},"rank":15},{"text":"Sanspree, Colt R. 0000-0001-9794-5008","orcid":"https://orcid.org/0000-0001-9794-5008","contributorId":360902,"corporation":false,"usgs":false,"family":"Sanspree","given":"Colt","middleInitial":"R.","affiliations":[{"id":6661,"text":"US Fish and Wildlife Service","active":true,"usgs":false}],"preferred":false,"id":951940,"contributorType":{"id":1,"text":"Authors"},"rank":16},{"text":"Villani, Rachel Katherine 0000-0002-8494-8178","orcid":"https://orcid.org/0000-0002-8494-8178","contributorId":290308,"corporation":false,"usgs":true,"family":"Villani","given":"Rachel","email":"","middleInitial":"Katherine","affiliations":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"preferred":true,"id":951941,"contributorType":{"id":1,"text":"Authors"},"rank":17}]}} ,{"id":70273453,"text":"70273453 - 2026 - The 1912 Ms 7.2 earthquake in the Denali region of central Alaska","interactions":[],"lastModifiedDate":"2026-02-09T16:24:50.573071","indexId":"70273453","displayToPublicDate":"2025-11-20T09:50:26","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"displayTitle":"The 1912 Ms 7.2 earthquake in the Denali region of central Alaska","title":"The 1912 Ms 7.2 earthquake in the Denali region of central Alaska","docAbstract":"

The 2002 Mw 7.9 earthquake in central Alaska ruptured 340 km on three faults—Susitna Glacier thrust fault, Denali fault, Totschunda fault—crossing both the Richardson Highway and the Alaska Pipeline. Its occurrence prompted renewed interest in historical large earthquakes that possibly originated on the Denali fault. One of these earthquakes was a Ms 7.2 event on July 7, 1912, which we revisit with two approaches: (1) probabilistic relocation of the epicenter using globally recorded arrival times, and (2) compilation and reassessment of shaking intensity reports to estimate a macroseismic epicenter. Our preferred instrumental epicenter is west of the Parks Highway and in agreement with the maximum‐reported shaking, which was from the Parker–Browne expedition of Denali. We also relocated a Ms 6.4 aftershock, whose epicenter is 11 km from the mainshock. Candidate faults for the 1912 earthquake include the Denali fault, the McLeod Creek thrust fault, and the Kantishna Hills thrust fault. Future analysis of active faults, paleoseismic results, 1912 instrumental data, and 1912 felt reports may help in interpreting the fault and mechanism of the 1912 earthquake.

","language":"English","publisher":"Seismological Society of America","doi":"10.1785/0120250150","usgsCitation":"Tape, C., Aquino-Lopez, M., Bemis, S., Haeussler, P., and Ginnaty, J., 2026, The 1912 Ms 7.2 earthquake in the Denali region of central Alaska: Bulletin of the Seismological Society of America, v. 116, no. 1, p. 322-354, https://doi.org/10.1785/0120250150.","productDescription":"33 p.","startPage":"322","endPage":"354","ipdsId":"IP-182077","costCenters":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"links":[{"id":498617,"rank":2,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":498703,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1785/0120250150","text":"Publisher Index Page"}],"country":"United States","state":"Alaska","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -169.43690719365998,\n 66.58359872082357\n ],\n [\n -169.43690719365998,\n 53.57022459464301\n ],\n [\n -130.19988331357695,\n 53.57022459464301\n ],\n [\n -130.19988331357695,\n 66.58359872082357\n ],\n [\n -169.43690719365998,\n 66.58359872082357\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"116","issue":"1","noUsgsAuthors":false,"publicationDate":"2025-11-20","publicationStatus":"PW","contributors":{"authors":[{"text":"Tape, Carl","contributorId":219960,"corporation":false,"usgs":false,"family":"Tape","given":"Carl","email":"","affiliations":[{"id":40098,"text":"Geophysical Institute, 2156 Koyukuk Drive, University of Alaska Fairbanks, Fairbanks, AK 99775","active":true,"usgs":false}],"preferred":false,"id":953755,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Aquino-Lopez, Marco","contributorId":331553,"corporation":false,"usgs":false,"family":"Aquino-Lopez","given":"Marco","affiliations":[],"preferred":false,"id":953756,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bemis, Sean","contributorId":175460,"corporation":false,"usgs":false,"family":"Bemis","given":"Sean","affiliations":[{"id":27572,"text":"UK","active":true,"usgs":false}],"preferred":false,"id":953757,"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":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"preferred":true,"id":953758,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ginnaty, Jessalyn","contributorId":365145,"corporation":false,"usgs":false,"family":"Ginnaty","given":"Jessalyn","affiliations":[{"id":7211,"text":"University of Alaska, Fairbanks","active":true,"usgs":false}],"preferred":false,"id":953759,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70273661,"text":"70273661 - 2026 - Demographic mechanisms of snowshoe hare population cycles in Yukon, Canada","interactions":[],"lastModifiedDate":"2026-01-22T15:15:07.211159","indexId":"70273661","displayToPublicDate":"2025-11-20T09:09:45","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2158,"text":"Journal of Animal Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Demographic mechanisms of snowshoe hare population cycles in Yukon, Canada","docAbstract":"
  1. One hundred years have elapsed since Charles Elton (1924) described the periodic fluctuations in North American snowshoe hare abundance, yet mechanisms underlying 9–11-year population cycles in snowshoe hares continue to be debated.
  2. We applied multistate capture–mark–recapture models to long-term field data (1977–2020) based on >20,000 captures of >7000 unique snowshoe hares (Lepus americanus) from Kluane Lake, Yukon, Canada, to estimate and model state-specific demographic parameters. Juveniles had the lowest and reproductive adult females the highest apparent survival. Apparent survival of all sex-age classes was highest during the mid- and late-breeding seasons and was generally better during the increase phase.
  3. Conditional probability of females transitioning from non-reproductive to reproductive state, and reproductive females remaining in the reproductive state, increased substantially as the population transitioned from low to increase phase throughout the breeding season.
  4. Analysis of stage-structured matrix population models revealed that population-dynamic characteristics were strongly phase-specific, and also varied across seasons, with the increase phases being characterized by high monthly asymptotic population growth rate. Snowshoe hares experienced short stage-specific generation time during the early breeding season across all phases; they experienced relatively long generation time during the increase and low phase of the mid-breeding season, and the increase and peak phase of the late breeding season.
  5. Elasticity analyses showed that asymptotic population growth rate was proportionately most sensitive to changes in survival of adult females across all phases and seasons. However, retrospective life table response experiment analysis showed that rapid growth of the snowshoe hare populations during the increase phase was due to improvements in reproductive transitions and pre-weaning survival, whereas population declines are caused primarily by reduced survival (primarily, pre-weaning survival), with reduced reproductive transitions and smaller litter sizes playing a secondary role.
  6. Our results suggest that cyclic populations of snowshoe hares are characterized by complex demographic and population-dynamic patterns, depending on phase of the cycle and reproductive season, and that different demographic mechanisms underlie rapid population growth during the increase phase, and swift population declines as the population transitions from the peak to the decline phase. Because our study represents the first comprehensive demographic and population-dynamic study of a cyclic population, similar studies would be needed to test the generalities of our conclusions. Whereas density-dependent predation has been shown to be the primary cause of phase-related changes in survival, future research should focus on identifying mechanisms underlying phase-related changes in reproductive parameters.
","language":"English","publisher":"British Ecological Society","doi":"10.1111/1365-2656.70169","usgsCitation":"Oli, M., Kenney, A.J., Boonstra, R., Boutin, S., Murray, D., Jung, T., Hines, J.E., and Krebs, C., 2026, Demographic mechanisms of snowshoe hare population cycles in Yukon, Canada: Journal of Animal Ecology, v. 95, no. 1, p. 21-38, https://doi.org/10.1111/1365-2656.70169.","productDescription":"18 p.","startPage":"21","endPage":"38","ipdsId":"IP-172112","costCenters":[{"id":50464,"text":"Eastern Ecological Science Center","active":true,"usgs":true}],"links":[{"id":498834,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Canada","state":"Yukon","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -140.9400718299732,\n 69.8062004406541\n ],\n [\n -141.019076363196,\n 60.33570031084318\n ],\n [\n -138.83560491443717,\n 60.14159250940736\n ],\n [\n -123.79814159038987,\n 60.023363477181476\n ],\n [\n -124.69952661660894,\n 61.1513424859549\n ],\n [\n -126.77625083819495,\n 60.94315027125572\n ],\n [\n -130.50198375940147,\n 63.86278204053164\n ],\n [\n -132.5453799160344,\n 65.20621371936573\n ],\n [\n -132.51008279551598,\n 66.06374914289063\n ],\n [\n -133.6821615156545,\n 66.27096365817678\n ],\n [\n -133.8993162710563,\n 66.95600944851316\n ],\n [\n -136.16958990873138,\n 67.10093721619617\n ],\n [\n -136.4898216968826,\n 69.58171511005943\n ],\n [\n -140.9400718299732,\n 69.8062004406541\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"95","issue":"1","noUsgsAuthors":false,"publicationDate":"2025-11-20","publicationStatus":"PW","contributors":{"authors":[{"text":"Oli, Madan K.","contributorId":352359,"corporation":false,"usgs":false,"family":"Oli","given":"Madan K.","affiliations":[{"id":84187,"text":"Department of Wildlife Ecology and Conservation, Newins-Zeigler Hall, University of Florida, Gainesville, FL 32611","active":true,"usgs":false}],"preferred":false,"id":954220,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kenney, Alice J","contributorId":223008,"corporation":false,"usgs":false,"family":"Kenney","given":"Alice","email":"","middleInitial":"J","affiliations":[],"preferred":false,"id":954221,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Boonstra, Rudy","contributorId":304127,"corporation":false,"usgs":false,"family":"Boonstra","given":"Rudy","affiliations":[{"id":65976,"text":"Department of Biological Sciences, University of Toronto Scarborough","active":true,"usgs":false}],"preferred":false,"id":954222,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Boutin, Stan","contributorId":223010,"corporation":false,"usgs":false,"family":"Boutin","given":"Stan","email":"","affiliations":[],"preferred":false,"id":954223,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Murray, Dennis","contributorId":195717,"corporation":false,"usgs":false,"family":"Murray","given":"Dennis","affiliations":[],"preferred":false,"id":954224,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Jung, Thomas","contributorId":221306,"corporation":false,"usgs":false,"family":"Jung","given":"Thomas","affiliations":[{"id":33063,"text":"Yukon Department of Environment","active":true,"usgs":false}],"preferred":false,"id":954225,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Hines, James E. 0000-0001-5478-7230 jhines@usgs.gov","orcid":"https://orcid.org/0000-0001-5478-7230","contributorId":146530,"corporation":false,"usgs":true,"family":"Hines","given":"James","email":"jhines@usgs.gov","middleInitial":"E.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":true,"id":954226,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Krebs, Charles J","contributorId":146456,"corporation":false,"usgs":false,"family":"Krebs","given":"Charles J","affiliations":[{"id":16701,"text":"Dept. of Zoology, University of British Columbia, Vancouver","active":true,"usgs":false}],"preferred":false,"id":954227,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ,{"id":70273676,"text":"70273676 - 2026 - Revised length categories and standard weight equation for Northern Pikeminnow","interactions":[],"lastModifiedDate":"2026-02-09T16:26:34.310994","indexId":"70273676","displayToPublicDate":"2025-11-19T07:58:06","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2886,"text":"North American Journal of Fisheries Management","active":true,"publicationSubtype":{"id":10}},"title":"Revised length categories and standard weight equation for Northern Pikeminnow","docAbstract":"

Objective

Length and weight indices (e.g., proportional size distribution, relative weight) provide standardized benchmarks that are useful for comparing groups of fish, identifying ecological interactions, and evaluating the effect of management actions. However, the current length categories and standard weight (Ws) equation for Northern Pikeminnow Ptychocheilus oregonensis, a species of important management focus in the Pacific Northwest, were developed using limited data, unclear methods, and no validation. As such, we sought to revise the length categories and Ws equation for Northern Pikeminnow.

Methods

We used the all-tackle world record to develop length categories for Northern Pikeminnow. We compiled data from 100,663 Northern Pikeminnow from 114 populations in Idaho, Montana, Oregon, Washington, and British Columbia to develop a revised Ws equation. Most fish were measured in fork length (FL), so we converted total lengths (TLs) to FLs using the equation TL = −2.301 + 0.916(FL); r2 = 0.998. We used the regression line percentile, linear empirical percentile (EmP), and quadratic EmP methods to develop 50th percentile and 75th percentile Ws equations. We then assessed length-related biases in our Ws equations and the previously published equation.

Results

We propose minimum FLs of 17 cm (7 inches; stock), 26 cm (10 inches; quality), 35 cm (14 inches; preferred), 41 cm (16 inches; memorable), and 51 cm (20 inches; trophy) for proportional size distribution calculations. The previously published Ws equation exhibited substantial length-related biases according to the Willis and weighted empirical quartile method tests. The EmP 50th-percentile Ws equation was the only equation that we evaluated that did not exhibit length-related bias. The EmP 50th-percentile Ws equation was the best performing equation (i.e., no length-related bias detected). The equation is log10(Ws) = −5.258 + 3.135(FL), where Ws is in grams and FL is in millimeters. The equation is valid for Northern Pikeminnow 90–580 mm FL.

Conclusion

The length categories, length conversion, and Ws equation presented here will aid fisheries professionals in the study and management of Northern Pikeminnow populations.

","language":"English","publisher":"Oxford Academic","doi":"10.1093/najfmt/vqaf098","usgsCitation":"Voss, N.S., and Quist, M.C., 2026, Revised length categories and standard weight equation for Northern Pikeminnow: North American Journal of Fisheries Management, v. 46, no. 1, p. 259-268, https://doi.org/10.1093/najfmt/vqaf098.","productDescription":"10 p.","startPage":"259","endPage":"268","ipdsId":"IP-177544","costCenters":[{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true}],"links":[{"id":498831,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Canada, United States","state":"British Columbia, Idaho, Montana, Oregon Washington","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -138.4324395813577,\n 59.93550068574072\n ],\n [\n -124.59147799532579,\n 48.218313763848954\n ],\n [\n -124.44719667247625,\n 42.02251544705595\n ],\n [\n -111.25221612249314,\n 42.02213493751374\n ],\n [\n -111.51121202805528,\n 44.67068539388384\n ],\n [\n -104.24225388242749,\n 45.10223423645201\n ],\n [\n -103.92744104084073,\n 48.83423714465319\n ],\n [\n -113.58199201609347,\n 49.298105422493\n ],\n [\n -118.8005677418272,\n 53.905347228735906\n ],\n [\n -119.63389382864163,\n 59.938025103368716\n ],\n [\n -138.4324395813577,\n 59.93550068574072\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"46","issue":"1","noUsgsAuthors":false,"publicationDate":"2025-11-19","publicationStatus":"PW","contributors":{"authors":[{"text":"Voss, Nicholas S.","contributorId":241654,"corporation":false,"usgs":false,"family":"Voss","given":"Nicholas","middleInitial":"S.","affiliations":[{"id":48382,"text":"KBR, Albuquerque Seismological Laboratory","active":true,"usgs":false}],"preferred":false,"id":954283,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Quist, Michael C. 0000-0001-8268-1839","orcid":"https://orcid.org/0000-0001-8268-1839","contributorId":207142,"corporation":false,"usgs":true,"family":"Quist","given":"Michael","middleInitial":"C.","affiliations":[{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true}],"preferred":true,"id":954284,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70272762,"text":"70272762 - 2026 - Phylogenomics of endangered troglobiotic rove beetles (Coleoptera: Staphylinidae: Pselaphinae) from central Texas karst regions","interactions":[],"lastModifiedDate":"2025-12-09T14:19:48.043829","indexId":"70272762","displayToPublicDate":"2025-11-18T08:45:24","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1324,"text":"Conservation Genetics","active":true,"publicationSubtype":{"id":10}},"title":"Phylogenomics of endangered troglobiotic rove beetles (Coleoptera: Staphylinidae: Pselaphinae) from central Texas karst regions","docAbstract":"

The karst habitats of central Texas, USA, are home to an array of endemic subterranean-obligate (troglobiotic) invertebrates. This includes several species of rove beetles (Coleoptera: Staphylinidae: Pselaphinae). Here we developed a molecular dataset using sequence capture of Ultra-Conserved Elements (UCEs) from the Coleoptera-UCE-1.1 K v1 baits kit. These data were used to assess species relationships and patterns of diversification in this group, specifically among species within the genera Batrisodes Reitter 1882 and Texamaurops Barr and Steeves 1963; with a specific focus on the relationships of the federally listed as endangered B. texanus Chandler 1992 and B.cryptotexanus Chandler and Reddell 2001. Our final datasets consisted of 69 individuals (two genera, Batrisodes [five species] and Texamaurops [one species], from 34 localities), and a molecular dataset of 658,560 aligned base pairs across 672 UCE loci. Concatenated and species-tree phylogenetic analyses resolved all troglobiotic taxa as a monophyletic group. Within the Travis and Williamson County troglobionts, we recovered four well-supported clades that generally follow hypothesized geologic barriers to dispersal formalized as karst fauna regions (KFRs). A northward pattern of diversification was observed among these groups: (A) Texamaurops reddelli Barr and Steeves 1963 (Jollyville Plateau KFR); (B) Batrisodes reyesi Chandler 1997 (West Cedar Park and Post Oak Ridge KFRs); (C) B. reyesi (McNeil-Round Rock KFR); (D) B. cryptotexanus + B. texanus (Georgetown and North Williamson KFRs). The morphologically defined Batrisodes texanus and B. cryptotexanus were not reciprocally monophyletic, nor clustered into two unique groups in clustering analyses of single nucleotide polymorphisms (SNPs). Rather, we found support for five major subclades and five to seven genetic clusters. These results suggest that diversification and subsequent isolation of clades may have occurred with the progressive availability of karst habitats over time in the North Williamson and Georgetown KFRs resulting from the interactions of faulting, geologic structure, and drainage basin evolution. Comparison with recent U.S. Fish and Wildlife Service cave habitat resiliency assessments indicated that four genetic clusters occur within at least partially resilient habitat, whereas three are confined to caves with low or impaired resiliency. Integrating genetic results presented here along with results of other molecular studies of co-occurring troglobiotic invertebrates supports considering additional geological substructure within the North Williamson KFR in conservation efforts for these rare and unique lineages and systems.

","language":"English","publisher":"Springer Nature","doi":"10.1007/s10592-025-01733-y","usgsCitation":"Wood, P.L., Chandler, D.S., Gladstone, N.S., Mitelberg, A., Smith, J.G., White, K., Wilson, J., and Vandergast, A.G., 2026, Phylogenomics of endangered troglobiotic rove beetles (Coleoptera: Staphylinidae: Pselaphinae) from central Texas karst regions: Conservation Genetics, v. 27, 6, 17 p., https://doi.org/10.1007/s10592-025-01733-y.","productDescription":"6, 17 p.","ipdsId":"IP-180017","costCenters":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"links":[{"id":497406,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1007/s10592-025-01733-y","text":"Publisher Index Page"},{"id":497192,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Texas","otherGeospatial":"central Texas","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -98.73468272013145,\n 32.73358466173568\n ],\n [\n -98.73468272013145,\n 30.565934073926556\n ],\n [\n -96.59794469143151,\n 30.565934073926556\n ],\n [\n -96.59794469143151,\n 32.73358466173568\n ],\n [\n -98.73468272013145,\n 32.73358466173568\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"27","noUsgsAuthors":false,"publicationDate":"2025-11-18","publicationStatus":"PW","contributors":{"authors":[{"text":"Wood, Perry L. Jr. 0000-0003-3767-5274","orcid":"https://orcid.org/0000-0003-3767-5274","contributorId":363405,"corporation":false,"usgs":true,"family":"Wood","given":"Perry","suffix":"Jr.","middleInitial":"L.","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":951627,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chandler, Donald S.","contributorId":363406,"corporation":false,"usgs":false,"family":"Chandler","given":"Donald","middleInitial":"S.","affiliations":[{"id":12667,"text":"University of New Hampshire","active":true,"usgs":false}],"preferred":false,"id":951628,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gladstone, Nicholas S.","contributorId":363407,"corporation":false,"usgs":false,"family":"Gladstone","given":"Nicholas","middleInitial":"S.","affiliations":[{"id":6654,"text":"USFWS","active":true,"usgs":false}],"preferred":false,"id":951629,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Mitelberg, Anna 0000-0002-3309-9946 amitelberg@usgs.gov","orcid":"https://orcid.org/0000-0002-3309-9946","contributorId":218945,"corporation":false,"usgs":true,"family":"Mitelberg","given":"Anna","email":"amitelberg@usgs.gov","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":951630,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Smith, Julia G. 0000-0001-9841-1809","orcid":"https://orcid.org/0000-0001-9841-1809","contributorId":221086,"corporation":false,"usgs":true,"family":"Smith","given":"Julia","email":"","middleInitial":"G.","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":951631,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"White, Kemble","contributorId":363408,"corporation":false,"usgs":false,"family":"White","given":"Kemble","affiliations":[{"id":86694,"text":"Cambrian Environmental","active":true,"usgs":false}],"preferred":false,"id":951632,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Wilson, Jenny","contributorId":363409,"corporation":false,"usgs":false,"family":"Wilson","given":"Jenny","affiliations":[{"id":6654,"text":"USFWS","active":true,"usgs":false}],"preferred":false,"id":951633,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Vandergast, Amy G. 0000-0002-7835-6571","orcid":"https://orcid.org/0000-0002-7835-6571","contributorId":57201,"corporation":false,"usgs":true,"family":"Vandergast","given":"Amy","middleInitial":"G.","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":951634,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ,{"id":70272599,"text":"70272599 - 2026 - Population demographics of invasive Silver Carp in a Great Plains river network","interactions":[],"lastModifiedDate":"2026-02-09T16:10:02.36101","indexId":"70272599","displayToPublicDate":"2025-11-17T08:22:27","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2886,"text":"North American Journal of Fisheries Management","active":true,"publicationSubtype":{"id":10}},"title":"Population demographics of invasive Silver Carp in a Great Plains river network","docAbstract":"

Objective

Knowledge of invasive Silver Carp Hypophthalmichthys molitrix population demographics and distributions may inform estimates of efforts necessary to achieve reductions in abundance and identify locations to conduct removal. Although extensively studied in other parts of their invasive range (e.g., Mississippi and Illinois rivers), less is known regarding Silver Carp population demographics in Great Plains rivers and streams. As such, this study characterized Silver Carp population demographics along an invasion gradient in a Great Plains river network containing multiple hydrologically unique river reaches and tributaries.

Methods

Boat and tote-barge electrofishing surveys were conducted within the lower Platte River basin in the spring, summer, and fall of 2022 and 2023. Lapilli otoliths were collected for assessment of age, growth, and annual mortality. Information on sex also was collected. A spatial assessment of differences in population demographics was performed between core and periphery regions of the population.

Results

There were 1,528 Silver Carp collected. A spatial difference in relative abundance was observed and was associated with changes in body condition and total length along the longitudinal gradient of the lower Platte River basin. Silver Carp sex ratios were male-skewed across the lower Platte River basin (1.6:1), particularly in reaches near the invasion front (10.1:1).

Conclusions

Silver Carp population demographics within the lower Platte River basin were aligned with an establishing population characterized by rapid individual growth and skewed sex ratios. Broadscale variation in population characteristics, including growth and size structure, suggested density-dependent processes. Silver Carp occurred throughout the study area, indicating that braided Great Plains streams are susceptible to invasion. This study provided insight into Silver Carp population demographics in the lower Platte River basin and may provide useful information for the development of Silver Carp management plans in similar Great Plains streams.

","language":"English","publisher":"Oxford Academic","doi":"10.1093/najfmt/vqaf105","usgsCitation":"Logan, B., Pegg, M., Steffensen, K.D., and Spurgeon, J.J., 2026, Population demographics of invasive Silver Carp in a Great Plains river network: North American Journal of Fisheries Management, v. 46, no. 1, p. 70-83, https://doi.org/10.1093/najfmt/vqaf105.","productDescription":"14 p.","startPage":"70","endPage":"83","ipdsId":"IP-177767","costCenters":[{"id":198,"text":"Coop Res Unit Atlanta","active":true,"usgs":true}],"links":[{"id":496833,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"46","issue":"1","noUsgsAuthors":false,"publicationDate":"2025-11-17","publicationStatus":"PW","contributors":{"authors":[{"text":"Logan, Blake","contributorId":362968,"corporation":false,"usgs":false,"family":"Logan","given":"Blake","affiliations":[{"id":81786,"text":"Nebraska Game & Parks Commission","active":true,"usgs":false}],"preferred":false,"id":950886,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pegg, Mark","contributorId":203266,"corporation":false,"usgs":false,"family":"Pegg","given":"Mark","affiliations":[{"id":16610,"text":"University of Nebraska-Lincoln","active":true,"usgs":false}],"preferred":false,"id":950887,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Steffensen, Kirk D.","contributorId":196924,"corporation":false,"usgs":false,"family":"Steffensen","given":"Kirk","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":950888,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Spurgeon, Jonathan J. 0000-0002-6888-5867","orcid":"https://orcid.org/0000-0002-6888-5867","contributorId":304259,"corporation":false,"usgs":true,"family":"Spurgeon","given":"Jonathan","middleInitial":"J.","affiliations":[{"id":198,"text":"Coop Res Unit Atlanta","active":true,"usgs":true}],"preferred":true,"id":950889,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70272657,"text":"70272657 - 2026 - Groundwater spatial variability within an atoll island: Assessing shallow aquifer heterogeneity with geophysical and physicochemical measurements","interactions":[],"lastModifiedDate":"2025-12-02T17:00:54.237091","indexId":"70272657","displayToPublicDate":"2025-11-10T10:52:39","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Groundwater spatial variability within an atoll island: Assessing shallow aquifer heterogeneity with geophysical and physicochemical measurements","docAbstract":"

This study examines the spatial variability of shallow groundwater on Dhigelaabadhoo Island using electromagnetic induction surveys, groundwater monitoring, and sediment analyses. The research reveals how variations in island morphology—such as differences in elevation, reef flat width, and sediment composition—affect the spatial distribution of groundwater lenses and the overall aquifer dynamics. Saltwater intrusion is especially pronounced in low elevated areas, with narrow reef flat plate and areas where higher hydraulic conductivity—driven by the presence of coarser sediments—is observed, whereas regions characterized by finer sediments, higher elevation, and wider reef flat plates tend to support more symmetric and less saline groundwater lenses. The geophysical investigations reveal that tidal oscillations alter groundwater movement by markedly changing water levels and conductivity, thereby underscoring the critical need to account for temporal dynamics in atoll coastal aquifer systems and the importance of integrating tidal dynamics into the aquifer zone. The findings highlight the significant role of intrinsic morphological and external hydrodynamic factors in shaping groundwater distribution on atoll islands, offering critical insights for sustainable freshwater resource management.

","language":"English","publisher":"Elsevier","doi":"10.1016/j.jhydrol.2025.134560","usgsCitation":"Tobon-Velazquez, N., Masselink, G., O’Hare, T., Bates, R., Oberle, F., Storlazzi, C.D., and Conley, D.C., 2026, Groundwater spatial variability within an atoll island: Assessing shallow aquifer heterogeneity with geophysical and physicochemical measurements: Journal of Hydrology, v. 664, no. Part C, 134560, 12 p., https://doi.org/10.1016/j.jhydrol.2025.134560.","productDescription":"134560, 12 p.","ipdsId":"IP-179435","costCenters":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":497086,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1016/j.jhydrol.2025.134560","text":"Publisher Index Page"},{"id":496997,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Maldives","otherGeospatial":"Dhigelaabadhoo Island","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n 73.15068157166235,\n 0.22367037148083568\n ],\n [\n 73.15068157166235,\n 0.20321725337372243\n ],\n [\n 73.16693210711523,\n 0.20321725337372243\n ],\n [\n 73.16693210711523,\n 0.22367037148083568\n ],\n [\n 73.15068157166235,\n 0.22367037148083568\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"664","issue":"Part C","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Tobon-Velazquez, Nidia","contributorId":363182,"corporation":false,"usgs":false,"family":"Tobon-Velazquez","given":"Nidia","affiliations":[{"id":86638,"text":"U.Plymouth","active":true,"usgs":false}],"preferred":false,"id":951226,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Masselink, Gerd","contributorId":224307,"corporation":false,"usgs":false,"family":"Masselink","given":"Gerd","email":"","affiliations":[{"id":40854,"text":"UP","active":true,"usgs":false}],"preferred":false,"id":951227,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"O’Hare, T.J.","contributorId":363183,"corporation":false,"usgs":false,"family":"O’Hare","given":"T.J.","affiliations":[{"id":86638,"text":"U.Plymouth","active":true,"usgs":false}],"preferred":false,"id":951228,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bates, Robert","contributorId":363184,"corporation":false,"usgs":false,"family":"Bates","given":"Robert","affiliations":[{"id":86639,"text":"U.St.Andrews","active":true,"usgs":false}],"preferred":false,"id":951229,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Oberle, Ferdinand 0000-0001-8871-3619","orcid":"https://orcid.org/0000-0001-8871-3619","contributorId":219183,"corporation":false,"usgs":true,"family":"Oberle","given":"Ferdinand","affiliations":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":951230,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Storlazzi, Curt D. 0000-0001-8057-4490","orcid":"https://orcid.org/0000-0001-8057-4490","contributorId":213610,"corporation":false,"usgs":true,"family":"Storlazzi","given":"Curt","middleInitial":"D.","affiliations":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":951231,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Conley, D. C.","contributorId":363186,"corporation":false,"usgs":false,"family":"Conley","given":"D.","middleInitial":"C.","affiliations":[],"preferred":false,"id":951232,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70272719,"text":"70272719 - 2026 - Variation in soil organic carbon across a latitudinal chronosequence of mangrove poleward expansion","interactions":[],"lastModifiedDate":"2025-12-05T16:10:48.459229","indexId":"70272719","displayToPublicDate":"2025-11-10T10:03:52","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1478,"text":"Ecosystems","active":true,"publicationSubtype":{"id":10}},"title":"Variation in soil organic carbon across a latitudinal chronosequence of mangrove poleward expansion","docAbstract":"

The critical carbon sink provided by coastal wetlands, known as blue carbon, can be affected by multiple aspects of climate change. One important example is warming-induced mangrove poleward expansion, which is shifting dominant plant cover across tropical–temperate transitional zones and altering ecosystem structure and function. We examined how mangrove expansion affects soil organic carbon (SOC) quantity and source, using measurements of SOC density and isotopic signatures (δ13C and δ15N) at 15 sites across Florida’s west coast (USA). The sampled sites represent examples of three expansion stages: a latitudinal chronosequence of mangrove expansion, spanning mature mangroves in the south, former ecotones at mid latitudes, and current ecotones in the north. Our analyses of soil core data indicate that mangrove expansion stage is a significant predictor of SOC density, δ13C, and δ15N, but not C:N ratio. Current ecotones exhibited significantly lower SOC density but higher δ13C, suggesting a greater contribution of preexisting C4 salt marshes, while no difference was found between former ecotones and mature mangroves. SOC density, δ13C, and δ15N were found to vary with mangrove aboveground biomass, stage, and sedimentary setting along the latitudinal gradient. For all three mangrove expansion stages, SOC density decreased with depth, but δ13C showed no vertical trend, suggesting that mangroves contributed organic carbon to the entire 20-cm soil profile. The observed regional trend of SOC across mangrove expansion stages highlights the ecological impacts of warming-driven vegetation shifts in coastal wetlands, though further evidence is needed to determine the primary drivers and mechanisms, while also considering local and regional environmental factors.

","language":"English","publisher":"Springer","doi":"10.1007/s10021-025-01021-3","usgsCitation":"Kang, Y., Assavapanuvat, P., Osland, M., and Kaplan, D.A., 2026, Variation in soil organic carbon across a latitudinal chronosequence of mangrove poleward expansion: Ecosystems, v. 29, no. 1, 2, 16 p., https://doi.org/10.1007/s10021-025-01021-3.","productDescription":"2, 16 p.","ipdsId":"IP-177314","costCenters":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"links":[{"id":497146,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Florida","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -81.32160751894271,\n 25.054902179361207\n ],\n [\n -80.63726301014596,\n 25.258298250546616\n ],\n [\n -81.8527400049156,\n 27.227832172418474\n ],\n [\n -82.33280191711681,\n 28.84154022988217\n ],\n [\n -83.06821596269705,\n 29.7501155011185\n ],\n [\n -84.31432949640975,\n 30.536225351129545\n ],\n [\n -84.93739349566832,\n 30.13070589776649\n ],\n [\n -85.98944614179287,\n 30.421797338238022\n ],\n [\n -86.25501595921092,\n 30.342496828735193\n ],\n [\n -85.20296443450356,\n 29.55483610748952\n ],\n [\n -84.09984046033792,\n 29.989262856477296\n ],\n [\n -82.94564883333466,\n 28.859434680310557\n ],\n [\n -83.07843222809143,\n 27.699106909720854\n ],\n [\n -81.32160751894271,\n 25.054902179361207\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"29","issue":"1","noUsgsAuthors":false,"publicationDate":"2025-11-10","publicationStatus":"PW","contributors":{"authors":[{"text":"Kang, Yiyang","contributorId":305365,"corporation":false,"usgs":false,"family":"Kang","given":"Yiyang","email":"","affiliations":[{"id":36221,"text":"University of Florida","active":true,"usgs":false}],"preferred":false,"id":951430,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Assavapanuvat, Prakhin","contributorId":363279,"corporation":false,"usgs":false,"family":"Assavapanuvat","given":"Prakhin","affiliations":[{"id":36221,"text":"University of Florida","active":true,"usgs":false}],"preferred":false,"id":951431,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Osland, Michael J. 0000-0001-9902-8692","orcid":"https://orcid.org/0000-0001-9902-8692","contributorId":206443,"corporation":false,"usgs":true,"family":"Osland","given":"Michael","middleInitial":"J.","affiliations":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"preferred":true,"id":951432,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kaplan, David A.","contributorId":363282,"corporation":false,"usgs":false,"family":"Kaplan","given":"David","middleInitial":"A.","affiliations":[{"id":36221,"text":"University of Florida","active":true,"usgs":false}],"preferred":false,"id":951433,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70272143,"text":"70272143 - 2026 - Refined chronology of late Quaternary eruptions at Harrat Khaybar, Saudi Arabia, with implications for magma dynamics and regional volcanic history","interactions":[],"lastModifiedDate":"2026-03-09T14:33:25.048727","indexId":"70272143","displayToPublicDate":"2025-11-05T08:00:19","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1723,"text":"GSA Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Refined chronology of late Quaternary eruptions at Harrat Khaybar, Saudi Arabia, with implications for magma dynamics and regional volcanic history","docAbstract":"

Determining accurate and precise ages for Quaternary volcanic centers is essential for reconstructing volcanic field histories, understanding magmatic processes, and assessing potential hazards or risk. Harrat Khaybar, western Saudi Arabia, is one of the youngest and potentially most active volcanic fields on the Arabian plate, has been active since ca. 1.7 Ma, and is characterized by a spectrum of rock compositions ranging from predominantly alkalic basalt to trachyte and comendite. Previous work in Harrat Khaybar utilizing 40Ar/39Ar incremental heating geochronology to constrain morphological preservation and superpositional relationships bracketed the volcanic activity into broad age groups in intervals of ∼150 k.y., and the youngest and most compositionally evolved volcanoes, including Jabal Abyad, Jabal Bayda, and Jabal Qidr, were assigned to the age groups between ca. 300 ka and present. Herein, we establish a detailed chronology of prehistoric silicic and historical basaltic eruptions at central Harrat Khaybar using four independent eruption age determination techniques: zircon double-dating (ZDD), which combines 238U-230Th disequilibrium or U-Pb with (U-Th)/He dating; zircon U-Pb dating; cosmogenic 3He dating; and cosmogenic 36Cl geochronology. These were employed to accurately date six volcanic centers, including the comenditic Jabal Abyad, Jabal Bayda, Jabal Ibayl, and Jabal Alhayyirah, the trachytic Jabal Aluthmor, and the basaltic Jabal Qidr. Additionally, our previously published 40Ar/39Ar ages have been recalculated using isochron intercept (nonatmospheric) 40Ar/36Ar for the trapped Ar component. Our new results reveal that zircon rims from Jabal Abyad and Jabal Bayda define isochron 238U-230Th crystallization ages of 125 ± 4 ka and 144 ± 6 ka, concordant with ZDD eruption ages of 132 ± 4 ka and 149 ± 5 ka, respectively. Zircon U-Pb crystallization and (U-Th)/He eruption ages from Jabal Alhayyirah are concordant at 471 ± 14 ka and 458 ± 18 ka, respectively. Finally, zircons from the nearby Jabal Ibayl yield a U-Pb weighted mean crystallization age of 566 ± 16 ka concordant with the corresponding (U-Th)/He eruption age of 554 ± 12 ka, both of which are notably older than the previously proposed eruption ages of 300−150 ka. Recalculations of published 40Ar/39Ar ages for the youngest volcanoes at central Harrat Khaybar are now in excellent agreement with new geochronological data.

Our new age data reveal several new insights into the development of Harrat Khaybar. It is now clear that the comenditic eruptions do not belong to the same eruptive phase and indicate an extended history during which comendites have episodically punctuated the basaltic volcanism since at least 600 ka. The data indicate that Jabal Ibayl and Jabal Alhayyirah represent separate older volcanic events, whereas the younger Jabal Abyad and Jabal Bayda volcanoes appear to be coeval, and their spatial proximity implies that they share a magmatic lineage and maybe a common plumbing system. Zircon age spectra of the comendites reveal obvious xenocrysts and antecrysts indicating assimilation of basement and plutonic progenitors, but otherwise they define broad unimodal populations of crystallization ages that overlap within error with the respective eruption ages. We interpret this to indicate that zircon crystallization continued up to the time of eruption. The cosmogenic ages of Jabal Aluthmor and Jabal Qidr reveal that these centers erupted as recently as ca. 2000 and 760 years ago, respectively. Broadly coeval young silicic and basaltic eruptions at northern Harrat Rahat, the harrat immediately south of Harrat Khaybar, may imply a shared geodynamic forcing between the two adjacent volcanic fields.

","language":"English","publisher":"GeoScienceWorld","doi":"10.1130/B38611.1","usgsCitation":"Aohali, A., de Silva, S.L., de Leon, A., Lewis, C., Schmitt, A.K., Danišík, M., Stelten, M.E., Mukhopadhyay, S., Duncan, R., and Ramos, F.C., 2026, Refined chronology of late Quaternary eruptions at Harrat Khaybar, Saudi Arabia, with implications for magma dynamics and regional volcanic history: GSA Bulletin, 20 p., https://doi.org/10.1130/B38611.1.","productDescription":"20 p.","ipdsId":"IP-179667","costCenters":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"links":[{"id":496536,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Saudi Arabia","otherGeospatial":"Harrat Khaybar","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n 32.85295692715516,\n 31.09037520506034\n ],\n [\n 32.4913950501539,\n 29.629285602110514\n ],\n [\n 42.48408268197696,\n 16.295959844508005\n ],\n [\n 44.73156011376457,\n 17.35801132821274\n ],\n [\n 44.40883286040667,\n 19.46824225247422\n ],\n [\n 45.04342709873005,\n 21.136426902843187\n ],\n [\n 43.12386232882824,\n 25.38842500405898\n ],\n [\n 39.48524523909565,\n 28.58924888259447\n ],\n [\n 37.25829032269033,\n 29.051927055631452\n ],\n [\n 32.85295692715516,\n 31.09037520506034\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","edition":"Online First","noUsgsAuthors":false,"publicationDate":"2025-11-05","publicationStatus":"PW","contributors":{"authors":[{"text":"Aohali, Abdullah","contributorId":362243,"corporation":false,"usgs":false,"family":"Aohali","given":"Abdullah","affiliations":[{"id":6680,"text":"Oregon State University","active":true,"usgs":false}],"preferred":false,"id":950211,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"de Silva, Shanaka L. 0000-0002-0310-5516","orcid":"https://orcid.org/0000-0002-0310-5516","contributorId":242616,"corporation":false,"usgs":false,"family":"de Silva","given":"Shanaka","email":"","middleInitial":"L.","affiliations":[{"id":6680,"text":"Oregon State University","active":true,"usgs":false}],"preferred":false,"id":950212,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"de Leon, Alejandro Cisneros 0000-0002-0133-2838","orcid":"https://orcid.org/0000-0002-0133-2838","contributorId":362244,"corporation":false,"usgs":false,"family":"de Leon","given":"Alejandro Cisneros","affiliations":[{"id":6680,"text":"Oregon State University","active":true,"usgs":false}],"preferred":false,"id":950213,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lewis, Charles","contributorId":362245,"corporation":false,"usgs":false,"family":"Lewis","given":"Charles","affiliations":[{"id":6680,"text":"Oregon State University","active":true,"usgs":false}],"preferred":false,"id":950214,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Schmitt, Axel K.","contributorId":362246,"corporation":false,"usgs":false,"family":"Schmitt","given":"Axel","middleInitial":"K.","affiliations":[{"id":13639,"text":"Curtin University","active":true,"usgs":false}],"preferred":false,"id":950215,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Danišík, Martin","contributorId":362247,"corporation":false,"usgs":false,"family":"Danišík","given":"Martin","affiliations":[{"id":13639,"text":"Curtin University","active":true,"usgs":false}],"preferred":false,"id":950216,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Stelten, Mark E. 0000-0002-5294-3161 mstelten@usgs.gov","orcid":"https://orcid.org/0000-0002-5294-3161","contributorId":145923,"corporation":false,"usgs":true,"family":"Stelten","given":"Mark","email":"mstelten@usgs.gov","middleInitial":"E.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":950217,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Mukhopadhyay, Sujoy","contributorId":362248,"corporation":false,"usgs":false,"family":"Mukhopadhyay","given":"Sujoy","affiliations":[{"id":6607,"text":"Arizona State University","active":true,"usgs":false}],"preferred":false,"id":950218,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Duncan, Robert","contributorId":362249,"corporation":false,"usgs":false,"family":"Duncan","given":"Robert","affiliations":[{"id":6680,"text":"Oregon State University","active":true,"usgs":false}],"preferred":false,"id":950219,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Ramos, Frank C.","contributorId":362250,"corporation":false,"usgs":false,"family":"Ramos","given":"Frank","middleInitial":"C.","affiliations":[{"id":12628,"text":"New Mexico State University","active":true,"usgs":false}],"preferred":false,"id":950220,"contributorType":{"id":1,"text":"Authors"},"rank":10}]}} ,{"id":70273458,"text":"70273458 - 2026 - Same view through a different lens: Comparing population trends for North American birds using eBird and the Breeding Bird Survey","interactions":[],"lastModifiedDate":"2026-03-09T14:44:05.324035","indexId":"70273458","displayToPublicDate":"2025-11-05T07:56:41","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":9101,"text":"Ornithological Applications","printIssn":"0010-5422","active":true,"publicationSubtype":{"id":10}},"title":"Same view through a different lens: Comparing population trends for North American birds using eBird and the Breeding Bird Survey","docAbstract":"

Confidently estimating population trends is of vital importance for a wide range of ecological, conservation, and management applications. North America has 2 major data sources for estimating population trends of breeding birds—the North American Breeding Bird Survey (BBS) and the global participatory science project eBird. Because the surveys differ in protocols, coverage, and data analysis, their trend estimates are expected to vary in magnitude, direction, and/or precision for at least some species and regions. Here, we compare independently derived estimates of population change between 2012 and 2022 for every combination of species and bird conservation region (BCR) covered by both surveys (n = 5,577 combinations) as well as aggregated across entire ranges or within the U.S. or Canada. Uncertainty was substantial for both surveys, though more prevalent for BBS (81% of credibility intervals for estimates included zero) than eBird (34% of confidence intervals overlapped zero). We found agreement of trend directions between the 2 surveys. Only 1.3% of estimated trends were significant in opposite directions between the 2 surveys for all species/BCR combinations, with the median difference in trend magnitude being –0.02% (BBS minus eBird trend). Correlations between the 2 were strongest for estimates that were graded as being high credibility compared to estimates judged to have medium or low credibility. Both surveys were subject to species, taxonomic, and regional effects that influenced agreement. Overall, we show where trend estimates derived from BBS and eBird agree, explore where they diverge, present several comparisons to assist in interpreting results from both surveys, and inform efforts to integrate information from each.

","language":"English","publisher":"Oxford Academic","doi":"10.1093/ornithapp/duaf077","usgsCitation":"Robinson, O.J., Johnston, A.J., Hochachka, W.M., Hostetler, J.A., Sauer, J.R., Auer, T., Strimas-Mackey, M.E., Ligocki, S., Faraco-Hadlock, N.A., Ruiz-Gutierrez, V., Rodewald, A.D., and Fink, D., 2026, Same view through a different lens: Comparing population trends for North American birds using eBird and the Breeding Bird Survey: Ornithological Applications, v. 128, no. 1, p. 1-14, https://doi.org/10.1093/ornithapp/duaf077.","productDescription":"14 p.","startPage":"1","endPage":"14","ipdsId":"IP-177306","costCenters":[{"id":50464,"text":"Eastern Ecological Science Center","active":true,"usgs":true}],"links":[{"id":498606,"rank":1,"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 -175.5769656031165,\n 67.88007213476573\n ],\n [\n -176.42265817434867,\n 52.09754159577638\n ],\n [\n -135.3326753777096,\n 55.172434116597884\n ],\n [\n -120.43638889508058,\n 32.147432273276934\n ],\n [\n -76.5966100414586,\n 24.358972522659556\n ],\n [\n -50.64255884378724,\n 46.04534849315602\n ],\n [\n -60.903583596490165,\n 62.58237847273696\n ],\n [\n -117.88795050621641,\n 71.73176576156126\n ],\n [\n -152.156676231909,\n 72.85004301491678\n ],\n [\n -175.5769656031165,\n 67.88007213476573\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"128","issue":"1","noUsgsAuthors":false,"publicationDate":"2025-11-05","publicationStatus":"PW","contributors":{"authors":[{"text":"Robinson, Orin J.","contributorId":220077,"corporation":false,"usgs":false,"family":"Robinson","given":"Orin","middleInitial":"J.","affiliations":[{"id":13360,"text":"Auburn University","active":true,"usgs":false}],"preferred":false,"id":953770,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Johnston, Alison J.","contributorId":365147,"corporation":false,"usgs":false,"family":"Johnston","given":"Alison","middleInitial":"J.","affiliations":[{"id":87068,"text":"University of St Andrews, St Andrews, UK","active":true,"usgs":false}],"preferred":false,"id":953771,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hochachka, Wesley M.","contributorId":365148,"corporation":false,"usgs":false,"family":"Hochachka","given":"Wesley","middleInitial":"M.","affiliations":[{"id":36682,"text":"Cornell Lab of Ornithology","active":true,"usgs":false}],"preferred":false,"id":953772,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hostetler, J. A. 0000-0003-3669-1758","orcid":"https://orcid.org/0000-0003-3669-1758","contributorId":11319,"corporation":false,"usgs":true,"family":"Hostetler","given":"J.","middleInitial":"A.","affiliations":[],"preferred":true,"id":953773,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Sauer, John R. 0000-0002-4557-3019 jrsauer@usgs.gov","orcid":"https://orcid.org/0000-0002-4557-3019","contributorId":146917,"corporation":false,"usgs":true,"family":"Sauer","given":"John","email":"jrsauer@usgs.gov","middleInitial":"R.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":true,"id":953774,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Auer, Tom","contributorId":365149,"corporation":false,"usgs":false,"family":"Auer","given":"Tom","affiliations":[{"id":36682,"text":"Cornell Lab of Ornithology","active":true,"usgs":false}],"preferred":false,"id":953775,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Strimas-Mackey, Matthew E.","contributorId":365150,"corporation":false,"usgs":false,"family":"Strimas-Mackey","given":"Matthew","middleInitial":"E.","affiliations":[{"id":36682,"text":"Cornell Lab of Ornithology","active":true,"usgs":false}],"preferred":false,"id":953776,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Ligocki, Shawn","contributorId":365151,"corporation":false,"usgs":false,"family":"Ligocki","given":"Shawn","affiliations":[{"id":36682,"text":"Cornell Lab of Ornithology","active":true,"usgs":false}],"preferred":false,"id":953777,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Faraco-Hadlock, Nicholas A.","contributorId":365152,"corporation":false,"usgs":false,"family":"Faraco-Hadlock","given":"Nicholas","middleInitial":"A.","affiliations":[{"id":36682,"text":"Cornell Lab of Ornithology","active":true,"usgs":false}],"preferred":false,"id":953778,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Ruiz-Gutierrez, Viviana","contributorId":338363,"corporation":false,"usgs":false,"family":"Ruiz-Gutierrez","given":"Viviana","affiliations":[{"id":12722,"text":"Cornell University","active":true,"usgs":false}],"preferred":false,"id":953779,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Rodewald, Amanda D.","contributorId":365153,"corporation":false,"usgs":false,"family":"Rodewald","given":"Amanda","middleInitial":"D.","affiliations":[{"id":36682,"text":"Cornell Lab of Ornithology","active":true,"usgs":false}],"preferred":false,"id":953780,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Fink, Daniel","contributorId":338362,"corporation":false,"usgs":false,"family":"Fink","given":"Daniel","affiliations":[{"id":12722,"text":"Cornell University","active":true,"usgs":false}],"preferred":false,"id":953781,"contributorType":{"id":1,"text":"Authors"},"rank":12}]}} ,{"id":70273797,"text":"70273797 - 2026 - Reconciliation of geochronology and paleozoogeography for Quaternary marine terraces, San Luis Obispo Bay area, California, USA","interactions":[],"lastModifiedDate":"2026-01-30T16:41:32.315493","indexId":"70273797","displayToPublicDate":"2025-11-04T10:35:18","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2996,"text":"Palaeogeography, Palaeoclimatology, Palaeoecology","printIssn":"0031-0182","active":true,"publicationSubtype":{"id":10}},"title":"Reconciliation of geochronology and paleozoogeography for Quaternary marine terraces, San Luis Obispo Bay area, California, USA","docAbstract":"
In the San Luis Obispo Bay area of central California, interpretations of marine terrace ages have been hampered by inconsistent results from geochronological indicators (U-series ages of corals and correlations using amino acid racemization of mollusks) and seemingly contradictory paleozoogeographic aspects of fossil faunal assemblages. New U-series ages of corals, amino acid data from mollusks, and detailed analyses of fossil mollusk assemblages are presented that reconcile many of the apparently discordant results from previous studies. The two lowest-elevation terraces are Q1 (lower) and Q2 (upper); both are thought to date from high-sea stands of marine isotope stage (MIS) 5, the last interglacial complex. A combination of U-series dating and amino acid racemization results indicates that the Q1 terrace probably dates to the ∼80 ka high-sea stand of MIS 5a. U-series analyses of corals from the Q2 terrace show open-system histories, but consideration of two alternative open-system histories indicates that this terrace likely hosts corals dating to the high-sea stands of MIS 5c (∼105–95 ka) and MIS 5e (∼130–115 ka). Amino acid ratios in the fossil bivalve Leukoma staminea (Conrad, 1837) support the age differences between the two terraces and the open-system models suggested by the U-series data. Alkenone studies along much of the coast of California have shown that sea surface temperatures (SSTs) of the eastern Pacific Ocean were warmer than present during MIS 5e. During MIS 5c, on the other hand, SSTs were either similar to the present or cooler, but in either case, much cooler than during MIS 5e. The paleozoogeographic aspects of the molluscan faunas from the Q2 terrace support an interpretation that these deposits contain a mixture of fossils from both the MIS 5c and 5e high-sea stands. Fossils from the Q2 terrace include southern or southward-ranging species (likely dating to MIS 5e) and northern or northward-ranging species (likely dating to MIS 5c). A mixture of MIS 5e and MIS 5c fossils on the Q2 terrace is consistent with similar data reported for other localities in California. This phenomenon is explained by glacial isostatic adjustment (GIA) processes, which brought about a higher-than-present sea level during MIS 5c. GIA processes, combined with a low uplift rate, allowed mixing of MIS 5e fossils during the MIS 5c high-sea stand through capture of an MIS 5e terrace that had experienced minimal uplift in ∼20,000 years. Terrace reoccupation and fossil mixing such as that in the San Luis Obispo Bay area can be expected along any part of the Pacific Coast of North America that was affected by GIA processes and where uplift rates are low.
","language":"English","publisher":"Elsevier","doi":"10.1016/j.palaeo.2025.113354","usgsCitation":"Muhs, D., Groves, L.T., Schumann, R.R., and Bright, J., 2026, Reconciliation of geochronology and paleozoogeography for Quaternary marine terraces, San Luis Obispo Bay area, California, USA: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 681, 113354, 29 p., https://doi.org/10.1016/j.palaeo.2025.113354.","productDescription":"113354, 29 p.","ipdsId":"IP-179136","costCenters":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"links":[{"id":499374,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"San Luis Obispo Bay area","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -121,\n 35.5\n ],\n [\n -121,\n 35\n ],\n [\n -120.5,\n 35\n ],\n [\n -120.5,\n 35.5\n ],\n [\n -121,\n 35.5\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"681","noUsgsAuthors":false,"publicationDate":"2025-11-04","publicationStatus":"PW","contributors":{"authors":[{"text":"Muhs, Daniel R. 0000-0001-7449-251X dmuhs@usgs.gov","orcid":"https://orcid.org/0000-0001-7449-251X","contributorId":168575,"corporation":false,"usgs":true,"family":"Muhs","given":"Daniel R.","email":"dmuhs@usgs.gov","affiliations":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"preferred":true,"id":954857,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Groves, Lindsey T. 0000-0002-2097-2689","orcid":"https://orcid.org/0000-0002-2097-2689","contributorId":365815,"corporation":false,"usgs":false,"family":"Groves","given":"Lindsey","middleInitial":"T.","affiliations":[{"id":12725,"text":"Natural History Museum of Los Angeles County","active":true,"usgs":false}],"preferred":false,"id":954858,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Schumann, R. Randall 0000-0001-8158-6960 rschumann@usgs.gov","orcid":"https://orcid.org/0000-0001-8158-6960","contributorId":1569,"corporation":false,"usgs":true,"family":"Schumann","given":"R.","email":"rschumann@usgs.gov","middleInitial":"Randall","affiliations":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"preferred":true,"id":954859,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bright, Jordon","contributorId":63981,"corporation":false,"usgs":false,"family":"Bright","given":"Jordon","affiliations":[{"id":7042,"text":"University of Arizona","active":true,"usgs":false}],"preferred":false,"id":954860,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70272071,"text":"70272071 - 2026 - Quantifying depuration of methylmercury from fish consumption by travelers","interactions":[],"lastModifiedDate":"2026-02-24T16:11:40.18436","indexId":"70272071","displayToPublicDate":"2025-11-04T09:37:01","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":22696,"text":"Environment and Health","active":true,"publicationSubtype":{"id":10}},"title":"Quantifying depuration of methylmercury from fish consumption by travelers","docAbstract":"

During a two-week field sampling expedition in Gabon, two American scientists consumed fish daily from the Ogooué River watershed. We sampled their scalp and facial hair periodically to evaluate hair as a biomarker to track shifts in methylmercury (MeHg) exposure from diet. Each individual differed in the onset and extent of MeHg accumulation but showed similar depuration rates. Pretrip baseline Hg isotope values between participants were distinct from Gabonese fishes allowing us to detect shifts in MeHg sources in the hair of both individuals. δ202Hg values tracked the mass-dependent fractionation of MeHg depuration stemming from in vivo metabolism, leading to δ202Hg increases of 0.014 ± 0.001 per mille and total Hg losses of 8.3 ± 1.1 ng g–1 daily. While limited in scope due to minimal participants, our findings reveal a complex interaction between prior MeHg burdens, contemporary MeHg intakes, and sources of consumed fishes (locally caught versus market-sourced) in determining the dynamics of MeHg concentrations and δ202Hg in human hair. We also suggest that the offset in δ202Hg values used in literature between fish and human hair (1.75 ± 0.25‰) may overlook a time domain that increases starting fish-hair δ202Hg offsets (0.94‰), through time.

","language":"English","publisher":"American Chemical Society","doi":"10.1021/envhealth.5c00389","usgsCitation":"Lepak, R., Mve Beh, J.H., Moukegni-Sika, C., Binguema, J.N., Janssen, S., Ogorek, J.M., Tate, M., and McIntyre, P.B., 2025, Quantifying depuration of methylmercury from fish consumption by travelers: Environment and Health, 7 p., https://doi.org/10.1021/envhealth.5c00389.","productDescription":"7 p.","startPage":"324","endPage":"330","ipdsId":"IP-163679","costCenters":[{"id":37947,"text":"Upper Midwest Water Science Center","active":true,"usgs":true}],"links":[{"id":496499,"rank":2,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":496715,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1021/envhealth.5c00389","text":"Publisher Index Page"}],"country":"Gabon","otherGeospatial":"Agence Nationale des Parcs Nationaux","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n 12.31971888066704,\n 1.2471426557898582\n ],\n [\n 11.241184225711166,\n 0.20331454901326396\n ],\n [\n 11.408429911320496,\n -0.813464061472672\n ],\n [\n 12.507623516894313,\n -0.39210909608205213\n ],\n [\n 12.617490822740251,\n 0.2763285108633049\n ],\n [\n 13.867587413489602,\n -0.09470181133973732\n ],\n [\n 14.50408519345936,\n 0.9172318857330097\n ],\n [\n 14.224953029643586,\n 1.411830394211961\n ],\n [\n 12.31971888066704,\n 1.2471426557898582\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"4","issue":"2","noUsgsAuthors":false,"publicationDate":"2025-11-04","publicationStatus":"PW","contributors":{"authors":[{"text":"Lepak, Ryan F. 0000-0003-2806-1895","orcid":"https://orcid.org/0000-0003-2806-1895","contributorId":210990,"corporation":false,"usgs":false,"family":"Lepak","given":"Ryan F.","affiliations":[{"id":16925,"text":"University of Wisconsin-Madison","active":true,"usgs":false}],"preferred":false,"id":949976,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mve Beh, Jean H.","contributorId":362132,"corporation":false,"usgs":false,"family":"Mve Beh","given":"Jean","middleInitial":"H.","affiliations":[],"preferred":false,"id":950080,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Moukegni-Sika, Clotaire","contributorId":362133,"corporation":false,"usgs":false,"family":"Moukegni-Sika","given":"Clotaire","affiliations":[],"preferred":false,"id":950081,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Binguema, Jean N.B.","contributorId":362134,"corporation":false,"usgs":false,"family":"Binguema","given":"Jean","middleInitial":"N.B.","affiliations":[],"preferred":false,"id":950082,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Janssen, Sarah E. 0000-0003-4432-3154","orcid":"https://orcid.org/0000-0003-4432-3154","contributorId":210991,"corporation":false,"usgs":true,"family":"Janssen","given":"Sarah E.","affiliations":[{"id":37947,"text":"Upper Midwest Water Science Center","active":true,"usgs":true},{"id":677,"text":"Wisconsin Water Science Center","active":true,"usgs":true}],"preferred":true,"id":950083,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Ogorek, Jacob M. 0000-0002-6327-0740 jmogorek@usgs.gov","orcid":"https://orcid.org/0000-0002-6327-0740","contributorId":4960,"corporation":false,"usgs":true,"family":"Ogorek","given":"Jacob","email":"jmogorek@usgs.gov","middleInitial":"M.","affiliations":[{"id":37947,"text":"Upper Midwest Water Science Center","active":true,"usgs":true},{"id":677,"text":"Wisconsin Water Science Center","active":true,"usgs":true},{"id":606,"text":"Upper Midwest Environmental Sciences Center","active":true,"usgs":true}],"preferred":true,"id":949978,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Tate, Michael 0000-0003-1525-1219 mttate@usgs.gov","orcid":"https://orcid.org/0000-0003-1525-1219","contributorId":216029,"corporation":false,"usgs":true,"family":"Tate","given":"Michael","email":"mttate@usgs.gov","affiliations":[{"id":37947,"text":"Upper Midwest Water Science Center","active":true,"usgs":true}],"preferred":true,"id":949979,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"McIntyre, Peter B.","contributorId":362093,"corporation":false,"usgs":false,"family":"McIntyre","given":"Peter","middleInitial":"B.","affiliations":[{"id":12722,"text":"Cornell University","active":true,"usgs":false}],"preferred":false,"id":949980,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ,{"id":70273811,"text":"70273811 - 2026 - High-precision earthquake catalog for Minto Flats fault zone, central Alaska, reveals complex and conjugate faulting","interactions":[],"lastModifiedDate":"2026-02-04T14:24:54.694859","indexId":"70273811","displayToPublicDate":"2025-11-04T08:30:37","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":7571,"text":"Bulletin of Seismological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"High-precision earthquake catalog for Minto Flats fault zone, central Alaska, reveals complex and conjugate faulting","docAbstract":"

The Minto Flats fault zone (MFFZ) in central Alaska is a left‐lateral strike‐slip fault system situated between the continental‐scale right‐lateral Denali and Kaltag‐Tintina faults. The MFFZ has the potential to generate magnitude 7 earthquakes, and it hosted a magnitude 6 earthquake in 1995. It has also produced exotic events, such as very‐low‐frequency earthquakes and nucleation signals. We use network‐matched filtering and relative earthquake relocation techniques to derive a detailed catalog of earthquake locations for the MFFZ. The catalog spans from August 2014 to December 2019, a time period including 13 temporary seismic stations in the region. Our results provide the most complete catalog for the MFFZ and include deeper events, clusters of shallow seismicity, and a complex and segmented fault structure not observed in the original regional catalog. We document right‐lateral strike‐slip faulting, conjugate to the main northeast‐striking left‐lateral faults of the MFFZ. Below Nenana basin, the relocated seismicity reveals northwest‐dipping left‐lateral faults, supporting the inference that deep crustal active faulting is associated with recent basin deformation.

","language":"English","publisher":"Seismological Society of America","doi":"10.1785/0120250177","usgsCitation":"Sims, N.E., Tape, C., Ruppert, N., and West, M.E., 2026, High-precision earthquake catalog for Minto Flats fault zone, central Alaska, reveals complex and conjugate faulting: Bulletin of Seismological Society of America, v. 116, no. 1, p. 375-396, https://doi.org/10.1785/0120250177.","productDescription":"22 p.","startPage":"375","endPage":"396","ipdsId":"IP-182902","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":499435,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Minto Flats fault zone","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -146.5,\n 65.2\n ],\n [\n -150,\n 65.2\n ],\n [\n -150,\n 64.2\n ],\n [\n -146.5,\n 64.2\n ],\n [\n -146.5,\n 65.2\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"116","issue":"1","noUsgsAuthors":false,"publicationDate":"2025-11-04","publicationStatus":"PW","contributors":{"authors":[{"text":"Sims, Nealey E.","contributorId":365831,"corporation":false,"usgs":false,"family":"Sims","given":"Nealey","middleInitial":"E.","affiliations":[{"id":6752,"text":"University of Alaska Fairbanks","active":true,"usgs":false}],"preferred":false,"id":954904,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Tape, Carl","contributorId":219960,"corporation":false,"usgs":false,"family":"Tape","given":"Carl","email":"","affiliations":[{"id":40098,"text":"Geophysical Institute, 2156 Koyukuk Drive, University of Alaska Fairbanks, Fairbanks, AK 99775","active":true,"usgs":false}],"preferred":false,"id":954905,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ruppert, Natalia A. 0000-0003-0589-1159","orcid":"https://orcid.org/0000-0003-0589-1159","contributorId":351514,"corporation":false,"usgs":true,"family":"Ruppert","given":"Natalia A.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":954906,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"West, Michael E.","contributorId":365832,"corporation":false,"usgs":false,"family":"West","given":"Michael","middleInitial":"E.","affiliations":[{"id":6752,"text":"University of Alaska Fairbanks","active":true,"usgs":false}],"preferred":false,"id":954907,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70272655,"text":"70272655 - 2026 - Apparent annual survival of adult Golden-winged Warblers (Vermivora chrysoptera) may not differ by sex or region","interactions":[],"lastModifiedDate":"2026-01-22T16:31:44.056289","indexId":"70272655","displayToPublicDate":"2025-10-28T10:26:18","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":10109,"text":"Ornithology","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Apparent annual survival of adult Golden-winged Warblers (Vermivora chrysoptera) may not differ by sex or region","title":"Apparent annual survival of adult Golden-winged Warblers (Vermivora chrysoptera) may not differ by sex or region","docAbstract":"

Understanding range-wide demographic, spatial, and temporal variation in annual survival is essential for managing species of conservation concern. Multi-population models are useful tools for integrating diverse datasets, reducing biases, and deriving survival estimates across differing spatial scales. We conducted a range-wide, multi-population apparent annual survival analysis for a declining songbird, Vermivora chrysoptera (Golden-winged Warbler), using data from 18 sites across its breeding and nonbreeding grounds. This Nearctic-Neotropical migrant breeds in 2 disjunct regional populations, the Great Lakes and Appalachian Mountains, which are experiencing different rates of decline. We aimed to quantify regional-, site-, and sex-specific apparent annual survival estimates to identify geographic patterns or demographic factors influencing population declines. We used simulations to assess the precision of our estimates. Our models did not reveal a substantial difference in apparent annual survival between the Great Lakes (0.41, 95% credible interval (CrI):0.31–0.50) and the Appalachian regions (0.49, 95% CrI: 0.36–0.60), as CrIs overlapped. Site-specific estimates also showed no clear differences in apparent annual survival among sites representing both regional populations. Male apparent annual survival tended to be greater than female apparent annual survival in both regions, though CrI’s overlapped. Our study suggests demographic factors other than adult annual survival likely play a larger role in recent regional and range-wide population declines, such as productivity, juvenile/immature survival, or recruitment. Simulations indicate that improving recapture probability and study duration of datasets could lead to more precise apparent annual survival estimates. However, our model produced CrI ranges comparable to the most ideal data collection scenario, suggesting the lack of trends we found was not due to variability in our estimates. We stress the importance of addressing inherent biases in survival datasets and the need for standardized collaborative efforts to inform species conservation on a range-wide scale.

","language":"English","publisher":"Oxford Academic","doi":"10.1093/ornithology/ukaf049","usgsCitation":"Filiberti, E.N., Roth, A.M., Thogmartin, W.E., Royal, E.J., Aldinger, K.R., Bennett, R.E., Buehler, D.A., Bulluck, L.P., Canterbury, R.A., Chandler, R., Clements, S.J., Fiss, C.J., Hobson, K.A., Jones, J.A., King, D., Kramer, G.R., Larkin, J.L., McNeil, D.J., Ritterson, J.D., Buckardt Thomas, A., Vallender, R., Van Wilgenburg, S.L., and Wood, P.B., 2026, Apparent annual survival of adult Golden-winged Warblers (Vermivora chrysoptera) may not differ by sex or region: Ornithology, v. 143, no. 1, p. 1-13, https://doi.org/10.1093/ornithology/ukaf049.","productDescription":"13 p.","startPage":"1","endPage":"13","ipdsId":"IP-177249","costCenters":[{"id":606,"text":"Upper Midwest Environmental Sciences Center","active":true,"usgs":true}],"links":[{"id":496993,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"143","issue":"1","noUsgsAuthors":false,"publicationDate":"2025-10-28","publicationStatus":"PW","contributors":{"authors":[{"text":"Filiberti, Emily N.","contributorId":363159,"corporation":false,"usgs":false,"family":"Filiberti","given":"Emily","middleInitial":"N.","affiliations":[{"id":7063,"text":"University of Maine","active":true,"usgs":false}],"preferred":false,"id":951198,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Roth, Amber M.","contributorId":363161,"corporation":false,"usgs":false,"family":"Roth","given":"Amber","middleInitial":"M.","affiliations":[{"id":7063,"text":"University of Maine","active":true,"usgs":false}],"preferred":false,"id":951199,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Thogmartin, Wayne E. 0000-0002-2384-4279 wthogmartin@usgs.gov","orcid":"https://orcid.org/0000-0002-2384-4279","contributorId":2545,"corporation":false,"usgs":true,"family":"Thogmartin","given":"Wayne","email":"wthogmartin@usgs.gov","middleInitial":"E.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":606,"text":"Upper Midwest Environmental Sciences Center","active":true,"usgs":true}],"preferred":true,"id":951200,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Royal, Ethan J.","contributorId":363163,"corporation":false,"usgs":false,"family":"Royal","given":"Ethan","middleInitial":"J.","affiliations":[{"id":7063,"text":"University of Maine","active":true,"usgs":false}],"preferred":false,"id":951201,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Aldinger, Kyle R.","contributorId":363165,"corporation":false,"usgs":false,"family":"Aldinger","given":"Kyle","middleInitial":"R.","affiliations":[{"id":86634,"text":"West Virginia Cooperative Fish and Wildlife Research Unit, West Virginia University","active":true,"usgs":false}],"preferred":false,"id":951202,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Bennett, Ruth E.","contributorId":363166,"corporation":false,"usgs":false,"family":"Bennett","given":"Ruth","middleInitial":"E.","affiliations":[{"id":49100,"text":"Smithsonian National Zoo","active":true,"usgs":false}],"preferred":false,"id":951203,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Buehler, David A.","contributorId":363167,"corporation":false,"usgs":false,"family":"Buehler","given":"David","middleInitial":"A.","affiliations":[{"id":12716,"text":"University of Tennessee","active":true,"usgs":false}],"preferred":false,"id":951204,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Bulluck, Lesley P.","contributorId":204987,"corporation":false,"usgs":false,"family":"Bulluck","given":"Lesley","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":951205,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Canterbury, Ronald A.","contributorId":363168,"corporation":false,"usgs":false,"family":"Canterbury","given":"Ronald","middleInitial":"A.","affiliations":[{"id":7159,"text":"University of Cincinnati","active":true,"usgs":false}],"preferred":false,"id":951206,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Chandler, Richard","contributorId":337621,"corporation":false,"usgs":false,"family":"Chandler","given":"Richard","affiliations":[{"id":24699,"text":"UGA","active":true,"usgs":false}],"preferred":false,"id":951207,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Clements, Sarah J.","contributorId":363169,"corporation":false,"usgs":false,"family":"Clements","given":"Sarah","middleInitial":"J.","affiliations":[{"id":7063,"text":"University of Maine","active":true,"usgs":false}],"preferred":false,"id":951208,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Fiss, Cameron J.","contributorId":363170,"corporation":false,"usgs":false,"family":"Fiss","given":"Cameron","middleInitial":"J.","affiliations":[{"id":12465,"text":"University of Pittsburgh","active":true,"usgs":false}],"preferred":false,"id":951209,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Hobson, Keith A.","contributorId":363171,"corporation":false,"usgs":false,"family":"Hobson","given":"Keith","middleInitial":"A.","affiliations":[{"id":36681,"text":"Environment and Climate Change Canada","active":true,"usgs":false}],"preferred":false,"id":951210,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Jones, John Anthony","contributorId":363172,"corporation":false,"usgs":false,"family":"Jones","given":"John","middleInitial":"Anthony","affiliations":[{"id":36626,"text":"Appalachian State University","active":true,"usgs":false}],"preferred":false,"id":951211,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"King, David A.","contributorId":201282,"corporation":false,"usgs":false,"family":"King","given":"David A.","affiliations":[],"preferred":false,"id":951212,"contributorType":{"id":1,"text":"Authors"},"rank":15},{"text":"Kramer, Gunnar R.","contributorId":363173,"corporation":false,"usgs":false,"family":"Kramer","given":"Gunnar","middleInitial":"R.","affiliations":[{"id":6911,"text":"Iowa State University","active":true,"usgs":false}],"preferred":false,"id":951213,"contributorType":{"id":1,"text":"Authors"},"rank":16},{"text":"Larkin, Jeffery L.","contributorId":363174,"corporation":false,"usgs":false,"family":"Larkin","given":"Jeffery","middleInitial":"L.","affiliations":[{"id":38138,"text":"Indiana University of Pennsylvania","active":true,"usgs":false}],"preferred":false,"id":951214,"contributorType":{"id":1,"text":"Authors"},"rank":17},{"text":"McNeil, Darin J.","contributorId":363176,"corporation":false,"usgs":false,"family":"McNeil","given":"Darin","middleInitial":"J.","affiliations":[{"id":86636,"text":"Massachusetts Audubon Society","active":true,"usgs":false}],"preferred":false,"id":951215,"contributorType":{"id":1,"text":"Authors"},"rank":18},{"text":"Ritterson, Jeffrey D.","contributorId":363178,"corporation":false,"usgs":false,"family":"Ritterson","given":"Jeffrey","middleInitial":"D.","affiliations":[{"id":7063,"text":"University of Maine","active":true,"usgs":false}],"preferred":false,"id":951216,"contributorType":{"id":1,"text":"Authors"},"rank":19},{"text":"Buckardt Thomas, Anna","contributorId":343310,"corporation":false,"usgs":false,"family":"Buckardt Thomas","given":"Anna","affiliations":[{"id":24495,"text":"Iowa Department of Natural Resources","active":true,"usgs":false}],"preferred":false,"id":951217,"contributorType":{"id":1,"text":"Authors"},"rank":20},{"text":"Vallender, Rachel","contributorId":194966,"corporation":false,"usgs":false,"family":"Vallender","given":"Rachel","email":"","affiliations":[{"id":34540,"text":"Canadian Museum of Nature","active":true,"usgs":false},{"id":27312,"text":"Canadian Wildlife Service, Environment and Climate Change Canada, 6 Bruce Street, Mount","active":true,"usgs":false}],"preferred":false,"id":951218,"contributorType":{"id":1,"text":"Authors"},"rank":21},{"text":"Van Wilgenburg, Steven L.","contributorId":363180,"corporation":false,"usgs":false,"family":"Van Wilgenburg","given":"Steven","middleInitial":"L.","affiliations":[{"id":36681,"text":"Environment and Climate Change Canada","active":true,"usgs":false}],"preferred":false,"id":951219,"contributorType":{"id":1,"text":"Authors"},"rank":22},{"text":"Wood, Petra B.","contributorId":305342,"corporation":false,"usgs":false,"family":"Wood","given":"Petra","email":"","middleInitial":"B.","affiliations":[{"id":66214,"text":"West Virginia Cooperative Fish and Wildlife Research Unit,","active":true,"usgs":false}],"preferred":false,"id":951220,"contributorType":{"id":1,"text":"Authors"},"rank":23}]}} ,{"id":70274692,"text":"70274692 - 2026 - Riverscape genetics of nonnative Brook Trout to inform native cutthroat trout conservation","interactions":[],"lastModifiedDate":"2026-04-06T14:07:36.785359","indexId":"70274692","displayToPublicDate":"2025-10-25T09:04:03","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3624,"text":"Transactions of the American Fisheries Society","active":true,"publicationSubtype":{"id":10}},"title":"Riverscape genetics of nonnative Brook Trout to inform native cutthroat trout conservation","docAbstract":"
Objective

Understanding how riverscape features influence gene flow is critical for managing population connectivity in freshwater species. We examined how landscape and stream characteristics shape the spatial genetic structure of nonnative Brook Trout Salvelinus fontinalis in a headwater stream network proposed for reintroduction of federally threatened Greenback Cutthroat Trout Oncorhynchus virginalis stomias. Brook Trout were studied to evaluate the suitability of this habitat for supporting a native trout metapopulation.

Methods

We genotyped 757 Brook Trout from 22 sites across a 60-km stream network using 12 microsatellite loci. Spatial genetic structure was assessed using clustering analysis (program STRUCTURE) and pairwise differentiation metrics (FST and Jost’s D). A spatial network modeling approach was used to quantify the effects of riverscape features (e.g., stream gradient, stream order, waterfalls, and flow direction) on trout gene flow.

Results

Genetic clustering identified four distinct tributary groups, while estimates of pairwise genetic differentiation indicated some genetic connectivity across the network (mean FST = 0.04; mean Jost’s D = 0.06). Trout gene flow was impeded by waterfalls, steep stream gradients, and increased hydrologic distance. Higher stream order and downstream flow direction were associated with stronger gene flow, and stream segments containing waterfalls and steeper gradients showed greater asymmetries between upstream and downstream gene flow.

Conclusions

Brook Trout populations in this stream network are spatially structured, but gene flow persists and is mediated by physical riverscape features and hydrologic distance. The observed patterns of genetic connectivity suggest that this habitat can support connectivity among populations of reintroduced Greenback Cutthroat Trout. In future native trout reintroduction efforts, prioritizing habitats with gradual stream gradients and fewer waterfalls would promote population connectivity.

","language":"English","publisher":"Oxford Academic","doi":"10.1093/tafafs/vnaf045","usgsCitation":"Stack, T., Harris, A.C., Fairchild, M.P., Oyler-McCance, S.J., Fike, J., Winkelman, D.L., and Kanno, Y., 2026, Riverscape genetics of nonnative Brook Trout to inform native cutthroat trout conservation: Transactions of the American Fisheries Society, v. 155, no. 1, p. 26-40, https://doi.org/10.1093/tafafs/vnaf045.","productDescription":"15 p.","startPage":"26","endPage":"40","ipdsId":"IP-176667","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":502199,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"155","issue":"1","noUsgsAuthors":false,"publicationDate":"2025-10-22","publicationStatus":"PW","contributors":{"authors":[{"text":"Stack, Taylor","contributorId":340291,"corporation":false,"usgs":false,"family":"Stack","given":"Taylor","email":"","affiliations":[{"id":81548,"text":"Department of Fish, Wildlife, and Conservation Biology, Colorado State University","active":true,"usgs":false}],"preferred":false,"id":958707,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Harris, Audrey C.","contributorId":369264,"corporation":false,"usgs":false,"family":"Harris","given":"Audrey","middleInitial":"C.","affiliations":[{"id":20304,"text":"Pacific States Marine Fisheries Commission","active":true,"usgs":false}],"preferred":false,"id":958708,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Fairchild, Matthew P.","contributorId":369265,"corporation":false,"usgs":false,"family":"Fairchild","given":"Matthew","middleInitial":"P.","affiliations":[{"id":36400,"text":"US Forest Service","active":true,"usgs":false}],"preferred":false,"id":958709,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Oyler-McCance, Sara J. 0000-0003-1599-8769 sara_oyler-mccance@usgs.gov","orcid":"https://orcid.org/0000-0003-1599-8769","contributorId":1973,"corporation":false,"usgs":true,"family":"Oyler-McCance","given":"Sara","email":"sara_oyler-mccance@usgs.gov","middleInitial":"J.","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":958710,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Fike, Jennifer A. 0000-0001-8797-7823","orcid":"https://orcid.org/0000-0001-8797-7823","contributorId":207268,"corporation":false,"usgs":true,"family":"Fike","given":"Jennifer A.","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":958711,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Winkelman, Dana L. 0000-0002-5247-0114 danaw@usgs.gov","orcid":"https://orcid.org/0000-0002-5247-0114","contributorId":4141,"corporation":false,"usgs":true,"family":"Winkelman","given":"Dana","email":"danaw@usgs.gov","middleInitial":"L.","affiliations":[{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true}],"preferred":true,"id":958712,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Kanno, Yoichiro","contributorId":210653,"corporation":false,"usgs":false,"family":"Kanno","given":"Yoichiro","affiliations":[{"id":6621,"text":"Colorado State University","active":true,"usgs":false}],"preferred":false,"id":958713,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70272591,"text":"70272591 - 2026 - Year-round daytime pCO2 undersaturation in an instream series of urban reservoirs with a history of harmful algal blooms","interactions":[],"lastModifiedDate":"2026-02-09T16:08:11.743228","indexId":"70272591","displayToPublicDate":"2025-10-23T08:11:09","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1999,"text":"Inland Waters","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Year-round daytime pCO2 undersaturation in an instream series of urban reservoirs with a history of harmful algal blooms","title":"Year-round daytime pCO2 undersaturation in an instream series of urban reservoirs with a history of harmful algal blooms","docAbstract":"

Daytime water quality was determined monthly over two years in an instream series of four urban reservoirs with recurring blooms of Prymnesium parvum—a cool-season toxigenic species. Temperature, pH, and laboratory-measured total alkalinity were used to estimate pCO2. System-wide, pCO2 was negatively associated with dissolved oxygen. Chlorophyll-a, phycocyanin (cyanobacterial pigment), and P. parvum were negatively associated with pCO2 and positively with dissolved oxygen. Three reservoirs were productive and, during daytime, pCO2-undersaturated year-round or near-year-round, while a fourth (third in the series) was unproductive and mostly pCO2-oversaturated. Seasonal phycocyanin and chlorophyll-a patterns indicated that cyanobacterial and eukaryotic (P. parvum included) phytoplankton growth drives daytime CO2 depletion in the productive reservoirs during the warm and cool seasons, respectively. The system’s moderate alkalinity (HCO3−) may serve as an alternative carbon source for photosynthesis; however, the persistent depletion of CO2 and the energetic cost of using HCO3− are consistent with a scenario where phytoplankton growth is CO2-limited. Daytime pCO2 undersaturation across seasons has been rarely reported, but this study indicated it occurs more often than recognized. The non-monotonic spatial patterns in productivity and carbonate system conditions across the study reservoirs indicate that localized influences from a heterogeneous urban landscape may help shape individual lake metabolism.

","language":"English","publisher":"Taylor & Francis","doi":"10.1080/20442041.2025.2544581","usgsCitation":"Patino, R., and Lehker, S., 2026, Year-round daytime pCO2 undersaturation in an instream series of urban reservoirs with a history of harmful algal blooms: Inland Waters, v. 16, no. 1, 2544581, 15 p., https://doi.org/10.1080/20442041.2025.2544581.","productDescription":"2544581, 15 p.","ipdsId":"IP-171218","costCenters":[{"id":198,"text":"Coop Res Unit Atlanta","active":true,"usgs":true}],"links":[{"id":496823,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Texas","county":"Lubbock","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -101.93988097783505,\n 33.64162038185367\n ],\n [\n -101.93988097783505,\n 33.52159454590185\n ],\n [\n -101.77150820869511,\n 33.52159454590185\n ],\n [\n -101.77150820869511,\n 33.64162038185367\n ],\n [\n -101.93988097783505,\n 33.64162038185367\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"16","issue":"1","noUsgsAuthors":false,"publicationDate":"2026-01-23","publicationStatus":"PW","contributors":{"authors":[{"text":"Patino, Reynaldo 0000-0002-4831-8400 r.patino@usgs.gov","orcid":"https://orcid.org/0000-0002-4831-8400","contributorId":2311,"corporation":false,"usgs":true,"family":"Patino","given":"Reynaldo","email":"r.patino@usgs.gov","affiliations":[{"id":198,"text":"Coop Res Unit Atlanta","active":true,"usgs":true}],"preferred":true,"id":950878,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lehker, Samantha","contributorId":362957,"corporation":false,"usgs":false,"family":"Lehker","given":"Samantha","affiliations":[{"id":36331,"text":"Texas Tech University","active":true,"usgs":false}],"preferred":false,"id":950879,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70272053,"text":"70272053 - 2026 - Sedimentological and geochemical characterization of lacustrine deposits of the Babouri-Figuil basin, northern Cameroon: Implications for source rocks distribution and petroleum exploration","interactions":[],"lastModifiedDate":"2025-11-14T16:30:36.885339","indexId":"70272053","displayToPublicDate":"2025-10-21T08:35:22","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2147,"text":"Journal of African Earth Sciences","active":true,"publicationSubtype":{"id":10}},"title":"Sedimentological and geochemical characterization of lacustrine deposits of the Babouri-Figuil basin, northern Cameroon: Implications for source rocks distribution and petroleum exploration","docAbstract":"

The West and Central African Rift System (WCARS) refers to the series of Cretaceous rift basins where commercial hydrocarbon accumulations have been discovered. Some of the WCARS frontier basins are currently being investigated to increase our understanding of these basins in light of new commercial discoveries. The present study was performed in the Babouri-Figuil Basin (BFB), which is genetically related to the WCARS and constitutes an area of interest in terms of petroleum prospecting, where the distribution of petroleum source rocks and potential targets for petroleum exploration across the entire basin is poorly understood. For the current study, an integrated facies analysis along with organic and inorganic geochemical techniques were applied to the basin's Cretaceous deposits with the aim of reconstructing the paleodepositional environment, assessing factors that triggered the input of organic matter, and providing a spatial overview of the organic matter accumulation in the basin based on outcrop samples. An alluvial fan-lacustrine-braided river system is inferred from the facies analysis of the stratigraphic sequence consisting of conglomerate, sandstone, siltstone, limestone, marlstone, and claystone. Bulk analysis of organic matter reveals that black shale and massive claystone are the main prospective petroleum source rocks in the basin. Inorganic geochemical analyses reveal the influence of anoxic conditions, moderate to high primary productivity, and low terrigenous inputs in organic matter enrichment. The formations rich in organic matter are predominantly concentrated in the western and eastern parts of the basin which may represent areas with depressions, characterized by high accommodation space. In terms of the regional context of the WCARS rift basins, typical hydrocarbon exploration in the BFB may target basal-conglomerate, sandstone beds situated directly above or/and interbedded with the Lower Cretaceous source rocks, and the Upper Cretaceous sandstone beds. Basement rocks (granite, granodiorite, and gneisses) and oil shale deposits may represent potential unconventional hydrocarbon exploration. The current integrated study provides an insight that should guide future hydrocarbon exploration campaigns in the basin.

","language":"English","publisher":"Elsevier","doi":"10.1016/j.jafrearsci.2025.105894","usgsCitation":"Manga, W.G., Hackley, P.C., Bessong, M., Hatcherian, J.J., Ashukem, E.K., Guedala, A., Meying, A., and Samankassou, E., 2026, Sedimentological and geochemical characterization of lacustrine deposits of the Babouri-Figuil basin, northern Cameroon: Implications for source rocks distribution and petroleum exploration: Journal of African Earth Sciences, v. 233, 105894, 16 p., https://doi.org/10.1016/j.jafrearsci.2025.105894.","productDescription":"105894, 16 p.","ipdsId":"IP-171940","costCenters":[{"id":49175,"text":"Geology, Energy & Minerals Science Center","active":true,"usgs":true}],"links":[{"id":496494,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Cameroon","otherGeospatial":"Babouri-Figuil basin","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n 13.667,\n 9.85\n ],\n [\n 13.667,\n 9.6333\n ],\n [\n 14.0333,\n 9.6333\n ],\n [\n 14.0333,\n 9.85\n ],\n [\n 13.667,\n 9.85\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"233","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Manga, William Gaspard O.","contributorId":352997,"corporation":false,"usgs":false,"family":"Manga","given":"William","middleInitial":"Gaspard O.","affiliations":[{"id":84323,"text":"Institute of Geological and Mining Research, P.O. 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Box. 4110 Yaoundé, Cameroon; Department of Earth Sciences, University of Geneva, 13, Rue des Maraîchers, 1205 Geneva, Switzerland","active":true,"usgs":false}],"preferred":false,"id":949925,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hatcherian, Javin J. 0000-0001-9151-6798 jhatcherian@usgs.gov","orcid":"https://orcid.org/0000-0001-9151-6798","contributorId":195770,"corporation":false,"usgs":true,"family":"Hatcherian","given":"Javin","email":"jhatcherian@usgs.gov","middleInitial":"J.","affiliations":[{"id":241,"text":"Eastern Energy Resources Science Center","active":true,"usgs":true},{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"preferred":true,"id":949926,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ashukem, Ethel K.","contributorId":362067,"corporation":false,"usgs":false,"family":"Ashukem","given":"Ethel","middleInitial":"K.","affiliations":[{"id":84325,"text":"Institute of Geological and Mining Research, P.O. Box. 4110 Yaoundé, Cameroon","active":true,"usgs":false}],"preferred":false,"id":949927,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Guedala, Alifa","contributorId":353000,"corporation":false,"usgs":false,"family":"Guedala","given":"Alifa","affiliations":[{"id":84325,"text":"Institute of Geological and Mining Research, P.O. Box. 4110 Yaoundé, Cameroon","active":true,"usgs":false}],"preferred":false,"id":949928,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Meying, Arsène","contributorId":353001,"corporation":false,"usgs":false,"family":"Meying","given":"Arsène","affiliations":[{"id":84328,"text":"School of Geology and Mining Engineering, Ngaoundere University P.O. Box 115 Meiganga, Cameroon","active":true,"usgs":false}],"preferred":false,"id":949929,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Samankassou, Elias","contributorId":353002,"corporation":false,"usgs":false,"family":"Samankassou","given":"Elias","affiliations":[{"id":84329,"text":"Department of Earth Sciences, University of Geneva, 13, Rue des Maraîchers, 1205 Geneva, Switzerland","active":true,"usgs":false}],"preferred":false,"id":949930,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ,{"id":70274003,"text":"70274003 - 2026 - Seasonal body mass dynamics mediate life-history trade-offs in a hibernating mammal","interactions":[],"lastModifiedDate":"2026-03-09T14:52:02.089844","indexId":"70274003","displayToPublicDate":"2025-10-18T08:46:43","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2158,"text":"Journal of Animal Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Seasonal body mass dynamics mediate life-history trade-offs in a hibernating mammal","docAbstract":"

1. Energetic acquisition and growth are key traits that affect demography and life-history strategies. Many animals that live in seasonal environments in which food availability fluctuates store energy endogenously as fat in anticipation of food shortage. Fat-storing mammalian hibernators are an extreme example of this strategy where the optimal resolution of resource allocation trade-offs is essential to survival. Hence, these species provide an opportunity to test potential causes and consequences of seasonal body mass dynamics.

2. We used a 12-year dataset with 8753 body mass records from 3351 individually marked northern Idaho ground squirrels (Urocitellus brunneus) – a federally threatened hibernator – to meet three objectives: (1) document seasonal body mass changes by sex, age, and reproductive status, (2) test ecological hypotheses to explain spatiotemporal variation in body mass, and (3) document fitness consequences of pre-hibernation body condition via condition-dependent overwinter survival.

3. Squirrels varied substantially in seasonal body mass dynamics. The magnitude (36-155%) and onset (late May to early July) of rapid active-season mass gain varied among demographic groups. Reproductive females acquired the necessary fat stores to survive hibernation later in the active season than did males and non-reproductive females. Moreover, squirrels with better pre-hibernation body condition were more likely to survive to the subsequent year, potentially because they allocated excess energetic reserves to prolonging hibernation via early immergence and thereby reduced predation risk. These results suggest a direct trade-off between current and future reproduction mediated by resource acquisition and allocation, as predicted by life-history theory.

4. Colder active-season temperatures and lower conspecific densities negatively influenced squirrel body condition, possibly via reductions in foraging activity associated with those conditions. These ecological effects on body condition constrain resource allocation and demographic outcomes. As such, our results can help guide research and conservation strategies to benefit hibernating animals.

","language":"English","publisher":"British Ecological Society","doi":"10.1111/1365-2656.70160","usgsCitation":"Allison, A.Z., Conway, C.J., Goldberg, A.R., Morris, A.E., and Hakanson, E.C., 2026, Seasonal body mass dynamics mediate life-history trade-offs in a hibernating mammal: Journal of Animal Ecology, v. 95, no. 3, p. 383-396, https://doi.org/10.1111/1365-2656.70160.","productDescription":"14 p.","startPage":"383","endPage":"396","ipdsId":"IP-178391","costCenters":[{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true}],"links":[{"id":500344,"rank":2,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":500576,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/1365-2656.70160","text":"Publisher Index Page"}],"country":"United States","state":"Idaho","otherGeospatial":"northern Idaho","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -117.01727912063691,\n 48.949849031406984\n ],\n [\n -117.06550577544263,\n 45.77432685387063\n ],\n [\n -115.45669769129175,\n 45.603498147742044\n ],\n [\n -114.14771203572005,\n 46.038667434519695\n ],\n [\n -114.10553430532104,\n 46.61453544078449\n ],\n [\n -115.60028001696853,\n 47.5696411418145\n ],\n [\n -115.99924647829263,\n 47.875315792205775\n ],\n [\n -116.04207182244672,\n 49.00063541966966\n ],\n [\n -117.01727912063691,\n 48.949849031406984\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"95","issue":"3","noUsgsAuthors":false,"publicationDate":"2025-10-18","publicationStatus":"PW","contributors":{"authors":[{"text":"Allison, Austin Z.T.","contributorId":366617,"corporation":false,"usgs":false,"family":"Allison","given":"Austin","middleInitial":"Z.T.","affiliations":[{"id":36394,"text":"University of Idaho","active":true,"usgs":false}],"preferred":false,"id":956098,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Conway, Courtney J. 0000-0003-0492-2953 cconway@usgs.gov","orcid":"https://orcid.org/0000-0003-0492-2953","contributorId":2951,"corporation":false,"usgs":true,"family":"Conway","given":"Courtney","email":"cconway@usgs.gov","middleInitial":"J.","affiliations":[{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true}],"preferred":true,"id":956099,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Goldberg, Amanda R.","contributorId":366618,"corporation":false,"usgs":false,"family":"Goldberg","given":"Amanda","middleInitial":"R.","affiliations":[{"id":36394,"text":"University of Idaho","active":true,"usgs":false}],"preferred":false,"id":956100,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Morris, Alice E.","contributorId":366619,"corporation":false,"usgs":false,"family":"Morris","given":"Alice","middleInitial":"E.","affiliations":[{"id":36394,"text":"University of Idaho","active":true,"usgs":false}],"preferred":false,"id":956101,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hakanson, Emma C.","contributorId":366620,"corporation":false,"usgs":false,"family":"Hakanson","given":"Emma","middleInitial":"C.","affiliations":[{"id":36394,"text":"University of Idaho","active":true,"usgs":false}],"preferred":false,"id":956102,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70272452,"text":"70272452 - 2026 - Challenges and opportunities in mitigating sarcoptic mange in wild South American camelids","interactions":[],"lastModifiedDate":"2026-01-06T14:13:50.401745","indexId":"70272452","displayToPublicDate":"2025-10-17T08:44:25","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Challenges and opportunities in mitigating sarcoptic mange in wild South American camelids","docAbstract":"

Vicuñas (Vicugna vicugna) and guanacos (Lama guanicoe) are the two species of wild South American camelids whose distributions range from Peru to northern Argentina and southern Peru to southern Argentina, respectively. Listed as critically endangered in the 1960s due to poaching, vicuña numbers had been gradually recovering; however, new concerns about population stability have arisen with recent observations of sarcoptic mange outbreaks in this species. Sarcoptic mange is an infectious skin disease caused by the microscopic burrowing mite, Sarcoptes scabiei, which infects nearly 150 mammalian species globally, including guanaco and vicuña. Wild camelid populations across Argentina, Bolivia, Chile, and Peru have been affected by sarcoptic mange, with the most severe outbreaks resulting in localized extirpation. Population declines have conservation and economic implications, as many local communities harvest vicuña and guanaco fiber for profit. We review the current literature on sarcoptic mange in wild camelids from Argentina, Bolivia, Chile, and Peru to establish a current state of knowledge on spatial prevalence, management, and therapeutics, and identify existing knowledge gaps. Critical next steps include 1) implementation of effective management strategies that limit the transmission of sarcoptic mange, 2) standardization of data collected during community capture (i.e., chaccu) events, 3) assessing the potential role of community captures in mite transmission, and 4) evaluation of treatment options and best practices for implementation. Further, there is a need for capacity building to improve disease diagnostics and surveillance in wild camelids. A multisectoral collaboration between governmental authorities, communities, academic institutions, and national and international organizations focusing on wild South American camelid conservation could contribute to building actions aimed at preventing future outbreaks and mitigating the current burden of sarcoptic mange disease.

","language":"English","publisher":"The Wildlife Society","doi":"10.1002/jwmg.70125","usgsCitation":"Martin, A., Isasi-Catalá, E., Salgado-Caxito, M., Gallegos, A., Hostos-Olivera, L., Colchao-Claux, P., Smith, S.J., Beltran-Saavedra, F., Dougnac, C., Germana, C., Montoya, M., Carver, S., Cross, P., and Walzer, C., 2026, Challenges and opportunities in mitigating sarcoptic mange in wild South American camelids: Journal of Wildlife Management, v. 90, no. 1, e70125, 28 p., https://doi.org/10.1002/jwmg.70125.","productDescription":"e70125, 28 p.","ipdsId":"IP-148575","costCenters":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"links":[{"id":496919,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1002/jwmg.70125","text":"Publisher Index Page"},{"id":496777,"rank":2,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"South America","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -79.89276068519384,\n 12.078777453989517\n ],\n [\n -84.05130991626078,\n -4.35532823276467\n ],\n [\n -71.8782875515644,\n -22.597367895324183\n ],\n [\n -79.89276068519384,\n -59.227926354657086\n ],\n [\n -62.27262009516423,\n -57.69795166992744\n ],\n [\n -51.715750788124296,\n -41.004192610953936\n ],\n [\n -43.76235407564337,\n -30.052154681431\n ],\n [\n -32.550914183343686,\n -4.694942975251131\n ],\n [\n -59.46447023130274,\n 13.442139926888743\n ],\n [\n -79.89276068519384,\n 12.078777453989517\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"90","issue":"1","noUsgsAuthors":false,"publicationDate":"2025-10-17","publicationStatus":"PW","contributors":{"authors":[{"text":"Martin, Alynn","contributorId":267906,"corporation":false,"usgs":false,"family":"Martin","given":"Alynn","affiliations":[{"id":12716,"text":"University of Tennessee","active":true,"usgs":false}],"preferred":false,"id":950772,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Isasi-Catalá, Emiliana","contributorId":362887,"corporation":false,"usgs":false,"family":"Isasi-Catalá","given":"Emiliana","affiliations":[{"id":13272,"text":"Wildlife Conservation Society","active":true,"usgs":false}],"preferred":false,"id":950773,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Salgado-Caxito, Marilia","contributorId":362888,"corporation":false,"usgs":false,"family":"Salgado-Caxito","given":"Marilia","affiliations":[{"id":37959,"text":"Pontificia Universidad Católica de Chile","active":true,"usgs":false}],"preferred":false,"id":950774,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Gallegos, Ana","contributorId":362889,"corporation":false,"usgs":false,"family":"Gallegos","given":"Ana","affiliations":[{"id":13272,"text":"Wildlife Conservation Society","active":true,"usgs":false}],"preferred":false,"id":950775,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hostos-Olivera, Leonardo","contributorId":362891,"corporation":false,"usgs":false,"family":"Hostos-Olivera","given":"Leonardo","affiliations":[{"id":86553,"text":"University of Veterinary Medicine Vienna","active":true,"usgs":false}],"preferred":false,"id":950776,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Colchao-Claux, Paulo","contributorId":362894,"corporation":false,"usgs":false,"family":"Colchao-Claux","given":"Paulo","affiliations":[{"id":13272,"text":"Wildlife Conservation Society","active":true,"usgs":false}],"preferred":false,"id":950777,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Smith, Steven J.","contributorId":361158,"corporation":false,"usgs":false,"family":"Smith","given":"Steven","middleInitial":"J.","affiliations":[{"id":86223,"text":"Joint Global Change Research Institute, Pacific Northwest National Lab, College Park, MD, USA; Department of Atmospheric and Oceanic Science, University of Maryland, College Park, MD, USA","active":true,"usgs":false}],"preferred":false,"id":950778,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Beltran-Saavedra, Fabian","contributorId":362898,"corporation":false,"usgs":false,"family":"Beltran-Saavedra","given":"Fabian","affiliations":[{"id":13272,"text":"Wildlife Conservation Society","active":true,"usgs":false}],"preferred":false,"id":950779,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Dougnac, Catherine","contributorId":362899,"corporation":false,"usgs":false,"family":"Dougnac","given":"Catherine","affiliations":[{"id":13272,"text":"Wildlife Conservation Society","active":true,"usgs":false}],"preferred":false,"id":950780,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Germana, Camila","contributorId":362900,"corporation":false,"usgs":false,"family":"Germana","given":"Camila","affiliations":[{"id":13272,"text":"Wildlife Conservation Society","active":true,"usgs":false}],"preferred":false,"id":950781,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Montoya, Mariana","contributorId":269699,"corporation":false,"usgs":false,"family":"Montoya","given":"Mariana","email":"","affiliations":[],"preferred":false,"id":950782,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Carver, Scott 0000-0002-3579-7588","orcid":"https://orcid.org/0000-0002-3579-7588","contributorId":197456,"corporation":false,"usgs":false,"family":"Carver","given":"Scott","email":"","affiliations":[],"preferred":false,"id":950783,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Cross, Paul C. 0000-0001-8045-5213","orcid":"https://orcid.org/0000-0001-8045-5213","contributorId":204814,"corporation":false,"usgs":true,"family":"Cross","given":"Paul C.","affiliations":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"preferred":true,"id":950784,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Walzer, Chris","contributorId":335455,"corporation":false,"usgs":false,"family":"Walzer","given":"Chris","email":"","affiliations":[{"id":80411,"text":"Wildlife Conservation Society, Bronx, New York","active":true,"usgs":false}],"preferred":false,"id":950785,"contributorType":{"id":1,"text":"Authors"},"rank":14}]}} ,{"id":70272128,"text":"70272128 - 2026 - Advancing climate adaptation for inland fish and fisheries","interactions":[],"lastModifiedDate":"2026-02-09T16:04:00.75693","indexId":"70272128","displayToPublicDate":"2025-10-17T08:26:26","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1657,"text":"Fisheries","onlineIssn":"1548-8446","printIssn":"0363-2415","active":true,"publicationSubtype":{"id":10}},"title":"Advancing climate adaptation for inland fish and fisheries","docAbstract":"Climate change was barely a blip on the radar for inland fisheries management 20 years ago. Today, it's a central focus. A 2016 paper helped shift conversations, sparked adaptation efforts across fisheries management. The future is still uncertain, but adaptation is key to sustaining these important resources.","language":"English","publisher":"Oxford Academic","doi":"10.1093/fshmag/vuaf095","usgsCitation":"Lynch, A.J., Beard, T., and Paukert, C.P., 2026, Advancing climate adaptation for inland fish and fisheries: Fisheries, v. 51, no. 1, p. 14-17, https://doi.org/10.1093/fshmag/vuaf095.","productDescription":"4 p.","startPage":"14","endPage":"17","ipdsId":"IP-181431","costCenters":[{"id":36940,"text":"National Climate Adaptation Science Center","active":true,"usgs":true}],"links":[{"id":496722,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1093/fshmag/vuaf095","text":"Publisher Index Page"},{"id":496545,"rank":2,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United 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\"}}]}","volume":"51","issue":"1","noUsgsAuthors":false,"publicationDate":"2025-10-17","publicationStatus":"PW","contributors":{"authors":[{"text":"Lynch, Abigail J. 0000-0001-8449-8392","orcid":"https://orcid.org/0000-0001-8449-8392","contributorId":204271,"corporation":false,"usgs":true,"family":"Lynch","given":"Abigail","middleInitial":"J.","affiliations":[{"id":411,"text":"National Climate Change and Wildlife Science Center","active":true,"usgs":true}],"preferred":true,"id":950156,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Beard, T. Douglas Jr. 0000-0003-2632-2350","orcid":"https://orcid.org/0000-0003-2632-2350","contributorId":245522,"corporation":false,"usgs":true,"family":"Beard","given":"T. Douglas","suffix":"Jr.","affiliations":[{"id":36940,"text":"National Climate Adaptation Science Center","active":true,"usgs":true}],"preferred":true,"id":950157,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Paukert, Craig P. 0000-0002-9369-8545","orcid":"https://orcid.org/0000-0002-9369-8545","contributorId":245524,"corporation":false,"usgs":true,"family":"Paukert","given":"Craig","middleInitial":"P.","affiliations":[{"id":199,"text":"Coop Res Unit Leetown","active":true,"usgs":true}],"preferred":true,"id":950158,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70272100,"text":"70272100 - 2026 - Guidelines for producing integrated 210Pb and 14C age-models","interactions":[],"lastModifiedDate":"2025-12-01T16:51:35.947878","indexId":"70272100","displayToPublicDate":"2025-10-17T08:05:40","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1431,"text":"Earth-Science Reviews","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Guidelines for producing integrated 210Pb and 14C age-models","title":"Guidelines for producing integrated 210Pb and 14C age-models","docAbstract":"

Accurate reconstructions of past environmental changes are crucial in paleoecological research and require reliable chronologies of sedimentary archives. Establishing robust age-models and obtaining the most appropriate proxies for analysis is a complex scientific endeavor, requiring extensive resources and collaboration among specialists, including radiochronologists. Radiometric dating methods, such as 210Pb and radiocarbon (14C), are frequently employed to establish chronologies in aquatic sedimentary deposits and peat bogs. In this study, we review key aspects of sampling, analysis, and the principles underlying 210Pb and 14C age-models, focusing on methods for developing robust joint chronologies for paleoenvironmental research. Drawing largely from the authors' experiences and group discussions during and after a scientific workshop in 2022, we discuss important considerations for site selection, sampling strategies, and radiometric dating to construct integrated 210Pb and 14C age-models. Using expert consensus, this group – called Paleostats – aims to provide a set of best practices for other geochronologists with this methods paper. Among our conclusions, we emphasize the importance of accounting for site-specific factors such as prior information on sedimentation rates to establish appropriate sampling and analytical strategies. The use of appropriate coring devices can minimize disturbance to sediments and ensure the core surface remains intact and preserved until sectioning. Where excess 210Pb is expected, sectioning at intervals of ≤1 cm provides an adequate sampling resolution for 210Pb dating. Exceptions are possible, allowing for ~2–3 cm sections in areas with confirmed high sedimentation rates (e.g., > 1 cm yr−1). Recovering deeper core sections for 14C dating with sufficient overlap allows for accounting errors in depth estimates made in the field. Special attention is advised during time intervals where validation proxies, such as the human-made radionuclides 137Cs or post-bomb 14C, are expected, and to determine the depth of secular equilibrium between 210Pb and 226Ra. Radiocarbon analyses are commonly performed by accelerator mass spectrometry, and age models are constructed mainly using Bayesian statistics with Markov Chain Monte Carlo techniques (e.g., Bacon). A Bayesian approach (Plum) is now available for producing 210Pb age-models, which infers the 210Pbex flux, eliminates the need for selecting an equilibrium depth, and allows dating cores with incomplete 210Pbex inventory. Plum offers improved chronologies by integrating raw 210Pb and 14C data, and these age-models can be enriched with other dating methodologies, such as identifying tephras and other well-recorded historical events. Harmonized reporting would contribute to making radiometric age-models reproducible, which would benefit from an international effort. Using 210Pb and 14C to produce integrated age-models may yield better insights into the interplay between natural and recent anthropogenic forcings on ecosystems. This can enhance our understanding of environmental processes and their impacts on climate change, ultimately supporting science-based assessments and decisions.

","language":"English","publisher":"Elsevier","doi":"10.1016/j.earscirev.2025.105301","usgsCitation":"Sanchez-Cabeza, J., Aquino-López, M.A., Blaauw, M., Ruiz-Fernández, A.C., Jupin, J., Anderson, L., Knight, C.A., Champagne, M.R., Sanderson, N.K., Goring, S., and Christen, J.A., 2026, Guidelines for producing integrated 210Pb and 14C age-models: Earth-Science Reviews, v. 272, 105301, 17 p., https://doi.org/10.1016/j.earscirev.2025.105301.","productDescription":"105301, 17 p.","ipdsId":"IP-170497","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":500562,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1016/j.earscirev.2025.105301","text":"Publisher Index Page"},{"id":496477,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"272","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Sanchez-Cabeza, Joan-Albert","contributorId":346065,"corporation":false,"usgs":false,"family":"Sanchez-Cabeza","given":"Joan-Albert","email":"","affiliations":[{"id":82761,"text":"CIMAT","active":true,"usgs":false}],"preferred":false,"id":950055,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Aquino-López, Marco A. 0000-0002-5076-7205","orcid":"https://orcid.org/0000-0002-5076-7205","contributorId":362121,"corporation":false,"usgs":false,"family":"Aquino-López","given":"Marco","middleInitial":"A.","affiliations":[{"id":86469,"text":"Department of Geography, University of Cambridge","active":true,"usgs":false}],"preferred":false,"id":950056,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Blaauw, Maarten","contributorId":303144,"corporation":false,"usgs":false,"family":"Blaauw","given":"Maarten","affiliations":[{"id":65675,"text":"Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, UK","active":true,"usgs":false}],"preferred":false,"id":950057,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ruiz-Fernández, Ana Carolina 0000-0002-2515-1249","orcid":"https://orcid.org/0000-0002-2515-1249","contributorId":362122,"corporation":false,"usgs":false,"family":"Ruiz-Fernández","given":"Ana","middleInitial":"Carolina","affiliations":[{"id":86470,"text":"1 Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México","active":true,"usgs":false}],"preferred":false,"id":950058,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Jupin, Johanna 0000-0002-3695-9366","orcid":"https://orcid.org/0000-0002-3695-9366","contributorId":362123,"corporation":false,"usgs":false,"family":"Jupin","given":"Johanna","affiliations":[{"id":86472,"text":"Universidad Nacional Autónoma de México, IRD, CNRS, SU, MNHN, IPSL, LOCEAN, Laboratoire d’Océanographie et du Climat: Expérimentation et Approches Numériques, Centre IRD France Nord","active":true,"usgs":false}],"preferred":false,"id":950059,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Anderson, Lysanna 0000-0001-5650-9744 landerson@usgs.gov","orcid":"https://orcid.org/0000-0001-5650-9744","contributorId":5339,"corporation":false,"usgs":true,"family":"Anderson","given":"Lysanna","email":"landerson@usgs.gov","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":950060,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Knight, Clarke Alexandra 0000-0003-0002-6959","orcid":"https://orcid.org/0000-0003-0002-6959","contributorId":288487,"corporation":false,"usgs":true,"family":"Knight","given":"Clarke","email":"","middleInitial":"Alexandra","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":950061,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Champagne, Marie Rhondelle 0000-0001-8236-3910","orcid":"https://orcid.org/0000-0001-8236-3910","contributorId":248214,"corporation":false,"usgs":true,"family":"Champagne","given":"Marie","email":"","middleInitial":"Rhondelle","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":950062,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Sanderson, Nicole K.","contributorId":220279,"corporation":false,"usgs":false,"family":"Sanderson","given":"Nicole","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":950063,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Goring, Simon","contributorId":167180,"corporation":false,"usgs":false,"family":"Goring","given":"Simon","affiliations":[],"preferred":false,"id":950064,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Christen, J. Andrés 0000-0002-5795-4345","orcid":"https://orcid.org/0000-0002-5795-4345","contributorId":362124,"corporation":false,"usgs":false,"family":"Christen","given":"J.","middleInitial":"Andrés","affiliations":[{"id":86474,"text":"Centro de Investigación en Matemáticas, Jalisco S/N","active":true,"usgs":false}],"preferred":false,"id":950065,"contributorType":{"id":1,"text":"Authors"},"rank":11}]}} ,{"id":70272624,"text":"70272624 - 2026 - Subduction zone earthquake catalog separation tool: Implementation in the USGS 2025 Puerto Rico and U.S. Virgin Islands National Seismic Hazard Model","interactions":[],"lastModifiedDate":"2026-02-24T16:16:52.417973","indexId":"70272624","displayToPublicDate":"2025-10-15T09:02:46","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3372,"text":"Seismological Research Letters","onlineIssn":"1938-2057","printIssn":"0895-0695","active":true,"publicationSubtype":{"id":10}},"title":"Subduction zone earthquake catalog separation tool: Implementation in the USGS 2025 Puerto Rico and U.S. Virgin Islands National Seismic Hazard Model","docAbstract":"

The U.S. Geological Survey (USGS) periodically releases updates to National Seismic Hazard Model (NSHM) for the United States and its territories leveraging current scientific knowledge and methodologies to guide public policy, building codes, and risk assessments regarding potential ground shaking due to earthquakes that may result in infrastructure damage. In subduction zones, there is a need to separate the earthquake catalog into tectonic regimes to create specific seismicity models for which the most appropriate ground‐motion models are then applied. Here, we describe newly developed methods and software, called CatSep, that classifies subduction zone events into three primary tectonic regimes: crustal, interface, and intraslab. This method incorporates information about the location of the earthquake relative to the subducting slab, the depth of the Mohorovičić discontinuity, and the earthquake’s moment tensor. Applying this method is a first step in the NSHM workflow for regions covering U.S. subduction zones. Results using this subduction zone earthquake catalog separation tool for the 2025 Puerto Rico and U.S. Virgin Islands NSHM earthquake catalog are presented and analyzed.

","language":"English","publisher":"Seismological Society of America","doi":"10.1785/0220250078","usgsCitation":"Haynie, K.L., Thompson, E.M., Hearne, M., Hayes, G., Shelly, D.R., Shumway, A., Llenos, A.L., Michael, A.J., and Powers, P.M., 2025, Subduction zone earthquake catalog separation tool: Implementation in the USGS 2025 Puerto Rico and U.S. Virgin Islands National Seismic Hazard Model: Seismological Research Letters, https://doi.org/10.1785/0220250078.","productDescription":"10 p.","startPage":"1191","endPage":"1200","ipdsId":"IP-176591","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true},{"id":78686,"text":"Geologic Hazards Science Center - Seismology / Geomagnetism","active":true,"usgs":true}],"links":[{"id":496902,"rank":2,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":496938,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1785/0220250078","text":"Publisher Index Page"}],"country":"United States","otherGeospatial":"Puerto Rico, U.S. Virgin Islands","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -64.54540269325636,\n 17.747116990136433\n ],\n [\n -64.6499913339632,\n 18.348094173225988\n ],\n [\n -64.85462128317253,\n 18.421453174689816\n ],\n [\n -67.97409117555974,\n 18.615487541076746\n ],\n [\n -68.00592250099288,\n 17.851029080316096\n ],\n [\n -65.6958777410323,\n 17.902962398417586\n ],\n [\n -64.80914796112633,\n 17.543447949586422\n ],\n [\n -64.54540269325636,\n 17.747116990136433\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"97","issue":"2A","noUsgsAuthors":false,"publicationDate":"2025-10-15","publicationStatus":"PW","contributors":{"authors":[{"text":"Haynie, Kirstie Lafon 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pmpowers@usgs.gov","orcid":"https://orcid.org/0000-0003-2124-6184","contributorId":176814,"corporation":false,"usgs":true,"family":"Powers","given":"Peter","email":"pmpowers@usgs.gov","middleInitial":"M.","affiliations":[{"id":300,"text":"Geologic Hazards Science Center","active":true,"usgs":true}],"preferred":true,"id":951015,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}} ,{"id":70272299,"text":"70272299 - 2026 - Exploring the exploitation of migratory moths by radio-marked grizzly bears in Wyoming","interactions":[],"lastModifiedDate":"2026-01-05T16:53:12.023227","indexId":"70272299","displayToPublicDate":"2025-10-14T09:17:37","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Exploring the exploitation of migratory moths by radio-marked grizzly bears in Wyoming","docAbstract":"

Grizzly bear (Ursus arctos) feeding on migratory army cutworm moths (Euxoa auxiliaris) was first documented by the Interagency Grizzly Bear Study Team (IGBST) during the early 1980s in the southeastern portion of the Greater Yellowstone Ecosystem (GYE). Since those initial observations, use of this seasonally available food resource by grizzly bears has grown substantially. As of 2023, we have documented 4,754 observations of grizzly bears feeding or digging at high-elevation talus slopes. We used those records to identify 36 unique moth sites in the GYE, assessed geographic characteristics of these sites, and documented chronology and frequency of use by grizzly bears. We used occurrences of radio-collared grizzly bears to identify a sample of bears that foraged at moth sites and investigated characteristics of fidelity, duration, diel activity, and movement patterns. Grizzly bears exhibited high fidelity to specific moth sites within and across years. Bears showed approximately 50% reductions in movement metrics while using sites, albeit with increased activity patterns. Estimates of feeding metrics by females exceeded those of males in intensity and duration of both use and daily activity. Given increasing human impacts and interest in observing this feeding interaction, quantifying metrics that describe the spatial and temporal patterns of moth site use by grizzly bears could be beneficial for future management. Further analyses are needed to fully examine the relationship between caloric influences of moth use on grizzly bear demographic rates.

","language":"English","publisher":"The Wildlife Society","doi":"10.1002/jwmg.70128","usgsCitation":"Clapp, J., Haroldson, M., Dellinger, J.A., Bjornlie, D., Thomposon, D.J., and van Manen, F.T., 2026, Exploring the exploitation of migratory moths by radio-marked grizzly bears in Wyoming: Journal of Wildlife Management, v. 90, no. 1, e70128, 12 p., https://doi.org/10.1002/jwmg.70128.","productDescription":"e70128, 12 p.","ipdsId":"IP-173987","costCenters":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"links":[{"id":496682,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Idaho, Montana, Wyoming","otherGeospatial":"Greater Yellowstone Ecosystem","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -111.60498337614324,\n 45.449960321615094\n ],\n [\n -111.60498337614324,\n 43.279980925896126\n ],\n [\n -107.56773081455422,\n 43.279980925896126\n ],\n [\n -107.56773081455422,\n 45.449960321615094\n ],\n [\n -111.60498337614324,\n 45.449960321615094\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"90","issue":"1","noUsgsAuthors":false,"publicationDate":"2025-10-14","publicationStatus":"PW","contributors":{"authors":[{"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":950722,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Haroldson, Mark 0000-0002-7457-7676","orcid":"https://orcid.org/0000-0002-7457-7676","contributorId":316737,"corporation":false,"usgs":true,"family":"Haroldson","given":"Mark","affiliations":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"preferred":true,"id":950723,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Dellinger, Justin A.","contributorId":362686,"corporation":false,"usgs":false,"family":"Dellinger","given":"Justin","middleInitial":"A.","affiliations":[{"id":36596,"text":"Wyoming Game and Fish Department","active":true,"usgs":false}],"preferred":false,"id":950724,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"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":950725,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Thomposon, Daniel J.","contributorId":362689,"corporation":false,"usgs":false,"family":"Thomposon","given":"Daniel","middleInitial":"J.","affiliations":[{"id":36596,"text":"Wyoming Game and Fish Department","active":true,"usgs":false}],"preferred":false,"id":950726,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"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":950727,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70272605,"text":"70272605 - 2026 - Rallus elegans (King Rail) occupancy is stable, but habitat is in short supply in the Arkansas Delta","interactions":[],"lastModifiedDate":"2026-03-09T14:35:28.484512","indexId":"70272605","displayToPublicDate":"2025-10-13T08:49:03","publicationYear":"2026","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":9101,"text":"Ornithological Applications","printIssn":"0010-5422","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Rallus elegans (King Rail) occupancy is stable, but habitat is in short supply in the Arkansas Delta","title":"Rallus elegans (King Rail) occupancy is stable, but habitat is in short supply in the Arkansas Delta","docAbstract":"

Secretive marsh birds experienced precipitous declines due to losses in wetland habitat across North America. However, from 1998 to 2004, wetland area increased, and between 2009 and 2019, the extent of emergent wetlands did not significantly decrease. This raises the question: how did secretive marsh birds, which are tied to emergent wetlands, respond to this period of relative stability in wetland area? Here, we use Rallus elegans (King Rail) occurrence data collected in 2005, 2006, 2012, and 2017 in the Arkansas Delta in the United States to test the hypothesis that a period of stability in wetland vegetation is linked to stable Rallus elegans occupancy. Specifically, we sought to (1) quantify relationships between R. elegans occupancy and land cover, (2) quantify temporal trends in R. elegans occupancy, and (3) characterize changes in land cover types linked to R. elegans occupancy. We developed spatial multi-season occupancy models, and our top model contained the categorical year effect but showed no trend in R. elegans occupancy between 2005 and 2017, instead showing high interannual variation in occupancy. We found strong associations between R. elegans occupancy and emergent wetlands (positive) and elevation (negative). From 2005 to 2017 in the ∼3.7 million ha Arkansas Delta, rice crop cover decreased by 294,750 ha, emergent wetlands increased by 6,719 ha, and all other cover types increased or decreased by < 7,500 ha. Thus, although emergent wetlands did increase, the total area of emergent wetlands in 2016 (22,262 ha) comprised <1% of the Arkansas Delta. Our results support the hypothesis that R. elegans occupancy stabilized during a time when the main habitat type R. elegans depend on, emergent wetlands, also stabilized in spatial extent. There is an opportunity to turn the tide in R. elegans declines by conserving extant emergent wetlands and creating new emergent wetlands.

","language":"English","publisher":"Oxford Academic","doi":"10.1093/ornithapp/duaf061","usgsCitation":"Roberts, C.P., Novobilsky, J., Akpejeluh, P., Berry, L.L., Budd, M.J., Ferrara, M.C., LaBrie, L.A., Luther, L., Karki, V., Krementz, D., Rowe, K., Shaw, M., Wilson, K., and Fournier, A.M., 2026, Rallus elegans (King Rail) occupancy is stable, but habitat is in short supply in the Arkansas Delta: Ornithological Applications, v. 128, no. 1, p. 1-9, https://doi.org/10.1093/ornithapp/duaf061.","productDescription":"9 p.","startPage":"1","endPage":"9","ipdsId":"IP-174522","costCenters":[{"id":198,"text":"Coop Res Unit Atlanta","active":true,"usgs":true}],"links":[{"id":496829,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Arkansas","otherGeospatial":"Arkansas Delta","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n 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