{"pageNumber":"67","pageRowStart":"1650","pageSize":"25","recordCount":11370,"records":[{"id":70186984,"text":"70186984 - 2017 - A lake-centric geospatial database to guide research and inform management decisions in an Arctic watershed in northern Alaska experiencing climate and land-use changes","interactions":[],"lastModifiedDate":"2017-10-02T12:59:38","indexId":"70186984","displayToPublicDate":"2017-04-19T00:00:00","publicationYear":"2017","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":698,"text":"Ambio","active":true,"publicationSubtype":{"id":10}},"title":"A lake-centric geospatial database to guide research and inform management decisions in an Arctic watershed in northern Alaska experiencing climate and land-use changes","docAbstract":"<p><span>Lakes are dominant and diverse landscape features in the Arctic, but conventional land cover classification schemes typically map them as a single uniform class. Here, we present a detailed lake-centric geospatial database for an Arctic watershed in northern Alaska. We developed a GIS dataset consisting of 4362 lakes that provides information on lake morphometry, hydrologic connectivity, surface area dynamics, surrounding terrestrial ecotypes, and other important conditions describing Arctic lakes. Analyzing the geospatial database relative to fish and bird survey data shows relations to lake depth and hydrologic connectivity, which are being used to guide research and aid in the management of aquatic resources in the National Petroleum Reserve in Alaska. Further development of similar geospatial databases is needed to better understand and plan for the impacts of ongoing climate and land-use changes occurring across lake-rich landscapes in the Arctic.</span></p>","language":"English","publisher":"Springer","doi":"10.1007/s13280-017-0915-9","usgsCitation":"Jones, B.M., Arp, C.D., Whitman, M.S., Nigro, D.A., Nitze, I., Beaver, J., Gadeke, A., Zuck, C., Liljedahl, A.K., Daanen, R., Torvinen, E., Fritz, S., and Grosse, G., 2017, A lake-centric geospatial database to guide research and inform management decisions in an Arctic watershed in northern Alaska experiencing climate and land-use changes: Ambio, v. 46, no. 7, p. 769-786, https://doi.org/10.1007/s13280-017-0915-9.","productDescription":"18 p.","startPage":"769","endPage":"786","ipdsId":"IP-076338","costCenters":[{"id":118,"text":"Alaska Science Center Geography","active":true,"usgs":true}],"links":[{"id":469915,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1007/s13280-017-0915-9","text":"Publisher Index Page"},{"id":438369,"rank":0,"type":{"id":30,"text":"Data Release"},"url":"https://doi.org/10.5066/F7H70CXB","text":"USGS data release","linkHelpText":"Fish Creek Watershed Lake Classification; NPRA, Alaska, 2016"},{"id":339942,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"46","issue":"7","publishingServiceCenter":{"id":12,"text":"Tacoma PSC"},"noUsgsAuthors":false,"publicationDate":"2017-03-25","publicationStatus":"PW","scienceBaseUri":"58f877ace4b0b7ea54521bfc","contributors":{"authors":[{"text":"Jones, Benjamin M. 0000-0002-1517-4711 bjones@usgs.gov","orcid":"https://orcid.org/0000-0002-1517-4711","contributorId":2286,"corporation":false,"usgs":true,"family":"Jones","given":"Benjamin","email":"bjones@usgs.gov","middleInitial":"M.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":118,"text":"Alaska Science Center Geography","active":true,"usgs":true}],"preferred":true,"id":691675,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Arp, Christopher D.","contributorId":17330,"corporation":false,"usgs":false,"family":"Arp","given":"Christopher","email":"","middleInitial":"D.","affiliations":[{"id":6752,"text":"University of Alaska Fairbanks","active":true,"usgs":false}],"preferred":false,"id":691676,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Whitman, Matthew S.","contributorId":67961,"corporation":false,"usgs":false,"family":"Whitman","given":"Matthew","email":"","middleInitial":"S.","affiliations":[{"id":7217,"text":"Bureau of Land Management","active":true,"usgs":false}],"preferred":false,"id":691677,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nigro, Debora A.","contributorId":10628,"corporation":false,"usgs":false,"family":"Nigro","given":"Debora","email":"","middleInitial":"A.","affiliations":[{"id":12934,"text":"Bureau of Land Management, Arctic Field Office","active":true,"usgs":false}],"preferred":false,"id":691678,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Nitze, Ingmar","contributorId":191057,"corporation":false,"usgs":false,"family":"Nitze","given":"Ingmar","affiliations":[],"preferred":false,"id":691679,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Beaver, John","contributorId":191058,"corporation":false,"usgs":false,"family":"Beaver","given":"John","affiliations":[],"preferred":false,"id":691680,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Gadeke, Anne","contributorId":191059,"corporation":false,"usgs":false,"family":"Gadeke","given":"Anne","email":"","affiliations":[],"preferred":false,"id":691681,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Zuck, Callie 0000-0002-7040-6191 czuck@usgs.gov","orcid":"https://orcid.org/0000-0002-7040-6191","contributorId":175209,"corporation":false,"usgs":true,"family":"Zuck","given":"Callie","email":"czuck@usgs.gov","affiliations":[{"id":118,"text":"Alaska Science Center Geography","active":true,"usgs":true}],"preferred":true,"id":691682,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Liljedahl, Anna K. 0000-0001-7114-6443","orcid":"https://orcid.org/0000-0001-7114-6443","contributorId":150135,"corporation":false,"usgs":false,"family":"Liljedahl","given":"Anna","email":"","middleInitial":"K.","affiliations":[{"id":6695,"text":"UAF","active":true,"usgs":false}],"preferred":false,"id":691683,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Daanen, Ronald","contributorId":191060,"corporation":false,"usgs":false,"family":"Daanen","given":"Ronald","email":"","affiliations":[],"preferred":false,"id":691684,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Torvinen, Eric","contributorId":191061,"corporation":false,"usgs":false,"family":"Torvinen","given":"Eric","email":"","affiliations":[],"preferred":false,"id":691685,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Fritz, Stacey","contributorId":176574,"corporation":false,"usgs":false,"family":"Fritz","given":"Stacey","email":"","affiliations":[],"preferred":false,"id":691686,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Grosse, Guido","contributorId":146182,"corporation":false,"usgs":false,"family":"Grosse","given":"Guido","email":"","affiliations":[{"id":12916,"text":"Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam, Germany","active":true,"usgs":false}],"preferred":false,"id":691687,"contributorType":{"id":1,"text":"Authors"},"rank":13}]}}
,{"id":70206543,"text":"70206543 - 2017 - Fracture propagation and stability of ice shelves governed by ice shelf heterogeneity","interactions":[],"lastModifiedDate":"2019-11-08T09:50:36","indexId":"70206543","displayToPublicDate":"2017-04-18T09:47:26","publicationYear":"2017","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1807,"text":"Geophysical Research Letters","active":true,"publicationSubtype":{"id":10}},"title":"Fracture propagation and stability of ice shelves governed by ice shelf heterogeneity","docAbstract":"<p><span>Tabular iceberg calving and ice shelf retreat occurs after full‐thickness fractures, known as rifts, propagate across an ice shelf. A quickly evolving rift signals a threat to the stability of Larsen C, the Antarctic Peninsula's largest ice shelf. Here we reveal the influence of ice shelf heterogeneity on the growth of this rift, with implications that challenge existing notions of ice shelf stability. Most of the rift extension has occurred in bursts after overcoming the resistance of suture zones that bind together neighboring glacier inflows. We model the stresses in the ice shelf to determine potential rift trajectories. Calving perturbations to ice flow will likely reach the grounding line. The stability of Larsen C may hinge on a single suture zone that stabilizes numerous upstream rifts. Elevated fracture toughness of suture zones may be the most important property that allows ice shelves to modulate Antarctica's contribution to sea level rise.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1002/2017GL072648","usgsCitation":"Borstad, C., Mcgrath, D., and Pope, A., 2017, Fracture propagation and stability of ice shelves governed by ice shelf heterogeneity: Geophysical Research Letters, v. 44, no. 9, p. 4186-4194, https://doi.org/10.1002/2017GL072648.","productDescription":"9 p.","startPage":"4186","endPage":"4194","ipdsId":"IP-083481","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":120,"text":"Alaska Science Center Water","active":true,"usgs":true}],"links":[{"id":469918,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1002/2017gl072648","text":"Publisher Index Page"},{"id":369084,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Antarctica","otherGeospatial":"Larsen C Ice Shelf","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -66.1376953125,\n              -74.86788912917916\n            ],\n            [\n              -59.32617187499999,\n              -74.86788912917916\n            ],\n            [\n              -59.32617187499999,\n              -68.62454366344708\n            ],\n            [\n              -66.1376953125,\n              -68.62454366344708\n            ],\n            [\n              -66.1376953125,\n              -74.86788912917916\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"44","issue":"9","publishingServiceCenter":{"id":12,"text":"Tacoma PSC"},"noUsgsAuthors":false,"publicationDate":"2017-05-08","publicationStatus":"PW","contributors":{"authors":[{"text":"Borstad, Chris","contributorId":220412,"corporation":false,"usgs":false,"family":"Borstad","given":"Chris","email":"","affiliations":[{"id":40166,"text":"UNIS","active":true,"usgs":false}],"preferred":false,"id":774921,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mcgrath, Daniel 0000-0002-9462-6842 dmcgrath@usgs.gov","orcid":"https://orcid.org/0000-0002-9462-6842","contributorId":145635,"corporation":false,"usgs":true,"family":"Mcgrath","given":"Daniel","email":"dmcgrath@usgs.gov","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":120,"text":"Alaska Science Center Water","active":true,"usgs":true}],"preferred":true,"id":774920,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Pope, Allen","contributorId":220413,"corporation":false,"usgs":false,"family":"Pope","given":"Allen","email":"","affiliations":[{"id":40167,"text":"NSIDC","active":true,"usgs":false}],"preferred":false,"id":774922,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70186894,"text":"70186894 - 2017 - Low-pathogenic influenza A viruses in North American diving ducks contribute to the emergence of a novel highly pathogenic influenza A(H7N8) virus","interactions":[],"lastModifiedDate":"2018-08-16T21:28:28","indexId":"70186894","displayToPublicDate":"2017-04-13T00:00:00","publicationYear":"2017","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2497,"text":"Journal of Virology","active":true,"publicationSubtype":{"id":10}},"title":"Low-pathogenic influenza A viruses in North American diving ducks contribute to the emergence of a novel highly pathogenic influenza A(H7N8) virus","docAbstract":"<p><span>Introductions of low-pathogenic avian influenza (LPAI) viruses of subtypes H5 and H7 into poultry from wild birds have the potential to mutate to highly pathogenic avian influenza (HPAI) viruses, but such viruses' origins are often unclear. In January 2016, a novel H7N8 HPAI virus caused an outbreak in turkeys in Indiana, USA. To determine the virus's origin, we sequenced the genomes of 441 wild-bird origin influenza A viruses (IAVs) from North America and subjected them to evolutionary analyses. The results showed that the H7N8 LPAI virus most likely circulated among diving ducks in the Mississippi flyway during autumn 2015 and was subsequently introduced to Indiana turkeys, in which it evolved high pathogenicity. Preceding the outbreak, an isolate with six gene segments (PB2, PB1, PA, HA, NA, and NS) sharing &gt;99% sequence identity with those of H7N8 turkey isolates was recovered from a diving duck sampled in Kentucky, USA. H4N8 IAVs from other diving ducks possessed five H7N8-like gene segments (PB2, PB1, NA, MP, and NS; &gt;98% sequence identity). Our findings suggest that viral gene constellations circulating among diving ducks can contribute to the emergence of IAVs that affect poultry. Therefore, diving ducks may serve an important and understudied role in the maintenance, diversification, and transmission of IAVs in the wild-bird reservoir.</span></p>","language":"English","publisher":"American Society for Microbiology","doi":"10.1128/JVI.02208-16","usgsCitation":"Xu, Y., Ramey, A.M., Bowman, A.S., DeLiberto, T.J., Killian, M.L., Krauss, S., Nolting, J.M., Torchetti, M.K., Reeves, A.B., Webby, R.J., Stallknecht, D.E., and Wan, X., 2017, Low-pathogenic influenza A viruses in North American diving ducks contribute to the emergence of a novel highly pathogenic influenza A(H7N8) virus: Journal of Virology, v. 91, no. 9, e02208-16, https://doi.org/10.1128/JVI.02208-16.","productDescription":"e02208-16","ipdsId":"IP-080329","costCenters":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"links":[{"id":469924,"rank":0,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://doi.org/10.1128/jvi.02208-16","text":"External 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WTEB","active":true,"usgs":true}],"preferred":true,"id":690890,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bowman, Andrew S.","contributorId":190853,"corporation":false,"usgs":false,"family":"Bowman","given":"Andrew","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":690893,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"DeLiberto, Thomas J.","contributorId":145606,"corporation":false,"usgs":false,"family":"DeLiberto","given":"Thomas","email":"","middleInitial":"J.","affiliations":[{"id":16167,"text":"7United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Disease Program, 4101 LaPorte Ave., Fort Collins, CO, United States of America.","active":true,"usgs":false}],"preferred":false,"id":690894,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Killian, Mary L.","contributorId":29685,"corporation":false,"usgs":false,"family":"Killian","given":"Mary","email":"","middleInitial":"L.","affiliations":[{"id":6622,"text":"US Department of Agriculture","active":true,"usgs":false}],"preferred":false,"id":690895,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Krauss, Scott","contributorId":190854,"corporation":false,"usgs":false,"family":"Krauss","given":"Scott","email":"","affiliations":[],"preferred":false,"id":690896,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Nolting, Jacqueline M.","contributorId":190855,"corporation":false,"usgs":false,"family":"Nolting","given":"Jacqueline","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":690897,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Torchetti, Mia Kim","contributorId":190856,"corporation":false,"usgs":false,"family":"Torchetti","given":"Mia","email":"","middleInitial":"Kim","affiliations":[],"preferred":false,"id":690898,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Reeves, Andrew B. 0000-0002-7526-0726 areeves@usgs.gov","orcid":"https://orcid.org/0000-0002-7526-0726","contributorId":167362,"corporation":false,"usgs":true,"family":"Reeves","given":"Andrew","email":"areeves@usgs.gov","middleInitial":"B.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":690891,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Webby, Richard J.","contributorId":190857,"corporation":false,"usgs":false,"family":"Webby","given":"Richard","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":690899,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Stallknecht, David E.","contributorId":14323,"corporation":false,"usgs":false,"family":"Stallknecht","given":"David","email":"","middleInitial":"E.","affiliations":[{"id":7125,"text":"Southeastern Cooperative Wildlife Disease Study, College of Veterinary Medicine, University of Georgia, Athens, GA 30602, USA.","active":true,"usgs":false}],"preferred":false,"id":690900,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Wan, Xiu-Feng","contributorId":173959,"corporation":false,"usgs":false,"family":"Wan","given":"Xiu-Feng","email":"","affiliations":[{"id":17848,"text":"Mississippi State University","active":true,"usgs":false}],"preferred":false,"id":690901,"contributorType":{"id":1,"text":"Authors"},"rank":12}]}}
,{"id":70186299,"text":"70186299 - 2017 - Growth of black brant and lesser snow goose goslings in northern Alaska","interactions":[],"lastModifiedDate":"2018-06-12T21:17:47","indexId":"70186299","displayToPublicDate":"2017-04-04T00:00:00","publicationYear":"2017","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":"Growth of black brant and lesser snow goose goslings in northern Alaska","docAbstract":"<p><span>Gosling body mass can affect first year survival, recruitment, adult body size, and future fecundity of geese, and can serve as an indicator of forage availability and quality on brood-rearing areas. From 2012–2014 we measured body mass of 76 black brant (</span><i>Branta bernicla nigricans</i><span>) and 268 lesser snow goose (</span><i>Chen caerulescens caerulescens</i><span>) goslings of known age on the Colville River Delta (CRD) of northern Alaska to determine if there was evidence of density-dependent declines in gosling growth following recent population increases of those species and sympatric greater white-fronted geese (</span><i>Anser albifrons frontalis</i><span>). We contrasted contemporary body mass of brant goslings and forage biomass in brood-rearing habitats that were shared by all species, with measures obtained on, and near the CRD in the 1990s, prior to the establishment of snow goose nesting colonies in the area. Body mass of brant goslings recaptured between 25 and 32 days of age had not changed over the past 2 decades, despite an influx of snow geese, and increases in populations of brant and white-fronted geese. At 30 days of age, body mass of brant goslings on the CRD was 100–400 g heavier than for brant goslings of the same age on the Yukon-Kuskokwim Delta (YKD), Alaska. Contemporary biomass of grazed </span><i>Carex subspathacea</i><span> on CRD brood-rearing areas was comparable to the 1990s and was 2–4 times greater than for the same plant community on the YKD. Historical data on growth of snow goose goslings were not available for the CRD. However, average body mass of 34-day-old snow goose goslings was </span><span class=\"underlined \">&gt;</span><span>230 g heavier than for conspecifics of the same age in the Hudson Bay region. We conclude that the establishment of nesting snow geese on the CRD has not negatively affected brant gosling growth, and that recent population increases of all species have likely not been constrained by forage availability on brood-rearing areas. Barring demographic changes elsewhere in their annual cycles, we predict that goose populations will continue to increase in northern Alaska. However, snow geese are increasing more rapidly than brant in the region. Because the black brant population has periodically been below conservation objectives, the effects of the increasing number of snow geese on forage biomass and growth of brant goslings in northern Alaska should be monitored.</span></p>","language":"English","publisher":"The Wildlife Society","doi":"10.1002/jwmg.21246","usgsCitation":"Hupp, J.W., Ward, D.H., Hogrefe, K.R., Sedinger, J.S., Martin, P.D., Stickney, A.A., and Obritschkewitsch, T., 2017, Growth of black brant and lesser snow goose goslings in northern Alaska: Journal of Wildlife Management, v. 81, no. 5, p. 846-857, https://doi.org/10.1002/jwmg.21246.","productDescription":"12 p.","startPage":"846","endPage":"857","ipdsId":"IP-075920","costCenters":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"links":[{"id":461647,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1002/jwmg.21246","text":"Publisher Index Page"},{"id":438386,"rank":0,"type":{"id":30,"text":"Data Release"},"url":"https://doi.org/10.5066/F72J692N","text":"USGS data release","linkHelpText":"Goose Mass and Vegetation Data, Colville River Delta, Alaska, 2012-2017"},{"id":339123,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -151.2542724609375,\n              70.16740535023168\n            ],\n            [\n              -150.16387939453125,\n              70.16740535023168\n            ],\n            [\n              -150.16387939453125,\n              70.50107496275737\n            ],\n            [\n              -151.2542724609375,\n              70.50107496275737\n            ],\n            [\n              -151.2542724609375,\n              70.16740535023168\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"81","issue":"5","publishingServiceCenter":{"id":12,"text":"Tacoma PSC"},"noUsgsAuthors":false,"publicationDate":"2017-03-11","publicationStatus":"PW","scienceBaseUri":"58e4b0b0e4b09da679997772","chorus":{"doi":"10.1002/jwmg.21246","url":"http://dx.doi.org/10.1002/jwmg.21246","publisher":"Wiley-Blackwell","authors":"Hupp Jerry W., Ward David H., Hogrefe Kyle R., Sedinger James S., Martin Philip D., Stickney Alice A., Obritschkewitsch Tim","journalName":"The Journal of Wildlife Management","publicationDate":"3/2017","publiclyAccessibleDate":"3/11/2017"},"contributors":{"authors":[{"text":"Hupp, Jerry W. 0000-0002-6439-3910 jhupp@usgs.gov","orcid":"https://orcid.org/0000-0002-6439-3910","contributorId":127803,"corporation":false,"usgs":true,"family":"Hupp","given":"Jerry","email":"jhupp@usgs.gov","middleInitial":"W.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":688256,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ward, David H. 0000-0002-5242-2526 dward@usgs.gov","orcid":"https://orcid.org/0000-0002-5242-2526","contributorId":3247,"corporation":false,"usgs":true,"family":"Ward","given":"David","email":"dward@usgs.gov","middleInitial":"H.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":688257,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hogrefe, Kyle R. 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,{"id":70186294,"text":"70186294 - 2017 - The Beringian coevolution project: Holistic collections of mammals and associated parasites reveal novel perspectives on evolutionary and environmental change in the North","interactions":[],"lastModifiedDate":"2018-06-12T20:57:26","indexId":"70186294","displayToPublicDate":"2017-04-04T00:00:00","publicationYear":"2017","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":5363,"text":"Arctic Science","active":true,"publicationSubtype":{"id":10}},"title":"The Beringian coevolution project: Holistic collections of mammals and associated parasites reveal novel perspectives on evolutionary and environmental change in the North","docAbstract":"The Beringian Coevolution Project (BCP), a field program underway in the high northern latitudes since 1999, has focused on building key scientific infrastructure for integrated specimen-based studies on mammals and their associated parasites. BCP has contributed new insights across temporal and spatial scales into how ancient climate and environmental change have shaped faunas, emphasizing processes of assembly, persistence, and diversification across the vast Beringian region. BCP collections also represent baseline records of biotic diversity from across the northern high latitudes at a time of accelerated environmental change. These specimens and associated data form an unmatched resource for identifying hidden diversity, interpreting past responses to climate oscillations, documenting contemporary conditions, and anticipating outcomes for complex biological systems in a regime of ecological perturbation. Because of its dual focus on hosts and parasites, the BCP record also provides a foundation for comparative analyses that can document the effects of dynamic change on the geographic distribution, transmission dynamics, and emergence of pathogens. By using specific examples from carnivores, shrews, lagomorphs, rodents and their associated parasites, we demonstrate how broad, integrated field collections provide permanent infrastructure that informs policy decisions regarding human impact and the effect of climate change on natural populations.","language":"English","publisher":"NRC Research Press","doi":"10.1139/AS-2016-0042","usgsCitation":"Cook, J.A., Galbreath, K.E., Campbell, M., Carriere, S., Colella, J.P., Dawson, N.G., Dunnum, J.L., Eckerlin, R.P., Greiman, S.E., Fedorov, V.B., Haas, G.M., Haukisalmi, V., Henttonen, H., Hope, A.G., Jackson, D., Jung, T., Koehler, A.V., Kinsella, J.M., Krejsa, D., Kutz, S.J., Liphardt, S., MacDonald, S.O., Malaney, J.L., Makarikov, A., Martin, J., McLean, B.S., Mulders, R., Nyamsuren, B., Talbot, S.L., Tkach, V.V., Tsvetkova, A., Toman, H.M., Waltari, E.C., Whitman, J.S., and Hoberg, E.P., 2017, The Beringian coevolution project: Holistic collections of mammals and associated parasites reveal novel perspectives on evolutionary and environmental change in the North: Arctic Science, v. 3, no. 3, p. 585-617, https://doi.org/10.1139/AS-2016-0042.","productDescription":"33 p.","startPage":"585","endPage":"617","ipdsId":"IP-079785","costCenters":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"links":[{"id":469947,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1139/as-2016-0042","text":"Publisher Index Page"},{"id":339130,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"3","issue":"3","publishingServiceCenter":{"id":12,"text":"Tacoma PSC"},"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58e4b0b1e4b09da679997776","contributors":{"authors":[{"text":"Cook, Joseph A.","contributorId":8323,"corporation":false,"usgs":false,"family":"Cook","given":"Joseph","email":"","middleInitial":"A.","affiliations":[{"id":7000,"text":"Department of Biology, University of New Mexico","active":true,"usgs":false}],"preferred":false,"id":688188,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Galbreath, Kurt E.","contributorId":48867,"corporation":false,"usgs":true,"family":"Galbreath","given":"Kurt","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":688189,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Campbell, Mariel","contributorId":190330,"corporation":false,"usgs":false,"family":"Campbell","given":"Mariel","email":"","affiliations":[],"preferred":false,"id":688190,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Carriere, Susanne","contributorId":190331,"corporation":false,"usgs":false,"family":"Carriere","given":"Susanne","email":"","affiliations":[],"preferred":false,"id":688191,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Colella, Jocelyn P.","contributorId":190332,"corporation":false,"usgs":false,"family":"Colella","given":"Jocelyn","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":688192,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Dawson, Natalie G.","contributorId":190333,"corporation":false,"usgs":false,"family":"Dawson","given":"Natalie","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":688193,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Dunnum, Jonathan L.","contributorId":190334,"corporation":false,"usgs":false,"family":"Dunnum","given":"Jonathan","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":688194,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Eckerlin, Ralph P.","contributorId":190335,"corporation":false,"usgs":false,"family":"Eckerlin","given":"Ralph","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":688195,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Greiman, Stephen E.","contributorId":190336,"corporation":false,"usgs":false,"family":"Greiman","given":"Stephen","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":688196,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Fedorov, Vadim B.","contributorId":190337,"corporation":false,"usgs":false,"family":"Fedorov","given":"Vadim","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":688197,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Haas, Genevieve M. 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,{"id":70186298,"text":"70186298 - 2017 - Genetic structure among greater white-fronted goose populations of the Pacific Flyway","interactions":[],"lastModifiedDate":"2017-05-08T15:59:17","indexId":"70186298","displayToPublicDate":"2017-04-04T00:00:00","publicationYear":"2017","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1467,"text":"Ecology and Evolution","active":true,"publicationSubtype":{"id":10}},"title":"Genetic structure among greater white-fronted goose populations of the Pacific Flyway","docAbstract":"<p><span>An understanding of the genetic structure of populations in the wild is essential for long-term conservation and stewardship in the face of environmental change. Knowledge of the present-day distribution of genetic lineages (phylogeography) of a species is especially important for organisms that are exploited or utilize habitats that may be jeopardized by human intervention, including climate change. Here, we describe mitochondrial (mtDNA) and nuclear genetic (microsatellite) diversity among three populations of a migratory bird, the greater white-fronted goose (</span><i>Anser albifrons</i><span>), which breeds discontinuously in western and southwestern Alaska and winters in the Pacific Flyway of North America. Significant genetic structure was evident at both marker types. All three populations were differentiated for mtDNA, whereas microsatellite analysis only differentiated geese from the Cook Inlet Basin. In sexual reproducing species, nonrandom mate selection, when occurring in concert with fine-scale resource partitioning, can lead to phenotypic and genetic divergence as we observed in our study. If mate selection does not occur at the time of reproduction, which is not uncommon in long-lived organisms, then mechanisms influencing the true availability of potential mates may be obscured, and the degree of genetic and phenotypic diversity may appear incongruous with presumed patterns of gene flow. Previous investigations revealed population-specific behavioral, temporal, and spatial mechanisms that likely influence the amount of gene flow measured among greater white-fronted goose populations. The degree of observed genetic structuring aligns well with our current understanding of population differences pertaining to seasonal movements, social structure, pairing behavior, and resource partitioning.</span></p>","language":"English","publisher":"Wiley","doi":"10.1002/ece3.2934","usgsCitation":"Ely, C.R., Wilson, R.E., and Talbot, S.L., 2017, Genetic structure among greater white-fronted goose populations of the Pacific Flyway: Ecology and Evolution, v. 7, no. 9, p. 2956-2968, https://doi.org/10.1002/ece3.2934.","productDescription":"23 p.","startPage":"2956","endPage":"2968","ipdsId":"IP-077907","costCenters":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"links":[{"id":469949,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1002/ece3.2934","text":"Publisher Index Page"},{"id":339124,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"7","issue":"9","publishingServiceCenter":{"id":12,"text":"Tacoma PSC"},"noUsgsAuthors":false,"publicationDate":"2017-03-22","publicationStatus":"PW","scienceBaseUri":"58e4b0b1e4b09da679997774","contributors":{"authors":[{"text":"Ely, Craig R. 0000-0003-4262-0892 cely@usgs.gov","orcid":"https://orcid.org/0000-0003-4262-0892","contributorId":3214,"corporation":false,"usgs":true,"family":"Ely","given":"Craig","email":"cely@usgs.gov","middleInitial":"R.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":688253,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wilson, Robert E. 0000-0003-1800-0183 rewilson@usgs.gov","orcid":"https://orcid.org/0000-0003-1800-0183","contributorId":5718,"corporation":false,"usgs":true,"family":"Wilson","given":"Robert","email":"rewilson@usgs.gov","middleInitial":"E.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":688254,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Talbot, Sandra L. 0000-0002-3312-7214 stalbot@usgs.gov","orcid":"https://orcid.org/0000-0002-3312-7214","contributorId":140512,"corporation":false,"usgs":true,"family":"Talbot","given":"Sandra","email":"stalbot@usgs.gov","middleInitial":"L.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":688255,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70186291,"text":"70186291 - 2017 - Geographic and temporal patterns of variation in total mercury concentrations in blood of harlequin ducks and blue mussels from Alaska","interactions":[],"lastModifiedDate":"2017-04-03T14:50:29","indexId":"70186291","displayToPublicDate":"2017-04-03T00:00:00","publicationYear":"2017","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2676,"text":"Marine Pollution Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Geographic and temporal patterns of variation in total mercury concentrations in blood of harlequin ducks and blue mussels from Alaska","docAbstract":"<p><span>We compared total mercury (Hg) concentrations in whole blood of harlequin ducks (</span><i>Histrionicus histrionicus</i><span>) sampled within and among two geographically distinct locations and across three years in southwest Alaska. Blue mussels were collected to assess correlation between Hg concentrations in locally available forage and birds. Mercury concentrations in harlequin duck blood were significantly higher at Unalaska Island (0.31&nbsp;±&nbsp;0.19 mean&nbsp;±&nbsp;SD, μg/g blood) than Kodiak Island (0.04&nbsp;±&nbsp;0.02 mean&nbsp;±&nbsp;SD, μg/g blood). We found no evidence for annual variation in blood Hg concentration between years at Unalaska Island. However, blood Hg concentration did vary among specific sampling locations (i.e., bays) at Unalaska Island. Findings from this study demonstrate harlequin ducks are exposed to environmental sources of Hg, and whole blood Hg concentrations are associated with their local food source.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.marpolbul.2017.01.084","usgsCitation":"Savoy, L., Flint, P.L., Zwiefelhofer, D., Brant, H., Perkins, C.R., Taylor, R.J., Lane, O.P., Hall, J.S., Evers, D.C., and Schamber, J., 2017, Geographic and temporal patterns of variation in total mercury concentrations in blood of harlequin ducks and blue mussels from Alaska: Marine Pollution Bulletin, v. 117, no. 1-2, p. 178-183, https://doi.org/10.1016/j.marpolbul.2017.01.084.","productDescription":"6 p.","startPage":"178","endPage":"183","ipdsId":"IP-078778","costCenters":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"links":[{"id":339076,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United 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Panama","active":true,"usgs":false}],"preferred":false,"id":688177,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Evers, David C.","contributorId":96160,"corporation":false,"usgs":false,"family":"Evers","given":"David","email":"","middleInitial":"C.","affiliations":[{"id":6928,"text":"BioDiversity Research Institute, Gorham, ME 04038","active":true,"usgs":false}],"preferred":false,"id":688178,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Schamber, Jason","contributorId":190328,"corporation":false,"usgs":false,"family":"Schamber","given":"Jason","affiliations":[],"preferred":false,"id":688179,"contributorType":{"id":1,"text":"Authors"},"rank":10}]}}
,{"id":70198633,"text":"70198633 - 2017 - Geometry, mass balance and thinning at Eklutna Glacier, Alaska: an altitude-mass-balance feedback with implications for water resources","interactions":[],"lastModifiedDate":"2018-08-14T13:36:15","indexId":"70198633","displayToPublicDate":"2017-04-01T13:36:07","publicationYear":"2017","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2328,"text":"Journal of Glaciology","active":true,"publicationSubtype":{"id":10}},"title":"Geometry, mass balance and thinning at Eklutna Glacier, Alaska: an altitude-mass-balance feedback with implications for water resources","docAbstract":"<p><span>We analyzed glacier surface elevations (1957, 2010 and 2015) and surface mass-balance measurements (2008–2015) on the 30 km</span><span class=\"sup\">2</span><span>&nbsp;Eklutna Glacier, in the Chugach Mountains of southcentral Alaska. The geodetic mass balances from 1957 to 2010 and 2010 to 2015 are −0.52 ± 0.46 and −0.74 ± 0.10 m w.e. a</span><span class=\"sup\">−1</span><span>, respectively. The glaciological mass balance of −0.73 m w.e. a</span><span class=\"sup\">−1</span><span>&nbsp;from 2010 to 2015 is indistinguishable from the geodetic value. Even after accounting for loss of firn in the accumulation zone, we found most of the mass loss over both time periods was from a broad, low-slope basin that includes much of the accumulation zone of the main branch. Ice-equivalent surface elevation changes in the basin were −1.0 ± 0.8 m a</span><span class=\"sup\">−1</span><span>&nbsp;from 1957 to 2010, and −0.6 ± 0.1 m a</span><span class=\"sup\">−1</span><span>&nbsp;from 2010 to 2015, shifting the glacier hypsometry downward and resulting in more negative mass balances: an altitude-mass-balance feedback. Net mass loss from Eklutna Glacier accounts for 7 ± 1% of the average inflow to Eklutna Reservoir, which is entirely used for water and power by Anchorage, Alaska's largest city. If the altitude-mass-balance feedback continues, this ‘deglaciation discharge dividend’ is likely to increase over the short-term before it eventually decreases due to diminishing glacier area.</span></p>","language":"English","publisher":"Cambridge University Press","doi":"10.1017/jog.2016.146","usgsCitation":"Sass, L., Loso, M.G., Geck, J., Thoms, E., and Mcgrath, D., 2017, Geometry, mass balance and thinning at Eklutna Glacier, Alaska: an altitude-mass-balance feedback with implications for water resources: Journal of Glaciology, v. 63, no. 238, p. 343-354, https://doi.org/10.1017/jog.2016.146.","productDescription":"12 p.","startPage":"343","endPage":"354","ipdsId":"IP-075520","costCenters":[{"id":120,"text":"Alaska Science Center Water","active":true,"usgs":true}],"links":[{"id":469956,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1017/jog.2016.146","text":"Publisher Index Page"},{"id":438399,"rank":0,"type":{"id":30,"text":"Data Release"},"url":"https://doi.org/10.5066/F7MP51CB","text":"USGS data release","linkHelpText":"Point Measurements of Surface Mass Balance, Eklutna Glacier, Alaska, 2008-2015"},{"id":356437,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Eklutna Glacier","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -149.07485961914062,\n              61.16824528169757\n            ],\n            [\n              -148.91006469726562,\n              61.16824528169757\n            ],\n            [\n              -148.91006469726562,\n              61.28425704516601\n            ],\n            [\n              -149.07485961914062,\n              61.28425704516601\n            ],\n            [\n              -149.07485961914062,\n              61.16824528169757\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"63","issue":"238","publishingServiceCenter":{"id":12,"text":"Tacoma PSC"},"noUsgsAuthors":false,"publicationDate":"2017-01-25","publicationStatus":"PW","scienceBaseUri":"5b98a463e4b0702d0e84307f","contributors":{"authors":[{"text":"Sass, Louis C. 0000-0003-4677-029X lsass@usgs.gov","orcid":"https://orcid.org/0000-0003-4677-029X","contributorId":3555,"corporation":false,"usgs":true,"family":"Sass","given":"Louis C.","email":"lsass@usgs.gov","affiliations":[{"id":120,"text":"Alaska Science Center Water","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":742299,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Loso, Michael G.","contributorId":146361,"corporation":false,"usgs":false,"family":"Loso","given":"Michael","email":"","middleInitial":"G.","affiliations":[{"id":12915,"text":"Alaska Pacific University","active":true,"usgs":false}],"preferred":false,"id":742300,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Geck, Jason","contributorId":177441,"corporation":false,"usgs":false,"family":"Geck","given":"Jason","email":"","affiliations":[],"preferred":false,"id":742301,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Thoms, Evan 0000-0002-8945-613X ethoms@usgs.gov","orcid":"https://orcid.org/0000-0002-8945-613X","contributorId":206949,"corporation":false,"usgs":true,"family":"Thoms","given":"Evan","email":"ethoms@usgs.gov","affiliations":[{"id":120,"text":"Alaska Science Center Water","active":true,"usgs":true}],"preferred":true,"id":742302,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Mcgrath, Daniel 0000-0002-9462-6842 dmcgrath@usgs.gov","orcid":"https://orcid.org/0000-0002-9462-6842","contributorId":145635,"corporation":false,"usgs":true,"family":"Mcgrath","given":"Daniel","email":"dmcgrath@usgs.gov","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":120,"text":"Alaska Science Center Water","active":true,"usgs":true}],"preferred":true,"id":742303,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70196236,"text":"70196236 - 2017 - Reassortment of influenza A viruses in wild birds in Alaska before H5 Clade 2.3.4.4 Outbreaks","interactions":[],"lastModifiedDate":"2018-03-27T16:26:00","indexId":"70196236","displayToPublicDate":"2017-04-01T00:00:00","publicationYear":"2017","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1493,"text":"Emerging Infectious Diseases","active":true,"publicationSubtype":{"id":10}},"title":"Reassortment of influenza A viruses in wild birds in Alaska before H5 Clade 2.3.4.4 Outbreaks","docAbstract":"<p><span>Sampling of mallards in Alaska during September 2014–April 2015 identified low pathogenic avian influenza A virus (subtypes H5N2 and H1N1) that shared ancestry with highly pathogenic reassortant H5N2 and H5N1 viruses. Molecular dating indicated reassortment soon after interhemispheric movement of H5N8 clade 2.3.4.4, suggesting genetic exchange in Alaska or surrounds before outbreaks.</span></p>","language":"English","publisher":"Centers for Disease Control and Prevention","doi":"10.3201/eid2304.161668","usgsCitation":"Hill, N.J., Hussein, I., Davis, K.R., Ma, E.J., Spivey, T.J., Ramey, A.M., Puryear, W.B., Das, S.R., Halpin, R.A., Lin, X., Federova, N.B., Suarez, D.L., Boyce, W.M., and Runstadler, J.A., 2017, Reassortment of influenza A viruses in wild birds in Alaska before H5 Clade 2.3.4.4 Outbreaks: Emerging Infectious Diseases, v. 23, no. 4, p. 654-657, https://doi.org/10.3201/eid2304.161668.","productDescription":"4 p.","startPage":"654","endPage":"657","ipdsId":"IP-080484","costCenters":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"links":[{"id":469972,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3201/eid2304.161668","text":"Publisher Index Page"},{"id":352804,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"4","publishingServiceCenter":{"id":12,"text":"Tacoma PSC"},"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5afee89fe4b0da30c1bfc47f","contributors":{"authors":[{"text":"Hill, Nichola J.","contributorId":189563,"corporation":false,"usgs":false,"family":"Hill","given":"Nichola","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":731792,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hussein, Islam T. M.","contributorId":203564,"corporation":false,"usgs":false,"family":"Hussein","given":"Islam T. M.","affiliations":[{"id":12444,"text":"Massachusetts Institute of Technology","active":true,"usgs":false}],"preferred":false,"id":731793,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Davis, Kimberly R.","contributorId":203565,"corporation":false,"usgs":false,"family":"Davis","given":"Kimberly","email":"","middleInitial":"R.","affiliations":[{"id":12444,"text":"Massachusetts Institute of Technology","active":true,"usgs":false}],"preferred":false,"id":731794,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ma, Eric J.","contributorId":177788,"corporation":false,"usgs":false,"family":"Ma","given":"Eric","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":731795,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Spivey, Timothy J. 0000-0003-2735-2770 tspivey@usgs.gov","orcid":"https://orcid.org/0000-0003-2735-2770","contributorId":198763,"corporation":false,"usgs":true,"family":"Spivey","given":"Timothy","email":"tspivey@usgs.gov","middleInitial":"J.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":731791,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Ramey, Andrew M. 0000-0002-3601-8400 aramey@usgs.gov","orcid":"https://orcid.org/0000-0002-3601-8400","contributorId":1872,"corporation":false,"usgs":true,"family":"Ramey","given":"Andrew","email":"aramey@usgs.gov","middleInitial":"M.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":731790,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Puryear, Wendy Blay","contributorId":174238,"corporation":false,"usgs":false,"family":"Puryear","given":"Wendy","email":"","middleInitial":"Blay","affiliations":[{"id":12444,"text":"Massachusetts Institute of Technology","active":true,"usgs":false}],"preferred":false,"id":731796,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Das, Suman R.","contributorId":203566,"corporation":false,"usgs":false,"family":"Das","given":"Suman","email":"","middleInitial":"R.","affiliations":[{"id":36656,"text":"Vanderbilt University","active":true,"usgs":false}],"preferred":false,"id":731797,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Halpin, Rebecca A.","contributorId":203567,"corporation":false,"usgs":false,"family":"Halpin","given":"Rebecca","email":"","middleInitial":"A.","affiliations":[{"id":36657,"text":"J. Craig Venter Institute","active":true,"usgs":false}],"preferred":false,"id":731798,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Lin, Xudong","contributorId":203568,"corporation":false,"usgs":false,"family":"Lin","given":"Xudong","email":"","affiliations":[{"id":36657,"text":"J. Craig Venter Institute","active":true,"usgs":false}],"preferred":false,"id":731799,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Federova, Nadia B.","contributorId":203569,"corporation":false,"usgs":false,"family":"Federova","given":"Nadia","email":"","middleInitial":"B.","affiliations":[{"id":36657,"text":"J. Craig Venter Institute","active":true,"usgs":false}],"preferred":false,"id":731800,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Suarez, David L.","contributorId":203570,"corporation":false,"usgs":false,"family":"Suarez","given":"David","email":"","middleInitial":"L.","affiliations":[{"id":36658,"text":"U.S. Department of Agriculture","active":true,"usgs":false}],"preferred":false,"id":731801,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Boyce, Walter M.","contributorId":189564,"corporation":false,"usgs":false,"family":"Boyce","given":"Walter","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":731802,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Runstadler, Jonathan A.","contributorId":203571,"corporation":false,"usgs":false,"family":"Runstadler","given":"Jonathan","email":"","middleInitial":"A.","affiliations":[{"id":12444,"text":"Massachusetts Institute of Technology","active":true,"usgs":false}],"preferred":false,"id":731803,"contributorType":{"id":1,"text":"Authors"},"rank":14}]}}
,{"id":70193334,"text":"70193334 - 2017 - The 3.6 ka Aniakchak tephra in the Arctic Ocean: A constraint on the Holocene radiocarbon reservoir age in the Chukchi Sea ","interactions":[],"lastModifiedDate":"2017-10-31T15:52:26","indexId":"70193334","displayToPublicDate":"2017-04-01T00:00:00","publicationYear":"2017","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1250,"text":"Climate of the Past","active":true,"publicationSubtype":{"id":10}},"title":"The 3.6 ka Aniakchak tephra in the Arctic Ocean: A constraint on the Holocene radiocarbon reservoir age in the Chukchi Sea ","docAbstract":"<p><span class=\"pb_abstract\">The caldera-forming eruption of the Aniakchak volcano in the Aleutian Range on the Alaskan Peninsula at 3.6 cal kyr BP was one of the largest Holocene eruptions worldwide. The resulting ash is found as a visible sediment layer in several Alaskan sites and as a cryptotephra on Newfoundland and Greenland. This large geographic distribution, combined with the fact that the eruption is relatively well constrained in time using radiocarbon dating of lake sediments and annual layer counts in ice cores, makes it an excellent stratigraphic marker for dating and correlating mid–late Holocene sediment and paleoclimate records. This study presents the outcome of a targeted search for the Aniakchak tephra in a marine sediment core from the Arctic Ocean, namely Core SWERUS-L2-2-PC1 (2PC), raised from 57 m water depth in Herald Canyon, western Chukchi Sea. High concentrations of tephra shards, with a geochemical signature matching that of Aniakchak ash, were observed across a more than 1.5 m long sediment sequence. Since the primary input of volcanic ash is through atmospheric transport, and assuming that bioturbation can account for mixing up to ca. 10 cm of the marine sediment deposited at the coring site, the broad signal is interpreted as sustained reworking at the sediment source input. The isochron is therefore placed at the base of the sudden increase in tephra concentrations rather than at the maximum concentration. This interpretation of major reworking is strengthened by analysis of grain size distribution which points to ice rafting as an important secondary transport mechanism of volcanic ash. Combined with radiocarbon dates on mollusks in the same sediment core, the volcanic marker is used to calculate a marine radiocarbon reservoir age offset Δ<i>R</i> = 477 ± 60&nbsp;years. This relatively high value may be explained by the major influence of typically \"carbon-old\" Pacific waters, and it agrees well with recent estimates of Δ<i>R</i> along the northwest Alaskan coast, possibly indicating stable oceanographic conditions during the second half of the Holocene. Our use of a volcanic absolute age marker to obtain the marine reservoir age offset is the first of its kind in the Arctic Ocean and provides an important framework for improving chronologies and correlating marine sediment archives in this region. Core 2PC has a high sediment accumulation rate averaging 200 cm kyr throughout the last 4000&nbsp;years, and the chronology presented here provides a solid base for high-resolution reconstructions of late Holocene climate and ocean variability in the Chukchi Sea.</span></p>","language":"English","publisher":"European Geosciences Union","doi":"10.5194/cp-13-303-2017","usgsCitation":"Pearce, C., Varhelyi, A., Wastegard, S., Muschitiello, F., Barrientos Macho, N., O’Regan, M., Cronin, T.M., Gemery, L., Semiletov, I., Backman, J., and Jakobsson, M., 2017, The 3.6 ka Aniakchak tephra in the Arctic Ocean: A constraint on the Holocene radiocarbon reservoir age in the Chukchi Sea : Climate of the Past, v. 13, p. 303-316, https://doi.org/10.5194/cp-13-303-2017.","productDescription":"14 p.","startPage":"303","endPage":"316","ipdsId":"IP-081754","costCenters":[{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"links":[{"id":469959,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.5194/cp-13-303-2017","text":"Publisher Index Page"},{"id":347928,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Russia, United States","state":"Alaska","otherGeospatial":"Chukchi Sea","volume":"13","publishingServiceCenter":{"id":9,"text":"Reston PSC"},"noUsgsAuthors":false,"publicationDate":"2017-04-05","publicationStatus":"PW","scienceBaseUri":"59f98bb8e4b0531197af9ff7","contributors":{"authors":[{"text":"Pearce, Christof","contributorId":197126,"corporation":false,"usgs":false,"family":"Pearce","given":"Christof","email":"","affiliations":[{"id":25421,"text":"Department of Geological Sciences, Stockholm University, Sweden","active":true,"usgs":false}],"preferred":false,"id":718726,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Varhelyi, Aron","contributorId":199345,"corporation":false,"usgs":false,"family":"Varhelyi","given":"Aron","email":"","affiliations":[{"id":25421,"text":"Department of Geological Sciences, Stockholm University, Sweden","active":true,"usgs":false}],"preferred":false,"id":718727,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wastegard, Stefan","contributorId":199346,"corporation":false,"usgs":false,"family":"Wastegard","given":"Stefan","email":"","affiliations":[{"id":25546,"text":"Stockholm University, Sweden","active":true,"usgs":false}],"preferred":false,"id":718728,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Muschitiello, Francesco","contributorId":199347,"corporation":false,"usgs":false,"family":"Muschitiello","given":"Francesco","email":"","affiliations":[{"id":25546,"text":"Stockholm University, Sweden","active":true,"usgs":false}],"preferred":false,"id":718729,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Barrientos Macho, Natalia","contributorId":199348,"corporation":false,"usgs":false,"family":"Barrientos Macho","given":"Natalia","email":"","affiliations":[{"id":24562,"text":"Stockholm University","active":true,"usgs":false}],"preferred":false,"id":718730,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"O’Regan, Matt","contributorId":197135,"corporation":false,"usgs":false,"family":"O’Regan","given":"Matt","email":"","affiliations":[{"id":25421,"text":"Department of Geological Sciences, Stockholm University, Sweden","active":true,"usgs":false}],"preferred":false,"id":718731,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Cronin, Thomas M. 0000-0002-2643-0979 tcronin@usgs.gov","orcid":"https://orcid.org/0000-0002-2643-0979","contributorId":2579,"corporation":false,"usgs":true,"family":"Cronin","given":"Thomas","email":"tcronin@usgs.gov","middleInitial":"M.","affiliations":[{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true},{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"preferred":true,"id":718725,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Gemery, Laura 0000-0003-1966-8732 lgemery@usgs.gov","orcid":"https://orcid.org/0000-0003-1966-8732","contributorId":5402,"corporation":false,"usgs":true,"family":"Gemery","given":"Laura","email":"lgemery@usgs.gov","affiliations":[{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true},{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true}],"preferred":true,"id":718732,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Semiletov, Igor","contributorId":197134,"corporation":false,"usgs":false,"family":"Semiletov","given":"Igor","email":"","affiliations":[{"id":35519,"text":"Russian Academy Sciences, Vladivostok, Russia","active":true,"usgs":false},{"id":24563,"text":"Tomsk Polytechnic University","active":true,"usgs":false}],"preferred":false,"id":718782,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Backman, Jan","contributorId":166857,"corporation":false,"usgs":false,"family":"Backman","given":"Jan","email":"","affiliations":[{"id":24562,"text":"Stockholm University","active":true,"usgs":false}],"preferred":false,"id":718783,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Jakobsson, Martin","contributorId":166854,"corporation":false,"usgs":false,"family":"Jakobsson","given":"Martin","email":"","affiliations":[{"id":24562,"text":"Stockholm University","active":true,"usgs":false}],"preferred":false,"id":718784,"contributorType":{"id":1,"text":"Authors"},"rank":11}]}}
,{"id":70189463,"text":"70189463 - 2017 - A global threats overview for Numeniini populations: synthesising expert knowledge for a group of declining migratory birds.","interactions":[],"lastModifiedDate":"2018-01-07T16:57:34","indexId":"70189463","displayToPublicDate":"2017-03-31T00:00:00","publicationYear":"2017","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1048,"text":"Bird Conservation International","active":true,"publicationSubtype":{"id":10}},"title":"A global threats overview for Numeniini populations: synthesising expert knowledge for a group of declining migratory birds.","docAbstract":"The Numeniini is a tribe of 13 wader species (Scolopacidae, Charadriiformes) of which seven are Near Threatened or globally threatened, including two Critically Endangered. To help inform conservation management and policy responses, we present the results of an expert assessment of the threats that members of this taxonomic group face across migratory flyways. Most threats are increasing in intensity, particularly in non-breeding areas, where habitat loss resulting from residential and commercial development, aquaculture, mining, transport, disturbance, problematic invasive species, pollution and climate change were regarded as having the greatest detrimental impact. Fewer threats (mining, disturbance, problematic native species and climate change) were identified as widely affecting breeding areas. Numeniini populations face the greatest number of non-breeding threats in the East Asian-Australasian Flyway, especially those associated with coastal reclamation; related threats were also identified across the Central and Atlantic Americas, and East Atlantic flyways. Threats on the breeding grounds were greatest in Central and Atlantic Americas, East Atlantic and West Asian flyways. Three priority actions were associated with monitoring and research: to monitor breeding population trends (which for species breeding in remote areas may best be achieved through surveys at key non-breeding sites), to deploy tracking technologies to identify migratory connectivity, and to monitor land-cover change across breeding and non-breeding areas. Two priority actions were focused on conservation and policy responses: to identify and effectively protect key non-breeding sites across all flyways (particularly in the East Asian- Australasian Flyway), and to implement successful conservation interventions at a sufficient scale across human-dominated landscapes for species' recovery to be achieved. If implemented urgently, these measures in combination have the potential to alter the current population declines of many Numeniini species and provide a template for the conservation of other groups of threatened species.","language":"English","publisher":"Cambridge University Press","doi":"10.1017/S0959270916000678","usgsCitation":"Pearce-Higgins, J.W., Brown, D.J., Douglas, D.J., Alves, J., Bellio, M., Bocher, P., Buchannan, G.M., Clay, R.P., Conklin, J.R., Crockford, N., Dann, P., Elts, J., Friis, C., Fuller, R., Gill, J.A., Gosbell, K., Johnson, J., Marquez-Ferrando, R., Masero, J.A., Melville, D.S., Millington, S., Minton, C., Mundkur, T., Nol, E., Pehlak, H., Piersma, T., Rogers, D.I., Ruthrauff, D.R., Senner, N.R., Nazeer Shah, J., Sheldon, R.D., Soloviev, S.A., Tomkovich, P.S., and Verkuil, Y.I., 2017, A global threats overview for Numeniini populations: synthesising expert knowledge for a group of declining migratory birds.: Bird Conservation International, v. 27, no. 1, p. 6-34, https://doi.org/10.1017/S0959270916000678.","productDescription":"29 p. 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Andrew","contributorId":97405,"corporation":false,"usgs":true,"family":"Dolloff","given":"C.","email":"","middleInitial":"Andrew","affiliations":[],"preferred":false,"id":694022,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hicke, Jeffrey A.","contributorId":87832,"corporation":false,"usgs":true,"family":"Hicke","given":"Jeffrey","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":694023,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Marcot, Bruce G.","contributorId":152612,"corporation":false,"usgs":false,"family":"Marcot","given":"Bruce","email":"","middleInitial":"G.","affiliations":[{"id":18944,"text":"Pacific Northwest Research Station, USDA Forest Service","active":true,"usgs":false}],"preferred":false,"id":694024,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"McCarl, Bruce","contributorId":51645,"corporation":false,"usgs":true,"family":"McCarl","given":"Bruce","affiliations":[],"preferred":false,"id":694025,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"McMahon, Gerard 0000-0001-7675-777X gmcmahon@usgs.gov","orcid":"https://orcid.org/0000-0001-7675-777X","contributorId":191488,"corporation":false,"usgs":true,"family":"McMahon","given":"Gerard","email":"gmcmahon@usgs.gov","affiliations":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true},{"id":565,"text":"Southeast Climate Science Center","active":true,"usgs":true}],"preferred":true,"id":693238,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Morton, John M.","contributorId":17097,"corporation":false,"usgs":true,"family":"Morton","given":"John","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":694026,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70187422,"text":"70187422 - 2017 - Reconnaissance sedimentology of selected tertiary exposures in the upland region bordering the Yukon Flats basin, east-central Alaska","interactions":[],"lastModifiedDate":"2017-05-08T13:48:52","indexId":"70187422","displayToPublicDate":"2017-03-31T00:00:00","publicationYear":"2017","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":2,"text":"State or Local Government Series"},"seriesTitle":{"id":5388,"text":"Preliminary Interpretive Report","active":true,"publicationSubtype":{"id":2}},"seriesNumber":"2016-6","title":"Reconnaissance sedimentology of selected tertiary exposures in the upland region bordering the Yukon Flats basin, east-central Alaska","docAbstract":"<p>This report summarizes reconnaissance sedimentologic and stratigraphic observations made during six days of helicopter-supported fieldwork in 2002 on Tertiary sedimentary rocks exposed in the upland region around the flanks of the Yukon Flats basin in east-central Alaska (fig. 1). This project was a cooperative effort between the Alaska Division of Geological &amp; Geophysical Surveys (DGGS) and the U.S. Geological Survey (USGS) to investigate the geology of the basin in preparation for an assessment of the undiscovered, technically recoverable hydrocarbon resources (Stanley and others, 2004). Field observations and interpretations summarized in this report are reconnaissance level. At most, no more than a few hours were spent on the ground at any location. Measured sections included in this report are sketch sec- tions and thicknesses shown are approximate. Relatively detailed observations were made by the authors at only three locations, including The Mudbank (Hodzana River), Rampart (east bank of the Yukon River), and Bryant Creek (along the Tintina fault near the Canada border). These three locations are described first in relative detail, then followed by general descriptions of other locations.</p>","language":"English","publisher":"Alaska Division of Geological & Geophysical Surveys","doi":"10.14509/29700","usgsCitation":"LePain, D.L., and Stanley, R.G., 2017, Reconnaissance sedimentology of selected tertiary exposures in the upland region bordering the Yukon Flats basin, east-central Alaska: Preliminary Interpretive Report 2016-6, vi, 14 p., https://doi.org/10.14509/29700.","productDescription":"vi, 14 p.","ipdsId":"IP-079523","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":469978,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.14509/29700","text":"Publisher Index Page"},{"id":340755,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Yukon Flats","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -155.06103515624997,\n              66.86108230224609\n            ],\n            [\n              -153.896484375,\n              63.73390885572919\n            ],\n            [\n              -141.08642578125,\n              65.22910188319217\n            ],\n            [\n              -142.93212890625,\n              68.13885164925573\n            ],\n            [\n              -155.06103515624997,\n              66.86108230224609\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","publishingServiceCenter":{"id":14,"text":"Menlo Park PSC"},"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"590aec49e4b0fc4e4492aba5","contributors":{"authors":[{"text":"LePain, David L.","contributorId":191714,"corporation":false,"usgs":false,"family":"LePain","given":"David","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":693953,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stanley, Richard G. 0000-0001-6192-8783 rstanley@usgs.gov","orcid":"https://orcid.org/0000-0001-6192-8783","contributorId":1832,"corporation":false,"usgs":true,"family":"Stanley","given":"Richard","email":"rstanley@usgs.gov","middleInitial":"G.","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":693952,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70189965,"text":"70189965 - 2017 - A synthesis of thermokarst lake water balance in high-latitude regions of North America from isotope tracers","interactions":[],"lastModifiedDate":"2017-07-31T07:38:16","indexId":"70189965","displayToPublicDate":"2017-03-15T00:00:00","publicationYear":"2017","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":5363,"text":"Arctic Science","active":true,"publicationSubtype":{"id":10}},"title":"A synthesis of thermokarst lake water balance in high-latitude regions of North America from isotope tracers","docAbstract":"<p><span>Numerous studies utilizing remote sensing imagery and other methods have documented that thermokarst lakes are undergoing varied hydrological transitions in response to recent climate changes, from surface area expansion to drainage and evaporative desiccation. Here, we provide a synthesis of hydrological conditions for 376 lakes of mainly thermokarst origin across high-latitude North America. We assemble surface water isotope compositions measured during the past decade at five lake-rich landscapes including Arctic Coastal Plain (Alaska), Yukon Flats (Alaska), Old Crow Flats (Yukon), northwestern Hudson Bay Lowlands (Manitoba), and Nunavik (Quebec). These landscapes represent the broad range of thermokarst environments by spanning gradients in meteorological, permafrost, and vegetation conditions. An isotope framework was established based on flux-weighted long-term averages of meteorological conditions for each lake to quantify water balance metrics. The isotope composition of source water and evaporation-to-inflow ratio for each lake were determined, and the results demonstrated a substantial array of regional and subregional diversity of lake hydrological conditions. Controls on lake water balance and how these vary among the five landscapes and with differing environmental drivers are assessed. Findings reveal that lakes in the Hudson Bay Lowlands are most vulnerable to evaporative desiccation, whereas those in Nunavik are most resilient. However, we also identify the complexity in predicting hydrological responses of these thermokarst landscapes to future climate change.</span></p>","language":"English","publisher":"NRC Research Press","doi":"10.1139/AS-2016-0019","usgsCitation":"MacDonald, L.A., Wolfe, B.B., Turner, K.W., Anderson, L., Arp, C.D., Birks, J., Bouchard, F., Edwards, T.W., Farquharson, N., Hall, R.I., McDonald, I., Narancic, B., Ouimet, C., Pienitz, R., Tondu, J., and White, H., 2017, A synthesis of thermokarst lake water balance in high-latitude regions of North America from isotope tracers: Arctic Science, v. 3, no. 2, p. 118-149, https://doi.org/10.1139/AS-2016-0019.","productDescription":"32 p.","startPage":"118","endPage":"149","ipdsId":"IP-076403","costCenters":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"links":[{"id":470008,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1139/as-2016-0019","text":"Publisher Index Page"},{"id":344447,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"3","issue":"2","publishingServiceCenter":{"id":2,"text":"Denver PSC"},"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5980419ae4b0a38ca2789339","contributors":{"authors":[{"text":"MacDonald, Lauren A.","contributorId":195378,"corporation":false,"usgs":false,"family":"MacDonald","given":"Lauren","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":706910,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wolfe, Brent B.","contributorId":172516,"corporation":false,"usgs":false,"family":"Wolfe","given":"Brent","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":706911,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Turner, Kevin W.","contributorId":195380,"corporation":false,"usgs":false,"family":"Turner","given":"Kevin","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":706912,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Anderson, Lesleigh 0000-0002-5264-089X land@usgs.gov","orcid":"https://orcid.org/0000-0002-5264-089X","contributorId":436,"corporation":false,"usgs":true,"family":"Anderson","given":"Lesleigh","email":"land@usgs.gov","affiliations":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"preferred":true,"id":706909,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Arp, Christopher D.","contributorId":17330,"corporation":false,"usgs":false,"family":"Arp","given":"Christopher","email":"","middleInitial":"D.","affiliations":[{"id":6752,"text":"University of Alaska Fairbanks","active":true,"usgs":false}],"preferred":false,"id":706913,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Birks, Jean","contributorId":87856,"corporation":false,"usgs":true,"family":"Birks","given":"Jean","email":"","affiliations":[],"preferred":false,"id":706914,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Bouchard, Frederic","contributorId":194639,"corporation":false,"usgs":false,"family":"Bouchard","given":"Frederic","email":"","affiliations":[],"preferred":false,"id":706915,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Edwards, Thomas W.D. 0000-0002-0773-0909 tce@usgs.gov","orcid":"https://orcid.org/0000-0002-0773-0909","contributorId":195384,"corporation":false,"usgs":false,"family":"Edwards","given":"Thomas","email":"tce@usgs.gov","middleInitial":"W.D.","affiliations":[],"preferred":false,"id":706916,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Farquharson, Nicole","contributorId":195385,"corporation":false,"usgs":false,"family":"Farquharson","given":"Nicole","email":"","affiliations":[],"preferred":false,"id":706917,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Hall, Roland I.","contributorId":168744,"corporation":false,"usgs":false,"family":"Hall","given":"Roland","email":"","middleInitial":"I.","affiliations":[{"id":6655,"text":"University of Waterloo","active":true,"usgs":false}],"preferred":false,"id":706918,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"McDonald, Ian","contributorId":195387,"corporation":false,"usgs":false,"family":"McDonald","given":"Ian","email":"","affiliations":[],"preferred":false,"id":706919,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Narancic, Biljana","contributorId":195388,"corporation":false,"usgs":false,"family":"Narancic","given":"Biljana","email":"","affiliations":[],"preferred":false,"id":706920,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Ouimet, Chantal","contributorId":195389,"corporation":false,"usgs":false,"family":"Ouimet","given":"Chantal","email":"","affiliations":[],"preferred":false,"id":706921,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Pienitz, Reinhard","contributorId":195390,"corporation":false,"usgs":false,"family":"Pienitz","given":"Reinhard","email":"","affiliations":[],"preferred":false,"id":706922,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Tondu, Jana","contributorId":195391,"corporation":false,"usgs":false,"family":"Tondu","given":"Jana","email":"","affiliations":[],"preferred":false,"id":706923,"contributorType":{"id":1,"text":"Authors"},"rank":15},{"text":"White, Hilary","contributorId":195392,"corporation":false,"usgs":false,"family":"White","given":"Hilary","email":"","affiliations":[],"preferred":false,"id":706924,"contributorType":{"id":1,"text":"Authors"},"rank":16}]}}
,{"id":70184973,"text":"70184973 - 2017 - Evaluation of a method using survey counts and tag data to estimate the number of Pacific walruses (<i>Odobenus rosmarus divergens</i>) using a coastal haulout in northwestern Alaska","interactions":[],"lastModifiedDate":"2018-06-16T17:44:45","indexId":"70184973","displayToPublicDate":"2017-03-14T00:00:00","publicationYear":"2017","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3093,"text":"Polar Biology","active":true,"publicationSubtype":{"id":10}},"title":"Evaluation of a method using survey counts and tag data to estimate the number of Pacific walruses (<i>Odobenus rosmarus divergens</i>) using a coastal haulout in northwestern Alaska","docAbstract":"<p><span>Increased periods of sparse sea ice over the continental shelf of the Chukchi Sea in late summer have reduced offshore haulout habitat for Pacific walruses (</span><i class=\"EmphasisTypeItalic \">Odobenus rosmarus divergens</i><span>) and increased opportunities for human activities in the region. Knowing how many walruses could be affected by human activities would be useful to conservation decisions. Currently, there are no adequate estimates of walrus abundance in the northeastern Chukchi Sea during summer–early autumn. Estimating abundance in autumn might be possible from coastal surveys of hauled out walruses during periods when offshore sea ice is unavailable to walruses. We evaluated methods to estimate the size of the walrus population that was using a haulout on the coast of northwestern Alaska in autumn by using aerial photography to count the number of hauled out walruses (herd size) and data from 37 tagged walruses to estimate availability (proportion of population hauled out). We used two methods to estimate availability, direct proportions of hauled out tagged walruses and smoothed proportions using local polynomial regression. Point estimates of herd size (4200–38,000 walruses) and total population size (76,000–287,000 walruses) ranged widely among days and between the two methods of estimating availability. Estimates of population size were influenced most by variation in estimates of availability. Coastal surveys might be improved most by counting walruses when the greatest numbers are hauled out, thereby reducing the influence of availability on population size estimates. The chance of collecting data during peak haulout periods would be improved by conducting multiple surveys.</span></p>","language":"English","publisher":"Springer","doi":"10.1007/s00300-016-2060-5","usgsCitation":"Battaile, B., Jay, C.V., Udevitz, M.S., and Fischbach, A.S., 2017, Evaluation of a method using survey counts and tag data to estimate the number of Pacific walruses (<i>Odobenus rosmarus divergens</i>) using a coastal haulout in northwestern Alaska: Polar Biology, v. 40, no. 7, p. 1359-1369, https://doi.org/10.1007/s00300-016-2060-5.","productDescription":"11 p.","startPage":"1359","endPage":"1369","ipdsId":"IP-070731","costCenters":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"links":[{"id":438417,"rank":0,"type":{"id":30,"text":"Data Release"},"url":"https://doi.org/10.5066/F7B27SB2","text":"USGS data release","linkHelpText":"Walrus Haulout Photographs Near Pt. Lay Alaska, September 2014"},{"id":337549,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"40","issue":"7","publishingServiceCenter":{"id":12,"text":"Tacoma PSC"},"noUsgsAuthors":false,"publicationDate":"2017-01-04","publicationStatus":"PW","scienceBaseUri":"58c90123e4b0849ce97abcb2","contributors":{"authors":[{"text":"Battaile, Brian bbattaile@usgs.gov","contributorId":189069,"corporation":false,"usgs":true,"family":"Battaile","given":"Brian","email":"bbattaile@usgs.gov","affiliations":[],"preferred":true,"id":683780,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jay, Chadwick V. 0000-0002-9559-2189 cjay@usgs.gov","orcid":"https://orcid.org/0000-0002-9559-2189","contributorId":192736,"corporation":false,"usgs":true,"family":"Jay","given":"Chadwick","email":"cjay@usgs.gov","middleInitial":"V.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":684324,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Udevitz, Mark S. 0000-0003-4659-138X mudevitz@usgs.gov","orcid":"https://orcid.org/0000-0003-4659-138X","contributorId":3189,"corporation":false,"usgs":true,"family":"Udevitz","given":"Mark","email":"mudevitz@usgs.gov","middleInitial":"S.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":684325,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Fischbach, Anthony S. 0000-0002-6555-865X afischbach@usgs.gov","orcid":"https://orcid.org/0000-0002-6555-865X","contributorId":2865,"corporation":false,"usgs":true,"family":"Fischbach","given":"Anthony","email":"afischbach@usgs.gov","middleInitial":"S.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":684326,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70185014,"text":"70185014 - 2017 - A science of integration: frameworks, processes, and products in a place-based, integrative study","interactions":[],"lastModifiedDate":"2017-03-29T11:42:20","indexId":"70185014","displayToPublicDate":"2017-03-14T00:00:00","publicationYear":"2017","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":5318,"text":"Sustainability Science","active":true,"publicationSubtype":{"id":10}},"title":"A science of integration: frameworks, processes, and products in a place-based, integrative study","docAbstract":"<p><span>Integrative research is increasingly a priority within the scientific community and is a central goal for the evolving field of sustainability science. While it is conceptually attractive, its successful implementation has been challenging and recent work suggests that the move towards interdisciplinarity and transdisciplinarity in sustainability science is being only partially realized. To address this from the perspective of social-ecological systems (SES) research, we examine the process of conducting a science of integration within the Southcentral Alaska Test Case (SCTC) of Alaska-EPSCoR as a test-bed for this approach. The SCTC is part of a large, 5&nbsp;year, interdisciplinary study investigating changing environments and adaptations to those changes in Alaska. In this paper, we review progress toward a science of integration and present our efforts to confront the practical issues of applying proposed integration frameworks. We: (1) define our integration framework; (2) describe the collaborative processes, including the co-development of science through stakeholder engagement and partnerships; and (3) illustrate potential products of integrative, social-ecological systems research. The approaches we use can also be applied outside of this particular framework. We highlight challenges and propose improvements for integration in sustainability science by addressing the need for common frameworks and improved contextual understanding. These insights may be useful for capacity-building for interdisciplinary projects that address complex real-world social and environmental problems.</span></p>","language":"English","publisher":"Springer","doi":"10.1007/s11625-016-0391-3","usgsCitation":"Kliskey, A., Alessa, L., Wandersee, S., Williams, P., Trammell, J., Powell, J., Grunblatt, J., and Wipfli, M.S., 2017, A science of integration: frameworks, processes, and products in a place-based, integrative study: Sustainability Science, v. 12, no. 2, p. 293-303, https://doi.org/10.1007/s11625-016-0391-3.","productDescription":"11 p.","startPage":"293","endPage":"303","ipdsId":"IP-065205","costCenters":[{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true}],"links":[{"id":337522,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"12","issue":"2","publishingServiceCenter":{"id":12,"text":"Tacoma PSC"},"noUsgsAuthors":false,"publicationDate":"2016-09-03","publicationStatus":"PW","scienceBaseUri":"58c90122e4b0849ce97abcaa","contributors":{"authors":[{"text":"Kliskey, Andrew","contributorId":189256,"corporation":false,"usgs":false,"family":"Kliskey","given":"Andrew","email":"","affiliations":[],"preferred":false,"id":684262,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Alessa, Lilian","contributorId":189257,"corporation":false,"usgs":false,"family":"Alessa","given":"Lilian","email":"","affiliations":[],"preferred":false,"id":684263,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wandersee, Sarah","contributorId":189258,"corporation":false,"usgs":false,"family":"Wandersee","given":"Sarah","email":"","affiliations":[],"preferred":false,"id":684264,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Williams, Paula","contributorId":189259,"corporation":false,"usgs":false,"family":"Williams","given":"Paula","email":"","affiliations":[],"preferred":false,"id":684265,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Trammell, Jamie","contributorId":189260,"corporation":false,"usgs":false,"family":"Trammell","given":"Jamie","email":"","affiliations":[],"preferred":false,"id":684266,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Powell, Jim","contributorId":178178,"corporation":false,"usgs":false,"family":"Powell","given":"Jim","email":"","affiliations":[],"preferred":false,"id":684267,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Grunblatt, Jess","contributorId":189261,"corporation":false,"usgs":false,"family":"Grunblatt","given":"Jess","email":"","affiliations":[],"preferred":false,"id":684268,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Wipfli, Mark S. 0000-0002-4856-6068 mwipfli@usgs.gov","orcid":"https://orcid.org/0000-0002-4856-6068","contributorId":1425,"corporation":false,"usgs":true,"family":"Wipfli","given":"Mark","email":"mwipfli@usgs.gov","middleInitial":"S.","affiliations":[{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true}],"preferred":true,"id":683956,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70207982,"text":"70207982 - 2017 - Harvest dynamics and annual survival of mallards and grey ducks","interactions":[],"lastModifiedDate":"2020-01-22T15:50:21","indexId":"70207982","displayToPublicDate":"2017-03-09T15:41:34","publicationYear":"2017","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":"Harvest dynamics and annual survival of mallards and grey ducks","docAbstract":"<p><span>We examined how hunter behavior, environmental covariates, and mallard (</span><i>Anas platyrhynchos</i><span>) and grey duck (</span><i>A. superciliosa</i><span>) population indices affected per capita harvest, hunter effort (i.e., hours hunted), and hunter participation (i.e., license sales) between 1997 and 2012 in the Eastern Fish and Game Region of New Zealand. Additionally, we examined how total annual hunter effort and harvest affected annual survival and harvest rates (i.e., the proportion of the population that is harvested). Per capita harvest increased with hunter effort and bag limits; hunter effort decreased over time, but effort and participation increased with mallard population size. Juvenile harvest rates were greater than for adults and negatively associated with population size. The relationship between harvest regulations and harvest rates was inconsistent. The 44‐day seasons had greater juvenile harvest rates than the 57‐ and 72‐day seasons. Similarly, years with a 7‐bag limit had higher juvenile harvest rates than years with a 10‐bag limit. Hunter effort affected annual survival rates, especially for females. Alternatively or concordantly, hunter effort may be a surrogate for population size and thus, survival rate may have been density dependent. The relationship between harvest and density‐dependent mortality may in part be augmented by hunter behavior; fewer hunters hunted for fewer hours in years with relatively few birds. Our results suggest bag limits are more effective than season length at managing harvest; reducing bag limits to &lt;2 birds/day from ≥7 could decrease harvest by as much as 50%. Furthermore, regulation consistency, better education, and enforcement of season regulations may improve harvest management; 58% of active hunters reported they shot mallards or grey ducks after the close of the 31‐day season, which accounted for 13% of total harvest.</span></p>","language":"English","publisher":"The Wildlife Society","doi":"10.1002/jwmg.21213","usgsCitation":"McDougall, M.B., and Amundson, C.L., 2017, Harvest dynamics and annual survival of mallards and grey ducks: Journal of Wildlife Management, v. 81, no. 3, p. 449-460, https://doi.org/10.1002/jwmg.21213.","productDescription":"12 p.","startPage":"449","endPage":"460","ipdsId":"IP-064825","costCenters":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"links":[{"id":461699,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1002/jwmg.21213","text":"Publisher Index Page"},{"id":371467,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"New Zealand","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              175.5615234375,\n              -39.419220736559545\n            ],\n            [\n              178.57177734375,\n              -39.419220736559545\n            ],\n            [\n              178.57177734375,\n              -37.5097258429375\n            ],\n            [\n              175.5615234375,\n              -37.5097258429375\n            ],\n            [\n              175.5615234375,\n              -39.419220736559545\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"81","issue":"3","noUsgsAuthors":false,"publicationDate":"2017-03-09","publicationStatus":"PW","contributors":{"authors":[{"text":"McDougall, Matthew B.","contributorId":221709,"corporation":false,"usgs":false,"family":"McDougall","given":"Matthew","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":780031,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Amundson, Courtney L. 0000-0002-0166-7224 camundson@usgs.gov","orcid":"https://orcid.org/0000-0002-0166-7224","contributorId":4833,"corporation":false,"usgs":true,"family":"Amundson","given":"Courtney","email":"camundson@usgs.gov","middleInitial":"L.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":780032,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70175427,"text":"70175427 - 2017 - Mineral potential mapping in an accreted island-arc setting using aeromagnetic data: An example from southwest Alaska","interactions":[],"lastModifiedDate":"2021-04-19T17:06:54.450804","indexId":"70175427","displayToPublicDate":"2017-03-07T00:00:00","publicationYear":"2017","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"Mineral potential mapping in an accreted island-arc setting using aeromagnetic data: An example from southwest Alaska","docAbstract":"<p id=\"p-1\">The distribution of volcanogenic massive sulfide (VMS), porphyry-epithermal, Alaska-type ultramafic-mafic complexes, intrusion-related Au, and granitoid Sn-W ore deposits in southwest Alaska supports current metallogenic models linking the formation of these deposit types to the emplacement of different suites of igneous rocks during the evolution of this convergent plate margin. Regional-scale aeromagnetic data provide a continuous set of observations over the deposits and show contrasting patterns over the igneous rock suites hosting the various deposit types. Combined with surface geologic data and regional metallogenic constraints, aeromagnetic data—filtered to enhance the anomalous magnetic field and map magnetic domains—were used to produce a mineral potential map across this accreted island-arc setting. The reduced-to-pole, upward continuation, and total horizontal gradient transform maps show anomalies that could represent porphyry-epithermal deposits within the intraoceanic- and continental-arc terranes. The tilt derivative transform highlights lineaments within the back arc that may represent zones with potential for VMS deposits. The truncations of tilt derivative lineaments outline a major magnetic domain boundary between the back-arc and craton margin, which is prospective for granitoid Sn-W deposits. Annular tilt derivative highs outline granitoids that could be associated with intrusion-related Au deposits within the craton margin. Shallow, magnetite-rich Alaska-type ultramafic-mafic complexes are mapped by their short-wavelength, high-amplitude anomalies. Successful mineral potential mapping across southwestern Alaska as performed in the present study suggests that filtered aeromagnetic data can be effectively used in mineral exploration in convergent continental margin settings.</p>","language":"English","publisher":"Society of Economic Geologists","doi":"10.2113/econgeo.112.2.375","usgsCitation":"Anderson, E., Monecke, T., Hitzman, M.W., Zhou, W., and Bedrosian, P.A., 2017, Mineral potential mapping in an accreted island-arc setting using aeromagnetic data: An example from southwest Alaska: Economic Geology, v. 112, no. 2, p. 375-396, https://doi.org/10.2113/econgeo.112.2.375.","productDescription":"22 p.","startPage":"375","endPage":"396","ipdsId":"IP-069250","costCenters":[{"id":35995,"text":"Geology, Geophysics, and Geochemistry Science Center","active":true,"usgs":true}],"links":[{"id":327805,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -157.23632812499997,\n              56.992882804633986\n            ],\n            [\n              -132.275390625,\n              56.992882804633986\n            ],\n            [\n              -132.275390625,\n              62.55285695857292\n            ],\n            [\n              -157.23632812499997,\n              62.55285695857292\n            ],\n            [\n              -157.23632812499997,\n              56.992882804633986\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"112","issue":"2","publishingServiceCenter":{"id":2,"text":"Denver PSC"},"noUsgsAuthors":false,"publicationDate":"2017-02-07","publicationStatus":"PW","scienceBaseUri":"57c6b175e4b0f2f0cebe6f32","contributors":{"authors":[{"text":"Anderson, Eric D. 0000-0002-0138-6166 ericanderson@usgs.gov","orcid":"https://orcid.org/0000-0002-0138-6166","contributorId":172766,"corporation":false,"usgs":true,"family":"Anderson","given":"Eric","email":"ericanderson@usgs.gov","middleInitial":"D.","affiliations":[{"id":211,"text":"Crustal Geophysics and Geochemistry Science Center","active":true,"usgs":true}],"preferred":true,"id":645153,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Monecke, Thomas","contributorId":50423,"corporation":false,"usgs":true,"family":"Monecke","given":"Thomas","affiliations":[],"preferred":false,"id":645155,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hitzman, Murray W. 0000-0002-3876-0537 mhitzman@usgs.gov","orcid":"https://orcid.org/0000-0002-3876-0537","contributorId":200913,"corporation":false,"usgs":true,"family":"Hitzman","given":"Murray","email":"mhitzman@usgs.gov","middleInitial":"W.","affiliations":[],"preferred":false,"id":645156,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Zhou, Wendy","contributorId":205989,"corporation":false,"usgs":false,"family":"Zhou","given":"Wendy","email":"","affiliations":[{"id":6606,"text":"Colorado School of Mines","active":true,"usgs":false}],"preferred":false,"id":814483,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Bedrosian, Paul A. 0000-0002-6786-1038 pbedrosian@usgs.gov","orcid":"https://orcid.org/0000-0002-6786-1038","contributorId":839,"corporation":false,"usgs":true,"family":"Bedrosian","given":"Paul","email":"pbedrosian@usgs.gov","middleInitial":"A.","affiliations":[{"id":211,"text":"Crustal Geophysics and Geochemistry Science Center","active":true,"usgs":true},{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":814484,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70181773,"text":"sim2942 - 2017 - Bedrock geologic map of the northern Alaska Peninsula area, southwestern Alaska","interactions":[],"lastModifiedDate":"2017-06-07T16:27:47","indexId":"sim2942","displayToPublicDate":"2017-03-03T00:00:00","publicationYear":"2017","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":333,"text":"Scientific Investigations Map","code":"SIM","onlineIssn":"2329-132X","printIssn":"2329-1311","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2942","title":"Bedrock geologic map of the northern Alaska Peninsula area, southwestern Alaska","docAbstract":"<div class=\"gmail_default\">The northern Alaska Peninsula is a region of transition<span>&nbsp;</span>from the classic magmatic arc geology of the Alaska Peninsula to a Proterozoic and early Paleozoic carbonate platform and then to the poorly understood, tectonically complex sedimentary basins of southwestern Alaska. Physiographically, the region ranges from the high glaciated mountains of the Alaska-Aleutian Range to the coastal lowlands of Cook Inlet on the east and Bristol Bay on the southwest. The lower Ahklun Mountains and finger lakes on the west side of the map area show strong effects from glaciation. Structurally, a number of major faults cut the map area. Most important of these are the Bruin Bay Fault that parallels the coast of Cook Inlet, the Lake Clark Fault that cuts diagonally northeast to southwest across the eastern part of the map area, and the presently active Holitna Fault to the northwest that cuts surficial deposits.</div><div class=\"gmail_default\"><p class=\"m_6432475782943297020m_-1653403294888719891gmail-p1\">Distinctive rock packages assigned to three provinces are overlain by younger sedimentary rocks and intruded by widely dispersed latest Cretaceous and (or) early Tertiary granitic rocks. Much of the east half of the map area lies in the Alaska-Aleutian Range province; the Jurassic to Tertiary Alaska-Aleutian Range batholith and derivative Jurassic sedimentary rocks form the core of this province, which is intruded and overlain by the Aleutian magmatic arc. The Lime Hills province, the carbonate platform, occurs in the north-central part of the map area. The Paleozoic and Mesozoic Ahklun Mountains province in the western part of the map area includes abundant chert, argillite, and graywacke and lesser limestone, basalt, and tectonic mélange. The Kuskokwim Group, an Upper Cretaceous turbidite sequence, is extensively exposed and bounds all three provinces in the west-central part of the map area.</p></div>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/sim2942","usgsCitation":"Wilson, F.H., Blodgett, R.B., Blome, C.D., Mohadjer, S., Preller, C.C., Klimasauskas, E.P., Gamble, B.M., and Coonrad, W.L., 2017, Bedrock geologic map of the northern Alaska Peninsula area, southwestern Alaska: U.S. Geological Survey Scientific Investigations Map 2942, pamphlet 43 p., scale 1:350,000, https://doi.org/10.3133/sim2942.","productDescription":"Pamphlet: iv, 43 p.; 2 Sheets: 51.93 x 33.52 inches and 35.62 x 28.33 inches; Database; Metadata; ReadMe","onlineOnly":"Y","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":335286,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/sim/2942/sim2942_pamphlet.pdf","text":"Pamphlet","size":"540 KB","linkFileType":{"id":1,"text":"pdf"},"description":"SIM 2942 Pamphlet"},{"id":335287,"rank":3,"type":{"id":26,"text":"Sheet"},"url":"https://pubs.usgs.gov/sim/2942/sim2942_sheet1.pdf","text":"Sheet 1","size":"33.6 MB","linkFileType":{"id":1,"text":"pdf"},"description":"SIM 2942 Sheet 1"},{"id":335285,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/sim/2942/coverthb.jpg"},{"id":335291,"rank":7,"type":{"id":16,"text":"Metadata"},"url":"https://pubs.usgs.gov/sim/2942/sim2942_metadata.txt","text":"Metadata","size":"63 KB","linkFileType":{"id":2,"text":"txt"},"description":"SIM 2942 Metadata TXT"},{"id":335292,"rank":8,"type":{"id":16,"text":"Metadata"},"url":"https://pubs.usgs.gov/sim/2942/sim2942_metadata.xml","text":"Metadata","size":"58 KB xml","description":"SIM 2942 Metadata XML"},{"id":335293,"rank":9,"type":{"id":16,"text":"Metadata"},"url":"https://pubs.usgs.gov/sim/2942/sim2942_metadata_faq.html","text":"Metadata FAQ","size":"46 MB","linkFileType":{"id":5,"text":"html"},"description":"SIM 2942 Metadata FAQ"},{"id":335288,"rank":4,"type":{"id":26,"text":"Sheet"},"url":"https://pubs.usgs.gov/sim/2942/sim2942_sheet2.pdf","text":"Sheet 2","size":"3.7 MB","linkFileType":{"id":1,"text":"pdf"},"description":"SIM 2942 Sheet 2"},{"id":335289,"rank":5,"type":{"id":9,"text":"Database"},"url":"https://pubs.usgs.gov/sim/2942/sim2942_databases.zip","text":"Database","size":"196.4 MB","linkFileType":{"id":6,"text":"zip"},"description":"SIM 2942 Database"},{"id":335290,"rank":6,"type":{"id":16,"text":"Metadata"},"url":"https://pubs.usgs.gov/sim/2942/sim2942_metadata.html","text":"Metadata","size":"147 KB","linkFileType":{"id":5,"text":"html"},"description":"SIM 2942 Metadata HTML"},{"id":335294,"rank":10,"type":{"id":20,"text":"Read Me"},"url":"https://pubs.usgs.gov/sim/2942/sim2942_readme.pdf","text":"ReadMe","size":"490 KB","linkFileType":{"id":1,"text":"pdf"},"description":"SIM 2942 ReadMe"}],"country":"United States","state":"Alaska","otherGeospatial":"Northern Alaska Peninsula Area","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -159,\n              61\n            ],\n            [\n              -159,\n              59\n            ],\n            [\n              -153,\n              59\n            ],\n            [\n              -151.666666,\n              61\n            ],\n            [\n              -159,\n              61\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","contact":"<p><a href=\"http://alaska.usgs.gov/staff\" target=\"blank\" data-mce-href=\"http://alaska.usgs.gov/staff\">Staff</a>, Alaska Science Center<br>
U.S. Geological Survey<br>
4210 University Dr.<br>
Anchorage, AK 99508<br><a href=\"http://alaska.usgs.gov/\" target=\"blank\" data-mce-href=\"http://alaska.usgs.gov/\">Alaska Science Center</a></p>","tableOfContents":"<ul><li>Abstract<br></li><li>Introduction and Previous Work<br></li><li>Geographic, Geologic, and Physiographic Framework<br></li><li>Geologic Discussion<br></li><li>Digital Data<br></li><li>Acknowledgments<br></li><li>Description of Map Units<br></li><li>References Cited<br></li></ul>","publishedDate":"2017-03-03","noUsgsAuthors":false,"publicationDate":"2017-03-03","publicationStatus":"PW","scienceBaseUri":"58ba8ebce4b0bcef64f0b937","contributors":{"compilers":[{"text":"Wilson, Frederic H. 0000-0003-1761-6437 fwilson@usgs.gov","orcid":"https://orcid.org/0000-0003-1761-6437","contributorId":67174,"corporation":false,"usgs":true,"family":"Wilson","given":"Frederic","email":"fwilson@usgs.gov","middleInitial":"H.","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":668457,"contributorType":{"id":3,"text":"Compilers"},"rank":1},{"text":"Blodgett, Robert B.","contributorId":89612,"corporation":false,"usgs":true,"family":"Blodgett","given":"Robert B.","affiliations":[],"preferred":false,"id":668458,"contributorType":{"id":3,"text":"Compilers"},"rank":2},{"text":"Blome, Charles D. 0000-0002-3449-9378 cblome@usgs.gov","orcid":"https://orcid.org/0000-0002-3449-9378","contributorId":1246,"corporation":false,"usgs":true,"family":"Blome","given":"Charles","email":"cblome@usgs.gov","middleInitial":"D.","affiliations":[{"id":164,"text":"Central Energy Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":668459,"contributorType":{"id":3,"text":"Compilers"},"rank":3},{"text":"Mohadjer, Solmaz","contributorId":61518,"corporation":false,"usgs":true,"family":"Mohadjer","given":"Solmaz","email":"","affiliations":[],"preferred":false,"id":668460,"contributorType":{"id":3,"text":"Compilers"},"rank":4},{"text":"Preller, Cindi C.","contributorId":55898,"corporation":false,"usgs":true,"family":"Preller","given":"Cindi","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":668461,"contributorType":{"id":3,"text":"Compilers"},"rank":5},{"text":"Klimasauskas, Edward P.","contributorId":80366,"corporation":false,"usgs":true,"family":"Klimasauskas","given":"Edward","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":668462,"contributorType":{"id":3,"text":"Compilers"},"rank":6},{"text":"Gamble, Bruce M. bgamble@usgs.gov","contributorId":560,"corporation":false,"usgs":true,"family":"Gamble","given":"Bruce","email":"bgamble@usgs.gov","middleInitial":"M.","affiliations":[],"preferred":true,"id":668463,"contributorType":{"id":3,"text":"Compilers"},"rank":7},{"text":"Coonrad, Warren L.","contributorId":47481,"corporation":false,"usgs":true,"family":"Coonrad","given":"Warren","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":668464,"contributorType":{"id":3,"text":"Compilers"},"rank":8}]}}
,{"id":70184189,"text":"fs20173012 - 2017 - Geospatial analysis identifies critical mineral-resource potential in Alaska","interactions":[],"lastModifiedDate":"2018-06-19T19:29:48","indexId":"fs20173012","displayToPublicDate":"2017-03-03T00:00:00","publicationYear":"2017","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":313,"text":"Fact Sheet","code":"FS","onlineIssn":"2327-6932","printIssn":"2327-6916","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2017-3012","title":"Geospatial analysis identifies critical mineral-resource potential in Alaska","docAbstract":"<p><span>Alaska consists of more than&nbsp;</span><span>663,000 square miles (1,717,000 square&nbsp;</span><span>kilometers) of land—more than a sixth of&nbsp;</span><span>the total area of the United States—and&nbsp;</span><span>large tracts of it have not been system</span><span>atically studied or sampled for mineral-</span><span>resource potential. Many regions of&nbsp;</span><span>the State are known to have significant&nbsp;</span><span>mineral-resource potential, and there&nbsp;</span><span>are currently six operating mines in the&nbsp;</span><span>State along with numerous active mineral&nbsp;</span><span>exploration projects. The U.S. Geologi</span><span>cal Survey and the Alaska&nbsp;</span><span>Division of Geological &amp; Geophysical&nbsp;</span><span>Surveys have developed a&nbsp;</span><span>new geospatial tool that integrates and&nbsp;</span><span>analyzes publicly available databases&nbsp;</span><span>of geologic information and estimates&nbsp;</span><span>the mineral-resource potential for criti</span><span>cal minerals, which was recently used&nbsp;</span><span>to evaluate Alaska. The results of the&nbsp;</span><span>analyses highlight areas that have known&nbsp;</span><span>mineral deposits and also reveal areas&nbsp;</span><span>that were not previously considered to&nbsp;</span><span>be prospective for these deposit types.&nbsp;</span><span>These results will inform land manage</span><span>ment decisions by Federal, State, and&nbsp;</span><span>private landholders, and will also help&nbsp;</span><span>guide future exploration activities and&nbsp;</span><span>scientific investigations in Alaska.</span></p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/fs20173012","usgsCitation":"Karl, S.M., and Labay, K.A., Geospatial analysis identifies critical mineral-resource potential in Alaska: U.S. Geological Survey Fact Sheet 2017–3012, 4 p., https://doi.org/10.3133/fs20173012.","productDescription":"4 p.","ipdsId":"IP-082372","costCenters":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"links":[{"id":336820,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/fs/2017/3012/fs20173012.pdf","text":"Report","size":"6.8 MB","linkFileType":{"id":1,"text":"pdf"},"description":"FS 2017-3012"},{"id":336819,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/fs/2017/3012/coverthb.jpg"}],"country":"United 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\":{\"name\":\"Alaska\",\"nation\":\"USA  \"}}]}","contact":"<p><a title=\"Alaska Science Center Staff\" href=\"http://alaska.usgs.gov/staff/\" target=\"_blank\" data-mce-href=\"http://alaska.usgs.gov/staff/\">Alaska Science Center staff&nbsp;</a><br>U.S. Geological Survey<br>4210 University Dr.<br>Anchorage, AK 99508<br><a title=\"Alaska Mineral Resources\" href=\" https://minerals.usgs.gov/science/alaska-studies.html\" target=\"_blank\" data-mce-href=\"https://minerals.usgs.gov/science/alaska-studies.html\">Alaska Mineral Resources</a><br><a title=\"Alaska Science Center\" href=\"http://alaska.usgs.gov/\" target=\"_blank\" data-mce-href=\"http://alaska.usgs.gov/\">Alaska Science Center</a></p>","tableOfContents":"<ul><li>What are Critical Minerals?<br></li><li>Examples of Uses of Critical Minerals<br></li><li>How is Mineral-Resource Potential Evaluated by this Method?<br></li><li>What is the Critical Mineral-Resource Potential of Alaska?<br></li><li>The Road Ahead<br></li><li>Read the Full Report<br></li></ul>","publishingServiceCenter":{"id":14,"text":"Menlo Park PSC"},"publishedDate":"2017-03-03","noUsgsAuthors":false,"publicationDate":"2017-03-03","publicationStatus":"PW","scienceBaseUri":"58ba8ebce4b0bcef64f0b935","contributors":{"editors":[{"text":"Jacques, Katherine","contributorId":187482,"corporation":false,"usgs":true,"family":"Jacques","given":"Katherine","email":"","affiliations":[],"preferred":false,"id":680591,"contributorType":{"id":2,"text":"Editors"},"rank":1},{"text":"Landowski, Claire","contributorId":187483,"corporation":false,"usgs":true,"family":"Landowski","given":"Claire","affiliations":[],"preferred":false,"id":680592,"contributorType":{"id":2,"text":"Editors"},"rank":2}],"authors":[{"text":"Karl, Susan M. 0000-0003-1559-7826 skarl@usgs.gov","orcid":"https://orcid.org/0000-0003-1559-7826","contributorId":502,"corporation":false,"usgs":true,"family":"Karl","given":"Susan","email":"skarl@usgs.gov","middleInitial":"M.","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"preferred":true,"id":680461,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Labay, Keith A. 0000-0002-6763-3190 klabay@usgs.gov","orcid":"https://orcid.org/0000-0002-6763-3190","contributorId":2097,"corporation":false,"usgs":true,"family":"Labay","given":"Keith A.","email":"klabay@usgs.gov","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"preferred":false,"id":680590,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70178815,"text":"pp1814D - 2017 - Regional patterns of Mesozoic-Cenozoic magmatism in western Alaska revealed by new U-Pb and 40Ar/39Ar ages","interactions":[{"subject":{"id":70178815,"text":"pp1814D - 2017 - Regional patterns of Mesozoic-Cenozoic magmatism in western Alaska revealed by new U-Pb and 40Ar/39Ar ages","indexId":"pp1814D","publicationYear":"2017","noYear":false,"chapter":"D","displayTitle":"Regional patterns of Mesozoic-Cenozoic Magmatism in Western Alaska Revealed by New U-Pb and <sup>40</sup>Ar/<sup>39</sup>Ar Ages","title":"Regional patterns of Mesozoic-Cenozoic magmatism in western Alaska revealed by new U-Pb and 40Ar/39Ar ages"},"predicate":"IS_PART_OF","object":{"id":70158938,"text":"pp1814 - 2015 - Studies by the U.S. Geological Survey in Alaska, Volume 15","indexId":"pp1814","publicationYear":"2015","noYear":false,"title":"Studies by the U.S. Geological Survey in Alaska, Volume 15"},"id":1}],"isPartOf":{"id":70158938,"text":"pp1814 - 2015 - Studies by the U.S. Geological Survey in Alaska, Volume 15","indexId":"pp1814","publicationYear":"2015","noYear":false,"title":"Studies by the U.S. Geological Survey in Alaska, Volume 15"},"lastModifiedDate":"2018-12-10T15:19:03","indexId":"pp1814D","displayToPublicDate":"2017-03-02T00:00:00","publicationYear":"2017","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":331,"text":"Professional Paper","code":"PP","onlineIssn":"2330-7102","printIssn":"1044-9612","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"1814","chapter":"D","displayTitle":"Regional patterns of Mesozoic-Cenozoic Magmatism in Western Alaska Revealed by New U-Pb and <sup>40</sup>Ar/<sup>39</sup>Ar Ages","title":"Regional patterns of Mesozoic-Cenozoic magmatism in western Alaska revealed by new U-Pb and 40Ar/39Ar ages","docAbstract":"<p class=\"m_5650407127570482135m_4180947470495460418m_4288564930249366211gmail-m_8357436717544655233m_-4324046578871079521gmail-p1\">In support of regional geologic framework studies, we obtained 50 new argon-40/argon-39 (<sup><span class=\"m_5650407127570482135m_4180947470495460418m_4288564930249366211gmail-m_8357436717544655233m_-4324046578871079521gmail-s1\">40</span></sup>Ar/<sup><span class=\"m_5650407127570482135m_4180947470495460418m_4288564930249366211gmail-m_8357436717544655233m_-4324046578871079521gmail-s1\">39</span></sup>Ar) ages and 33 new uranium-lead (U-Pb) ages from igneous rocks of southwestern Alaska. Most of the samples are from the Sleetmute and Taylor Mountains quadrangles; smaller collections or individual samples are from the Bethel, Candle, Dillingham, Goodnews Bay, Holy Cross, Iditarod, Kantishna River, Lake Clark, Lime Hills, McGrath, Medfra, Talkeetna, and Tanana quadrangles.</p><p class=\"m_5650407127570482135m_4180947470495460418m_4288564930249366211gmail-m_8357436717544655233m_-4324046578871079521gmail-p1\">A U-Pb zircon age of 317.7±0.6 million years (Ma) reveals the presence of Pennsylvanian intermediate igneous (probably volcanic) rocks in the Tikchik terrane, Bethel quadrangle. A U-Pb zircon age of 229.5±0.2 Ma from gabbro intruding the Rampart Group of the Angayucham-Tozitna terrane, Tanana quadrangle, confirms and tightens a previously cited Triassic age for this intrusive suite. A fresh mafic dike in Goodnews Bay quadrangle yielded a&nbsp;<sup><span class=\"m_5650407127570482135m_4180947470495460418m_4288564930249366211gmail-m_8357436717544655233m_-4324046578871079521gmail-s1\">40</span></sup>Ar/<sup><span class=\"m_5650407127570482135m_4180947470495460418m_4288564930249366211gmail-m_8357436717544655233m_-4324046578871079521gmail-s1\">39</span></sup>Ar whole rock age of 155.0±1.9 Ma; this establishes a Jurassic or older age for the previously unconstrained (Paleozoic? to Mesozoic?) sandstone unit that it intrudes. A thick felsic tuff in the Gemuk Group in Taylor Mountains quadrangle yielded a U-Pb zircon age of 153.0±2.0 Ma, extending the age of magmatism in this part of the Togiak terrane back into the Late Jurassic. We report three new U-Pb zircon ages between 120 and 110 Ma—112.0±0.9 Ma from syenite in the Candle quadrangle, 114.9±0.3 Ma from orthogneiss assigned to the Ruby terrane in Iditarod quadrangle, and 116.6±0.1 Ma from a gabbro of the Dishna River mafic-ultramafic complex in Iditarod quadrangle. The latter result requires a substantial age revision, from Triassic to Cretaceous, for at least some rocks that have been mapped as the Dishna River mafic-ultramafic complex. A tuff in the Upper Cretaceous Kuskokwim Group yielded a U-Pb zircon (sensitive high-resolution ion microprobe, SHRIMP) age of 88.3±1.0 Ma; we speculate that the eruptive source was an arc along the trend of the Pebble porphyry copper deposit along the Gulf of Alaska continental margin. More than half of the new ages fall between 75 and 65 Ma, confirming the existence, based on conventional potassium-argon (K-Ar) ages, of a 70-Ma igneous flare-up across southwestern Alaska. Our new ages hint that during this pulse, the locus of magmatism shifted toward the Gulf of Alaska, that is, toward a more outboard position. This shift is consistent with the hypothesis that magmatism was the product of rollback of a subducted slab, which at that time would have been the Resurrection Plate. Intrusive rocks in the Taylor Mountains and Sleetmute quadrangles in the age range of 63 to 59 Ma were emplaced shortly before the onset of ridge subduction as dated by near-trench plutons in the adjacent part of the Chugach accretionary complex. Southwestern Alaska at this time would have been positioned above a very young subducted slab belonging to the Resurrection Plate; magmas, in this scenario, were generated near the edge of the slab window related to ridge subduction. A 56.3±0.2 Ma granite in Taylor Mountains quadrangle and a 54.7±0.7 Ma ashfall tuff in McGrath quadrangle were likely emplaced above the Resurrection-Kula slab window, which by this time is inferred to have entered the region. Another ashfall tuff in McGrath quadrangle, at 42.8±0.5 Ma, likely belongs to the Meshik Arc, the product of renewed subduction after inferred passage of the slab window. A 49.0±0.3-Ma rhyolite in Taylor Mountains quadrangle is about the age of the transition from slab window to renewed subduction. Two plutons in the western Alaska Range, at 31.8±0.4 and 30.9±0.6 Ma, belong to a suite of gabbro to peralkaline granite of unknown origin. Finally, a 4.6±0.1-Ma basalt from a flow in Taylor Mountains quadrangle belongs to the Neogene basaltic province of western Alaska. These rocks were erupted in a distal retroarc setting; the cause of magmatism is unknown.&nbsp;</p>","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Studies by the U.S. Geological Survey in Alaska, vol. 15 (Professional Paper 1814)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/pp1814D","usgsCitation":"Bradley, D.C., Miller, M.L., Friedman, R.M., Layer, P.W., Bleick, H.A., Jones, J.V., III, Box, S.E., Karl, S.M., Shew, N.B., White, T.S., Till, A.B., Dumoulin, J.A., Bundtzen, T.K., O’Sullivan, P.B., and Ullrich, T.D., 2017, Regional patterns of Mesozoic-Cenozoic magmatism in western Alaska revealed by new U-Pb and <sup>40</sup>Ar/<sup>39</sup>Ar ages, <i>in</i> Dumoulin, J.A., ed., Studies by the U.S. Geological Survey in Alaska, vol. 15: U.S. Geological Survey Professional Paper 1814–D, 48 p., https://doi.org/10.3133/pp1814D.","productDescription":"Report: v, 48 p.","numberOfPages":"58","onlineOnly":"Y","ipdsId":"IP-070875","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true},{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":336764,"rank":4,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/pp/1814/d/pp1814d.pdf","text":"Report","size":"34.1 MB","linkFileType":{"id":1,"text":"pdf"},"description":"PP 1814"},{"id":336762,"rank":3,"type":{"id":3,"text":"Appendix"},"url":"https://pubs.usgs.gov/pp/1814/d/pp1814d_apenndix2.zip","text":"Appendix 2 (CSV)","size":"53 KB","linkFileType":{"id":6,"text":"zip"},"description":"PP 1814 Appendix 2 ZIP","linkHelpText":"New Geochronology Data for Igneous-Rock Samples from Western Alaska"},{"id":336760,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/pp/1814/d/coverthb.jpg"},{"id":336761,"rank":2,"type":{"id":3,"text":"Appendix"},"url":"https://pubs.usgs.gov/pp/1814/d/pp1814d_appendix2.xlsx","text":"Appendix 2 (xlsx)","size":"312 KB","linkFileType":{"id":3,"text":"xlsx"},"description":"PP 1814 Appendix 2 XLSX","linkHelpText":"New Geochronology Data for Igneous-Rock Samples from Western Alaska"}],"country":"United States","state":"Alaska","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -162,\n              66\n            ],\n            [\n              -150,\n              66\n            ],\n            [\n              -150,\n              59\n            ],\n            [\n              -162,\n              59\n            ],\n            [\n              -162,\n              66\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","contact":"<p><a href=\"https://alaska.usgs.gov/staff/\" target=\"_blank\" data-mce-href=\"https://alaska.usgs.gov/staff/\">Alaska Science Center staff</a><br> U.S. Geological Survey<br> 4210 University Dr.<br> Anchorage, AK 99508<br> <a href=\"https://minerals.usgs.gov/alaska/\" target=\"_blank\" data-mce-href=\"https://minerals.usgs.gov/alaska/\">Alaska Mineral Resources</a><br> <a href=\"https://alaska.usgs.gov/\" target=\"_blank\" data-mce-href=\"https://alaska.usgs.gov/\">Alaska Science Center&nbsp;</a></p>","tableOfContents":"<ul><li>Abstract<br></li><li>Introduction<br></li><li>Geochronology<br></li><li>Implications for the Magmatic History of Western Alaska Acknowledgments<br></li><li>References Cited<br></li><li>Appendix 1.—Analytical Methods<br></li><li>Appendix 2.—New Geochronology Data for Igneous-Rock Samples from Western Alaska<br></li></ul>","publishingServiceCenter":{"id":14,"text":"Menlo Park PSC"},"publishedDate":"2017-03-02","noUsgsAuthors":false,"publicationDate":"2017-03-02","publicationStatus":"PW","scienceBaseUri":"58b93d28e4b090ec658d771d","contributors":{"editors":[{"text":"Dumoulin, Julie A. 0000-0003-1754-1287 dumoulin@usgs.gov","orcid":"https://orcid.org/0000-0003-1754-1287","contributorId":203209,"corporation":false,"usgs":true,"family":"Dumoulin","given":"Julie","email":"dumoulin@usgs.gov","middleInitial":"A.","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":753566,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Bradley, Dwight 0000-0001-9116-5289 bradleyorchard2@gmail.com","orcid":"https://orcid.org/0000-0001-9116-5289","contributorId":2358,"corporation":false,"usgs":true,"family":"Bradley","given":"Dwight","email":"bradleyorchard2@gmail.com","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":680437,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Miller, Marti L. 0000-0003-0285-4942 mlmiller@usgs.gov","orcid":"https://orcid.org/0000-0003-0285-4942","contributorId":561,"corporation":false,"usgs":true,"family":"Miller","given":"Marti","email":"mlmiller@usgs.gov","middleInitial":"L.","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"preferred":true,"id":680438,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Friedman, Richard M.","contributorId":141227,"corporation":false,"usgs":false,"family":"Friedman","given":"Richard","email":"","middleInitial":"M.","affiliations":[{"id":13720,"text":"Department of Earth and Ocean Sciences University of British Columbia","active":true,"usgs":false}],"preferred":false,"id":680439,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Layer, Paul W.","contributorId":59483,"corporation":false,"usgs":true,"family":"Layer","given":"Paul","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":680440,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Bleick, Heather A. hbleick@usgs.gov","contributorId":2484,"corporation":false,"usgs":true,"family":"Bleick","given":"Heather","email":"hbleick@usgs.gov","middleInitial":"A.","affiliations":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true},{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":680441,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Jones, James V. III 0000-0002-6602-5935 jvjones@usgs.gov","orcid":"https://orcid.org/0000-0002-6602-5935","contributorId":201245,"corporation":false,"usgs":true,"family":"Jones","given":"James","suffix":"III","email":"jvjones@usgs.gov","middleInitial":"V.","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"preferred":true,"id":680442,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Box, Steven E.","contributorId":187446,"corporation":false,"usgs":true,"family":"Box","given":"Steven","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":680443,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Karl, Susan M. 0000-0003-1559-7826 skarl@usgs.gov","orcid":"https://orcid.org/0000-0003-1559-7826","contributorId":502,"corporation":false,"usgs":true,"family":"Karl","given":"Susan","email":"skarl@usgs.gov","middleInitial":"M.","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"preferred":true,"id":680444,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Shew, Nora B. 0000-0003-0025-7220 nshew@usgs.gov","orcid":"https://orcid.org/0000-0003-0025-7220","contributorId":3382,"corporation":false,"usgs":true,"family":"Shew","given":"Nora","email":"nshew@usgs.gov","middleInitial":"B.","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"preferred":true,"id":680445,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"White, Timothy S.","contributorId":187447,"corporation":false,"usgs":true,"family":"White","given":"Timothy","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":680446,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Till, Alison B. atill@usgs.gov","contributorId":2482,"corporation":false,"usgs":true,"family":"Till","given":"Alison","email":"atill@usgs.gov","middleInitial":"B.","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true}],"preferred":true,"id":680447,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Dumoulin, Julie A. 0000-0003-1754-1287 dumoulin@usgs.gov","orcid":"https://orcid.org/0000-0003-1754-1287","contributorId":203209,"corporation":false,"usgs":true,"family":"Dumoulin","given":"Julie","email":"dumoulin@usgs.gov","middleInitial":"A.","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":680448,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Bundtzen, Thomas K.","contributorId":83560,"corporation":false,"usgs":true,"family":"Bundtzen","given":"Thomas K.","affiliations":[],"preferred":false,"id":680449,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"O'Sullivan, Paul B.","contributorId":36627,"corporation":false,"usgs":true,"family":"O'Sullivan","given":"Paul B.","affiliations":[],"preferred":false,"id":680450,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Ullrich, Thomas D.","contributorId":187448,"corporation":false,"usgs":true,"family":"Ullrich","given":"Thomas","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":680451,"contributorType":{"id":1,"text":"Authors"},"rank":15}]}}
,{"id":70198630,"text":"70198630 - 2017 - Walrus haul-out and in water activity levels relative to sea ice availability in the Chukchi Sea","interactions":[],"lastModifiedDate":"2019-06-11T11:43:29","indexId":"70198630","displayToPublicDate":"2017-03-01T13:27:06","publicationYear":"2017","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2373,"text":"Journal of Mammalogy","onlineIssn":"1545-1542","printIssn":"0022-2372","active":true,"publicationSubtype":{"id":10}},"title":"Walrus haul-out and in water activity levels relative to sea ice availability in the Chukchi Sea","docAbstract":"<p><span>An animal’s energetic costs are dependent on the amount of time it allocates to various behavioral activities. For Arctic pinnipeds, the time allocated to active and resting behaviors could change with future reductions in sea ice cover and longer periods of open water. The Pacific walrus (</span><i>Odobenus rosmarus divergens</i><span>) is a large Arctic pinniped that rests on sea ice or land between foraging trips to feed on the seafloor. We used behavioral data collected from radiotagged walruses in the Chukchi Sea (2008–2014) in a Bayesian generalized linear mixed effects model to estimate the probability a walrus was in water foraging, in water not foraging, or hauled out, as a function of environmental covariates. The probability of a walrus being in water increased with wind speed and decreased with air temperature, and the probability a walrus was foraging, given it was in water, increased with available benthic macrofaunal biomass. The probability of each behavior was also related to the nature and availability of haul-out substrates. The amount of time walruses spent in water foraging and hauled out was greatest when only sea ice was available, which typically occurs when walruses occupy feeding areas during summer and early autumn. This situation may be most energy efficient for walruses because it allows the highest proportion of in water energy expenditure to be allocated to foraging. Conversely, the amount of time walruses spent in water foraging and hauled out was lowest when only land was available, which typically occurs in late autumn, in years when walruses were constrained to land haul-outs because sea ice was absent over the continental shelf.</span></p>","language":"English","publisher":"Oxford","doi":"10.1093/jmammal/gyw195","usgsCitation":"Jay, C.V., Taylor, R.L., Fischbach, A., Udevitz, M.S., and Beatty, W.S., 2017, Walrus haul-out and in water activity levels relative to sea ice availability in the Chukchi Sea: Journal of Mammalogy, v. 98, no. 2, p. 386-396, https://doi.org/10.1093/jmammal/gyw195.","productDescription":"11 p.","startPage":"386","endPage":"396","ipdsId":"IP-076658","costCenters":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"links":[{"id":470029,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1093/jmammal/gyw195","text":"Publisher Index Page"},{"id":438428,"rank":0,"type":{"id":30,"text":"Data Release"},"url":"https://doi.org/10.5066/F7XD0ZTG","text":"USGS data release","linkHelpText":"Walrus Haulout and In-water Activity Levels Relative to Sea Ice Availability in the Chukchi Sea: 2008-2014"},{"id":356409,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"Chukchi Sea","volume":"98","issue":"2","noUsgsAuthors":false,"publicationDate":"2017-02-08","publicationStatus":"PW","scienceBaseUri":"5b98a47ee4b0702d0e843086","contributors":{"authors":[{"text":"Jay, Chadwick V. 0000-0002-9559-2189 cjay@usgs.gov","orcid":"https://orcid.org/0000-0002-9559-2189","contributorId":192736,"corporation":false,"usgs":true,"family":"Jay","given":"Chadwick","email":"cjay@usgs.gov","middleInitial":"V.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":742291,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Taylor, Rebecca L. 0000-0001-8459-7614 rebeccataylor@usgs.gov","orcid":"https://orcid.org/0000-0001-8459-7614","contributorId":5112,"corporation":false,"usgs":true,"family":"Taylor","given":"Rebecca","email":"rebeccataylor@usgs.gov","middleInitial":"L.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":742292,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Fischbach, Anthony S. 0000-0002-6555-865X afischbach@usgs.gov","orcid":"https://orcid.org/0000-0002-6555-865X","contributorId":200780,"corporation":false,"usgs":true,"family":"Fischbach","given":"Anthony S.","email":"afischbach@usgs.gov","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":742293,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Udevitz, Mark S. 0000-0003-4659-138X mudevitz@usgs.gov","orcid":"https://orcid.org/0000-0003-4659-138X","contributorId":3189,"corporation":false,"usgs":true,"family":"Udevitz","given":"Mark","email":"mudevitz@usgs.gov","middleInitial":"S.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":742294,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Beatty, William S. 0000-0003-0013-3113 wbeatty@usgs.gov","orcid":"https://orcid.org/0000-0003-0013-3113","contributorId":173946,"corporation":false,"usgs":true,"family":"Beatty","given":"William","email":"wbeatty@usgs.gov","middleInitial":"S.","affiliations":[{"id":606,"text":"Upper Midwest Environmental Sciences Center","active":true,"usgs":true}],"preferred":true,"id":742295,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70186330,"text":"70186330 - 2017 - Surface geophysical methods for characterising frozen ground in transitional permafrost landscapes","interactions":[],"lastModifiedDate":"2018-01-13T15:10:14","indexId":"70186330","displayToPublicDate":"2017-03-01T00:00:00","publicationYear":"2017","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3032,"text":"Permafrost and Periglacial Processes","active":true,"publicationSubtype":{"id":10}},"title":"Surface geophysical methods for characterising frozen ground in transitional permafrost landscapes","docAbstract":"<p><span>The distribution of shallow frozen ground is paramount to research in cold regions, and is subject to temporal and spatial changes influenced by climate, landscape disturbance and ecosystem succession. Remote sensing from airborne and satellite platforms is increasing our understanding of landscape-scale permafrost distribution, but typically lacks the resolution to characterise finer-scale processes and phenomena, which are better captured by integrated surface geophysical methods. Here, we demonstrate the use of electrical resistivity imaging (ERI), electromagnetic induction (EMI), ground penetrating radar (GPR) and infrared imaging over multiple summer field seasons around the highly dynamic Twelvemile Lake, Yukon Flats, central Alaska, USA. Twelvemile Lake has generally receded in the past 30 yr, allowing permafrost aggradation in the receded margins, resulting in a mosaic of transient frozen ground adjacent to thick, older permafrost outside the original lakebed. ERI and EMI best evaluated the thickness of shallow, thin permafrost aggradation, which was not clear from frost probing or GPR surveys. GPR most precisely estimated the depth of the active layer, which forward electrical resistivity modelling indicated to be a difficult target for electrical methods, but could be more tractable in time-lapse mode. Infrared imaging of freshly dug soil pit walls captured active-layer thermal gradients at unprecedented resolution, which may be useful in calibrating emerging numerical models. GPR and EMI were able to cover landscape scales (several kilometres) efficiently, and new analysis software showcased here yields calibrated EMI data that reveal the complicated distribution of shallow permafrost in a transitional landscape.</span></p>","language":"English","publisher":"Wiley","doi":"10.1002/ppp.1893","usgsCitation":"Briggs, M.A., Campbell, S., Nolan, J., Walvoord, M.A., Ntarlagiannis, D., Day-Lewis, F.D., and Lane, J.W., 2017, Surface geophysical methods for characterising frozen ground in transitional permafrost landscapes: Permafrost and Periglacial Processes, v. 28, no. 1, p. 52-65, https://doi.org/10.1002/ppp.1893.","productDescription":"14 p.","startPage":"52","endPage":"65","ipdsId":"IP-069599","costCenters":[{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true}],"links":[{"id":438431,"rank":0,"type":{"id":30,"text":"Data Release"},"url":"https://doi.org/10.5066/P9UST855","text":"USGS data release","linkHelpText":"Surface geophysical data for characterizing shallow, discontinuous frozen ground near Fort Yukon, Alaska"},{"id":339120,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -145.5,\n              66.45\n            ],\n            [\n              -145.25,\n              66.45\n            ],\n            [\n              -145.25,\n              66.6\n            ],\n            [\n              -145.5,\n              66.6\n            ],\n            [\n              -145.5,\n              66.45\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"28","issue":"1","publishingServiceCenter":{"id":9,"text":"Reston PSC"},"noUsgsAuthors":false,"publicationDate":"2016-05-24","publicationStatus":"PW","scienceBaseUri":"58e4b0b1e4b09da67999777a","contributors":{"authors":[{"text":"Briggs, Martin A. 0000-0003-3206-4132 mbriggs@usgs.gov","orcid":"https://orcid.org/0000-0003-3206-4132","contributorId":4114,"corporation":false,"usgs":true,"family":"Briggs","given":"Martin","email":"mbriggs@usgs.gov","middleInitial":"A.","affiliations":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":610,"text":"Utah Water Science Center","active":true,"usgs":true},{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true},{"id":493,"text":"Office of Ground Water","active":true,"usgs":true}],"preferred":true,"id":688344,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Campbell, Seth","contributorId":190402,"corporation":false,"usgs":false,"family":"Campbell","given":"Seth","affiliations":[],"preferred":false,"id":688345,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nolan, Jay","contributorId":190403,"corporation":false,"usgs":false,"family":"Nolan","given":"Jay","email":"","affiliations":[],"preferred":false,"id":688346,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Walvoord, Michelle Ann 0000-0003-4269-8366 walvoord@usgs.gov","orcid":"https://orcid.org/0000-0003-4269-8366","contributorId":147211,"corporation":false,"usgs":true,"family":"Walvoord","given":"Michelle","email":"walvoord@usgs.gov","middleInitial":"Ann","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":688347,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ntarlagiannis, Dimitrios","contributorId":150729,"corporation":false,"usgs":false,"family":"Ntarlagiannis","given":"Dimitrios","affiliations":[{"id":12727,"text":"Rutgers University","active":true,"usgs":false}],"preferred":false,"id":688348,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Day-Lewis, Frederick D. 0000-0003-3526-886X daylewis@usgs.gov","orcid":"https://orcid.org/0000-0003-3526-886X","contributorId":1672,"corporation":false,"usgs":true,"family":"Day-Lewis","given":"Frederick","email":"daylewis@usgs.gov","middleInitial":"D.","affiliations":[{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":493,"text":"Office of Ground Water","active":true,"usgs":true}],"preferred":true,"id":688349,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Lane, John W. Jr. 0000-0002-3558-243X jwlane@usgs.gov","orcid":"https://orcid.org/0000-0002-3558-243X","contributorId":189168,"corporation":false,"usgs":true,"family":"Lane","given":"John","suffix":"Jr.","email":"jwlane@usgs.gov","middleInitial":"W.","affiliations":[{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true},{"id":493,"text":"Office of Ground Water","active":true,"usgs":true}],"preferred":false,"id":688350,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70186296,"text":"70186296 - 2017 - Advancing the match-mismatch framework for large herbivores in the Arctic: Evaluating the evidence for a trophic mismatch in caribou","interactions":[],"lastModifiedDate":"2017-04-04T11:50:35","indexId":"70186296","displayToPublicDate":"2017-03-01T00:00:00","publicationYear":"2017","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2980,"text":"PLoS ONE","active":true,"publicationSubtype":{"id":10}},"title":"Advancing the match-mismatch framework for large herbivores in the Arctic: Evaluating the evidence for a trophic mismatch in caribou","docAbstract":"<p><span>Climate-induced shifts in plant phenology may adversely affect animals that cannot or do not shift the timing of their reproductive cycle. The realized effect of potential trophic “mismatches” between a consumer and its food varies with the degree to which species rely on dietary income and stored capital. Large Arctic herbivores rely heavily on maternal capital to reproduce and give birth near the onset of the growing season but are they vulnerable to trophic mismatch? We evaluated the long-term changes in the temperatures and characteristics of the growing seasons (1970–2013), and compared growing conditions and dynamics of forage quality for caribou at peak parturition, peak lactation, and peak forage biomass, and plant senescence between two distinct time periods over 36 years (1977 and 2011–13). Despite advanced thaw dates (7−12 days earlier), increased growing season lengths (15−21 days longer), and consistent parturition dates, we found no decline in forage quality and therefore no evidence within this dataset for a trophic mismatch at peak parturition or peak lactation from 1977 to 2011–13. In Arctic ungulates that use stored capital for reproduction, reproductive demands are largely met by body stores deposited in the previous summer and autumn, which reduces potential adverse effects of any mismatch between food availability and timing of parturition. Climate-induced effects on forages growing in the summer and autumn ranges, however, do correspond with the demands of female caribou and their offspring to gain mass for the next reproductive cycle and winter. Therefore, we suggest the window of time to examine the match-mismatch framework in Arctic ungulates is not at parturition but in late summer-autumn, where the multiplier effects of small changes in forage quality are amplified by forage abundance, peak forage intake, and resultant mass gains in mother-offspring pairs.</span></p>","language":"English","publisher":"PLOS","doi":"10.1371/journal.pone.0171807","usgsCitation":"Gustine, D.D., Barboza, P., Adams, L., Griffith, B., Cameron, R.D., and Whitten, K.R., 2017, Advancing the match-mismatch framework for large herbivores in the Arctic: Evaluating the evidence for a trophic mismatch in caribou: PLoS ONE, v. 12, no. 2, p. 1-18, https://doi.org/10.1371/journal.pone.0171807.","productDescription":"e0171807; 18 p.","startPage":"1","endPage":"18","ipdsId":"IP-061147","costCenters":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"links":[{"id":470052,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1371/journal.pone.0171807","text":"Publisher Index Page"},{"id":339127,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -148.9306640625,\n              68.65255607018035\n            ],\n            [\n              -147.67822265625,\n              68.65255607018035\n            ],\n            [\n              -147.67822265625,\n              70.4257596280135\n            ],\n            [\n              -148.9306640625,\n              70.4257596280135\n            ],\n            [\n              -148.9306640625,\n              68.65255607018035\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"12","issue":"2","publishingServiceCenter":{"id":12,"text":"Tacoma PSC"},"noUsgsAuthors":false,"publicationDate":"2017-02-23","publicationStatus":"PW","scienceBaseUri":"58e4b0b1e4b09da67999777c","contributors":{"authors":[{"text":"Gustine, David D. dgustine@usgs.gov","contributorId":3776,"corporation":false,"usgs":true,"family":"Gustine","given":"David","email":"dgustine@usgs.gov","middleInitial":"D.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":688231,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Barboza, Perry","contributorId":190361,"corporation":false,"usgs":false,"family":"Barboza","given":"Perry","affiliations":[],"preferred":false,"id":688232,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Adams, Layne G. 0000-0001-6212-2896 ladams@usgs.gov","orcid":"https://orcid.org/0000-0001-6212-2896","contributorId":2776,"corporation":false,"usgs":true,"family":"Adams","given":"Layne G.","email":"ladams@usgs.gov","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":688230,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Griffith, Brad","contributorId":190362,"corporation":false,"usgs":false,"family":"Griffith","given":"Brad","affiliations":[],"preferred":false,"id":688233,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Cameron, Raymond D.","contributorId":190363,"corporation":false,"usgs":false,"family":"Cameron","given":"Raymond","email":"","middleInitial":"D.","affiliations":[{"id":7058,"text":"Alaska Department of Fish and Game","active":true,"usgs":false}],"preferred":false,"id":688234,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Whitten, Kenneth R.","contributorId":190408,"corporation":false,"usgs":false,"family":"Whitten","given":"Kenneth","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":688370,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70193033,"text":"70193033 - 2017 - Top-down control of invertebrates by Ninespine Stickleback in Arctic ponds","interactions":[],"lastModifiedDate":"2018-06-20T20:06:56","indexId":"70193033","displayToPublicDate":"2017-03-01T00:00:00","publicationYear":"2017","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1699,"text":"Freshwater Science","active":true,"publicationSubtype":{"id":10}},"title":"Top-down control of invertebrates by Ninespine Stickleback in Arctic ponds","docAbstract":"<p><span>Despite their widespread presence in northern-latitude ecosystems, the ecological role of Ninespine Stickleback&nbsp;</span><i>Pungitius pungitius</i><span><span>&nbsp;</span>is not well understood. Ninespine Stickleback can occupy both top and intermediate trophic levels in freshwater ecosystems, so their role in food webs as a predator on invertebrates and as a forage fish for upper level consumers probably is substantial. We introduced Ninespine Sticklebacks to fishless ponds to elucidate their potential effects as a predator on invertebrate communities in Arctic lentic freshwaters. We hypothesized that Ninespine Stickleback would affect freshwater invertebrate communities in a top-down manner. We predicted that the addition of Ninespine Sticklebacks to fishless ponds would: 1) reduce invertebrate taxonomic richness, 2) decrease overall invertebrate abundance, 3) reduce invertebrate biomass, and 4) decrease average invertebrate body size. We tested our hypothesis at 2 locations by adding Ninespine Stickleback to isolated ponds and compared invertebrate communities over time between fish-addition and fishless control ponds. Ninespine Sticklebacks exerted strong top-down pressure on invertebrate communities mainly by changing invertebrate taxonomic richness and biomass and, to a lesser extent, abundance and average invertebrate size. Our results supported the hypothesis that Ninespine Stickleback may help shape lentic food webs in the Arctic.</span></p>","language":"English","publisher":"The University of Chicago Press","doi":"10.1086/690675","usgsCitation":"Laske, S.M., Rosenberger, A.E., Kane, W.J., Wipfli, M.S., and Zimmerman, C.E., 2017, Top-down control of invertebrates by Ninespine Stickleback in Arctic ponds: Freshwater Science, v. 36, no. 1, p. 124-137, https://doi.org/10.1086/690675.","productDescription":"14 p.","startPage":"124","endPage":"137","ipdsId":"IP-076980","costCenters":[{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true}],"links":[{"id":348315,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -157.7471923828125,\n              70.12542991464234\n            ],\n            [\n              -154.423828125,\n              70.12542991464234\n            ],\n            [\n              -154.423828125,\n              71.41317683396566\n            ],\n            [\n              -157.7471923828125,\n              71.41317683396566\n            ],\n            [\n              -157.7471923828125,\n              70.12542991464234\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"36","issue":"1","publishingServiceCenter":{"id":12,"text":"Tacoma PSC"},"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5a07e929e4b09af898c8cc03","contributors":{"authors":[{"text":"Laske, Sarah M. 0000-0002-6096-0420 slaske@usgs.gov","orcid":"https://orcid.org/0000-0002-6096-0420","contributorId":204872,"corporation":false,"usgs":true,"family":"Laske","given":"Sarah","email":"slaske@usgs.gov","middleInitial":"M.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":120,"text":"Alaska Science Center Water","active":true,"usgs":true}],"preferred":true,"id":720804,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rosenberger, Amanda E. 0000-0002-5520-8349 arosenberger@usgs.gov","orcid":"https://orcid.org/0000-0002-5520-8349","contributorId":5581,"corporation":false,"usgs":true,"family":"Rosenberger","given":"Amanda","email":"arosenberger@usgs.gov","middleInitial":"E.","affiliations":[{"id":198,"text":"Coop Res Unit Atlanta","active":true,"usgs":true},{"id":396,"text":"Missouri Water Science Center","active":true,"usgs":true}],"preferred":true,"id":720805,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kane, William J.","contributorId":200058,"corporation":false,"usgs":false,"family":"Kane","given":"William","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":720806,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Wipfli, Mark S. 0000-0002-4856-6068 mwipfli@usgs.gov","orcid":"https://orcid.org/0000-0002-4856-6068","contributorId":1425,"corporation":false,"usgs":true,"family":"Wipfli","given":"Mark","email":"mwipfli@usgs.gov","middleInitial":"S.","affiliations":[{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true}],"preferred":true,"id":720807,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Zimmerman, Christian E. 0000-0002-3646-0688 czimmerman@usgs.gov","orcid":"https://orcid.org/0000-0002-3646-0688","contributorId":410,"corporation":false,"usgs":true,"family":"Zimmerman","given":"Christian","email":"czimmerman@usgs.gov","middleInitial":"E.","affiliations":[{"id":120,"text":"Alaska Science Center Water","active":true,"usgs":true},{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":720808,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
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