No abstract available.
","language":"English","publisher":"Geological Association of Canada","usgsCitation":"Nelson, J.L., Colpron, M., Piercey, S., Dusel-Bacon, C., Murphy, D., and Roots, C., 2006, Paleozoic tectonic and metallogenetic evolution of pericratonic terranes in Yukon, northern British Columbia and eastern Alaska: Special Paper - Geological Association of Canada, v. 45, p. 323-360.","productDescription":"38 p.","startPage":"323","endPage":"360","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":370465,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":370464,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://www.sjpgeoconsulting.com/SJPGeoConsulting/Publications.html"}],"country":"United States, Canada","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -158.115234375,\n 55.62799595426723\n ],\n [\n -140.537109375,\n 59.5343180010956\n ],\n [\n -127.61718749999999,\n 48.16608541901253\n ],\n [\n -120.14648437499999,\n 58.859223547066584\n ],\n [\n -120.76171875,\n 69.65708627301174\n ],\n [\n -141.15234374999997,\n 69.53451763078358\n ],\n [\n -161.3671875,\n 70.55417853776078\n ],\n [\n -158.115234375,\n 55.62799595426723\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"45","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Nelson, JoAnne L.","contributorId":221362,"corporation":false,"usgs":false,"family":"Nelson","given":"JoAnne","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":777953,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Colpron, Maurice","contributorId":221363,"corporation":false,"usgs":false,"family":"Colpron","given":"Maurice","email":"","affiliations":[],"preferred":false,"id":777954,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Piercey, Stephen","contributorId":221364,"corporation":false,"usgs":false,"family":"Piercey","given":"Stephen","email":"","affiliations":[],"preferred":false,"id":777955,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dusel-Bacon, Cynthia 0000-0001-8481-739X cdusel@usgs.gov","orcid":"https://orcid.org/0000-0001-8481-739X","contributorId":2797,"corporation":false,"usgs":true,"family":"Dusel-Bacon","given":"Cynthia","email":"cdusel@usgs.gov","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":777956,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Murphy, Donald","contributorId":221365,"corporation":false,"usgs":false,"family":"Murphy","given":"Donald","email":"","affiliations":[],"preferred":false,"id":777957,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Roots, Charlie","contributorId":221366,"corporation":false,"usgs":false,"family":"Roots","given":"Charlie","email":"","affiliations":[],"preferred":false,"id":777958,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70207419,"text":"70207419 - 2006 - Lead isotopic constraints on the metallogeny of middle and late Paleozoic syngenetic base metal occurrences in the Yukon-Tanana and Slide Mountain/Seventymile Terranes and adjacent portions of the North American miogeocline","interactions":[],"lastModifiedDate":"2019-12-19T09:31:19","indexId":"70207419","displayToPublicDate":"2006-01-02T09:28:30","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3458,"text":"Special Paper - Geological Association of Canada","active":true,"publicationSubtype":{"id":10}},"title":"Lead isotopic constraints on the metallogeny of middle and late Paleozoic syngenetic base metal occurrences in the Yukon-Tanana and Slide Mountain/Seventymile Terranes and adjacent portions of the North American miogeocline","docAbstract":"No abstract available.
","language":"English","publisher":"Geological Association of Canada","usgsCitation":"Mortensen, J., Dusel-Bacon, C., Hunt, J., and Gabites, J., 2006, Lead isotopic constraints on the metallogeny of middle and late Paleozoic syngenetic base metal occurrences in the Yukon-Tanana and Slide Mountain/Seventymile Terranes and adjacent portions of the North American miogeocline: Special Paper - Geological Association of Canada, v. 45, p. 261-280.","productDescription":"20 p.","startPage":"261","endPage":"280","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":370461,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States, Canada","state":"Alaska","otherGeospatial":"Yukon Territory","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -154.599609375,\n 61.10078883158897\n ],\n [\n -141.064453125,\n 61.10078883158897\n ],\n [\n -122.958984375,\n 59.7563950493563\n ],\n [\n -122.431640625,\n 64.69910544204765\n ],\n [\n -141.064453125,\n 68.5924865825295\n ],\n [\n -154.599609375,\n 68.5924865825295\n ],\n [\n -154.599609375,\n 61.10078883158897\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"45","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Mortensen, J.K. 0000-0001-8805-9856","orcid":"https://orcid.org/0000-0001-8805-9856","contributorId":201246,"corporation":false,"usgs":false,"family":"Mortensen","given":"J.K.","email":"","affiliations":[],"preferred":false,"id":777942,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dusel-Bacon, Cynthia 0000-0001-8481-739X cdusel@usgs.gov","orcid":"https://orcid.org/0000-0001-8481-739X","contributorId":2797,"corporation":false,"usgs":true,"family":"Dusel-Bacon","given":"Cynthia","email":"cdusel@usgs.gov","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":777943,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hunt, J.","contributorId":18297,"corporation":false,"usgs":true,"family":"Hunt","given":"J.","email":"","affiliations":[],"preferred":false,"id":777944,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Gabites, J.","contributorId":221367,"corporation":false,"usgs":false,"family":"Gabites","given":"J.","email":"","affiliations":[],"preferred":false,"id":777945,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70207418,"text":"70207418 - 2006 - Paleozoic tectonic and metallogenic evolution of the pericratonic rocks of east-central Alaska and adjacent Yukon Territory","interactions":[],"lastModifiedDate":"2019-12-19T09:26:14","indexId":"70207418","displayToPublicDate":"2006-01-02T09:18:55","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3458,"text":"Special Paper - Geological Association of Canada","active":true,"publicationSubtype":{"id":10}},"title":"Paleozoic tectonic and metallogenic evolution of the pericratonic rocks of east-central Alaska and adjacent Yukon Territory","docAbstract":"No abstract available.
","language":"English","publisher":"Geological Association of Canada","usgsCitation":"Nelson, J.L., Colpron, M., Piercey, S., Dusel-Bacon, C., Murphy, D., and Roots, C., 2006, Paleozoic tectonic and metallogenic evolution of the pericratonic rocks of east-central Alaska and adjacent Yukon Territory: Special Paper - Geological Association of Canada, v. 45, p. 25-74.","productDescription":"50 p.","startPage":"25","endPage":"74","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":370460,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":370459,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://www.sjpgeoconsulting.com/SJPGeoConsulting/Publications.html"}],"country":"United States, Canada","state":"Alaska","otherGeospatial":"Yukon Territory ","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -154.599609375,\n 61.10078883158897\n ],\n [\n -141.064453125,\n 61.10078883158897\n ],\n [\n -122.958984375,\n 59.7563950493563\n ],\n [\n -122.431640625,\n 64.69910544204765\n ],\n [\n -141.064453125,\n 68.5924865825295\n ],\n [\n -154.599609375,\n 68.5924865825295\n ],\n [\n -154.599609375,\n 61.10078883158897\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"45","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Nelson, JoAnne L.","contributorId":221362,"corporation":false,"usgs":false,"family":"Nelson","given":"JoAnne","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":777936,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Colpron, Maurice","contributorId":221363,"corporation":false,"usgs":false,"family":"Colpron","given":"Maurice","email":"","affiliations":[],"preferred":false,"id":777937,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Piercey, Stephen","contributorId":221364,"corporation":false,"usgs":false,"family":"Piercey","given":"Stephen","email":"","affiliations":[],"preferred":false,"id":777938,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dusel-Bacon, Cynthia 0000-0001-8481-739X cdusel@usgs.gov","orcid":"https://orcid.org/0000-0001-8481-739X","contributorId":2797,"corporation":false,"usgs":true,"family":"Dusel-Bacon","given":"Cynthia","email":"cdusel@usgs.gov","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":777939,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Murphy, Donald","contributorId":221365,"corporation":false,"usgs":false,"family":"Murphy","given":"Donald","email":"","affiliations":[],"preferred":false,"id":777940,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Roots, Charlie","contributorId":221366,"corporation":false,"usgs":false,"family":"Roots","given":"Charlie","email":"","affiliations":[],"preferred":false,"id":777941,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70129584,"text":"70129584 - 2006 - Sedimentary processes in modern and ancient oceanic arc settings: evidence from the Jurassic Talkeetna Formation of Alaska and the Mariana and Tonga Arcs, western Pacific","interactions":[],"lastModifiedDate":"2014-10-23T15:17:22","indexId":"70129584","displayToPublicDate":"2006-01-01T15:10:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2451,"text":"Journal of Sedimentary Research","onlineIssn":"1938-3681","printIssn":"1527-1404","active":true,"publicationSubtype":{"id":10}},"title":"Sedimentary processes in modern and ancient oceanic arc settings: evidence from the Jurassic Talkeetna Formation of Alaska and the Mariana and Tonga Arcs, western Pacific","docAbstract":"Sediment deposited around oceanic volcanic ares potentially provides the most complete record of the tectonic and geochemical evolution of active margins. The use of such tectonic and geochemical records requires an accurate understanding of sedimentary dynamics in an arc setting: processes of deposition and reworking that affect the degree to which sediments represent the contemporaneous volcanism at the time of their deposition. We review evidence from the modern Mariana and Tonga arcs and the ancient arc crustal section in the Lower Jurassic Talkeetna Formation of south-central Alaska, and introduce new data from the Mariana Arc, to produce a conceptual model of volcaniclastic sedimentation processes in oceanic arc settings. All three arcs are interpreted to have formed in tectonically erosive margin settings, resulting in long-term extension and subsidence. Debris aprons composed of turbidites and debris flow deposits occur in the immediate vicinity of arc volcanoes, forming relatively continuous mass-wasted volcaniclastic records in abundant accommodation space. There is little erosion or reworking of old volcanic materials near the arc volcanic front. Tectonically generated topography in the forearc effectively blocks sediment flow from the volcanic front to the trench; although some canyons deliver sediment to the trench slope, most volcaniclastic sedimentation is limited to the area immediately around volcanic centers. Arc sedimentary sections in erosive plate margins can provide comprehensive records of volcanism and tectonism spanning < 10 My. The chemical evolution of a limited section of an oceanic arc may be best reconstructed from sediments of the debris aprons for intervals up to ~ 20 My but no longer, because subduction erosion causes migration of the forearc basin crust and its sedimentary cover toward the trench, where there is little volcaniclastic sedimentation and where older sediments are dissected and reworked along the trench slope.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Sedimentary Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Society for Sedimentary Geology","doi":"10.2110/jsr.2006.044","usgsCitation":"Draut, A.E., and Clift, P., 2006, Sedimentary processes in modern and ancient oceanic arc settings: evidence from the Jurassic Talkeetna Formation of Alaska and the Mariana and Tonga Arcs, western Pacific: Journal of Sedimentary Research, v. 76, no. 3, p. 493-514, https://doi.org/10.2110/jsr.2006.044.","productDescription":"22 p.","startPage":"493","endPage":"514","numberOfPages":"22","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":295695,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":295694,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2110/jsr.2006.044"}],"country":"United States","state":"Alaska","otherGeospatial":"Mariana Arc, Talkeetna formation, Tonga Arc","volume":"76","issue":"3","noUsgsAuthors":false,"publicationDate":"2006-04-12","publicationStatus":"PW","scienceBaseUri":"544a190fe4b04d2014abfb74","contributors":{"authors":[{"text":"Draut, Amy E.","contributorId":108424,"corporation":false,"usgs":true,"family":"Draut","given":"Amy","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":503876,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Clift, Peter D.","contributorId":103203,"corporation":false,"usgs":true,"family":"Clift","given":"Peter D.","affiliations":[],"preferred":false,"id":503875,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":85885,"text":"85885 - 2006 - Estimating Potential Effects of Hypothetical Oil Spills on Polar Bears","interactions":[],"lastModifiedDate":"2018-05-09T19:26:34","indexId":"85885","displayToPublicDate":"2006-01-01T01:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":6,"text":"USGS Unnumbered Series"},"title":"Estimating Potential Effects of Hypothetical Oil Spills on Polar Bears","docAbstract":"Much is known about the transport and fate of oil spilled into the sea and its toxicity to exposed wildlife. Previously, however, there has been no way to quantify the probability that wildlife dispersed over the seascape would be exposed to spilled oil. Polar bears, the apical predator of the arctic, are widely dispersed near the continental shelves of the Arctic Ocean, an area also undergoing considerable hydrocarbon exploration and development. We used 15,308 satellite locations from 194 radiocollared polar bears to estimate the probability that polar bears could be exposed to hypothetical oil spills. We used a true 2 dimensional Gausian kernel density estimator, to estimate the number of bears likely to occur in each 1.00 km2 cell of a grid superimposed over near shore areas surrounding 2 oil production facilities: the existing Northstar oil production facility, and the proposed offshore site for the Liberty production facility. We estimated the standard errors of bear numbers per cell with bootstrapping. Simulated oil spill footprints for September and October, the times during which we hypothesized effects of an oil-spill would be worst, were estimated using real wind and current data collected between 1980 and 1996. We used ARC/Info software to calculate overlap (numbers of bears oiled) between simulated oil-spill footprints and polar bear grid-cell values. Numbers of bears potentially oiled by a hypothetical 5912 barrel spill (the largest spill thought probable from a pipeline breach) ranged from 0 to 27 polar bears for September open water conditions, and from 0 to 74 polar bears in October mixed ice conditions. Median numbers oiled by the 5912 barrel hypothetical spill from the Liberty simulation in September and October were 1 and 3 bears, equivalent values for the Northstar simulation were 3 and 11 bears. In October, 75% of trajectories from the 5912 barrel simulated spill at Liberty oiled 9 or fewer bears while 75% of the trajectories affected 20 or fewer polar bears when we simulated an October spill at the Northstar site. Northstar Island is nearer the active ice flaw zone than Liberty. Simulations suggested that oil spilled at Northstar would spread more effectively and more consistently into surrounding areas. Also, polar bear densities are consistently higher near Northstar. Oil spills simulated for the Liberty site were more erratic in the areas they covered and the numbers of bears impacted, and numbers of bears hypothetically exposed were usually smaller. Methods described here are broadly applicable to other dispersed marine wildlife. Key words: Arctic, Beaufort Sea, clustering, kernel, management, oil spill, polar bears, population delineation, radiotelemetry, satellite, smoothing, Ursus maritimus
","language":"English","publisher":"U.S. Geological Survey, Alaska Science Center","doi":"10.3133/85885","usgsCitation":"Amstrup, S.C., Durner, G.M., McDonald, T.L., and Johnson, W., 2006, Estimating Potential Effects of Hypothetical Oil Spills on Polar Bears, https://doi.org/10.3133/85885.","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":127815,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":91990,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://www.polarbearsinternational.org/sites/default/files/scientists/amstrup_et_al_mms_oil_spill_2006.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ae0e4b07f02db688276","contributors":{"authors":[{"text":"Amstrup, Steven C.","contributorId":67034,"corporation":false,"usgs":false,"family":"Amstrup","given":"Steven","email":"","middleInitial":"C.","affiliations":[{"id":13182,"text":"Polar Bears International","active":true,"usgs":false}],"preferred":false,"id":296663,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Durner, George M. 0000-0002-3370-1191 gdurner@usgs.gov","orcid":"https://orcid.org/0000-0002-3370-1191","contributorId":3576,"corporation":false,"usgs":true,"family":"Durner","given":"George","email":"gdurner@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}],"preferred":true,"id":296662,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McDonald, T. L.","contributorId":101211,"corporation":false,"usgs":false,"family":"McDonald","given":"T.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":296665,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Johnson, W.R.","contributorId":100316,"corporation":false,"usgs":true,"family":"Johnson","given":"W.R.","email":"","affiliations":[],"preferred":false,"id":296664,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":1016488,"text":"1016488 - 2006 - Long-term golden eagle studies in Denali National Park and Preserve","interactions":[],"lastModifiedDate":"2013-03-17T19:59:02","indexId":"1016488","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":691,"text":"Alaska Park Science","printIssn":"1545- 496","active":true,"publicationSubtype":{"id":10}},"title":"Long-term golden eagle studies in Denali National Park and Preserve","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Alaska Park Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"McIntyre, C.L., Steenhof, K., Kochert, M.N., and Collopy, M.W., 2006, Long-term golden eagle studies in Denali National Park and Preserve: Alaska Park Science, v. 5, no. 1, p. 42-45.","productDescription":"p. 42-45","startPage":"42","endPage":"45","numberOfPages":"4","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":133286,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":269524,"type":{"id":11,"text":"Document"},"url":"https://www.nps.gov/akso/nature/science/ak_park_science/PDF/2006Vol5-1/Golden-Eagles.pdf"}],"volume":"5","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a6de4b07f02db63ee5e","contributors":{"authors":[{"text":"McIntyre, Carol L.","contributorId":94642,"corporation":false,"usgs":true,"family":"McIntyre","given":"Carol","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":324309,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Steenhof, Karen karen_steenhof@usgs.gov","contributorId":30585,"corporation":false,"usgs":true,"family":"Steenhof","given":"Karen","email":"karen_steenhof@usgs.gov","affiliations":[{"id":289,"text":"Forest and Rangeland Ecosys Science Center","active":true,"usgs":true}],"preferred":false,"id":324307,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kochert, Michael N. 0000-0002-4380-3298 mkochert@usgs.gov","orcid":"https://orcid.org/0000-0002-4380-3298","contributorId":3037,"corporation":false,"usgs":true,"family":"Kochert","given":"Michael","email":"mkochert@usgs.gov","middleInitial":"N.","affiliations":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true},{"id":289,"text":"Forest and Rangeland Ecosys Science Center","active":true,"usgs":true}],"preferred":true,"id":324306,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Collopy, Michael W.","contributorId":77890,"corporation":false,"usgs":false,"family":"Collopy","given":"Michael","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":324308,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70028049,"text":"70028049 - 2006 - Patterns of growth and body condition in sea otters from the Aleutian archipelago before and after the recent population decline","interactions":[],"lastModifiedDate":"2017-06-28T15:03:08","indexId":"70028049","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2158,"text":"Journal of Animal Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Patterns of growth and body condition in sea otters from the Aleutian archipelago before and after the recent population decline","docAbstract":"1. Growth models for body mass and length were fitted to data collected from 1842 sea otters Enhydra lutris shot or live-captured throughout south-west Alaska between 1967 and 2004. Growth curves were constructed for each of two main year groups: 1967–71 when the population was at or near carrying capacity and 1992–97 when the population was in steep decline. Analyses of data collected from animals caught during 2004, when the population density was very low, were precluded by a small sample size and consequently only examined incidentally to the main growth curves.
2. Growth curves demonstrated a significant increase in body mass and body length at age in the 1990s. Asymptotic values of body mass were 12–18% higher in the 1990s than in the 1960s/70s, and asymptotic values for body length were 10–11% higher between the same periods. Data collected in 2004 suggest a continued increase in body size, with nearly all data points for mass and length falling significantly above the 1990s growth curves.
3. In addition to larger asymptotic values for mass and length, the rate of growth towards asymptotic values was more rapid in the 1990s than in the 1960s/70s: sea otters reached 95% of asymptotic body mass and body length 1–2 years earlier in the 1990s.
4. Body condition (as measured by the log mass/log length ratio) was significantly greater in males than in females. There was also an increasing trend from the 1960s/70s through 2004 despite much year-to-year variation.
5. Population age structures differed significantly between the 1960s/70s and the 1990s with the latter distribution skewed toward younger age classes (indicating an altered lxfunction) suggesting almost complete relaxation of age-dependent mortality patterns (i.e. those typical of food-limited populations).
6. This study spanned a period of time over which the population status of sea otters in the Aleutian archipelago declined precipitously from levels at or near equilibrium densities at some islands in the 1960s/70s to < 5% of estimated carrying capacity by the late 1990s. The results of this study indicate an improved overall health of sea otters over the period of decline and suggest that limited nutritional resources were not the cause of the observed reduced population abundance. Our findings are consistent with the hypothesis that the decline was caused by increased killer whale predation.
The immune system plays an important role in fitness, and interindividual variation in immunocompetence is due to several factors including food supply.
Seasonal variation in food resources may therefore explain why immunocompetence in bird nestlings usually declines throughout the breeding season, with chicks born early in the season receiving more food than chicks born later, and thereby possibly developing a more potent immune system. Although there are studies supporting this hypothesis, none has been experimental.
We performed an experiment in the kittiwake Rissa tridactyla by manipulating the food supply of pairs that were left to produce a first brood, and of pairs that were induced to produce a late replacement brood.
If food supply mediates, at least partially, seasonal variations in chick immunocompetence, non‐food‐supplemented chicks would show a stronger seasonal decline in immunocompetence than food‐supplemented chicks.
Food supplementation improved humoral immunocompetence (the production of immunoglobulins Y), but not T‐cell immunocompetence (phytohaemagglutinin, PHA response). T‐cell immunocompetence of food‐supplemented and non‐food‐supplemented chicks decreased through the season but to a similar extent, whereas the humoral immunocompetence of non‐food‐supplemented chicks decreased more strongly than that of food‐supplemented chicks.
Our results suggest that the seasonal decline in humoral immunocompetence can be explained, at least partly, by variations in food supply throughout the breeding season.
On January 11, 2006 Augustine Volcano erupted after nearly 20 years of quiescence. Global Positioning System (GPS) instrumentation at Augustine, consisting of six continuously recording, telemetered receivers, measured clear precursory deformation consistent with a source of inflation or pressurization beneath the volcano's summit at a depth of around sea level. Deformation began in early summer 2005, and was preceded by a subtle, but distinct, increase in seismicity, which began in May 2005. After remaining more or less constant, deformation rates accelerated on at least three stations beginning in late November 2005. After this date, GPS data suggest the upward propagation of a small dike into the edifice, which, based on the style of deformation and high levels of gas emission, appears to have ascended to shallow levels by mid-December 2005, about four weeks before the eruption began.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2006GL027219","issn":"00948276","usgsCitation":"Cervelli, P., Fournier, T., Freymueller, J., and Power, J., 2006, Ground deformation associated with the precursory unrest and early phases of the January 2006 eruption of Augustine volcano, Alaska: Geophysical Research Letters, v. 33, no. 18, L18304, 5 p., https://doi.org/10.1029/2006GL027219.","productDescription":"L18304, 5 p.","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":477611,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006gl027219","text":"Publisher Index Page"},{"id":237330,"rank":1,"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 -153.51470947265625,\n 59.412945785071\n ],\n [\n -153.47625732421875,\n 59.41993301322722\n ],\n [\n -153.446044921875,\n 59.428315784042574\n ],\n [\n -153.39385986328125,\n 59.428315784042574\n ],\n [\n -153.36090087890622,\n 59.41574084934491\n ],\n [\n -153.34442138671875,\n 59.39477224351409\n ],\n [\n -153.31695556640625,\n 59.37658895163648\n ],\n [\n -153.32794189453125,\n 59.33599107056162\n ],\n [\n -153.37188720703125,\n 59.32338185310805\n ],\n [\n -153.446044921875,\n 59.31777625443006\n ],\n [\n -153.5394287109375,\n 59.31076795603884\n ],\n [\n -153.577880859375,\n 59.32618430580267\n ],\n [\n -153.577880859375,\n 59.35139598294652\n ],\n [\n -153.60260009765625,\n 59.379387015928536\n ],\n [\n -153.59161376953125,\n 59.404559208021745\n ],\n [\n -153.55865478515625,\n 59.410150490100754\n ],\n [\n -153.51470947265625,\n 59.412945785071\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"33","issue":"18","noUsgsAuthors":false,"publicationDate":"2006-09-20","publicationStatus":"PW","scienceBaseUri":"505a2a91e4b0c8380cd5b2a0","contributors":{"authors":[{"text":"Cervelli, P.F.","contributorId":86553,"corporation":false,"usgs":true,"family":"Cervelli","given":"P.F.","affiliations":[],"preferred":false,"id":416573,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fournier, T.","contributorId":78964,"corporation":false,"usgs":true,"family":"Fournier","given":"T.","email":"","affiliations":[],"preferred":false,"id":416572,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Freymueller, Jeffrey T.","contributorId":96841,"corporation":false,"usgs":false,"family":"Freymueller","given":"Jeffrey T.","affiliations":[{"id":26875,"text":"Michigan State University, East Lansing, MI","active":true,"usgs":false}],"preferred":false,"id":416574,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Power, J.A.","contributorId":20765,"corporation":false,"usgs":true,"family":"Power","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":416571,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70028120,"text":"70028120 - 2006 - Persistence of 10-year old Exxon Valdez oil on Gulf of Alaska beaches: The importance of boulder-armoring","interactions":[],"lastModifiedDate":"2017-03-08T12:21:51","indexId":"70028120","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","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":"Persistence of 10-year old Exxon Valdez oil on Gulf of Alaska beaches: The importance of boulder-armoring","docAbstract":"Oil stranded as a result of the 1989 Exxon Valdez spill has persisted for >10 years at study sites on Gulf of Alaska shores distant from the spill's origin. These sites were contaminated by \"oil mousse\", which persists in these settings due to armoring of underlying sediments and their included oil beneath boulders. The boulder-armored beaches that we resampled in 1999 showed continued contamination by subsurface oil, despite their exposure to moderate to high wave energies. Significant declines in surface oil cover occurred at all study sites. In contrast, mousse has persisted under boulders in amounts similar to what was present in 1994 and probably in 1989. Especially striking is the general lack of weathering of this subsurface oil over the last decade. Oil at five of the six armored-beach sites 10 years after the spill is compositionally similar to 11-day old Exxon Valdez oil. Analysis of movements in the boulder-armor that covers the study beaches reveals that only minor shifts have occurred since 1994, suggesting that over the last five, and probably over the last 10 years, boulder-armors have remained largely unmoved at the study sites. These findings emphasize the importance of particular geomorphic parameters in determining stranded oil persistence. Surface armoring, combined with stranding of oil mousse, results in the unexpectedly lengthy persistence of only lightly to moderately weathered oil within otherwise high-energy wave environments.
","language":"English","publisher":"Elsevier","doi":"10.1016/j.marpolbul.2006.01.005","issn":"0025326X","usgsCitation":"Irvine, G.V., Mann, D.H., and Short, J.W., 2006, Persistence of 10-year old Exxon Valdez oil on Gulf of Alaska beaches: The importance of boulder-armoring: Marine Pollution Bulletin, v. 52, no. 9, p. 1011-1022, https://doi.org/10.1016/j.marpolbul.2006.01.005.","productDescription":"12 p.","startPage":"1011","endPage":"1022","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"links":[{"id":236982,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Cook Inlet, Gulf of Alaska, Prince William Sound","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -157.91748046875,\n 56.18225387824831\n ],\n [\n -145.5908203125,\n 56.18225387824831\n ],\n [\n -145.5908203125,\n 61.7419302246182\n ],\n [\n -157.91748046875,\n 61.7419302246182\n ],\n [\n -157.91748046875,\n 56.18225387824831\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"52","issue":"9","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a76e0e4b0c8380cd7836a","contributors":{"authors":[{"text":"Irvine, Gail V. girvine@usgs.gov","contributorId":2368,"corporation":false,"usgs":true,"family":"Irvine","given":"Gail","email":"girvine@usgs.gov","middleInitial":"V.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":416639,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mann, Daniel H.","contributorId":67010,"corporation":false,"usgs":true,"family":"Mann","given":"Daniel","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":416637,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Short, Jeffrey W.","contributorId":26602,"corporation":false,"usgs":true,"family":"Short","given":"Jeffrey","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":416638,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70028137,"text":"70028137 - 2006 - The giant Carlin gold province: A protracted interplay of orogenic, basinal, and hydrothermal processes above a lithospheric boundary","interactions":[],"lastModifiedDate":"2012-03-12T17:20:51","indexId":"70028137","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2746,"text":"Mineralium Deposita","active":true,"publicationSubtype":{"id":10}},"title":"The giant Carlin gold province: A protracted interplay of orogenic, basinal, and hydrothermal processes above a lithospheric boundary","docAbstract":"Northern Nevada hosts the only province that contains multiple world-class Carlin-type gold deposits. The first-order control on the uniqueness of this province is its anomalous far back-arc tectonic setting over the rifted North American paleocontinental margin that separates Precambrian from Phanerozoic subcontinental lithospheric mantle. Globally, most other significant gold provinces form in volcanic arcs and accreted terranes proximal to convergent margins. In northern Nevada, periodic reactivation of basement faults along this margin focused and amplified subsequent geological events. Early basement faults localized Devonian synsedimentary extension and normal faulting. These controlled the geometry of the Devonian sedimentary basin architecture and focused the discharge of basinal brines that deposited syngenetic gold along the basin margins. Inversion of these basins and faults during subsequent contraction produced the complex elongate structural culminations that characterize the anomalous mineral deposit \"trends.\" Subsequently, these features localized repeated episodes of shallow magmatic and hydrothermal activity that also deposited some gold. During a pulse of Eocene extension, these faults focused advection of Carlin-type fluids, which had the opportunity to leach gold from gold-enriched sequences and deposit it in reactive miogeoclinal host rocks below the hydrologic seal at the Roberts Mountain thrust contact. Hence, the vast endowment of the Carlin province resulted from the conjunction of spatially superposed events localized by long-lived basement structures in a highly anomalous tectonic setting, rather than by the sole operation of special magmatic or fluid-related processes. An important indicator of the longevity of this basement control is the superposition of different gold deposit types (e.g., Sedex, porphyry, Carlin-type, epithermal, and hot spring deposits) that formed repeatedly between the Devonian and Miocene time along the trends. Interestingly, the large Cretaceous Alaska-Yukon intrusion-related gold deposits (e.g., Fort Knox) are associated with the northern extension of the same lithospheric margin in the Selwyn basin, which experienced an analogous series of geologic events. ?? Springer-Verlag 2006.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Mineralium Deposita","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s00126-006-0085-3","issn":"00264598","usgsCitation":"Emsbo, P., Groves, D., Hofstra, A., and Bierlein, F., 2006, The giant Carlin gold province: A protracted interplay of orogenic, basinal, and hydrothermal processes above a lithospheric boundary: Mineralium Deposita, v. 41, no. 6, p. 517-525, https://doi.org/10.1007/s00126-006-0085-3.","startPage":"517","endPage":"525","numberOfPages":"9","costCenters":[],"links":[{"id":210393,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s00126-006-0085-3"},{"id":237298,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"41","issue":"6","noUsgsAuthors":false,"publicationDate":"2006-08-08","publicationStatus":"PW","scienceBaseUri":"505bac84e4b08c986b32354f","contributors":{"authors":[{"text":"Emsbo, P.","contributorId":59901,"corporation":false,"usgs":true,"family":"Emsbo","given":"P.","affiliations":[],"preferred":false,"id":416706,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Groves, D.I.","contributorId":73616,"corporation":false,"usgs":true,"family":"Groves","given":"D.I.","email":"","affiliations":[],"preferred":false,"id":416707,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hofstra, A. H. 0000-0002-2450-1593","orcid":"https://orcid.org/0000-0002-2450-1593","contributorId":41426,"corporation":false,"usgs":true,"family":"Hofstra","given":"A. H.","affiliations":[],"preferred":false,"id":416705,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bierlein, F.P.","contributorId":74945,"corporation":false,"usgs":true,"family":"Bierlein","given":"F.P.","email":"","affiliations":[],"preferred":false,"id":416708,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70028152,"text":"70028152 - 2006 - Northern goshawk diet during the nesting season in southeast Alaska","interactions":[],"lastModifiedDate":"2017-11-15T14:31:27","indexId":"70028152","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","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":"Northern goshawk diet during the nesting season in southeast Alaska","docAbstract":"[No abstract available]","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Wildlife Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2193/0022-541X(2006)70[1151:NGDDTN]2.0.CO;2","issn":"0022541X","usgsCitation":"Lewis, S., Titus, K., and Fuller, M., 2006, Northern goshawk diet during the nesting season in southeast Alaska: Journal of Wildlife Management, v. 70, no. 4, p. 1151-1160, https://doi.org/10.2193/0022-541X(2006)70[1151:NGDDTN]2.0.CO;2.","startPage":"1151","endPage":"1160","numberOfPages":"10","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":237018,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":210176,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2193/0022-541X(2006)70[1151:NGDDTN]2.0.CO;2"}],"volume":"70","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a683de4b0c8380cd736c1","contributors":{"authors":[{"text":"Lewis, S.B.","contributorId":88701,"corporation":false,"usgs":true,"family":"Lewis","given":"S.B.","email":"","affiliations":[],"preferred":false,"id":416796,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Titus, K.","contributorId":93865,"corporation":false,"usgs":true,"family":"Titus","given":"K.","email":"","affiliations":[],"preferred":false,"id":416797,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Fuller, M.R.","contributorId":71278,"corporation":false,"usgs":true,"family":"Fuller","given":"M.R.","email":"","affiliations":[],"preferred":false,"id":416795,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70028162,"text":"70028162 - 2006 - Genetic characterization of Zostera asiatica on the Pacific Coast of North America","interactions":[],"lastModifiedDate":"2018-07-17T19:40:37","indexId":"70028162","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":861,"text":"Aquatic Botany","active":true,"publicationSubtype":{"id":10}},"title":"Genetic characterization of Zostera asiatica on the Pacific Coast of North America","docAbstract":"We gathered sequence information from the nuclear 5.8S rDNA gene and associated internal transcribed spacers, ITS-1 and ITS-2 (5.8S rDNA/ITS), and the chloroplast maturase K (matK) gene, from Zostera samples collected from subtidal habitats in Monterey and Santa Barbara (Isla Vista) bays, California, to test the hypothesis that these plants are conspecific with Z. asiatica Miki of Asia. Sequences from approximately 520 base pairs of the nuclear 5.8S rDNA/ITS obtained from the subtidal Monterey and Isla Vista Zostera samples were identical to homologous sequences obtained from Z. marina collected from intertidal habitats in Japan, Alaska, Oregon and California. Similarly, sequences from the matK gene from the subtidal Zostera samples were identical to matK sequences obtained from Z. marina collected from intertidal habitats in Japan, Alaska, Oregon and California, but differed from Z. asiatica sequences accessioned into GenBank. This suggests the subtidal plants are conspecific with Z. marina, not Z. asiatica. However, we found that herbarium samples accessioned into the Kyoto University Herbarium, determined to be Z. asiatica, yielded 5.8S rDNA/ITS sequences consistent with either Z. japonica, in two cases, or Z. marina, in one case. Similar results were observed for the chloroplast matK gene; we found haplotypes that were inconsistent with published matK sequences from Z. asiatica collected from Japan. These results underscore the need for closer examination of the relationship between Z. marina along the Pacific Coast of North America, and Z. asiatica of Asia, for the retention and verification of specimens examined in scientific studies, and for assessment of the usefulness of morphological characters in the determination of taxonomic relationships within Zosteraceae.
","language":"English","publisher":"Elsevier","doi":"10.1016/j.aquabot.2006.03.011","issn":"03043770","usgsCitation":"Talbot, S.L., Wyllie-Echeverria, S., Ward, D.H., Rearick, J.R., Sage, G.K., Chesney, B., and Phillips, R.C., 2006, Genetic characterization of Zostera asiatica on the Pacific Coast of North America: Aquatic Botany, v. 85, no. 3, p. 169-176, https://doi.org/10.1016/j.aquabot.2006.03.011.","productDescription":"8 p.","startPage":"169","endPage":"176","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":237160,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"85","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a156ae4b0c8380cd54ddb","contributors":{"authors":[{"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":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":416851,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wyllie-Echeverria, S.","contributorId":17819,"corporation":false,"usgs":true,"family":"Wyllie-Echeverria","given":"S.","affiliations":[],"preferred":false,"id":416848,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"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":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":416852,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rearick, Jolene R. 0000-0003-0942-8268 jrearick@usgs.gov","orcid":"https://orcid.org/0000-0003-0942-8268","contributorId":195245,"corporation":false,"usgs":true,"family":"Rearick","given":"Jolene","email":"jrearick@usgs.gov","middleInitial":"R.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":416849,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Sage, George K. 0000-0003-1431-2286 ksage@usgs.gov","orcid":"https://orcid.org/0000-0003-1431-2286","contributorId":87833,"corporation":false,"usgs":true,"family":"Sage","given":"George","email":"ksage@usgs.gov","middleInitial":"K.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":false,"id":416847,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Chesney, B.","contributorId":27250,"corporation":false,"usgs":true,"family":"Chesney","given":"B.","email":"","affiliations":[],"preferred":false,"id":416850,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Phillips, R. C.","contributorId":65655,"corporation":false,"usgs":true,"family":"Phillips","given":"R.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":416853,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70028187,"text":"70028187 - 2006 - Abrupt transitions during sustained explosive eruptions: Examples from the 1912 eruption of Novarupta, Alaska","interactions":[],"lastModifiedDate":"2017-11-03T18:23:13","indexId":"70028187","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1109,"text":"Bulletin of Volcanology","active":true,"publicationSubtype":{"id":10}},"title":"Abrupt transitions during sustained explosive eruptions: Examples from the 1912 eruption of Novarupta, Alaska","docAbstract":"Plinian/ignimbrite activity stopped briefly and abruptly 16 and 45 h after commencement of the 1912 Novarupta eruption defining three episodes of explosive volcanism before finally giving way after 60 h to effusion of lava domes. We focus here on the processes leading to the termination of the second and third of these three episodes. Early erupted pumice from both episodes show a very similar range in bulk vesicularity, but the modal values markedly decrease and the vesicularity range widens toward the end of Episode III. Clasts erupted at the end of each episode represent textural extremes; at the end of Episode II, clasts have very thin glass walls and a predominance of large bubbles, whereas at the end of Episode III, clasts have thick interstices and more small bubbles. Quantitatively, all clasts have very similar vesicle size distributions which show a division in the bubble population at 30 ??m vesicle diameter and cumulative number densities ranging from 107-109 cm-3. Patterns seen in histograms of volume fraction and the trends in the vesicle size data can be explained by coalescence signatures superimposed on an interval of prolonged nucleation and free growth of bubbles. Compared to experimental data for bubble growth in silicic melts, the high 1912 number densities suggest homogeneous nucleation was a significant if not dominant mechanism of bubble nucleation in the dacitic magma. The most distinct clast populations occurred toward the end of Plinian activity preceding effusive dome growth. Distributions skewed toward small sizes, thick walls, and teardrop vesicle shapes are indicative of bubble wall collapse marking maturation of the melt and onset of processes of outgassing. The data suggest that the superficially similar pauses in the 1912 eruption which marked the ends of episodes II and III had very different causes. Through Episode III, the trend in vesicle size data reflects a progressive shift in the degassing process from rapid magma ascent and coupled gas exsolution to slower ascent with partial open-system outgassing as a precursor to effusive dome growth. No such trend is visible in the Episode II clast assemblages; we suggest that external changes involving failure of the conduit/vent walls are more likely to have effected the break in explosive activity at 45 h. ?? Springer-Verlag 2006.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin of Volcanology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s00445-006-0067-4","issn":"02588900","usgsCitation":"Adams, N., Houghton, B.F., and Hildreth, W., 2006, Abrupt transitions during sustained explosive eruptions: Examples from the 1912 eruption of Novarupta, Alaska: Bulletin of Volcanology, v. 69, no. 2, p. 189-206, https://doi.org/10.1007/s00445-006-0067-4.","startPage":"189","endPage":"206","numberOfPages":"18","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":236986,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":210153,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s00445-006-0067-4"}],"volume":"69","issue":"2","noUsgsAuthors":false,"publicationDate":"2006-06-13","publicationStatus":"PW","scienceBaseUri":"5059e647e4b0c8380cd472ea","contributors":{"authors":[{"text":"Adams, N.K.","contributorId":83729,"corporation":false,"usgs":true,"family":"Adams","given":"N.K.","email":"","affiliations":[],"preferred":false,"id":416957,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Houghton, Bruce F. 0000-0002-7532-9770","orcid":"https://orcid.org/0000-0002-7532-9770","contributorId":140077,"corporation":false,"usgs":false,"family":"Houghton","given":"Bruce","email":"","middleInitial":"F.","affiliations":[{"id":6977,"text":"University of Hawai`i at Hilo","active":true,"usgs":false},{"id":13351,"text":"University of Hawaii Cooperative Studies Unit","active":true,"usgs":false}],"preferred":false,"id":416956,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hildreth, W. 0000-0002-7925-4251","orcid":"https://orcid.org/0000-0002-7925-4251","contributorId":100487,"corporation":false,"usgs":true,"family":"Hildreth","given":"W.","affiliations":[],"preferred":false,"id":416958,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70028217,"text":"70028217 - 2006 - Differences in Ichthyophonus prevalence and infection severity between upper Yukon River and Tanana River chinook salmon, Oncorhynchus tshawytscha (Walbaum), stocks","interactions":[],"lastModifiedDate":"2017-01-03T14:55:53","indexId":"70028217","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2286,"text":"Journal of Fish Diseases","active":true,"publicationSubtype":{"id":10}},"title":"Differences in Ichthyophonus prevalence and infection severity between upper Yukon River and Tanana River chinook salmon, Oncorhynchus tshawytscha (Walbaum), stocks","docAbstract":"Two genetically distinct populations of chinook salmon, Oncorhynchus tshawytscha (Walbaum), were simultaneously sampled at the confluence of the Yukon and Tanana rivers in 2003. Upper Yukon-Canadian fish had significantly higher infection prevalence as well as more severe infections (higher parasite density in heart tissue) than the lower Yukon-Tanana River fish. Both populations had migrated the same distance from the mouth of the Yukon River at the time of sampling but had significantly different distances remaining to swim before reaching their respective spawning grounds. Multiple working hypotheses are proposed to explain the differences between the two stocks: (1) the two genetically distinct populations have different inherent resistance to infection, (2) genetically influenced differences in feeding behaviour resulted in temporal and/or spatial differences in exposure, (3) physiological differences resulting from different degrees of sexual maturity influenced the course of disease, and (4) the most severely infected Tanana River fish either died en route or fatigued and were unable to complete their migration to the Tanana River, thus leaving a population of apparently healthier fish. ?? 2006 Blackwell Publishing Ltd.
","language":"English","publisher":"Wiley","doi":"10.1111/j.1365-2761.2006.00743.x","issn":"01407775","usgsCitation":"Kocan, R., and Hershberger, P., 2006, Differences in Ichthyophonus prevalence and infection severity between upper Yukon River and Tanana River chinook salmon, Oncorhynchus tshawytscha (Walbaum), stocks: Journal of Fish Diseases, v. 29, no. 8, p. 497-503, https://doi.org/10.1111/j.1365-2761.2006.00743.x.","productDescription":"7 p.","startPage":"497","endPage":"503","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":654,"text":"Western Fisheries Research Center","active":true,"usgs":true}],"links":[{"id":236952,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":210126,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1365-2761.2006.00743.x"}],"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 -152.90771484375,\n 65.34393102126091\n ],\n [\n -152.94067382812497,\n 64.98865082457425\n ],\n [\n -151.292724609375,\n 64.6967577159076\n ],\n [\n -150.325927734375,\n 65.33247059890721\n ],\n [\n -150.3973388671875,\n 65.6242898435409\n ],\n [\n -152.8143310546875,\n 65.33934745143243\n ],\n [\n -152.90771484375,\n 65.34393102126091\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"29","issue":"8","noUsgsAuthors":false,"publicationDate":"2006-08-02","publicationStatus":"PW","scienceBaseUri":"505a00ebe4b0c8380cd4f9bc","contributors":{"authors":[{"text":"Kocan, R.","contributorId":95665,"corporation":false,"usgs":true,"family":"Kocan","given":"R.","affiliations":[],"preferred":false,"id":417094,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hershberger, P.","contributorId":64826,"corporation":false,"usgs":true,"family":"Hershberger","given":"P.","email":"","affiliations":[],"preferred":false,"id":417093,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70028230,"text":"70028230 - 2006 - Simulating the influences of various fire regimes on caribou winter habitat","interactions":[],"lastModifiedDate":"2018-04-04T10:32:03","indexId":"70028230","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1450,"text":"Ecological Applications","active":true,"publicationSubtype":{"id":10}},"title":"Simulating the influences of various fire regimes on caribou winter habitat","docAbstract":"Caribou are an integral component of high‐latitude ecosystems and represent a major subsistence food source for many northern people. The availability and quality of winter habitat is critical to sustain these caribou populations. Caribou commonly use older spruce woodlands with adequate terrestrial lichen, a preferred winter forage, in the understory. Changes in climate and fire regime pose a significant threat to the long‐term sustainability of this important winter habitat. Computer simulations performed with a spatially explicit vegetation succession model (ALFRESCO) indicate that changes in the frequency and extent of fire in interior Alaska may substantially impact the abundance and quality of winter habitat for caribou. We modeled four different fire scenarios and tracked the frequency, extent, and spatial distribution of the simulated fires and associated changes to vegetation composition and distribution. Our results suggest that shorter fire frequencies (i.e., less time between recurring fires) on the winter range of the Nelchina caribou herd in eastern interior Alaska will result in large decreases of available winter habitat, relative to that currently available, in both the short and long term. A 30% shortening of the fire frequency resulted in a 3.5‐fold increase in the area burned annually and an associated 41% decrease in the amount of spruce–lichen forest found on the landscape. More importantly, simulations with more frequent fires produced a relatively immature forest age structure, compared to that which currently exists, with few stands older than 100 years. This age structure is at the lower limits of stand age classes preferred by caribou from the Nelchina herd. Projected changes in fire regime due to climate warming and/or additional prescribed burning could substantially alter the winter habitat of caribou in interior Alaska and lead to changes in winter range use and/or population dynamics.
","language":"English","publisher":"Ecological Society of America","doi":"10.1890/1051-0761(2006)016[1730:STIOVF]2.0.CO;2","usgsCitation":"Rupp, T., Olson, M., Adams, L., Dale, B.W., Joly, K., Henkelman, J., Collins, W.B., and Starfield, A.M., 2006, Simulating the influences of various fire regimes on caribou winter habitat: Ecological Applications, v. 16, no. 5, p. 1730-1743, https://doi.org/10.1890/1051-0761(2006)016[1730:STIOVF]2.0.CO;2.","productDescription":"14 p.","startPage":"1730","endPage":"1743","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":477373,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1890/1051-0761(2006)016[1730:stiovf]2.0.co;2","text":"Publisher Index Page"},{"id":237164,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8fdbe4b08c986b31919d","contributors":{"authors":[{"text":"Rupp, T. 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Changes in trait expression can be accounted for by differences in the quality of the environment (‘environmental constraint’ hypothesis) or by strategic adjustments, if the relative contribution of the trait to fitness varies with time (‘strategic allocation’ hypothesis). In birds, egg production is lower in replacement clutches than in first clutches, but it is unknown whether this reduction results from an environmental constraint (e.g. food being less available at the time when the replacement clutch is produced) or from a strategic allocation of resources between the two breeding attempts. To distinguish between these two hypotheses, we performed an experiment with black-legged kittiwakes (Rissa tridactyla). Pairs were either food-supplemented or not before the first clutch was laid onwards and we induced them to produce a replacement clutch by removing eggs once when the first clutch was complete. As predicted by the ‘strategic allocation’ hypothesis, egg production of food-supplemented and non-food-supplemented birds decreased between first and replacement clutches. This suggests that kittiwakes strategically reduce investment in egg production for their replacement clutches compared to first clutches.
","language":"English","publisher":"The Royal Society","doi":"10.1098/rspb.2005.3457","usgsCitation":"Gasparini, J., Roulin, A., Gill, V., Hatch, S.A., and Boulinier, T., 2006, Kittiwakes strategically reduce investment in replacement clutches: Proceedings of the Royal Society B: Biological Sciences, v. 273, no. 1593, p. 1551-1554, https://doi.org/10.1098/rspb.2005.3457.","productDescription":"4 p.","startPage":"1551","endPage":"1554","numberOfPages":"4","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"links":[{"id":477595,"rank":1,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://iris.unil.ch/handle/iris/109068","text":"External Repository"},{"id":237234,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"273","issue":"1593","noUsgsAuthors":false,"publicationDate":"2006-03-14","publicationStatus":"PW","scienceBaseUri":"505a40b5e4b0c8380cd64fa2","contributors":{"authors":[{"text":"Gasparini, J.","contributorId":75745,"corporation":false,"usgs":true,"family":"Gasparini","given":"J.","email":"","affiliations":[],"preferred":false,"id":417164,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Roulin, A.","contributorId":54009,"corporation":false,"usgs":true,"family":"Roulin","given":"A.","email":"","affiliations":[],"preferred":false,"id":417162,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gill, V.A.","contributorId":35498,"corporation":false,"usgs":true,"family":"Gill","given":"V.A.","email":"","affiliations":[],"preferred":false,"id":417160,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hatch, Scott A. 0000-0002-0064-8187 shatch@usgs.gov","orcid":"https://orcid.org/0000-0002-0064-8187","contributorId":2625,"corporation":false,"usgs":true,"family":"Hatch","given":"Scott","email":"shatch@usgs.gov","middleInitial":"A.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":417163,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Boulinier, T.","contributorId":37845,"corporation":false,"usgs":true,"family":"Boulinier","given":"T.","email":"","affiliations":[],"preferred":false,"id":417161,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70028243,"text":"70028243 - 2006 - New insights into Arctic paleogeography and tectonics from U-Pb detrital zircon geochronology","interactions":[],"lastModifiedDate":"2018-05-29T16:34:08","indexId":"70028243","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3524,"text":"Tectonics","active":true,"publicationSubtype":{"id":10}},"title":"New insights into Arctic paleogeography and tectonics from U-Pb detrital zircon geochronology","docAbstract":"To test existing models for the formation of the Amerasian Basin, detrital zircon suites from 12 samples of Triassic sandstone from the circum-Arctic region were dated by laser ablation-inductively coupled plasma-mass spectrometry (ICP-MS). The northern Verkhoyansk (NE Russia) has Permo-Carboniferous (265-320 Ma) and Cambro-Silurian (410-505 Ma) zircon populations derived via river systems from the active Baikal Mountain region along the southern Siberian craton. Chukotka, Wrangel Island (Russia), and the Lisburne Hills (western Alaska) also have Permo-Carboniferous (280-330 Ma) and late Precambrian-Silurian (420-580 Ma) zircons in addition to Permo-Triassic (235-265 Ma), Devonian (340-390 Ma), and late Precambrian (1000-1300 Ma) zircons. These ages suggest at least partial derivation from the Taimyr, Siberian Trap, and/ or east Urals regions of Arctic Russia. The northerly derived Ivishak Formation (Sadlerochit Mountains, Alaska) and Pat Bay Formation (Sverdrup Basin, Canada) are dominated by Cambrian-latest Precambrian (500-600 Ma) and 445-490 Ma zircons. Permo-Carboniferous and Permo-Triassic zircons are absent. The Bjorne Formation (Sverdrup Basin), derived from the south, differs from other samples studied with mostly 1130-1240 Ma and older Precambrian zircons in addition to 430-470 Ma zircons. The most popular tectonic model for the origin of the Amerasian Basin involves counterclockwise rotation of the Arctic Alaska-Chukotka microplate away from the Canadian Arctic margin. The detrital zircon data suggest that the Chukotka part of the microplate originated closer to the Taimyr and Verkhoyansk, east of the Polar Urals of Russia, and not from the Canadian Arctic. Copyright 2006 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Tectonics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2005TC001830","issn":"02787407","usgsCitation":"Miller, E.L., Toro, J., Gehrels, G., Amato, J., Prokopiev, A., Tuchkova, M., Akinin, V., Dumitru, T., Moore, T., and Cecile, M., 2006, New insights into Arctic paleogeography and tectonics from U-Pb detrital zircon geochronology: Tectonics, v. 25, no. 3, https://doi.org/10.1029/2005TC001830.","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":477546,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2005tc001830","text":"Publisher Index Page"},{"id":236813,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":210021,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2005TC001830"}],"volume":"25","issue":"3","noUsgsAuthors":false,"publicationDate":"2006-06-06","publicationStatus":"PW","scienceBaseUri":"505a65d9e4b0c8380cd72c65","contributors":{"authors":[{"text":"Miller, E. L.","contributorId":75583,"corporation":false,"usgs":true,"family":"Miller","given":"E.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":417200,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Toro, J.","contributorId":88502,"corporation":false,"usgs":true,"family":"Toro","given":"J.","email":"","affiliations":[],"preferred":false,"id":417205,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gehrels, G.","contributorId":81685,"corporation":false,"usgs":true,"family":"Gehrels","given":"G.","affiliations":[],"preferred":false,"id":417202,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Amato, J.M.","contributorId":63214,"corporation":false,"usgs":true,"family":"Amato","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":417199,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Prokopiev, A.","contributorId":14182,"corporation":false,"usgs":true,"family":"Prokopiev","given":"A.","email":"","affiliations":[],"preferred":false,"id":417196,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Tuchkova, M.I.","contributorId":75744,"corporation":false,"usgs":true,"family":"Tuchkova","given":"M.I.","email":"","affiliations":[],"preferred":false,"id":417201,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Akinin, V.V.","contributorId":49583,"corporation":false,"usgs":true,"family":"Akinin","given":"V.V.","affiliations":[],"preferred":false,"id":417198,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Dumitru, T.A.","contributorId":24973,"corporation":false,"usgs":true,"family":"Dumitru","given":"T.A.","affiliations":[],"preferred":false,"id":417197,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Moore, Thomas E. 0000-0002-0878-0457","orcid":"https://orcid.org/0000-0002-0878-0457","contributorId":85592,"corporation":false,"usgs":true,"family":"Moore","given":"Thomas E.","affiliations":[],"preferred":false,"id":417204,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Cecile, M.P.","contributorId":83324,"corporation":false,"usgs":true,"family":"Cecile","given":"M.P.","email":"","affiliations":[],"preferred":false,"id":417203,"contributorType":{"id":1,"text":"Authors"},"rank":10}]}} ,{"id":70028278,"text":"70028278 - 2006 - A 16-year time series of 1 km AVHRR satellite data of the conterminous United States and Alaska","interactions":[],"lastModifiedDate":"2017-04-11T09:55:16","indexId":"70028278","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3052,"text":"Photogrammetric Engineering and Remote Sensing","active":true,"publicationSubtype":{"id":10}},"title":"A 16-year time series of 1 km AVHRR satellite data of the conterminous United States and Alaska","docAbstract":"The U.S. Geological Survey (USGS) has developed a 16-year time series of vegetation condition information for the conterminous United States and Alaska using 1 km Advanced Very High Resolution Radiometer (AVHRR) data. The AVHRR data have been processed using consistent methods that account for radiometric variability due to calibration uncertainty, the effects of the atmosphere on surface radiometric measurements obtained from wide field-of-view observations, and the geometric registration accuracy. The conterminous United States and Alaska data sets have an atmospheric correction for water vapor, ozone, and Rayleigh scattering and include a cloud mask derived using the Clouds from AVHRR (CLAVR) algorithm. In comparison with other AVHRR time series data sets, the conterminous United States and Alaska data are processed using similar techniques. The primary difference is that the conterminous United States and Alaska data are at 1 km resolution, while others are at 8 km resolution. The time series consists of weekly and biweekly maximum normalized difference vegetation index (NDVI) composites.
","language":"English","publisher":"Ingenta","doi":"10.14358/PERS.72.9.1027","issn":"00991112","usgsCitation":"Eidenshink, J., 2006, A 16-year time series of 1 km AVHRR satellite data of the conterminous United States and Alaska: Photogrammetric Engineering and Remote Sensing, v. 72, no. 9, p. 1027-1035, https://doi.org/10.14358/PERS.72.9.1027.","productDescription":"9 p.","startPage":"1027","endPage":"1035","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":477448,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.14358/pers.72.9.1027","text":"Publisher Index Page"},{"id":236816,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"72","issue":"9","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"55c9cb2ee4b08400b1fdb6dd","contributors":{"authors":[{"text":"Eidenshink, Jeff","contributorId":95156,"corporation":false,"usgs":true,"family":"Eidenshink","given":"Jeff","affiliations":[],"preferred":false,"id":417366,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70028969,"text":"70028969 - 2006 - Large-scale movements and habitat characteristics of king eiders throughout the nonbreeding period","interactions":[],"lastModifiedDate":"2012-03-12T17:20:58","indexId":"70028969","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1318,"text":"Condor","active":true,"publicationSubtype":{"id":10}},"title":"Large-scale movements and habitat characteristics of king eiders throughout the nonbreeding period","docAbstract":"King Eiders (Somateria spectabilis) breeding in western Canada and Alaska molt wing feathers and spend the winter in remote areas of the Bering Sea, precluding direct observation. To characterize timing of migration and habitat used by King Eiders during the nonbreeding period, we collected location data for 60 individuals (27 females and 33 males) over three years from satellite telemetry and utilized oceanographic information obtained by remote sensing. Male King Eiders dispersed from breeding areas, arrived at wing molt sites, and dispersed from wing molt sites earlier than females in all years. Males arriving earlier at wing molt sites molted flight feathers at higher latitudes. Distributions of molt and winter locations did not differ by sex or among years. Of the variables considered for analysis, distance to shore, water depth, and salinity appeared to best describe King Eider habitat throughout the nonbreeding period. King Eiders were located closer to shore, in shallower water with lower salinity than random locations. During the winter, lower ice concentrations were also associated with King Eider locations. This study provides some of the first large-scale descriptions of King Eider migration and habitat outside the breeding season. ?? The Cooper Ornithological Society 2006.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Condor","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1650/0010-5422(2006)108[887:LMAHCO]2.0.CO;2","issn":"00105422","usgsCitation":"Phillips, L.M., Powell, A., and Rexstad, E., 2006, Large-scale movements and habitat characteristics of king eiders throughout the nonbreeding period: Condor, v. 108, no. 4, p. 887-900, https://doi.org/10.1650/0010-5422(2006)108[887:LMAHCO]2.0.CO;2.","startPage":"887","endPage":"900","numberOfPages":"14","costCenters":[],"links":[{"id":209807,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1650/0010-5422(2006)108[887:LMAHCO]2.0.CO;2"},{"id":236528,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"108","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a449ce4b0c8380cd66c52","contributors":{"authors":[{"text":"Phillips, Laura M.","contributorId":49497,"corporation":false,"usgs":false,"family":"Phillips","given":"Laura","email":"","middleInitial":"M.","affiliations":[{"id":7211,"text":"University of Alaska, Fairbanks","active":true,"usgs":false}],"preferred":false,"id":420781,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Powell, A.N.","contributorId":66194,"corporation":false,"usgs":true,"family":"Powell","given":"A.N.","email":"","affiliations":[],"preferred":false,"id":420782,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rexstad, E.A.","contributorId":47063,"corporation":false,"usgs":true,"family":"Rexstad","given":"E.A.","email":"","affiliations":[],"preferred":false,"id":420780,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70028948,"text":"70028948 - 2006 - An isotopic assessment of protein from diet and endogenous stores: Effects on egg production and incubation behaviour of geese","interactions":[],"lastModifiedDate":"2018-08-19T20:07:00","indexId":"70028948","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":900,"text":"Ardea","active":true,"publicationSubtype":{"id":10}},"title":"An isotopic assessment of protein from diet and endogenous stores: Effects on egg production and incubation behaviour of geese","docAbstract":"Little empirical information exists to assess to what degree geese use a capital versus income breeding strategy for investing nutrients into eggs. We used stable isotope methods to directly estimate the sources of protein deposited into egg yolks of Brent Branta bernicla and Emperor Geese Anser canagicus on the Yukon-Kuskokwim Delta, Alaska, USA. Approximately 59 and 45% of protein in egg yolks of Brent and Emperor Geese, respectively, was derived from exogenous sources (i.e. food plants on the local breeding area). Within clutches of Brent Goose eggs, first-laid eggs exhibited slightly higher contributions from endogenous reserves than last-laid eggs. This pattern was less clear for Emperor Geese, which may have been a consequence of possibly analyzing eggs that were laid by intraspecific nest parasites rather than by hosts. For both these species, individuals exhibited large variability in the percent contribution of exogenous versus endogenous stores to eggs, and future studies should identify ecological factors related to this variation. Those Emperor Geese in poor body condition incubated their nests less constantly, and based on δ13C values, they fed on terrestrial foods while off their nests. Although not a pure capital breeder, Emperor Geese used nutrients garnered on spring staging areas to fuel virtually all their own maintenance during incubation and to contribute half or more of the nutrients in eggs. These results highlight the ecological importance of these spring staging habitats to geese.
","language":"English","publisher":"Netherlands Ornithologists' Union","issn":"03732266","usgsCitation":"Schmutz, J.A., Hobson, K., and Morse, J., 2006, An isotopic assessment of protein from diet and endogenous stores: Effects on egg production and incubation behaviour of geese: Ardea, v. 94, no. 3, p. 385-397.","productDescription":"13 p.","startPage":"385","endPage":"397","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":236454,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":334953,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://ardea.nou.nu/ardea_search3.php?key=nummer&keyin=94&k2=3"}],"country":"United States","state":"Alaska","otherGeospatial":"Yukon-Kuskokwim Delta","volume":"94","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ea94e4b0c8380cd48962","contributors":{"authors":[{"text":"Schmutz, Joel A. 0000-0002-6516-0836 jschmutz@usgs.gov","orcid":"https://orcid.org/0000-0002-6516-0836","contributorId":1805,"corporation":false,"usgs":true,"family":"Schmutz","given":"Joel","email":"jschmutz@usgs.gov","middleInitial":"A.","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":420680,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hobson, K.A.","contributorId":23248,"corporation":false,"usgs":true,"family":"Hobson","given":"K.A.","email":"","affiliations":[],"preferred":false,"id":420681,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Morse, J.A.","contributorId":73771,"corporation":false,"usgs":true,"family":"Morse","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":420682,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70028946,"text":"70028946 - 2006 - Interspecific resource partitioning in sympatric ursids","interactions":[],"lastModifiedDate":"2018-03-29T11:13:10","indexId":"70028946","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1450,"text":"Ecological Applications","active":true,"publicationSubtype":{"id":10}},"title":"Interspecific resource partitioning in sympatric ursids","docAbstract":"The fundamental niche of a species is rarely if ever realized because the presence of other species restricts it to a narrower range of ecological conditions. The effects of this narrower range of conditions define how resources are partitioned. Resource partitioning has been inferred but not demonstrated previously for sympatric ursids. We estimated assimilated diet in relation to body condition (body fat and lean and total body mass) and reproduction for sympatric brown bears (Ursus arctos) and American black bears (U. americanus) in south‐central Alaska, 1998–2000. Based on isotopic analysis of blood and keratin in claws, salmon (Oncorhynchus spp.) predominated in brown bear diets (>53% annually) whereas black bears assimilated 0–25% salmon annually. Black bears did not exploit salmon during a year with below average spawning numbers, probably because brown bears deterred black bear access to salmon. Proportion of salmon in assimilated diet was consistent across years for brown bears and represented the major portion of their diet. Body size of brown bears in the study area approached mean body size of several coastal brown bear populations, demonstrating the importance of salmon availability to body condition. Black bears occurred at a comparable density (mass : mass), but body condition varied and was related directly to the amount of salmon assimilated in their diet. Both species gained most lean body mass during spring and all body fat during summer when salmon were present. Improved body condition (i.e., increased percentage body fat) from salmon consumption reduced catabolism of lean body mass during hibernation, resulting in better body condition the following spring. Further, black bear reproduction was directly related to body condition; reproductive rates were reduced when body condition was lower. High body fat content across years for brown bears was reflected in consistently high reproductive levels. We suggest that the fundamental niche of black bears was constrained by brown bears through partitioning of food resources, which varied among years. Reduced exploitation of salmon caused black bears to rely more extensively on less reliable or nutritious food sources (e.g., moose [Alces alces], berries) resulting in lowered body condition and subsequent reproduction.
","language":"English","publisher":"Ecological Society of America","doi":"10.1890/1051-0761(2006)016[2333:IRPISU]2.0.CO;2","usgsCitation":"Belant, J.L., Kielland, K., Follmann, E., and Adams, L., 2006, Interspecific resource partitioning in sympatric ursids: Ecological Applications, v. 16, no. 6, p. 2333-2343, https://doi.org/10.1890/1051-0761(2006)016[2333:IRPISU]2.0.CO;2.","productDescription":"11 p.","startPage":"2333","endPage":"2343","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":236420,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3dafe4b0c8380cd63766","contributors":{"authors":[{"text":"Belant, Jerrold L.","contributorId":108394,"corporation":false,"usgs":false,"family":"Belant","given":"Jerrold","email":"","middleInitial":"L.","affiliations":[{"id":35599,"text":"Carnivore Ecology Laboratory, Mississippi State University, Mississippi State, MS","active":true,"usgs":false}],"preferred":false,"id":420675,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kielland, Knut","contributorId":189214,"corporation":false,"usgs":false,"family":"Kielland","given":"Knut","email":"","affiliations":[],"preferred":false,"id":420674,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Follmann, Erich H.","contributorId":75049,"corporation":false,"usgs":true,"family":"Follmann","given":"Erich H.","affiliations":[],"preferred":false,"id":420672,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"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":420673,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70028917,"text":"70028917 - 2006 - Evaluation of aerial survey methods for Dall's sheep","interactions":[],"lastModifiedDate":"2017-03-22T08:10:05","indexId":"70028917","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3779,"text":"Wildlife Society Bulletin","onlineIssn":"1938-5463","printIssn":"0091-7648","active":true,"publicationSubtype":{"id":10}},"title":"Evaluation of aerial survey methods for Dall's sheep","docAbstract":"Most Dall's sheep (Ovis dalli dalli) population-monitoring efforts use intensive aerial surveys with no attempt to estimate variance or adjust for potential sightability bias. We used radiocollared sheep to assess factors that could affect sightability of Dall's sheep in standard fixed-wing and helicopter surveys and to evaluate feasibility of methods that might account for sightability bias. Work was conducted in conjunction with annual aerial surveys of Dall's sheep in the western Baird Mountains, Alaska, USA, in 2000–2003. Overall sightability was relatively high compared with other aerial wildlife surveys, with 88% of the available, marked sheep detected in our fixed-wing surveys. Total counts from helicopter surveys were not consistently larger than counts from fixed-wing surveys of the same units, and detection probabilities did not differ for the 2 aircraft types. Our results suggest that total counts from helicopter surveys cannot be used to obtain reliable estimates of detection probabilities for fixed-wing surveys. Groups containing radiocollared sheep often changed in size and composition before they could be observed by a second crew in units that were double-surveyed. Double-observer methods that require determination of which groups were detected by each observer will be infeasible unless survey procedures can be modified so that groups remain more stable between observations. Mean group sizes increased during our study period, and our logistic regression sightability model indicated that detection probabilities increased with group size. Mark–resight estimates of annual population sizes were similar to sightability-model estimates, and confidence intervals overlapped broadly. We recommend the sightability-model approach as the most effective and feasible of the alternatives we considered for monitoring Dall's sheep populations.
","language":"English","publisher":"Wiley","doi":"10.2193/0091-7648(2006)34[732:EOASMF]2.0.CO;2","issn":"00917648","usgsCitation":"Udevitz, M.S., Shults, B.S., Adams, L., and Kleckner, C., 2006, Evaluation of aerial survey methods for Dall's sheep: Wildlife Society Bulletin, v. 34, no. 3, p. 732-740, https://doi.org/10.2193/0091-7648(2006)34[732:EOASMF]2.0.CO;2.","productDescription":"9 p.","startPage":"732","endPage":"740","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":236414,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Baird Mountains","volume":"34","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0c3be4b0c8380cd52aba","contributors":{"authors":[{"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":420546,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Shults, Brad S.","contributorId":46413,"corporation":false,"usgs":true,"family":"Shults","given":"Brad","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":420548,"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":420547,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kleckner, Christopher","contributorId":179099,"corporation":false,"usgs":true,"family":"Kleckner","given":"Christopher","email":"","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":false,"id":420545,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70028905,"text":"70028905 - 2006 - Testing the junk-food hypothesis on marine birds: Effects of prey type on growth and development","interactions":[],"lastModifiedDate":"2017-11-18T09:34:13","indexId":"70028905","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3731,"text":"Waterbirds","onlineIssn":"19385390","printIssn":"15244695","active":true,"publicationSubtype":{"id":10}},"title":"Testing the junk-food hypothesis on marine birds: Effects of prey type on growth and development","docAbstract":"The junk-food hypothesis attributes declines in productivity of marine birds and mammals to changes in the species of prey they consume and corresponding differences in nutritional quality of those prey. To test this hypothesis nestling Black-legged Kittiwakes (Rissa tridactyla) and Tufted Puffins (Fratercula cirrhata) were raised in captivity under controlled conditions to determine whether the type and quality of fish consumed by young seabirds constrains their growth and development. Some nestlings were fed rations of Capelin (Mallotus villosus), Herring (Clupea pallasi) or Sand Lance (Ammodytes hexapterus) and their growth was compared with nestlings raised on equal biomass rations of Walleye Pollock (Theragra chalcograma). Nestlings fed rations of herring, sand lance, or capelin experienced higher growth increments than nestlings fed pollock. The energy density of forage fish fed to nestlings had a marked effect on growth increments and could be expected to have an effect on pre- and post-fledging survival of nestlings in the wild. These results provide empirical support for the junk-food hypothesis.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Waterbirds","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1675/1524-4695(2006)29[407:TTJHOM]2.0.CO;2","issn":"15244695","usgsCitation":"Romano, M.D., Piatt, J.F., and Roby, D., 2006, Testing the junk-food hypothesis on marine birds: Effects of prey type on growth and development: Waterbirds, v. 29, no. 4, p. 407-414, https://doi.org/10.1675/1524-4695(2006)29[407:TTJHOM]2.0.CO;2.","productDescription":"8 p.","startPage":"407","endPage":"414","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":209616,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1675/1524-4695(2006)29[407:TTJHOM]2.0.CO;2"},{"id":236271,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"29","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba5d5e4b08c986b320cf7","contributors":{"authors":[{"text":"Romano, Marc D.","contributorId":73528,"corporation":false,"usgs":true,"family":"Romano","given":"Marc","email":"","middleInitial":"D.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":false,"id":420496,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Piatt, John F. 0000-0002-4417-5748 jpiatt@usgs.gov","orcid":"https://orcid.org/0000-0002-4417-5748","contributorId":3025,"corporation":false,"usgs":true,"family":"Piatt","given":"John","email":"jpiatt@usgs.gov","middleInitial":"F.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true},{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":420497,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Roby, D.D. 0000-0001-9844-0992","orcid":"https://orcid.org/0000-0001-9844-0992","contributorId":70944,"corporation":false,"usgs":true,"family":"Roby","given":"D.D.","affiliations":[],"preferred":false,"id":420495,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70028282,"text":"70028282 - 2006 - A landscape-scale model of yellow-billed loon (Gavia adamsii) habitat preferences in northern alaska","interactions":[],"lastModifiedDate":"2018-03-29T15:03:57","indexId":"70028282","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"title":"A landscape-scale model of yellow-billed loon (Gavia adamsii) habitat preferences in northern alaska","docAbstract":"We modeled yellow-billed loon (Gavia adamsii) habitat preferences in a 23,500 km2 area of northern Alaska using intensive aerial surveys and landscape-scale habitat descriptors. Of the 757 lakes censused, yellow-billed loons occupied 15% and Pacific loons (G. pacifica) 42%. Lake area, depth, proportion of shoreline in aquatic vegetation, shoreline complexity, hydrological connectivity (stream present within 100 m or absent), and an area–connectivity interaction were positive, significant predictors of yellow-billed loon presence in a multivariate logistic regression model, but distance to nearest river or Beaufort Sea coast were not. Predicted yellow-billed loon presence was 13 and 4.7 times more likely on deep and medium lakes, respectively, than on shallow lakes that freeze to the bottom. On small lakes (<60 ha), predicted yellow-billed loon presence was 4.8–1.7 times more likely on lakes with hydrological connectivity than without, but connectivity was not important at most lake sizes (65–750 ha). Yellow-billed loon broods depend on fish available in the brood-rearing lake, and we suggest that a dependable supply of fish is more likely in larger lakes, those deep enough to have open water under winter ice, and those near streams. Highly convoluted shorelines and those with aquatic vegetation provide loon nesting and brood-rearing sites, as well as fish habitat. Pacific loon absence was a significant, positive predictor when added to the habitat model, indicating that yellow-billed loons were four times more likely on lakes without Pacific loons.
","language":"English","publisher":"Springer","doi":"10.1007/s10750-006-0042-2","issn":"00188158","usgsCitation":"Earnst, S.L., Platte, R., and Bond, L., 2006, A landscape-scale model of yellow-billed loon (Gavia adamsii) habitat preferences in northern alaska: Hydrobiologia, v. 567, no. 1, p. 227-236, https://doi.org/10.1007/s10750-006-0042-2.","productDescription":"10 p.","startPage":"227","endPage":"236","numberOfPages":"10","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":236885,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":210075,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10750-006-0042-2"}],"volume":"567","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e432e4b0c8380cd464b4","contributors":{"authors":[{"text":"Earnst, Susan L. susan_earnst@usgs.gov","contributorId":4446,"corporation":false,"usgs":true,"family":"Earnst","given":"Susan","email":"susan_earnst@usgs.gov","middleInitial":"L.","affiliations":[{"id":289,"text":"Forest and Rangeland Ecosys Science Center","active":true,"usgs":true}],"preferred":true,"id":417382,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Platte, Robert","contributorId":105680,"corporation":false,"usgs":true,"family":"Platte","given":"Robert","affiliations":[],"preferred":false,"id":417384,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bond, Laura","contributorId":89103,"corporation":false,"usgs":true,"family":"Bond","given":"Laura","affiliations":[],"preferred":false,"id":417383,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ]}