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Location Folder Show Tree ROOT _ScienceBase Catalog 3DSC Alaska Science Center (ASC) Alkalic Igneous Centers of the Great Plains and Rocky Mountains: Data in Support of Critical Mineral Resource Studies AMMonitor: Remote wildlife monitoring for adaptive management Amphibian Research and Monitoring Initiative More... Filters Date Range Past year (65) Past month (22) Past week (14) Past day (5) Custom range... To   Search Extensions ArcGIS Service Definition (1) Community (1) Shapefile (1) Types Citation (4) Map Service (3) OGC WFS Layer (3) OGC WMS Layer (3) OGC WMS Service (2) More... Contacts U.S. Geological Survey USGS ScienceBase Team Alaska Science Center Ecosystems U.S. Geological Survey - ScienceBase More... Categories Data (53) Data Release - Revised (5) Image (1) Tag Types Theme (78) Place (77) USGS Scientific Topic Keyword (21) Harvest Set (22) theme (1) place (1) ISO 19115 Topic Category (1) More... Tag Schemes USGS Thesaurus (73) None (64) NASA GCMD Earth Science Keyword Thesaurus (59) USGS Geographic Names Information System (GNIS) (58) USGS CSA Biocomplexity Thesaurus (48) ISO 19115 Topic Category (76) Geographic Names Information System (14) More... View Results as: JSON ATOM CSV Browse Folder

Estimated Post-Emergence Period for Denning Polar Bears of the Chukchi and Beaufort Seas These data are estimates of den emergence date, den site departure dates, and duration at den sites as well as post-emergence observations for female polar bears sampled in the southern Beaufort Sea subpopulation 1985-2016 and the Chukchi Sea subpopulation 2008-2017. The data were used to better understand the importance of time spent at the den site post-emergence. Emergence dates and departure dates were determined using collar temperature sensor data. Tags: Alaska, Animals/Vertebrates, Bears, Beaufort Sea, Behavior, All tags... Biota, Carnivores, Chukchi Sea, Coastal ecosystems, Dens, Environment, Mammals, Marine ecosystems, Marine mammals, Phenology, Polar Bear, Species life history, Threatened species, USGS:ASC591, Ursus maritimus, Wildlife, Fewer tags Measurement Data of Polar Bears Captured in the Chukchi and Southern Beaufort Seas, 1981-2017 This dataset includes measures collected on polar bears captured in the Chukchi and Beaufort Seas, 1981-2017 by the U.S. Geological Survey and U.S. Fish and Wildlife Service. Data collected include body length, body mass, axillary girth, skull width and tail lengths. Bears were also aged as described in the methods. For some bears, an adipose tissue sample was collected and percent lipid content was measured, percent body fat was measured via bioelectrical impedance analysis, and/or recent feeding behavior was assessed via gut palpitation or blood urea and creatinine levels, all of which are further described in the methods. Tags: Alaska, Animal behavior, Animals/Vertebrates, Bears, Beaufort Sea, All tags... Biota, Carnivores, Chukchi Sea, Coastal ecosystems, Consumer Behavior, Environment, Mammals, Marine ecosystems, Marine mammals, Species Life History, Threatened Species, USGS:ASC287, Wildlife, Fewer tags Kuskokwim Bay chum salmon (Oncorhynchus keta) energy density, distribution, and stomach data, 2004 This data set documents the dry mass energy density, distribution, and stomach contents of age-0 chum salmon (Oncorhynchus keta) captured in the Kuskokwim Bay estuary in May and June 2004. The analysis of this data was published in Burrill et al. 2018 (DOI :10.1007/s00300-018-2297-2.). Categories: Data; Tags: Alaska, Bering Sea, Kuskokwim Bay, anadromous fish, biota, All tags... coastal zone, estuarine ecosystems, food web, migratory species, ontogeny, stomach contents, Fewer tags Overview of Sampled Lakes, Yukon Flats National Wildlife Refuge This dataset is a single comma-delimited text file (.csv). Data include the name of lakes where sampling occurred, approximate geographic coordinates of each lake, historical dynamics of the lake, and indication of measurements taken at the lake. Categories: Data; Tags: Alaska, Biogeochemical cycles, Biomass, Biomass dynamics, Biota, All tags... Community ecology, Environment, Landscape ecology, Primary production, Yukon Flats, Yukon Flats National Wildlife Refuge, Fewer tags Aboveground Net Primary Production Estimates from the Yukon Flats National Wildlife Refuge This dataset is a single comma-delimited text file (.csv). Data include the name of lakes where samples were obtained, the historical dynamics of that lake, the sampled community type, and the dry mass of annual new growth. Shrub community measurements are a combination of understory mass from quadrat harvests and shrub stem mass derived from published allometric equations. Categories: Data; Tags: Alaska, Biogeochemical cycles, Biomass, Biomass dynamics, Biota, All tags... Community ecology, Environment, Landscape ecology, Primary production, Terrestrial ecosystems, Wetland ecosystems, Yukon Flats, Yukon Flats National Wildlife Refuge, Fewer tags Soil Properties of Lake-Margin Wetlands of the Yukon Flats National Wildlife Refuge This dataset is a single comma-delimited text file (.csv). Data include the name of lakes where samples were obtained, soil pH, electrical conductivity (EC), water content (VWC), and bulk density (BD) of soil core samples within organic soil horizon in lake-margin wetland plant communities. Categories: Data; Tags: Alaska, Biogeochemical cycles, Biota, Environment, Lake drying, All tags... Landscape ecology, Nutrient cycling, Terrestrial ecosystems, Wetland ecosystems, Yukon Flats, Yukon Flats National Wildlife Refuge, Fewer tags Population Plots at Two Seabird Colonies in Lower Cook Inlet, Alaska This dataset consists of one table with annual counts from population plots of Black-legged Kittiwakes and Common Murres at two seabird nesting colonies on Gull and Chisik Islands in lower Cook Inlet, Alaska. Categories: Data; Tags: Alaska, Animals/Vertebrates, Biota, Birds, Black-legged Kittiwakes, All tags... Breeding sites, Coastal ecosystems, Common Murres, Cook Inlet, Environment, Gulf of Alaska, Indicator species, Kachemak Bay, Marine ecosystems, Population dynamics, Rissa tridactyla, Uria aalge, Waders/Gulls/Auks and Allies, Wildlife, Fewer tags Gulf Watch Alaska Nearshore Component: Sea Otter Aerial Survey Data Katmai National Park and Preserve, 2008-2018 These data are part of the Gulf Watch Alaska (GWA) long term monitoring program, nearshore monitoring component. Specifically, these data describe sea otter (Enhydra lutris) aerial survey observations from the waters around Katmai National Park and Preserve from surveys conducted in 2008, 2012, 2015, and 2018. Sea otters are a keystone predator, well known for structuring the nearshore marine ecosystem through their consumption of invertebrate prey. The dataset consists of 3 comma-delimited files (CSV) exported from Microsoft Excel. The data consists of (1) Strip transect counts, (2) Intensive Search Unit (ISU) counts, and (3) Transect coordinates. For each aerial survey, a pilot flew an airplane at an altitude... Categories: Data, Data Release - Revised; Tags: Abundance, Aerial survey, Alaska, Animals/Vertebrates, Aquatic Biology, All tags... Aquatic ecosystems, Benthic habitat, Biota, Coastal habitat, Distribution, Ecology, Ecology, Ecosystem monitoring, Enhydra lutris, Environment, Gulf of Alaska, Intertidal environments, Katmai National Park and Preserve, Marine environment monitoring, Marine mammals, Otters, Population dynamics, Sea otters, USGS Science Data Catalog (SDC), Wildlife Biology, Fewer tags Fish Species Composition and Diet Information in Lakes of the Arctic Coastal Plain, Alaska, 2011-2013 This dataset provides information on fish species composition and their diet information for 16 lakes and 16 ponds at two locations on the central Arctic Coastal Plain, Alaska. In one table, we provide the presence of fish species and the total species count for each lake or pond sampled. This table also includes metrics of surface water connectivity to the stream network. In a second table, stomach content information is provided for fish collected during summer sampling periods (late June to mid-August) over three years (2011–2013). The third table includes stable carbon isotope and stable nitrogen isotope signature data for fish species and snails (the baseline organism) from 16 water bodies at one study location... Categories: Data; Tags: Alaska, Arctic, Arctic Coastal Plain, Diet, Isotopes, All tags... North Slope Borough, Species composition, Species richness, Stomach contents, biota, inlandWaters, isotopic analysis, prey, Fewer tags Eelgrass (Zostera marina) Microsatellite DNA Data; Pacific Coast of North America, 2000-2009 This data set contains genetic information collected from eelgrass (Zostera marina) populations along the Pacific coast of North America from Alaska to Baha California. A total of 447 samples were collected comprising 401 unique individuals (genets) and 46 clones (ramets) from which 10 microsatellite DNA loci were obtained. Categories: Data; Types: Citation; Tags: Angiosperms (Flowering Plants), AquaticEcosystems, Bahia Magdelena, Bahia San Quintin, Biological Classification, All tags... Biosphere, Coastal Habitat, Ecological Dynamics, Estero Punta Banda, Evolutionary Adaptation, Gene Flow, Genetic Diversity, Genetic Structure, Izembek Lagoon, Kinzarof Lagoon, Kuskokwim Shoals, Monocots, Montague Island, Monterey Bay, Nakwasina Bay, Plants, Safety Sound, Saint Catherine Cove, Seagrass, Shallow Bay, Simeonof Island, Species/Population Interactions, Togiak Bay, Unga Island, Wide Bay, Yaquina Bay, biota, Fewer tags Common Murre Disturbance Data on Gull Island, Kachemak Bay, Alaska This dataset consists of one table with predator disturbance information from the Common Murre breeding season (June-August) from 2016-2020 on Gull Island, Kachemak Bay, Alaska. Categories: Data; Tags: Alaska, Animal behavior, Animals/Vertebrates, Bald Eagle, Biota, All tags... Birds, Breeding sites, Breeding success, Coastal ecosystems, Common Murre, Community dynamics, Community ecology, Cook Inlet, Eagles/Falcons/Hawks and Allies, Ecosystem functions, Egg production, Environment, Field inventory and monitoring, Glaucous-winged Gull, Gulf of Alaska, Gull Island, Haliaeetus leucocephalus, Herring Gull, Kachemak Bay, Larus argentatus, Larus glaucescens, Marine ecosystems, Nesting behavior, Reproduction, USGS:ASC586, Uria aalge, Waders/Gulls/Auks and Allies, Fewer tags Pacific Walrus Coastal Haulout Images from Carcass Surveys This data package contains digital images, survey location logs and a summary tabulation from carcass survey conducted at walrus haulouts in Alaska. A summary of image collection times is provided as a tabular file. The images are considered sensitive. They are archived at the U.S. Geological Survey, Alaska Science Center (a USGS Trusted Digital Repository). At this time, only this metadata record describing the data, an image inventory table, and a satellite (GNSS) log are publicly accessible. Tags: Alaska, Animals/vertebrates, Biota, Carnivores, Chukchi Sea, All tags... Coastal ecosystems, Environment, Field inventory and monitoring, Image collections, Kasekaluk Lagoon, Mammals, Marine ecosystems, Marine mammals, Migratory species, Pinniped, Point Lay, Remote photo imagery, Remote sensing, Seals/sea lions/walruses, Seasonal distribution, USGS:ASC600, Wildlife, Fewer tags Carbon and Nitrogen Content of Organic Soils in Lake-Margin Wetlands of the Yukon Flats National Wildlife Refuge This dataset is a single comma-delimited text file (.csv). Data include the name of lakes where samples were obtained, soil core dimensions, bulk density, and carbon/nitrogen content of soil core samples within the organic soil horizon in lake-margin wetland plant communities. Categories: Data; Tags: Alaska, Biogeochemical cycles, Biota, Carbon, Environment, All tags... Lake drying, Landscape ecology, Nitrogen, Nutrient cycling, Soil carbon storage, Terrestrial ecosystems, Wetland ecosystems, Yukon Flats, Yukon Flats National Wildlife Refuge, Fewer tags Seabird Diet Data Collected on Middleton Island, Gulf of Alaska These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program and contain diet data from Black-legged Kittiwakes (BLKI), Rhinoceros Auklets (RHAU), and Tufted puffins (TUPU) located on Middleton Island in Prince William Sound, Gulf of Alaska. The first table consists of information on seabird diet samples including the sampling method and number of prey types identified per sample ("seabirdDiets_foodSample_middletonIsland.csv"). The second table is similar to the first table, however, the samples have been subdivided by individual prey species ("seabirdDiets_samplePrey_middletonIsland.csv"). The third table consists of information specific to sampled prey items, such as prey taxa identification... Tags: Alaska, Animals/Invertebrates, Animals/Vertebrates, Biota, Birds, All tags... Black-legged Kittiwake, Environment, Environmental sustainability, Field sampling, Fish, Fishes, Gulf of Alaska, Marine biology, Marine environment monitoring, Marine environments, Marine fishes, Middleton Island, Oceans, Prey selection, Prince William Sound, Quantitative distribution, Rhinoceros Auklet, Temporal variations, Tufted Puffin, USGS:ASC506, Waders/Gulls/Auks and allies, Wildlife biology, Fewer tags Enteroctopus Sampling Effects on Genetic Data, Prince William Sound, Alaska, 2012-2015 These are genetic data collected from replicated samples of 21 Enteroctopus (E. dofleini or a cryptic lineage) in Prince William Sound Alaska to evaluate tissue type, DNA extraction method, and time until analyses are completed on data reliability. Data collected from all samples include two microsatellites identified as possible lineage indicators, and nine microsatellite loci previously identified as polymorphic in both lineages. DNA sequence data from 528 bp of the octopine dehydrogenase (OCDE) gene were also collected. Categories: Data; Tags: Amino Acid Oxidoreductases, Animals/Invertebrates, Bald Head Chris Island, Biodiversity, Biodiversity, All tags... Biota, Cephalopods, Chenega, DNA, DNA sequencing, Electrophoresis, Environment, Genetic Markers, Genetic diversity, Genetics, Golden Bay, Port Wells, Herring Bay, Long Bay, Marine ecosystems, Microsatellite Repeats, Mollusks, Polymerase chain reaction, Population genetics, Port Wells, Prince William Sound, Prince of Wales Passage, Species diversity, Systematics and taxonomy, USGS:ASC145, Western Prince William Sound, Fewer tags Estimated Post-Emergence Period for Denning Polar Bears of the Chukchi and Beaufort Seas These data are estimates of den emergence date, den site departure dates, and duration at den sites as well as post-emergence observations for female polar bears sampled in the southern Beaufort Sea subpopulation 1985-2016 and the Chukchi Sea subpopulation 2008-2017. The data were used to better understand the importance of time spent at the den site post-emergence. Emergence dates and departure dates were determined using collar temperature sensor data. Tags: Alaska, Animals/Vertebrates, Bears, Beaufort Sea, Behavior, All tags... Biota, Carnivores, Chukchi Sea, Coastal ecosystems, Dens, Environment, Mammals, Marine ecosystems, Marine mammals, Phenology, Polar Bear, Species life history, Threatened species, USGS:ASC591, Ursus maritimus, Wildlife, Fewer tags Geochemical Data from Selected Triassic Rock Samples in Northeastern Alaska This set of data files contains analyses of samples representing Triassic units (Shublik and Ivishak Formations and Karen Creek Sandstone) in Alaska. The samples were collected from 20 outcrop localities in northeastern Alaska. The data set includes total organic carbon (TOC) and geochemical data from inductively coupled plasma-optical emission spectroscopy-mass spectroscopy (ICP-OES-MS) and portable X-ray fluorescence (p-XRF). The data presented here are described and interpreted in a paper titled "Facies Variation within Outcrops of the Triassic Shublik Formation, Northeastern Alaska". Tags: Aichilik River, Alaska, Cache Creek, Camp 263 Creek, Cobble Creek, All tags... Dodo Creek, Earth science, Echooka River, Fire Creek, Geochemistry, Geolex, Ivishak Formation, Karen Creek Sandstone, Kavik River, Kemik Creek, Last Creek, North Slope, Porcupine Lake, Shublik Formation, Stratigraphic sections, Stratigraphic sequence, Stratigraphy, USGS:ASC568, geoscientificInformation, Fewer tags Arthropod Abundance Data from the Colville River Delta, Alaska This data release contains information on the seasonal diversity and abundance of arthropods collected at the Colville River Delta, Alaska, 2011-2012 and 2014-2107. Researchers with the US Geological Survey began studying the reproductive ecology of birds at a site on the Colville River near the Beaufort Sea coast in 2011. Researchers concurrently collected arthropods at 3-day intervals to understand the relationship between the seasonal abundance of arthropods and the reproductive output of insectivorous birds. Categories: Data; Tags: Alaska, Animals/Invertebrates, Arachnida, Arctic Coastal Plain, Arthropods, All tags... Bioenergetics, Biota, Collembola, Colville River Delta, Ecology, Environment, Insecta, Insects, Insects, Invertebrates, Terrestrial ecosystems, Tundra ecosystems, USGS Science Data Catalog (SDC), Wetland ecosystems, Wildlife Biology, Wildlife food habits, Fewer tags Intertidal and Subtidal Sea Otter Prey Sampling in Mixed Sediment Habitat in Glacier Bay National Park and Preserve, Alaska, 1998 to 2011 This dataset provides clam species abundance and size data from intertidal and subtidal mixed sediment habitats in Glacier Bay National Park and Preserve (GBNPP). Data are provided for all observed clams, horse mussels, or urchins 14 mm or larger. Sampling involved excavating 25 cm of substrate from quadrats (approximately 0.25 sq meter) along transects at random and selected sites, 10 quadrats at the 0 Mean Lower Low Water (MLLW) tide level for intertidal sampling and 20 quadrats at approximately 9 m depth for subtidal sampling. Site and taxonomic information are provided. Abundance and size data are provided in two tables with different data configurations: (1) a compact version with data for those species observed... Categories: Data, Data Release - Revised; Tags: Alaska, Animal and plant census, Aquatic Biology, Aquatic biology, Benthic habitat, All tags... Benthos, Biota, Bivalves, Clam, Coastal ecosystems, Ecology, Environment, Glacier Bay National Park and Preserve, Macroinvertebrates, Marine ecosystems, Mollusks, Mollusks, Sea urchin, Trophic relationships, USGS Science Data Catalog (SDC), Wildlife, Wildlife Biology, Fewer tags Pacific Walrus Coastal Haulout Database 1852-2016 We summarize available information on Pacific walrus haulouts from available reports, interviews with coastal residents and aviators, and personal observations of the authors. We provide this in the form of a georeferenced database that may be queried and displayed with standard geographic information system and database management software. The database contains 150 records of Pacific walrus haulouts, with a summary of basic characteristics on maximum haulout size, age-sex composition, season of use, and decade of most recent use. Citations to reports are provided as a bibliographic database. Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Alaska, Arctic, Arctic Ocean, Beaufort Sea, Bering Sea, All tags... Chukchi Sea, Chukotka, East Siberian Sea, Kamchatka, Pacific Ocean, Russian Far East, biota, coast, haulout, marine, marine mammals, Fewer tags 1 2 3 4 5 »