Alaska Science Center Ecosystems data releases are grouped by topic: Terrestrial Ecosystems, Aquatic Ecosystems, Wildlife Health and Genetics, Environmental Health and eDNA, Habitat and Landscape Change, and Ecosystem Analytics.
Return to Ecosystems or ASC Data Releases
Terrestrial Ecosystems | Aquatic Ecosystems | Wildlife Health and Genetics | Environmental Health and eDNA | Habitat and Landscape Change | Ecosystem Analytics
View by subject area:
Birds - Loons | Waterfowl | Shorebirds | Seabirds | Landbirds
Mammals - Caribou | Polar Bears | Walruses | Sea Otters
Fish - Marine and Freshwater Fish | Forage Fish
Landscape - Nearshore Marine | Eelgrass | Rusting Rivers
Genetics and Disease - Molecular Ecology Laboratory | Wildlife Disease
Quantitative Support - Ecosystem Analytics
View by collection:
ASC Wildlife Tracking Data Collection
Terrestrial Ecosystems
Terrestrial Ecosystems
Filter Total Items: 80
Data Supporting Studies of Brant and Other Waterfowl Disturbance Behavior, Distribution, and Diet at Izembek Lagoon, Alaska, 1985-1988 Data Supporting Studies of Brant and Other Waterfowl Disturbance Behavior, Distribution, and Diet at Izembek Lagoon, Alaska, 1985-1988
This data package presents legacy data collected during 1985-1988 at Izembek Lagoon on the western end of the Alaska Peninsula. The data were collected in support of a multi-year study focused on aircraft disturbance of waterfowl, particularly Black Brant, Emperor Geese, and Cackling Geese. The study was conducted at Izembek Lagoon and included several study sites within the lagoon...
Juvenile Shorebird Morphological Data Collected in Alaska and Canada Juvenile Shorebird Morphological Data Collected in Alaska and Canada
This dataset consists of shorebird chick measurements (wing, primary feather 10, diagonal tarsus, and bill length) and body mass for various shorebird species captured in Alaska and Canada during 1978-2022. Researchers with the U.S. Geological Survey - Alaska Science Center, and collaborators from many government agencies and research institutions have studied shorebirds at numerous...
Observation Data of Migratory Birds during Spring and Fall Migration and their use of Habitats in the Yakutat Foreland of Alaska Observation Data of Migratory Birds during Spring and Fall Migration and their use of Habitats in the Yakutat Foreland of Alaska
This data package presents raw legacy data collected during 1980 on the Yakutat Forelands of southeast Alaska. The data were collected to identify and understand the occurrence and distribution of birds and mammals in the ocean and wetlands near Yakutat. Migration "sea watches", aerial surveys, and ground plot surveys were conducted in the foreland area of Yakutat in spring (April - May)...
Aerial Photo Imagery from Fall Waterfowl Surveys, Izembek Lagoon, Alaska, 2017-2019 Aerial Photo Imagery from Fall Waterfowl Surveys, Izembek Lagoon, Alaska, 2017-2019
The imagery and annotations presented here were generated while testing an aerial photographic survey design to improve repeatability, transparency, and estimation of variance for annual population estimates of geese staging at Izembek Lagoon, Alaska. This dataset includes 1) 131,031 .JPG images captured from a small fixed-wing occupied aircraft, usually at an altitude of about 457 m...
Inventory Data of Lowland-Breeding Birds and Associated Vegetation Types on the Alaska Peninsula, 2004-2007 Inventory Data of Lowland-Breeding Birds and Associated Vegetation Types on the Alaska Peninsula, 2004-2007
This release includes data collected using stratified random surveys to inventory the birds breeding in lowlands (elevation below 100m) of the Alaska Peninsula, during summers 2004-2007. Data were collected at 792 survey points (10-minute point counts) on 52 5-km x 5-km plots. The data are in seven tables: 1) geographic coordinates of the bounding corners of each of the 52 survey plots...
Data Supporting Studies of Waterbird and Arctic Lake Ecosystems within the National Petroleum Reserve-Alaska, 1974-1992 Data Supporting Studies of Waterbird and Arctic Lake Ecosystems within the National Petroleum Reserve-Alaska, 1974-1992
This data package presents raw legacy data collected during 1974-1992 on the Arctic Coastal Plain (primarily in the National Petroleum Reserve - Alaska; NPR-A). The data were collected in support of a long-term multi-species wetland ecosystem study that aimed to provide an understanding of occurrence and densities of bird, mammal, fish, invertebrate, and plant species. The study included...
Arthropod Abundance and Shrub Cover and Height on the Seward Peninsula, Alaska, 2015-2016 Arthropod Abundance and Shrub Cover and Height on the Seward Peninsula, Alaska, 2015-2016
This data set contains information (in three tables) with numbers and biomass of invertebrates (primarily arthropods) collected in pitfall-trap arrays and sweep-net samples on a series of plots (n = 13 total) at one coastal and one interior study site on the Seward Peninsula in northwestern Alaska during the summers of 2015 and 2016. Associated data on the horizontal cover and height of...
Bird Species Checklists from USGS Alaska Science Center Field Camps Bird Species Checklists from USGS Alaska Science Center Field Camps
These data are daily summary checklists of all bird species observed at U.S. Geological Survey, Alaska Science Center (ASC) field camps. Data include species observation details such as observers, dates, location, and number of individuals seen.
Aerial surveys of shorebirds at pre-migratory staging sites in western Alaska, 2018-2019 Aerial surveys of shorebirds at pre-migratory staging sites in western Alaska, 2018-2019
These data are in one table and document the numbers of four species of shorebird counted during aerial surveys of coastal sites in western Alaska. Survey regions encompassed coastline between the mouths of the Kuskokwim and Yukon rivers, and the northern coast of the Alaska Peninsula from the mouths of the Kvichak and Naknek Rivers to Nelson Lagoon. Surveys were flown from 7-9 September...
Measurements of Surfbirds (Calidris virgata), Southcentral Alaska 1997-1999 Measurements of Surfbirds (Calidris virgata), Southcentral Alaska 1997-1999
These morphometric data are in two tables from surfbirds (adults and chicks) captured at two locations in southcentral Alaska, 1997-1999.
Aquatic Ecosystems
Aquatic Ecosystems
Filter Total Items: 145
Seabird Diet Data Collected on Middleton Island, Gulf of Alaska 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 the Gulf of Alaska. This data release consists of seabird diet sample data and prey identification and morphometrics.
North Pacific Wintering Barrow's Goldeneye Body Mass, Morphology, and Prey Sizes 1996-2015 North Pacific Wintering Barrow's Goldeneye Body Mass, Morphology, and Prey Sizes 1996-2015
These data provide information in support of the creation of a bioenergetic model to estimate winter prey consumption by Barrow's Goldeneye (Bucephala islandica). One table consists of mass and morphological measurements of wintering Barrows Goldeneyes captured or collected in Alaska and British Columbia from 1996 to 2015. The second table consists of size classes of Pacific blue mussels...
Limnological Data from Experimental Exposure of Juvenile Coho Salmon (Oncorhynchus kisutch) to Elodea in a High Latitude Lake Limnological Data from Experimental Exposure of Juvenile Coho Salmon (Oncorhynchus kisutch) to Elodea in a High Latitude Lake
This dataset provides nine tables of data from an experimental study in which juvenile Coho Salmon (Oncorhynchus kisutch) were reared in floating net pens (limnocorrals) and exposed to Elodea spp. (a potential invasive species in high latititude lakes) and native aquatic vegetation. Data include: (1) coho salmon body, otolith, and stable isotope measurements, (2) abundance of...
Gridded Seabird Density Estimates in Lower Cook Inlet, Alaska Gridded Seabird Density Estimates in Lower Cook Inlet, Alaska
This data set provides monthly (March-October) gridded density estimates for seabirds in lower Cook Inlet, Alaska. Gridded density estimates were produced by applying spatiotemporal modeling of at-sea survey data collected between 1975 and 2021 of seabird at-sea surveys available in the North Pacific Pelagic Seabird Database (NPPSD; Drew and Piatt 2015). We modeled joint dynamic species
Data Supporting Walrus Areas of Use in the Chukchi Sea During Sparse Sea Ice Cover Data Supporting Walrus Areas of Use in the Chukchi Sea During Sparse Sea Ice Cover
The dataset consists of geospatial files depicting the estimated June-to-November distribution of walrus foraging and occupancy during a four year period of sparse sea ice cover above the Chukchi Sea continental shelf (2008-2011). The walrus distribution and utilization estimates are based on location data from satellite-linked radio-tracked walruses in the Chukchi Sea (2008-2011)...
Walrus Haulout and In-water Activity Levels Relative to Vessel Interactions in the Chukchi Sea, 2012-2015 Walrus Haulout and In-water Activity Levels Relative to Vessel Interactions in the Chukchi Sea, 2012-2015
These data were used to evaluate effects of vessel exposure on Pacific walrus (Odobenus rosmarus divergens) behaviors. We obtained greater than 120,000 hours of location and behavior (foraging, in-water not foraging, hauled out) data from 218 satellite-tagged walruses and linked them to vessel locations from the marine Automated Information System. This yielded 206 vessel-exposed walrus...
U.S. Fish and Wildlife Service Tracking Data for Steller's Eiders (Polysticta stelleri) U.S. Fish and Wildlife Service Tracking Data for Steller's Eiders (Polysticta stelleri)
This data release includes 2 child items with tracking data for Steller's Eider, a species of seaduck that breeds throughout the circumpolar Arctic and spends the winter in coastal areas of western and southwestern Alaska. The Alaska-breeding population is listed as threatened under provisions of the Endangered Species Act. Child Item 1: "U.S. Fish and Wildlife Service Argos Satellite...
Nearshore Fish Isotope Values, Beaufort Sea, Alaska, 2017-2019 Nearshore Fish Isotope Values, Beaufort Sea, Alaska, 2017-2019
This dataset contains isotope results of stable isotope (δ13C and δ15N) and radicoarbon (F14C) analyses of muscle tissue from fish collected in the nearshore Beaufort Sea, Alaska in summers 2017-2019.
Rocky Intertidal Data from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park Rocky Intertidal Data from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park
This data package includes four (4) child items with data from the Gulf Watch Alaska (GWA) long-term monitoring program (nearshore monitoring component) rocky intertidal study. Child Item One: "Rocky Intertidal Sea Star Size, Count, and Disease Data from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park". The data include: (1) size and disease state...
Pacific Walrus Coastal Haulout Occurrences Interpreted from Satellite Imagery Pacific Walrus Coastal Haulout Occurrences Interpreted from Satellite Imagery
This dataset is derived from images from a variety of Earth observing satellite imagery sources collected at known walrus coastal haulouts in Alaska and Chukotka, Russia. Earth observing imagery sources used in this data release include (but are not limited to) optical imagery collections by: (1) the European Space Agency's Sentinel-2 mission, (2) the Plant Labs Planet Scope...
Wildlife Health and Genetics
Wildlife Health and Genetics
Filter Total Items: 109
Mercury Concentrations, Diet, and Gut Microbiota Diversity of Southern Beaufort Sea Polar Bears, 2008-2019 Mercury Concentrations, Diet, and Gut Microbiota Diversity of Southern Beaufort Sea Polar Bears, 2008-2019
This dataset is two tables with data collected and derived from polar bears sampled in Alaska's southern Beaufort Sea during 2008-2019. Collected data includes demographic and morphometric information and derived data includes mercury concentrations in hair samples. Ancillary data includes gut microbiome abundances, diversity indices, calculated body condition, and the proportions of...
Cryptosporidium and Giardia Occurrence Data in Wildlife from Arctic Alaska, 2012-2017 Cryptosporidium and Giardia Occurrence Data in Wildlife from Arctic Alaska, 2012-2017
This dataset consists of one table with sample collection locations and results of screening resident wildlife for Cryptosporidium and Giardia in the Alaskan Arctic, 2012-2017. We analyzed feces collected from polar bear, Pacific walrus, Arctic fox, and caribou with MERIFLUOR direct immunofluorescence assay to determine the presence of Cryptosporidium oocysts and Giardia cysts.
DNA Microsatellite and Sex Identification Marker Screening for Mexican Spotted Owl (Strix occidentalis lucida) DNA Microsatellite and Sex Identification Marker Screening for Mexican Spotted Owl (Strix occidentalis lucida)
Two tables of data are included in this data release. The first table provides screening results for 32 previously described and/or published microsatellites and 1 sexing marker, primer redesigns for use in Mexican Spotted Owls in this data release, and size of markers in Mexican Spotted Owls. The second table provides microsatellite and sexing marker results for 10 tissue and 98 feather...
Southern Beaufort Sea Polar Bear Blood Based Analyte Data, 1983-2018 Southern Beaufort Sea Polar Bear Blood Based Analyte Data, 1983-2018
This dataset is one table with data collected and derived from polar bears sampled in Alaska's southern Beaufort Sea during 1983-2018. Collected data includes demographic and morphometric information. Derived data includes blood-based analyte values determined from whole blood and serum samples. Serum samples were analyzed on an Abaxis VS2 Biochemistry Analyzer and whole blood samples...
Southern Beaufort Sea Polar Bear Diet and Gut Microbiota Data, 2015-2019 Southern Beaufort Sea Polar Bear Diet and Gut Microbiota Data, 2015-2019
This dataset is one table with data collected and derived from polar bears sampled in Alaska's southern Beaufort Sea during 2015-2019. Data include demographic and morphometric information from each sampled polar bear, gut microbiome diversity indices derived from fecal DNA metabarcoding, and the proportion of prey species detected in individual bear diets derived from quantitative fatty...
Waterfowl Lead Exposure Data in Alaska and Russia, 1993-2022 Waterfowl Lead Exposure Data in Alaska and Russia, 1993-2022
This dataset identifies lead (Pb) concentration found in the blood of waterfowl sampled in western and northern Alaska and eastern Russia between 1993 and 2022. Data include age, sex, body measurement, capture location, presence or absence of lead shot on x-rays, and blood lead levels. Because the study took place over a number of years at the same study sites, many of the same birds...
Gavia Species Identification and Diet Composition from Feces, Central North Slope, Alaska, 2012-2014 Gavia Species Identification and Diet Composition from Feces, Central North Slope, Alaska, 2012-2014
This data set is comprised of one table with sampling information and NCBI BioProject accession numbers for sequence information of this amplicon-based study targeting Loon (Gavia sp.) and fish species expected in lake systems of the North Slope of Alaska from fecal samples. Highly conserved primers which could differentiate species of interest were developed for five portions of gavia...
Serological Survey Data for Francisella tularensis and Brucella spp. Exposure in Wildlife on the Arctic Coastal Plain of Alaska Serological Survey Data for Francisella tularensis and Brucella spp. Exposure in Wildlife on the Arctic Coastal Plain of Alaska
This dataset consists of one table with diagnostic screening results from a study of Francisella tularensis bacteria exposure in tundra-nesting geese and mammals and Brucella spp. exposure in mammals sampled from multiple locations on the Arctic Coastal Plain of Alaska, 2014-2017. The table provides sample collection and location data of geese, arctic fox, red fox, caribou, small mammal...
Alaska Science Center Data Sheets from Intracoelomic Transmitter Implant and Liver Biopsy Surgeries in Birds, 1993-2012 Alaska Science Center Data Sheets from Intracoelomic Transmitter Implant and Liver Biopsy Surgeries in Birds, 1993-2012
These are surgery data sheets filled out during operations on many bird species by the USGS Alaska Science Center, 1993-2012. The majority of surgeries were to implant intracoelomic tracking transmitters, but a subset were to collect liver biopsy samples. The data sheets provide information about individual surgeries, including: data about each bird, the timing of steps during each...
Harmful Algal Bloom Toxins in Seabirds, Forage Fish, and Marine Invertebrates Across Alaska Harmful Algal Bloom Toxins in Seabirds, Forage Fish, and Marine Invertebrates Across Alaska
These data include results from screening tissues of marine organisms for the presence of harmful algal bloom (HAB) toxins: saxitoxin and its related congeners (STX) and domoic acid (DA). Samples collected by USGS or submitted to our laboratory by partners or other stakeholders are screened using commercially available enzyme linked immunosorbent assays (ELISA). A subset of samples...
Environmental Health and eDNA
Environmental Health and eDNA
Habitat and Landscape Change
Habitat and Landscape Change
Filter Total Items: 38
Continuous Records of Shallow Soil Temperature and Moisture in the Noatak River Basin, Alaska Continuous Records of Shallow Soil Temperature and Moisture in the Noatak River Basin, Alaska
Soil moisture and temperature were measured at four shallow depths in multiple locations within tundra and forested landscapes of the Agashashok River basin. The measurements were made continuously beginning in 2015 until the most recent download in summer, 2019 or until the sensors or loggers failed.
Meteorological Data from Two Locations in the Agashashok River Watershed, Northwestern Alaska, 2015 to 2017 Meteorological Data from Two Locations in the Agashashok River Watershed, Northwestern Alaska, 2015 to 2017
Meteorological data was collected from two locations in the Agashashok River Watershed, one high in the drainage located on tundra (67.5440 N, 161.6828 W) and a second on a rocky knoll near the watershed mouth (67.2821 N, 162.5841 W). The data contain information on air temperatures, rainfall, barometric pressure, relative humidity, incoming and outgoing radiation, and wind speed and...
Land Cover Estimates for the Kenai Peninsula Lowlands, 1973, 2002, and 2017 Land Cover Estimates for the Kenai Peninsula Lowlands, 1973, 2002, and 2017
These raster images represent continuous surfaces of estimated land cover types for the western Kenai Peninsula circa 1973, circa 2002, and circa 2017. The estimated land cover types (Needleleaf Forest, Mixed Forest, Broadleaf Forest, Herbaceous, Wetland, Alpine, Barren, Shrub, Water) were derived from a random forest classifier executed in R (version 3.5.0). Predictor variables from...
Glacier Runoff in Gulf of Alaska Fjords, 2004-2011 Glacier Runoff in Gulf of Alaska Fjords, 2004-2011
Marine ecosystems respond to a range of habitat variability in coastal zones modified by glacial freshwater outflows, biophysical data were collected in three study regions that included four major glacial fjord systems around the Gulf of Alaska. A suite of geographic, oceanographic, nutrient and biological attributes were sampled at these three study regions during peak ice-melt season...
Caribou Forage and Soil Data, North Slope of Alaska, 2011-2014 Caribou Forage and Soil Data, North Slope of Alaska, 2011-2014
These data are nutrient concentrations of seven key forage-plant species in the ranges of three caribou herds, in northern Alaska. During the growing seasons of 2011-2014, we collected forage samples from 21 plots within the ranges of three caribou herds: Central Arctic Herd (2011-2013), Teshekpuk (2011-2013), Western Arctic (2013-2014). We also analyzed stable isotopes of carbon (13C)...
SUPERSEDED: Gulf Watch Alaska Nearshore Component: Marine Water Quality, Water Temperature from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park, 2014-2016 SUPERSEDED: Gulf Watch Alaska Nearshore Component: Marine Water Quality, Water Temperature from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park, 2014-2016
This data release has been SUPERSEDED. No data are provided here. Data from Gulf Watch Alaska nearshore water and air temperature sampling data releases have been appended to U.S. Geological Survey data release: https://doi.org/10.5066/F7WH2N3T. This data is part of the Gulf Watch Alaska (GWA) long term monitoring program, nearshore monitoring component. The data consists of date, time...
Bering Land Bridge Lake Classification, Seward Peninsula, Alaska, 2012-2016 Bering Land Bridge Lake Classification, Seward Peninsula, Alaska, 2012-2016
This study focuses on a 67 attribute lake cover classification scheme covering the Bering Land Bridge area of the Seward Peninsula, Alaska. The GIS dataset consists of 5170 lakes (which were extracted from a 5m resolution ifSAR/orthophoto image) and provides information on lake morphometry, hydrologic connectivity, surface area dynamics, surrounding terrestrial ecotypes, bedfast...
Fish Creek Watershed Lake Classification, NPRA, Alaska, 2016 Fish Creek Watershed Lake Classification, NPRA, Alaska, 2016
This study focuses on the development of a 20 attribute lake cover classification scheme for the Fish Creek Watershed (FCW), which is located in the National Petroleum Reserve-Alaska (NPR-A). The GIS dataset consists of 4,362 lakes (which were extracted from a 5m resolution IfSAR/orthophoto image) covering 18% of the 4,900 km2 FCW and provides information on lake morphometry, hydrologic
Ecosystem Analytics
Ecosystem Analytics
Alaska Science Center Ecosystems data releases are grouped by topic: Terrestrial Ecosystems, Aquatic Ecosystems, Wildlife Health and Genetics, Environmental Health and eDNA, Habitat and Landscape Change, and Ecosystem Analytics.
Return to Ecosystems or ASC Data Releases
Terrestrial Ecosystems | Aquatic Ecosystems | Wildlife Health and Genetics | Environmental Health and eDNA | Habitat and Landscape Change | Ecosystem Analytics
View by subject area:
Birds - Loons | Waterfowl | Shorebirds | Seabirds | Landbirds
Mammals - Caribou | Polar Bears | Walruses | Sea Otters
Fish - Marine and Freshwater Fish | Forage Fish
Landscape - Nearshore Marine | Eelgrass | Rusting Rivers
Genetics and Disease - Molecular Ecology Laboratory | Wildlife Disease
Quantitative Support - Ecosystem Analytics
View by collection:
ASC Wildlife Tracking Data Collection
Terrestrial Ecosystems
Terrestrial Ecosystems
Filter Total Items: 80
Data Supporting Studies of Brant and Other Waterfowl Disturbance Behavior, Distribution, and Diet at Izembek Lagoon, Alaska, 1985-1988 Data Supporting Studies of Brant and Other Waterfowl Disturbance Behavior, Distribution, and Diet at Izembek Lagoon, Alaska, 1985-1988
This data package presents legacy data collected during 1985-1988 at Izembek Lagoon on the western end of the Alaska Peninsula. The data were collected in support of a multi-year study focused on aircraft disturbance of waterfowl, particularly Black Brant, Emperor Geese, and Cackling Geese. The study was conducted at Izembek Lagoon and included several study sites within the lagoon...
Juvenile Shorebird Morphological Data Collected in Alaska and Canada Juvenile Shorebird Morphological Data Collected in Alaska and Canada
This dataset consists of shorebird chick measurements (wing, primary feather 10, diagonal tarsus, and bill length) and body mass for various shorebird species captured in Alaska and Canada during 1978-2022. Researchers with the U.S. Geological Survey - Alaska Science Center, and collaborators from many government agencies and research institutions have studied shorebirds at numerous...
Observation Data of Migratory Birds during Spring and Fall Migration and their use of Habitats in the Yakutat Foreland of Alaska Observation Data of Migratory Birds during Spring and Fall Migration and their use of Habitats in the Yakutat Foreland of Alaska
This data package presents raw legacy data collected during 1980 on the Yakutat Forelands of southeast Alaska. The data were collected to identify and understand the occurrence and distribution of birds and mammals in the ocean and wetlands near Yakutat. Migration "sea watches", aerial surveys, and ground plot surveys were conducted in the foreland area of Yakutat in spring (April - May)...
Aerial Photo Imagery from Fall Waterfowl Surveys, Izembek Lagoon, Alaska, 2017-2019 Aerial Photo Imagery from Fall Waterfowl Surveys, Izembek Lagoon, Alaska, 2017-2019
The imagery and annotations presented here were generated while testing an aerial photographic survey design to improve repeatability, transparency, and estimation of variance for annual population estimates of geese staging at Izembek Lagoon, Alaska. This dataset includes 1) 131,031 .JPG images captured from a small fixed-wing occupied aircraft, usually at an altitude of about 457 m...
Inventory Data of Lowland-Breeding Birds and Associated Vegetation Types on the Alaska Peninsula, 2004-2007 Inventory Data of Lowland-Breeding Birds and Associated Vegetation Types on the Alaska Peninsula, 2004-2007
This release includes data collected using stratified random surveys to inventory the birds breeding in lowlands (elevation below 100m) of the Alaska Peninsula, during summers 2004-2007. Data were collected at 792 survey points (10-minute point counts) on 52 5-km x 5-km plots. The data are in seven tables: 1) geographic coordinates of the bounding corners of each of the 52 survey plots...
Data Supporting Studies of Waterbird and Arctic Lake Ecosystems within the National Petroleum Reserve-Alaska, 1974-1992 Data Supporting Studies of Waterbird and Arctic Lake Ecosystems within the National Petroleum Reserve-Alaska, 1974-1992
This data package presents raw legacy data collected during 1974-1992 on the Arctic Coastal Plain (primarily in the National Petroleum Reserve - Alaska; NPR-A). The data were collected in support of a long-term multi-species wetland ecosystem study that aimed to provide an understanding of occurrence and densities of bird, mammal, fish, invertebrate, and plant species. The study included...
Arthropod Abundance and Shrub Cover and Height on the Seward Peninsula, Alaska, 2015-2016 Arthropod Abundance and Shrub Cover and Height on the Seward Peninsula, Alaska, 2015-2016
This data set contains information (in three tables) with numbers and biomass of invertebrates (primarily arthropods) collected in pitfall-trap arrays and sweep-net samples on a series of plots (n = 13 total) at one coastal and one interior study site on the Seward Peninsula in northwestern Alaska during the summers of 2015 and 2016. Associated data on the horizontal cover and height of...
Bird Species Checklists from USGS Alaska Science Center Field Camps Bird Species Checklists from USGS Alaska Science Center Field Camps
These data are daily summary checklists of all bird species observed at U.S. Geological Survey, Alaska Science Center (ASC) field camps. Data include species observation details such as observers, dates, location, and number of individuals seen.
Aerial surveys of shorebirds at pre-migratory staging sites in western Alaska, 2018-2019 Aerial surveys of shorebirds at pre-migratory staging sites in western Alaska, 2018-2019
These data are in one table and document the numbers of four species of shorebird counted during aerial surveys of coastal sites in western Alaska. Survey regions encompassed coastline between the mouths of the Kuskokwim and Yukon rivers, and the northern coast of the Alaska Peninsula from the mouths of the Kvichak and Naknek Rivers to Nelson Lagoon. Surveys were flown from 7-9 September...
Measurements of Surfbirds (Calidris virgata), Southcentral Alaska 1997-1999 Measurements of Surfbirds (Calidris virgata), Southcentral Alaska 1997-1999
These morphometric data are in two tables from surfbirds (adults and chicks) captured at two locations in southcentral Alaska, 1997-1999.
Aquatic Ecosystems
Aquatic Ecosystems
Filter Total Items: 145
Seabird Diet Data Collected on Middleton Island, Gulf of Alaska 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 the Gulf of Alaska. This data release consists of seabird diet sample data and prey identification and morphometrics.
North Pacific Wintering Barrow's Goldeneye Body Mass, Morphology, and Prey Sizes 1996-2015 North Pacific Wintering Barrow's Goldeneye Body Mass, Morphology, and Prey Sizes 1996-2015
These data provide information in support of the creation of a bioenergetic model to estimate winter prey consumption by Barrow's Goldeneye (Bucephala islandica). One table consists of mass and morphological measurements of wintering Barrows Goldeneyes captured or collected in Alaska and British Columbia from 1996 to 2015. The second table consists of size classes of Pacific blue mussels...
Limnological Data from Experimental Exposure of Juvenile Coho Salmon (Oncorhynchus kisutch) to Elodea in a High Latitude Lake Limnological Data from Experimental Exposure of Juvenile Coho Salmon (Oncorhynchus kisutch) to Elodea in a High Latitude Lake
This dataset provides nine tables of data from an experimental study in which juvenile Coho Salmon (Oncorhynchus kisutch) were reared in floating net pens (limnocorrals) and exposed to Elodea spp. (a potential invasive species in high latititude lakes) and native aquatic vegetation. Data include: (1) coho salmon body, otolith, and stable isotope measurements, (2) abundance of...
Gridded Seabird Density Estimates in Lower Cook Inlet, Alaska Gridded Seabird Density Estimates in Lower Cook Inlet, Alaska
This data set provides monthly (March-October) gridded density estimates for seabirds in lower Cook Inlet, Alaska. Gridded density estimates were produced by applying spatiotemporal modeling of at-sea survey data collected between 1975 and 2021 of seabird at-sea surveys available in the North Pacific Pelagic Seabird Database (NPPSD; Drew and Piatt 2015). We modeled joint dynamic species
Data Supporting Walrus Areas of Use in the Chukchi Sea During Sparse Sea Ice Cover Data Supporting Walrus Areas of Use in the Chukchi Sea During Sparse Sea Ice Cover
The dataset consists of geospatial files depicting the estimated June-to-November distribution of walrus foraging and occupancy during a four year period of sparse sea ice cover above the Chukchi Sea continental shelf (2008-2011). The walrus distribution and utilization estimates are based on location data from satellite-linked radio-tracked walruses in the Chukchi Sea (2008-2011)...
Walrus Haulout and In-water Activity Levels Relative to Vessel Interactions in the Chukchi Sea, 2012-2015 Walrus Haulout and In-water Activity Levels Relative to Vessel Interactions in the Chukchi Sea, 2012-2015
These data were used to evaluate effects of vessel exposure on Pacific walrus (Odobenus rosmarus divergens) behaviors. We obtained greater than 120,000 hours of location and behavior (foraging, in-water not foraging, hauled out) data from 218 satellite-tagged walruses and linked them to vessel locations from the marine Automated Information System. This yielded 206 vessel-exposed walrus...
U.S. Fish and Wildlife Service Tracking Data for Steller's Eiders (Polysticta stelleri) U.S. Fish and Wildlife Service Tracking Data for Steller's Eiders (Polysticta stelleri)
This data release includes 2 child items with tracking data for Steller's Eider, a species of seaduck that breeds throughout the circumpolar Arctic and spends the winter in coastal areas of western and southwestern Alaska. The Alaska-breeding population is listed as threatened under provisions of the Endangered Species Act. Child Item 1: "U.S. Fish and Wildlife Service Argos Satellite...
Nearshore Fish Isotope Values, Beaufort Sea, Alaska, 2017-2019 Nearshore Fish Isotope Values, Beaufort Sea, Alaska, 2017-2019
This dataset contains isotope results of stable isotope (δ13C and δ15N) and radicoarbon (F14C) analyses of muscle tissue from fish collected in the nearshore Beaufort Sea, Alaska in summers 2017-2019.
Rocky Intertidal Data from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park Rocky Intertidal Data from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park
This data package includes four (4) child items with data from the Gulf Watch Alaska (GWA) long-term monitoring program (nearshore monitoring component) rocky intertidal study. Child Item One: "Rocky Intertidal Sea Star Size, Count, and Disease Data from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park". The data include: (1) size and disease state...
Pacific Walrus Coastal Haulout Occurrences Interpreted from Satellite Imagery Pacific Walrus Coastal Haulout Occurrences Interpreted from Satellite Imagery
This dataset is derived from images from a variety of Earth observing satellite imagery sources collected at known walrus coastal haulouts in Alaska and Chukotka, Russia. Earth observing imagery sources used in this data release include (but are not limited to) optical imagery collections by: (1) the European Space Agency's Sentinel-2 mission, (2) the Plant Labs Planet Scope...
Wildlife Health and Genetics
Wildlife Health and Genetics
Filter Total Items: 109
Mercury Concentrations, Diet, and Gut Microbiota Diversity of Southern Beaufort Sea Polar Bears, 2008-2019 Mercury Concentrations, Diet, and Gut Microbiota Diversity of Southern Beaufort Sea Polar Bears, 2008-2019
This dataset is two tables with data collected and derived from polar bears sampled in Alaska's southern Beaufort Sea during 2008-2019. Collected data includes demographic and morphometric information and derived data includes mercury concentrations in hair samples. Ancillary data includes gut microbiome abundances, diversity indices, calculated body condition, and the proportions of...
Cryptosporidium and Giardia Occurrence Data in Wildlife from Arctic Alaska, 2012-2017 Cryptosporidium and Giardia Occurrence Data in Wildlife from Arctic Alaska, 2012-2017
This dataset consists of one table with sample collection locations and results of screening resident wildlife for Cryptosporidium and Giardia in the Alaskan Arctic, 2012-2017. We analyzed feces collected from polar bear, Pacific walrus, Arctic fox, and caribou with MERIFLUOR direct immunofluorescence assay to determine the presence of Cryptosporidium oocysts and Giardia cysts.
DNA Microsatellite and Sex Identification Marker Screening for Mexican Spotted Owl (Strix occidentalis lucida) DNA Microsatellite and Sex Identification Marker Screening for Mexican Spotted Owl (Strix occidentalis lucida)
Two tables of data are included in this data release. The first table provides screening results for 32 previously described and/or published microsatellites and 1 sexing marker, primer redesigns for use in Mexican Spotted Owls in this data release, and size of markers in Mexican Spotted Owls. The second table provides microsatellite and sexing marker results for 10 tissue and 98 feather...
Southern Beaufort Sea Polar Bear Blood Based Analyte Data, 1983-2018 Southern Beaufort Sea Polar Bear Blood Based Analyte Data, 1983-2018
This dataset is one table with data collected and derived from polar bears sampled in Alaska's southern Beaufort Sea during 1983-2018. Collected data includes demographic and morphometric information. Derived data includes blood-based analyte values determined from whole blood and serum samples. Serum samples were analyzed on an Abaxis VS2 Biochemistry Analyzer and whole blood samples...
Southern Beaufort Sea Polar Bear Diet and Gut Microbiota Data, 2015-2019 Southern Beaufort Sea Polar Bear Diet and Gut Microbiota Data, 2015-2019
This dataset is one table with data collected and derived from polar bears sampled in Alaska's southern Beaufort Sea during 2015-2019. Data include demographic and morphometric information from each sampled polar bear, gut microbiome diversity indices derived from fecal DNA metabarcoding, and the proportion of prey species detected in individual bear diets derived from quantitative fatty...
Waterfowl Lead Exposure Data in Alaska and Russia, 1993-2022 Waterfowl Lead Exposure Data in Alaska and Russia, 1993-2022
This dataset identifies lead (Pb) concentration found in the blood of waterfowl sampled in western and northern Alaska and eastern Russia between 1993 and 2022. Data include age, sex, body measurement, capture location, presence or absence of lead shot on x-rays, and blood lead levels. Because the study took place over a number of years at the same study sites, many of the same birds...
Gavia Species Identification and Diet Composition from Feces, Central North Slope, Alaska, 2012-2014 Gavia Species Identification and Diet Composition from Feces, Central North Slope, Alaska, 2012-2014
This data set is comprised of one table with sampling information and NCBI BioProject accession numbers for sequence information of this amplicon-based study targeting Loon (Gavia sp.) and fish species expected in lake systems of the North Slope of Alaska from fecal samples. Highly conserved primers which could differentiate species of interest were developed for five portions of gavia...
Serological Survey Data for Francisella tularensis and Brucella spp. Exposure in Wildlife on the Arctic Coastal Plain of Alaska Serological Survey Data for Francisella tularensis and Brucella spp. Exposure in Wildlife on the Arctic Coastal Plain of Alaska
This dataset consists of one table with diagnostic screening results from a study of Francisella tularensis bacteria exposure in tundra-nesting geese and mammals and Brucella spp. exposure in mammals sampled from multiple locations on the Arctic Coastal Plain of Alaska, 2014-2017. The table provides sample collection and location data of geese, arctic fox, red fox, caribou, small mammal...
Alaska Science Center Data Sheets from Intracoelomic Transmitter Implant and Liver Biopsy Surgeries in Birds, 1993-2012 Alaska Science Center Data Sheets from Intracoelomic Transmitter Implant and Liver Biopsy Surgeries in Birds, 1993-2012
These are surgery data sheets filled out during operations on many bird species by the USGS Alaska Science Center, 1993-2012. The majority of surgeries were to implant intracoelomic tracking transmitters, but a subset were to collect liver biopsy samples. The data sheets provide information about individual surgeries, including: data about each bird, the timing of steps during each...
Harmful Algal Bloom Toxins in Seabirds, Forage Fish, and Marine Invertebrates Across Alaska Harmful Algal Bloom Toxins in Seabirds, Forage Fish, and Marine Invertebrates Across Alaska
These data include results from screening tissues of marine organisms for the presence of harmful algal bloom (HAB) toxins: saxitoxin and its related congeners (STX) and domoic acid (DA). Samples collected by USGS or submitted to our laboratory by partners or other stakeholders are screened using commercially available enzyme linked immunosorbent assays (ELISA). A subset of samples...
Environmental Health and eDNA
Environmental Health and eDNA
Habitat and Landscape Change
Habitat and Landscape Change
Filter Total Items: 38
Continuous Records of Shallow Soil Temperature and Moisture in the Noatak River Basin, Alaska Continuous Records of Shallow Soil Temperature and Moisture in the Noatak River Basin, Alaska
Soil moisture and temperature were measured at four shallow depths in multiple locations within tundra and forested landscapes of the Agashashok River basin. The measurements were made continuously beginning in 2015 until the most recent download in summer, 2019 or until the sensors or loggers failed.
Meteorological Data from Two Locations in the Agashashok River Watershed, Northwestern Alaska, 2015 to 2017 Meteorological Data from Two Locations in the Agashashok River Watershed, Northwestern Alaska, 2015 to 2017
Meteorological data was collected from two locations in the Agashashok River Watershed, one high in the drainage located on tundra (67.5440 N, 161.6828 W) and a second on a rocky knoll near the watershed mouth (67.2821 N, 162.5841 W). The data contain information on air temperatures, rainfall, barometric pressure, relative humidity, incoming and outgoing radiation, and wind speed and...
Land Cover Estimates for the Kenai Peninsula Lowlands, 1973, 2002, and 2017 Land Cover Estimates for the Kenai Peninsula Lowlands, 1973, 2002, and 2017
These raster images represent continuous surfaces of estimated land cover types for the western Kenai Peninsula circa 1973, circa 2002, and circa 2017. The estimated land cover types (Needleleaf Forest, Mixed Forest, Broadleaf Forest, Herbaceous, Wetland, Alpine, Barren, Shrub, Water) were derived from a random forest classifier executed in R (version 3.5.0). Predictor variables from...
Glacier Runoff in Gulf of Alaska Fjords, 2004-2011 Glacier Runoff in Gulf of Alaska Fjords, 2004-2011
Marine ecosystems respond to a range of habitat variability in coastal zones modified by glacial freshwater outflows, biophysical data were collected in three study regions that included four major glacial fjord systems around the Gulf of Alaska. A suite of geographic, oceanographic, nutrient and biological attributes were sampled at these three study regions during peak ice-melt season...
Caribou Forage and Soil Data, North Slope of Alaska, 2011-2014 Caribou Forage and Soil Data, North Slope of Alaska, 2011-2014
These data are nutrient concentrations of seven key forage-plant species in the ranges of three caribou herds, in northern Alaska. During the growing seasons of 2011-2014, we collected forage samples from 21 plots within the ranges of three caribou herds: Central Arctic Herd (2011-2013), Teshekpuk (2011-2013), Western Arctic (2013-2014). We also analyzed stable isotopes of carbon (13C)...
SUPERSEDED: Gulf Watch Alaska Nearshore Component: Marine Water Quality, Water Temperature from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park, 2014-2016 SUPERSEDED: Gulf Watch Alaska Nearshore Component: Marine Water Quality, Water Temperature from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park, 2014-2016
This data release has been SUPERSEDED. No data are provided here. Data from Gulf Watch Alaska nearshore water and air temperature sampling data releases have been appended to U.S. Geological Survey data release: https://doi.org/10.5066/F7WH2N3T. This data is part of the Gulf Watch Alaska (GWA) long term monitoring program, nearshore monitoring component. The data consists of date, time...
Bering Land Bridge Lake Classification, Seward Peninsula, Alaska, 2012-2016 Bering Land Bridge Lake Classification, Seward Peninsula, Alaska, 2012-2016
This study focuses on a 67 attribute lake cover classification scheme covering the Bering Land Bridge area of the Seward Peninsula, Alaska. The GIS dataset consists of 5170 lakes (which were extracted from a 5m resolution ifSAR/orthophoto image) and provides information on lake morphometry, hydrologic connectivity, surface area dynamics, surrounding terrestrial ecotypes, bedfast...
Fish Creek Watershed Lake Classification, NPRA, Alaska, 2016 Fish Creek Watershed Lake Classification, NPRA, Alaska, 2016
This study focuses on the development of a 20 attribute lake cover classification scheme for the Fish Creek Watershed (FCW), which is located in the National Petroleum Reserve-Alaska (NPR-A). The GIS dataset consists of 4,362 lakes (which were extracted from a 5m resolution IfSAR/orthophoto image) covering 18% of the 4,900 km2 FCW and provides information on lake morphometry, hydrologic
Ecosystem Analytics
Ecosystem Analytics