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: 87
Waterfowl Census Data during Fall Migration at Nanvak Bay, Togiak National Wildlife Refuge, Alaska, 1992 Waterfowl Census Data during Fall Migration at Nanvak Bay, Togiak National Wildlife Refuge, Alaska, 1992
Waterfowl were observed staging at Nanvak Bay, Togiak National Wildlife Refuge in southwest Alaska between 31 August and 27 September 1992. This data release contains five tables including 1) aerial surveys, 2) band resights for Black Brant (Branta bernicla nigricans), 3) Black Brant age ratios, 4) bird migration observations, and 5) taxonomy table for observed birds.
Emperor Goose (Anser canagicus) Mark-recapture and Resight Encounter History from the Yukon-Kuskokwim Delta, Alaska, 1994-2017 Emperor Goose (Anser canagicus) Mark-recapture and Resight Encounter History from the Yukon-Kuskokwim Delta, Alaska, 1994-2017
This dataset is in one table with mark-recapture and resight data of Emperor Geese marked with plastic color bands on the Yukon-Kuskokwim Delta in Alaska, 1994-2017.
Movements of Black Brant Tagged While Molting in the National Petroleum Reserve - Alaska Movements of Black Brant Tagged While Molting in the National Petroleum Reserve - Alaska
This data release contains five tables of information related to the movement patterns of Black Brant equipped with high-frequency GPS tags: 1) brant banding records, 2) helicopter flight routes for experimental disturbance trials, 3) Brant movement data from Milsar tags deployed in 2023, 4) Brant movement data from Milsar tags deployed in 2024, and 5) Brant movement data from Ornitela...
Movement Metrics of Adult Female Grizzly Bears and Polar Bears Used to Identify Cub Presence with Machine Learning Movement Metrics of Adult Female Grizzly Bears and Polar Bears Used to Identify Cub Presence with Machine Learning
These data represent movement metrics of adult female grizzly bears and polar bears with and without cubs-of-the-year at seven temporal scales after den departure. Grizzly bear data were collected in the Greater Yellowstone Ecosystem during 2000–2021 and in the Northern Continental Divide Ecosystem during 2003–2022. Polar bear data were collected in the Southern Beaufort Sea during 1986...
GPS Tracking Data for Caribou (Rangifer tarandus granti) from the Denali Herd, Alaska, 2010-2018 GPS Tracking Data for Caribou (Rangifer tarandus granti) from the Denali Herd, Alaska, 2010-2018
GPS collar location data were collected as part of a long-term study on caribou (Rangifer tarandus granti) in the Denali herd of Alaska. Collars were deployed on adult (greater than or equal to 2 years) female caribou from 2010-2013, and then refurbished and redeployed on adult (greater than or equal to 4 years) male caribou from 2014-2018. The collars were manufactured by Telonics (TGW...
GPS Tracking Data for the Nelchina Herd Caribou (Rangifer tarandus granti), Alaska, 1999-2002 GPS Tracking Data for the Nelchina Herd Caribou (Rangifer tarandus granti), Alaska, 1999-2002
These data were part of a tracking study of adult female caribou from the Nelchina Herd in Alaska. The dataset is comprised of two comma separated values (.csv) files. Data includes: 1) processed (i.e., erroneous locations removed) GPS locations for caribou, received once per 7 hours (October 1999 to October 2002), and 2) spatial, temporal, and biological attributes of the female caribou...
Comparison of Acoustic Recorders and Field Observers for Monitoring Tundra Bird Communities in Northwestern Alaska Comparison of Acoustic Recorders and Field Observers for Monitoring Tundra Bird Communities in Northwestern Alaska
Acoustic recorders can detect the presence of birds and these detections may be used for the purpose of population abundance or estimation. This monitoring project compared the abundance of tundra-breeding birds detected through both acoustic monitoring and observational surveys. The data package is comprised of four tables: (1) habitat type, including vegetation height at sites where...
Emperor Goose (Anser canagicus) Nest Visit, Fate, and Dispersal Distances from the Yukon-Kuskokwim Delta, Alaska, 2000-2017 Emperor Goose (Anser canagicus) Nest Visit, Fate, and Dispersal Distances from the Yukon-Kuskokwim Delta, Alaska, 2000-2017
These data are in two tables: 1) table relating to emperor goose nest visit, nest fate, and nest dispersal distances on the Yukon-Kuskokwim Delta in Alaska, 2000-2017; 2) table with means and standard deviations for posterior distributions of predicted nest-age and year specific daily nest survival probabilities for emperor geese derived from estimates reported by Thompson et al. (2023)...
Aerial Surveys of Rock Sandpiper During Winter in upper Cook Inlet, Alaska, 1997-2012 Aerial Surveys of Rock Sandpiper During Winter in upper Cook Inlet, Alaska, 1997-2012
This data release consists of one table of multi-year observations of Rock Sandpipers (Calidris ptilocnemis) and aerial photographs of Rock Sandpiper flocks at sites in upper Cook Inlet, Alaska, 1997-2014.
Nesting Period Data for Black Brant (Branta bernicla nigricans) in Alaska Nesting Period Data for Black Brant (Branta bernicla nigricans) in Alaska
This data package contains one table with nest initiation and end dates and clutch sizes from Black Brant (Branta bernicla nigricans) at two breeding colonies in Alaska. Data include nesting period determined by either nest visits or light-level data recorded by geolocators attached tarsal bands.
Aquatic Ecosystems
Aquatic Ecosystems
Filter Total Items: 152
Walrus Counts Apparent from Aerial Survey Images Collected Near Point Lay, Alaska Walrus Counts Apparent from Aerial Survey Images Collected Near Point Lay, Alaska
This dataset provides walrus counts in 10 m by 10 m square grid cells randomly selected from a standard set of grid cells established for the study area and that intersected with previously published walrus herd outlines and overlain on aerial survey imagery. Results are provided as geospatial polygons saved in the shapefile format. These data are based on visual interpretation of...
Data from Migratory Bird Aerial Surveys and Habitat, Nest Success, and Genetic Samples from Spectacled Eiders (Somateria fischeri) on the Indigirka River Delta, Russia Data from Migratory Bird Aerial Surveys and Habitat, Nest Success, and Genetic Samples from Spectacled Eiders (Somateria fischeri) on the Indigirka River Delta, Russia
This data release contains five spreadsheets of information from aerial surveys of the Indigirka River Delta, Russia, in June of 1993 and 1994, data on habitats where nests of Spectacled Eiders (Somateria fischeri) and other species of waterfowl were observed from 1993 to 1995, and genotypic data from feathers collected from eider nests to determine inter-annual rates of return by...
Southern Beaufort Sea Polar Bear Mark Recapture Data, 2000-2023 Southern Beaufort Sea Polar Bear Mark Recapture Data, 2000-2023
This dataset is one table with data collected and derived from polar bears sampled in Alaska from the Southern Beaufort Sea subpopulation during 2000-2023. Collected data includes individual identity, location of observation, observation type, estimated birth year, and demographic information. Data were collected from polar bears that were captured, remotely sampled using biopsy darts...
Walrus Haulout Audio Recordings Near Point Lay 2024 Walrus Haulout Audio Recordings Near Point Lay 2024
This dataset consists of a complete set of audio recordings collected near a large walrus haulout at Point Lay, Alaska, during September of 2024. The recordings were collected using the Song Meter Mini 2 (Wildlife Acoustics, Inc., Maynard, MA) at two sites, one within 150 m of a large walrus herd resting on shore and one placed more than 4 km to the south of the herd directly under the...
Bureau of Land Management Data on Breeding Ecology and Behavioral Responses of Loons to Oilfield Development Activities in the Fish Creek Watershed, National Petroleum Reserve in Alaska, 2016 and 2017 Bureau of Land Management Data on Breeding Ecology and Behavioral Responses of Loons to Oilfield Development Activities in the Fish Creek Watershed, National Petroleum Reserve in Alaska, 2016 and 2017
These data consist of the behavioral responses of Pacific and Yellow-billed Loons to helicopter overflights and ground-based human activity in disturbed vs. undisturbed areas, as well as nest success in the summers of 2016 and 2017 at two field camps in the Fish Creek watershed, NPR-A.
Capture Data from Molting Steller's Eiders (Polysticta stelleri) at Izembek and Nelson Lagoons, Alaska Capture Data from Molting Steller's Eiders (Polysticta stelleri) at Izembek and Nelson Lagoons, Alaska
These data are in one table and contain information on the location, age, sex, and measurements (mass, ninth primary, culmen, and total tarsus) of Steller's Eiders during the flightless molt period. Captures took place at Izembek and Nelson Lagoons on the north side of the Alaska Peninsula.
Walrus Haulout Outlines Apparent from Aerial Survey Images Collected Near Point Lay, Alaska Walrus Haulout Outlines Apparent from Aerial Survey Images Collected Near Point Lay, Alaska
This dataset provides walrus haulout group outlines in a shapefile format and haulout area sizes in csv format. These data are based on visual interpretation of imagery from aerial surveys by a small uncrewed aerial system (sUAS) operated by the U.S. Geological Survey Alaska Science Center, over large groups of walruses resting onshore near Point Lay, Alaska during September of 2024 and...
Fish Nutritional Quality, Biomarkers, Communities, and Environmental Data from the Nearshore Beaufort Sea, Alaska, 2021-2023 Fish Nutritional Quality, Biomarkers, Communities, and Environmental Data from the Nearshore Beaufort Sea, Alaska, 2021-2023
This data release contains information derived from fishing efforts and sampled fish from the nearshore Beaufort Sea, Alaska, 2021-2023, as part of a study investigating red-throated loon productivity and diet. The datasets include six tables comprising 1) catch per unit effort (CPUE) data, 2) field-measured lengths of fish (mm), 3) the energy density (kJ/g) and whole-body energy (kJ) of...
Walrus Haulout Aerial Survey Data Near Point Lay, Alaska Walrus Haulout Aerial Survey Data Near Point Lay, Alaska
This dataset consists of the complete set of processed aerial imagery and survey data from walrus haulouts collected by unoccupied aerial system (UAS) surveys near Pt. Lay, Alaska, during the autumn 2024 and 2025. The data include georeferenced optical three band (red, green, blue) aerial images and orthoimages derived from those aerial images through the standardized structure from...
Data on the Deterioration of Different Types of Attachment Hardware on Sham Satellite Radio Collars Data on the Deterioration of Different Types of Attachment Hardware on Sham Satellite Radio Collars
Polar bears (Ursus maritimus) are difficult to study because of logistical challenges. Satellite radio collars are an excellent tool for efficiently collecting information on the distribution and habitat use of polar bears because they can be deployed for multiple years. Radio collars can be constructed using materials and devices that result in the collar falling off an animal so that...
Wildlife Health and Genetics
Wildlife Health and Genetics
Filter Total Items: 109
Genetic Data for Evaluating Morphology Use to Identify Hunter-Harvested Geese Genetic Data for Evaluating Morphology Use to Identify Hunter-Harvested Geese
This data release contains one table of genetic data (mitochondrial haplotypes and nuclear microsatellite genotypes) used to evaluate utility of two morphological measures (culmen length and plumage color) to correctly identify groups of hunter-harvested dusky (Branta canadensis occidentalis) and dusky-like Canada geese on wintering grounds within the Pacific Flyway of North America...
Data for Investigation of Egg Mortality in a Louisiana Population of Endangered Whooping Cranes Data for Investigation of Egg Mortality in a Louisiana Population of Endangered Whooping Cranes
This data set describes the genomic bacterial analysis of swabs and tissues collected from whooping cranes in Louisiana. The data includes targeted analysis from quantitative PCR for bacterial pathogens.
Genetic Data Used to Develop a Genotyping-in-Thousands by Sequencing (GT-seq) Panel for Identifying Individuals and Estimating Relatedness in Alaska Black Bears (Ursus americanus) Genetic Data Used to Develop a Genotyping-in-Thousands by Sequencing (GT-seq) Panel for Identifying Individuals and Estimating Relatedness in Alaska Black Bears (Ursus americanus)
This data package includes genotype data for two independent sets of American black bear (Ursus americanus) samples. The first set of samples was collected from 85 adult bears harvested by permitted hunters in southcentral Alaska from 1994-2019; we hereafter refer to these as "hunter-harvested" samples. These hunter-harvested samples were genotyped with restriction site-associated...
Heat Shock Protein 70 Abundance in Pacific Salmon Heat Shock Protein 70 Abundance in Pacific Salmon
This data release contains one table with heat shock protein 70 (HSP70) abundance measurements of Pacific salmon (Oncorhynchus spp.) muscle samples, collected from fish occupying freshwater in various Alaskan watersheds. Water temperatures associated with a sampled fish are also included in the dataset, when available.
Southern Beaufort Sea Polar Bear Hemoglobin A1c Data Southern Beaufort Sea Polar Bear Hemoglobin A1c Data
This dataset is one table with demographic, morphometric, and blood analyte measurements from whole blood and serum samples taken from a subset of polar bears sampled in Alaska's southern Beaufort Sea during 1989-2012. The measured blood analytes include: blood urea nitrogen, creatinine, glucose, total protein, hemoglobin, red blood cell count, packed cell volume, and hemoglobin A1c...
Diet Data from Fecal DNA Metabarcoding and Video Camera Collars from the Porcupine Caribou Herd, Alaska and Yukon Diet Data from Fecal DNA Metabarcoding and Video Camera Collars from the Porcupine Caribou Herd, Alaska and Yukon
These diet data were collected from the Porcupine caribou herd in northern Alaska and Yukon in summer 2021 during 4 periods: calving (occasion 1), post-calving (occasion 2), mosquito harassment (occasion 3), and mid-summer (occasion 4). Diet data was determined by two distinct techniques: DNA metabarcoding data from fecal pellets and video data from camera collars deployed on adult...
Data on Exposure of Wild Mammals Inhabiting Alaska to H5N1 Influenza A Viruses Data on Exposure of Wild Mammals Inhabiting Alaska to H5N1 Influenza A Viruses
This data set describes serological data collected from mammals in Alaska and seropositivity to influenza A, clade 2.3.4.4b H5 highly pathogenic avian influenza (HPAI), North American lineage H5 low pathogenic avian influenza (LPAI), and N1 antigens.
Pathogen Exposure Data for Chukchi Sea Polar Bears 1988-1994 and 2008-2017 Pathogen Exposure Data for Chukchi Sea Polar Bears 1988-1994 and 2008-2017
This dataset is one table with results of tests to determine exposure of Chukchi Sea polar bears to a suite of pathogens. Results are serological tests for antibodies and tests of fecal samples for presence of parasites. Serologic assays were conducted for Toxoplasma gondii, Neospora caninum, Francisella tularensis, Coxiella burnetii, Leptospira spp., Brucella canis, Brucella abortus...
Data for Genomic Characterization of Highly Pathogenic H5 Avian Influenza Viruses from Alaska in 2022 Data for Genomic Characterization of Highly Pathogenic H5 Avian Influenza Viruses from Alaska in 2022
This data set describes genomic sequence information from 2022 used to infer spatiotemporal trends pertaining to the introductions of highly pathogenic H5N1 avian influenza viruses into Alaska and spread among wild birds, backyard poultry, and mammals.
Data Associated with a Multi-Stage Captive Trial Assessing the Effects of Saxitoxin Ingestion by Common Murres (Uria aalge) Data Associated with a Multi-Stage Captive Trial Assessing the Effects of Saxitoxin Ingestion by Common Murres (Uria aalge)
This data set is comprised of results associated with a multi-stage experimental study to determine the effects of paralytic shellfish toxin ingestion by Common Murres (Uria aalge) conducted in 2021-2022. Data is comprised of eight spreadsheets covering each phase of the study including specific bird dosing data, behavioral observation data, foraging trial data, and tissue testing...
Environmental Health and eDNA
Environmental Health and eDNA
Habitat and Landscape Change
Habitat and Landscape Change
Filter Total Items: 39
Data from Sampling for Small-Scale Geographic Variation in Salinity Along the Lower Kashunuk River, Yukon-Kuskokwim Delta, Alaska, 1993 Data from Sampling for Small-Scale Geographic Variation in Salinity Along the Lower Kashunuk River, Yukon-Kuskokwim Delta, Alaska, 1993
This dataset provides salinity measurements collected from water bodies along 17 east-west transects in along the lower Kashunuk River, Yukon-Kuskokwim Delta National Wildlife Refuge, 25 June - 30 July 1993.
Low-Altitude Photographic Transects of the Arctic Network of National Park Units and Selawik National Wildlife Refuge, Alaska, July 2013 Low-Altitude Photographic Transects of the Arctic Network of National Park Units and Selawik National Wildlife Refuge, Alaska, July 2013
This data release includes 5 child items with photos and videos taken during low altitude photo survey transects in northwest Alaska, July 2013. Three flight transects were conducted from small aircraft over the National Park Service's Arctic Network (ARCN; Bering Land Bridge National Preserve, Cape Krusenstern National Monument, Gates of the Arctic National Park and Preserve, Kobuk...
Avian Habitat Data; Seward Peninsula, Alaska, 2012 Avian Habitat Data; Seward Peninsula, Alaska, 2012
This data package contains two tables with habitat measurements from each sampling point used in avian point-transect surveys on the Seward Peninsula in 2012 and the locations of those sites. Measurements include percent cover and canopy height of alder (Alnus spp.), dwarf birch (Betula spp.), ericaceous shrubs (e.g., Empetrum, Vaccinium spp.), herbaceous, lichen (e.g., Cladonia spp.)...
Soil and Vegetation Data from Lake-Margin Wetlands in the Yukon Flats National Wildlife Refuge Soil and Vegetation Data from Lake-Margin Wetlands in the Yukon Flats National Wildlife Refuge
This data release includes six child items of soil and vegetation data from lake margin soils of the Yukon Flats National Wildlife Refuge, Alaska. Data includes multiple lakes that are defined as either stable or drying. Lake margin vegetation communities include graminoid, shrub, and forest. Sols are separated into organic and mineral layers. Microbial data includes different...
Sampling Data for Eelgrass (Zostera marina) in Norma Bay, Izembek Lagoon, Alaska, 1987 Sampling Data for Eelgrass (Zostera marina) in Norma Bay, Izembek Lagoon, Alaska, 1987
These data are related to surveys of eelgrass beds in Norma Bay, Izembek Lagoon, Alaska. The table provides eelgrass shoot lengths and density measurements from sampling in September 1987.
Aerial Images of Alaska's Arctic Coastal Plain, 1974-1979 Aerial Images of Alaska's Arctic Coastal Plain, 1974-1979
This dataset is comprised of 11 geo-referenced aerial images of two study areas (Teshekpuk Lake Special Area and the Chipp River) in the National Petroleum Reserve - Alaska (NPRA) on Alaska's Arctic Coastal Plain. The images are from aerial photo survey flown by NASA in 1974, 1977, 1979 and obtained from the Earth Resources Observation and Science (EROS) Center using the USGS...
Aerial Images of Alaska's Arctic Coastal Plain, 1948-1949 Aerial Images of Alaska's Arctic Coastal Plain, 1948-1949
This dataset is comprised of 35 geo-referenced aerial images of four study areas (Teshekpuk Lake Special Area, Chipp River, Colville River Delta, and Dalton Highway Corridor) on Alaska's Arctic Coastal Plain. The images are from aerial photo surveys flown in 1948-1949 and obtained from the Earth Resources Observation and Science (EROS) Center using the USGS EarthExplorer website. The...
Aerial Image of Alaska's Arctic Coastal Plain, 1955 Aerial Image of Alaska's Arctic Coastal Plain, 1955
This dataset is comprised of one geo-referenced aerial image from the National Petroleum Reserve - Alaska (NPRA) on Alaska's Arctic Coastal Plain taken on 21 June 1955 by the U.S. Air Force and obtained from the Earth Resources Observation and Science (EROS) Center using the USGS EarthExplorer website in 2013. The image represents a historical snapshot of the landscape from that time.
Intertidal Temperature Data from Kachemak Bay, Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park Intertidal Temperature Data from Kachemak Bay, Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park
These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program. This dataset consists of date, time, and temperature measurements from intertidal rocky sampling sites, including predicted tide height at the time of the reading, which is used to distinguish air from water temperature readings. The data are provided as comma separated values (.csv) files derived from data...
Mapping Data of Eelgrass (Zostera marina) Distribution, Alaska and Baja California, Mexico Mapping Data of Eelgrass (Zostera marina) Distribution, Alaska and Baja California, Mexico
This data release includes 4 child items with geospatial datasets that characterize the distribution of eelgrass (Zostera marina) and seaweeds in waters of southwestern Alaska and Baja California, Mexico. Child Item 1: "Mapping Data of Eelgrass (Zostera marina) Distribution, Alaska Peninsula and Nunivak Island" Child Item 2: "Mapping Data of Eelgrass (Zostera marina) Distribution, Togiak...
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: 87
Waterfowl Census Data during Fall Migration at Nanvak Bay, Togiak National Wildlife Refuge, Alaska, 1992 Waterfowl Census Data during Fall Migration at Nanvak Bay, Togiak National Wildlife Refuge, Alaska, 1992
Waterfowl were observed staging at Nanvak Bay, Togiak National Wildlife Refuge in southwest Alaska between 31 August and 27 September 1992. This data release contains five tables including 1) aerial surveys, 2) band resights for Black Brant (Branta bernicla nigricans), 3) Black Brant age ratios, 4) bird migration observations, and 5) taxonomy table for observed birds.
Emperor Goose (Anser canagicus) Mark-recapture and Resight Encounter History from the Yukon-Kuskokwim Delta, Alaska, 1994-2017 Emperor Goose (Anser canagicus) Mark-recapture and Resight Encounter History from the Yukon-Kuskokwim Delta, Alaska, 1994-2017
This dataset is in one table with mark-recapture and resight data of Emperor Geese marked with plastic color bands on the Yukon-Kuskokwim Delta in Alaska, 1994-2017.
Movements of Black Brant Tagged While Molting in the National Petroleum Reserve - Alaska Movements of Black Brant Tagged While Molting in the National Petroleum Reserve - Alaska
This data release contains five tables of information related to the movement patterns of Black Brant equipped with high-frequency GPS tags: 1) brant banding records, 2) helicopter flight routes for experimental disturbance trials, 3) Brant movement data from Milsar tags deployed in 2023, 4) Brant movement data from Milsar tags deployed in 2024, and 5) Brant movement data from Ornitela...
Movement Metrics of Adult Female Grizzly Bears and Polar Bears Used to Identify Cub Presence with Machine Learning Movement Metrics of Adult Female Grizzly Bears and Polar Bears Used to Identify Cub Presence with Machine Learning
These data represent movement metrics of adult female grizzly bears and polar bears with and without cubs-of-the-year at seven temporal scales after den departure. Grizzly bear data were collected in the Greater Yellowstone Ecosystem during 2000–2021 and in the Northern Continental Divide Ecosystem during 2003–2022. Polar bear data were collected in the Southern Beaufort Sea during 1986...
GPS Tracking Data for Caribou (Rangifer tarandus granti) from the Denali Herd, Alaska, 2010-2018 GPS Tracking Data for Caribou (Rangifer tarandus granti) from the Denali Herd, Alaska, 2010-2018
GPS collar location data were collected as part of a long-term study on caribou (Rangifer tarandus granti) in the Denali herd of Alaska. Collars were deployed on adult (greater than or equal to 2 years) female caribou from 2010-2013, and then refurbished and redeployed on adult (greater than or equal to 4 years) male caribou from 2014-2018. The collars were manufactured by Telonics (TGW...
GPS Tracking Data for the Nelchina Herd Caribou (Rangifer tarandus granti), Alaska, 1999-2002 GPS Tracking Data for the Nelchina Herd Caribou (Rangifer tarandus granti), Alaska, 1999-2002
These data were part of a tracking study of adult female caribou from the Nelchina Herd in Alaska. The dataset is comprised of two comma separated values (.csv) files. Data includes: 1) processed (i.e., erroneous locations removed) GPS locations for caribou, received once per 7 hours (October 1999 to October 2002), and 2) spatial, temporal, and biological attributes of the female caribou...
Comparison of Acoustic Recorders and Field Observers for Monitoring Tundra Bird Communities in Northwestern Alaska Comparison of Acoustic Recorders and Field Observers for Monitoring Tundra Bird Communities in Northwestern Alaska
Acoustic recorders can detect the presence of birds and these detections may be used for the purpose of population abundance or estimation. This monitoring project compared the abundance of tundra-breeding birds detected through both acoustic monitoring and observational surveys. The data package is comprised of four tables: (1) habitat type, including vegetation height at sites where...
Emperor Goose (Anser canagicus) Nest Visit, Fate, and Dispersal Distances from the Yukon-Kuskokwim Delta, Alaska, 2000-2017 Emperor Goose (Anser canagicus) Nest Visit, Fate, and Dispersal Distances from the Yukon-Kuskokwim Delta, Alaska, 2000-2017
These data are in two tables: 1) table relating to emperor goose nest visit, nest fate, and nest dispersal distances on the Yukon-Kuskokwim Delta in Alaska, 2000-2017; 2) table with means and standard deviations for posterior distributions of predicted nest-age and year specific daily nest survival probabilities for emperor geese derived from estimates reported by Thompson et al. (2023)...
Aerial Surveys of Rock Sandpiper During Winter in upper Cook Inlet, Alaska, 1997-2012 Aerial Surveys of Rock Sandpiper During Winter in upper Cook Inlet, Alaska, 1997-2012
This data release consists of one table of multi-year observations of Rock Sandpipers (Calidris ptilocnemis) and aerial photographs of Rock Sandpiper flocks at sites in upper Cook Inlet, Alaska, 1997-2014.
Nesting Period Data for Black Brant (Branta bernicla nigricans) in Alaska Nesting Period Data for Black Brant (Branta bernicla nigricans) in Alaska
This data package contains one table with nest initiation and end dates and clutch sizes from Black Brant (Branta bernicla nigricans) at two breeding colonies in Alaska. Data include nesting period determined by either nest visits or light-level data recorded by geolocators attached tarsal bands.
Aquatic Ecosystems
Aquatic Ecosystems
Filter Total Items: 152
Walrus Counts Apparent from Aerial Survey Images Collected Near Point Lay, Alaska Walrus Counts Apparent from Aerial Survey Images Collected Near Point Lay, Alaska
This dataset provides walrus counts in 10 m by 10 m square grid cells randomly selected from a standard set of grid cells established for the study area and that intersected with previously published walrus herd outlines and overlain on aerial survey imagery. Results are provided as geospatial polygons saved in the shapefile format. These data are based on visual interpretation of...
Data from Migratory Bird Aerial Surveys and Habitat, Nest Success, and Genetic Samples from Spectacled Eiders (Somateria fischeri) on the Indigirka River Delta, Russia Data from Migratory Bird Aerial Surveys and Habitat, Nest Success, and Genetic Samples from Spectacled Eiders (Somateria fischeri) on the Indigirka River Delta, Russia
This data release contains five spreadsheets of information from aerial surveys of the Indigirka River Delta, Russia, in June of 1993 and 1994, data on habitats where nests of Spectacled Eiders (Somateria fischeri) and other species of waterfowl were observed from 1993 to 1995, and genotypic data from feathers collected from eider nests to determine inter-annual rates of return by...
Southern Beaufort Sea Polar Bear Mark Recapture Data, 2000-2023 Southern Beaufort Sea Polar Bear Mark Recapture Data, 2000-2023
This dataset is one table with data collected and derived from polar bears sampled in Alaska from the Southern Beaufort Sea subpopulation during 2000-2023. Collected data includes individual identity, location of observation, observation type, estimated birth year, and demographic information. Data were collected from polar bears that were captured, remotely sampled using biopsy darts...
Walrus Haulout Audio Recordings Near Point Lay 2024 Walrus Haulout Audio Recordings Near Point Lay 2024
This dataset consists of a complete set of audio recordings collected near a large walrus haulout at Point Lay, Alaska, during September of 2024. The recordings were collected using the Song Meter Mini 2 (Wildlife Acoustics, Inc., Maynard, MA) at two sites, one within 150 m of a large walrus herd resting on shore and one placed more than 4 km to the south of the herd directly under the...
Bureau of Land Management Data on Breeding Ecology and Behavioral Responses of Loons to Oilfield Development Activities in the Fish Creek Watershed, National Petroleum Reserve in Alaska, 2016 and 2017 Bureau of Land Management Data on Breeding Ecology and Behavioral Responses of Loons to Oilfield Development Activities in the Fish Creek Watershed, National Petroleum Reserve in Alaska, 2016 and 2017
These data consist of the behavioral responses of Pacific and Yellow-billed Loons to helicopter overflights and ground-based human activity in disturbed vs. undisturbed areas, as well as nest success in the summers of 2016 and 2017 at two field camps in the Fish Creek watershed, NPR-A.
Capture Data from Molting Steller's Eiders (Polysticta stelleri) at Izembek and Nelson Lagoons, Alaska Capture Data from Molting Steller's Eiders (Polysticta stelleri) at Izembek and Nelson Lagoons, Alaska
These data are in one table and contain information on the location, age, sex, and measurements (mass, ninth primary, culmen, and total tarsus) of Steller's Eiders during the flightless molt period. Captures took place at Izembek and Nelson Lagoons on the north side of the Alaska Peninsula.
Walrus Haulout Outlines Apparent from Aerial Survey Images Collected Near Point Lay, Alaska Walrus Haulout Outlines Apparent from Aerial Survey Images Collected Near Point Lay, Alaska
This dataset provides walrus haulout group outlines in a shapefile format and haulout area sizes in csv format. These data are based on visual interpretation of imagery from aerial surveys by a small uncrewed aerial system (sUAS) operated by the U.S. Geological Survey Alaska Science Center, over large groups of walruses resting onshore near Point Lay, Alaska during September of 2024 and...
Fish Nutritional Quality, Biomarkers, Communities, and Environmental Data from the Nearshore Beaufort Sea, Alaska, 2021-2023 Fish Nutritional Quality, Biomarkers, Communities, and Environmental Data from the Nearshore Beaufort Sea, Alaska, 2021-2023
This data release contains information derived from fishing efforts and sampled fish from the nearshore Beaufort Sea, Alaska, 2021-2023, as part of a study investigating red-throated loon productivity and diet. The datasets include six tables comprising 1) catch per unit effort (CPUE) data, 2) field-measured lengths of fish (mm), 3) the energy density (kJ/g) and whole-body energy (kJ) of...
Walrus Haulout Aerial Survey Data Near Point Lay, Alaska Walrus Haulout Aerial Survey Data Near Point Lay, Alaska
This dataset consists of the complete set of processed aerial imagery and survey data from walrus haulouts collected by unoccupied aerial system (UAS) surveys near Pt. Lay, Alaska, during the autumn 2024 and 2025. The data include georeferenced optical three band (red, green, blue) aerial images and orthoimages derived from those aerial images through the standardized structure from...
Data on the Deterioration of Different Types of Attachment Hardware on Sham Satellite Radio Collars Data on the Deterioration of Different Types of Attachment Hardware on Sham Satellite Radio Collars
Polar bears (Ursus maritimus) are difficult to study because of logistical challenges. Satellite radio collars are an excellent tool for efficiently collecting information on the distribution and habitat use of polar bears because they can be deployed for multiple years. Radio collars can be constructed using materials and devices that result in the collar falling off an animal so that...
Wildlife Health and Genetics
Wildlife Health and Genetics
Filter Total Items: 109
Genetic Data for Evaluating Morphology Use to Identify Hunter-Harvested Geese Genetic Data for Evaluating Morphology Use to Identify Hunter-Harvested Geese
This data release contains one table of genetic data (mitochondrial haplotypes and nuclear microsatellite genotypes) used to evaluate utility of two morphological measures (culmen length and plumage color) to correctly identify groups of hunter-harvested dusky (Branta canadensis occidentalis) and dusky-like Canada geese on wintering grounds within the Pacific Flyway of North America...
Data for Investigation of Egg Mortality in a Louisiana Population of Endangered Whooping Cranes Data for Investigation of Egg Mortality in a Louisiana Population of Endangered Whooping Cranes
This data set describes the genomic bacterial analysis of swabs and tissues collected from whooping cranes in Louisiana. The data includes targeted analysis from quantitative PCR for bacterial pathogens.
Genetic Data Used to Develop a Genotyping-in-Thousands by Sequencing (GT-seq) Panel for Identifying Individuals and Estimating Relatedness in Alaska Black Bears (Ursus americanus) Genetic Data Used to Develop a Genotyping-in-Thousands by Sequencing (GT-seq) Panel for Identifying Individuals and Estimating Relatedness in Alaska Black Bears (Ursus americanus)
This data package includes genotype data for two independent sets of American black bear (Ursus americanus) samples. The first set of samples was collected from 85 adult bears harvested by permitted hunters in southcentral Alaska from 1994-2019; we hereafter refer to these as "hunter-harvested" samples. These hunter-harvested samples were genotyped with restriction site-associated...
Heat Shock Protein 70 Abundance in Pacific Salmon Heat Shock Protein 70 Abundance in Pacific Salmon
This data release contains one table with heat shock protein 70 (HSP70) abundance measurements of Pacific salmon (Oncorhynchus spp.) muscle samples, collected from fish occupying freshwater in various Alaskan watersheds. Water temperatures associated with a sampled fish are also included in the dataset, when available.
Southern Beaufort Sea Polar Bear Hemoglobin A1c Data Southern Beaufort Sea Polar Bear Hemoglobin A1c Data
This dataset is one table with demographic, morphometric, and blood analyte measurements from whole blood and serum samples taken from a subset of polar bears sampled in Alaska's southern Beaufort Sea during 1989-2012. The measured blood analytes include: blood urea nitrogen, creatinine, glucose, total protein, hemoglobin, red blood cell count, packed cell volume, and hemoglobin A1c...
Diet Data from Fecal DNA Metabarcoding and Video Camera Collars from the Porcupine Caribou Herd, Alaska and Yukon Diet Data from Fecal DNA Metabarcoding and Video Camera Collars from the Porcupine Caribou Herd, Alaska and Yukon
These diet data were collected from the Porcupine caribou herd in northern Alaska and Yukon in summer 2021 during 4 periods: calving (occasion 1), post-calving (occasion 2), mosquito harassment (occasion 3), and mid-summer (occasion 4). Diet data was determined by two distinct techniques: DNA metabarcoding data from fecal pellets and video data from camera collars deployed on adult...
Data on Exposure of Wild Mammals Inhabiting Alaska to H5N1 Influenza A Viruses Data on Exposure of Wild Mammals Inhabiting Alaska to H5N1 Influenza A Viruses
This data set describes serological data collected from mammals in Alaska and seropositivity to influenza A, clade 2.3.4.4b H5 highly pathogenic avian influenza (HPAI), North American lineage H5 low pathogenic avian influenza (LPAI), and N1 antigens.
Pathogen Exposure Data for Chukchi Sea Polar Bears 1988-1994 and 2008-2017 Pathogen Exposure Data for Chukchi Sea Polar Bears 1988-1994 and 2008-2017
This dataset is one table with results of tests to determine exposure of Chukchi Sea polar bears to a suite of pathogens. Results are serological tests for antibodies and tests of fecal samples for presence of parasites. Serologic assays were conducted for Toxoplasma gondii, Neospora caninum, Francisella tularensis, Coxiella burnetii, Leptospira spp., Brucella canis, Brucella abortus...
Data for Genomic Characterization of Highly Pathogenic H5 Avian Influenza Viruses from Alaska in 2022 Data for Genomic Characterization of Highly Pathogenic H5 Avian Influenza Viruses from Alaska in 2022
This data set describes genomic sequence information from 2022 used to infer spatiotemporal trends pertaining to the introductions of highly pathogenic H5N1 avian influenza viruses into Alaska and spread among wild birds, backyard poultry, and mammals.
Data Associated with a Multi-Stage Captive Trial Assessing the Effects of Saxitoxin Ingestion by Common Murres (Uria aalge) Data Associated with a Multi-Stage Captive Trial Assessing the Effects of Saxitoxin Ingestion by Common Murres (Uria aalge)
This data set is comprised of results associated with a multi-stage experimental study to determine the effects of paralytic shellfish toxin ingestion by Common Murres (Uria aalge) conducted in 2021-2022. Data is comprised of eight spreadsheets covering each phase of the study including specific bird dosing data, behavioral observation data, foraging trial data, and tissue testing...
Environmental Health and eDNA
Environmental Health and eDNA
Habitat and Landscape Change
Habitat and Landscape Change
Filter Total Items: 39
Data from Sampling for Small-Scale Geographic Variation in Salinity Along the Lower Kashunuk River, Yukon-Kuskokwim Delta, Alaska, 1993 Data from Sampling for Small-Scale Geographic Variation in Salinity Along the Lower Kashunuk River, Yukon-Kuskokwim Delta, Alaska, 1993
This dataset provides salinity measurements collected from water bodies along 17 east-west transects in along the lower Kashunuk River, Yukon-Kuskokwim Delta National Wildlife Refuge, 25 June - 30 July 1993.
Low-Altitude Photographic Transects of the Arctic Network of National Park Units and Selawik National Wildlife Refuge, Alaska, July 2013 Low-Altitude Photographic Transects of the Arctic Network of National Park Units and Selawik National Wildlife Refuge, Alaska, July 2013
This data release includes 5 child items with photos and videos taken during low altitude photo survey transects in northwest Alaska, July 2013. Three flight transects were conducted from small aircraft over the National Park Service's Arctic Network (ARCN; Bering Land Bridge National Preserve, Cape Krusenstern National Monument, Gates of the Arctic National Park and Preserve, Kobuk...
Avian Habitat Data; Seward Peninsula, Alaska, 2012 Avian Habitat Data; Seward Peninsula, Alaska, 2012
This data package contains two tables with habitat measurements from each sampling point used in avian point-transect surveys on the Seward Peninsula in 2012 and the locations of those sites. Measurements include percent cover and canopy height of alder (Alnus spp.), dwarf birch (Betula spp.), ericaceous shrubs (e.g., Empetrum, Vaccinium spp.), herbaceous, lichen (e.g., Cladonia spp.)...
Soil and Vegetation Data from Lake-Margin Wetlands in the Yukon Flats National Wildlife Refuge Soil and Vegetation Data from Lake-Margin Wetlands in the Yukon Flats National Wildlife Refuge
This data release includes six child items of soil and vegetation data from lake margin soils of the Yukon Flats National Wildlife Refuge, Alaska. Data includes multiple lakes that are defined as either stable or drying. Lake margin vegetation communities include graminoid, shrub, and forest. Sols are separated into organic and mineral layers. Microbial data includes different...
Sampling Data for Eelgrass (Zostera marina) in Norma Bay, Izembek Lagoon, Alaska, 1987 Sampling Data for Eelgrass (Zostera marina) in Norma Bay, Izembek Lagoon, Alaska, 1987
These data are related to surveys of eelgrass beds in Norma Bay, Izembek Lagoon, Alaska. The table provides eelgrass shoot lengths and density measurements from sampling in September 1987.
Aerial Images of Alaska's Arctic Coastal Plain, 1974-1979 Aerial Images of Alaska's Arctic Coastal Plain, 1974-1979
This dataset is comprised of 11 geo-referenced aerial images of two study areas (Teshekpuk Lake Special Area and the Chipp River) in the National Petroleum Reserve - Alaska (NPRA) on Alaska's Arctic Coastal Plain. The images are from aerial photo survey flown by NASA in 1974, 1977, 1979 and obtained from the Earth Resources Observation and Science (EROS) Center using the USGS...
Aerial Images of Alaska's Arctic Coastal Plain, 1948-1949 Aerial Images of Alaska's Arctic Coastal Plain, 1948-1949
This dataset is comprised of 35 geo-referenced aerial images of four study areas (Teshekpuk Lake Special Area, Chipp River, Colville River Delta, and Dalton Highway Corridor) on Alaska's Arctic Coastal Plain. The images are from aerial photo surveys flown in 1948-1949 and obtained from the Earth Resources Observation and Science (EROS) Center using the USGS EarthExplorer website. The...
Aerial Image of Alaska's Arctic Coastal Plain, 1955 Aerial Image of Alaska's Arctic Coastal Plain, 1955
This dataset is comprised of one geo-referenced aerial image from the National Petroleum Reserve - Alaska (NPRA) on Alaska's Arctic Coastal Plain taken on 21 June 1955 by the U.S. Air Force and obtained from the Earth Resources Observation and Science (EROS) Center using the USGS EarthExplorer website in 2013. The image represents a historical snapshot of the landscape from that time.
Intertidal Temperature Data from Kachemak Bay, Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park Intertidal Temperature Data from Kachemak Bay, Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park
These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program. This dataset consists of date, time, and temperature measurements from intertidal rocky sampling sites, including predicted tide height at the time of the reading, which is used to distinguish air from water temperature readings. The data are provided as comma separated values (.csv) files derived from data...
Mapping Data of Eelgrass (Zostera marina) Distribution, Alaska and Baja California, Mexico Mapping Data of Eelgrass (Zostera marina) Distribution, Alaska and Baja California, Mexico
This data release includes 4 child items with geospatial datasets that characterize the distribution of eelgrass (Zostera marina) and seaweeds in waters of southwestern Alaska and Baja California, Mexico. Child Item 1: "Mapping Data of Eelgrass (Zostera marina) Distribution, Alaska Peninsula and Nunivak Island" Child Item 2: "Mapping Data of Eelgrass (Zostera marina) Distribution, Togiak...
Ecosystem Analytics
Ecosystem Analytics