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This dataset contains taxonomic information, counts, and lengths of macroinvertebrates collected from rivers in northwest Alaska using drift and kick nets during summer and fall 2015-2019. Version History: First release: February 2024 Revised: August 2024 (ver. 1.1) Revised: December2024 (ver. 1.2)
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This data are a single table of nest records from a multi-year study of Pacific Common Eider (Somateria mollissima v-nigrum) biology that was conducted along the lower Kashunuk River, Kigigak Island, and the mouth of the Tutakoke River on the Yukon-Kuskokwim Delta from 1991-2004.
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This is a child item of the USGS Data Release: https://doi.org/10.5066/P9QF8RR5 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.
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This is a child item of the USGS Data Release: https://doi.org/10.5066/P9QF8RR5 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.
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This is a child item of the USGS Data Release: https://doi.org/10.5066/P9QF8RR5 Total and organic carbon values from soil samples taken from the Yukon River Basin, Alaska. These samples were used to create a relationship between total carbon and organic carbon for samples which were only run for total carbon.
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This data package includes 2 child items with data from Pacific Black Brant (Branta bernicla nigricans) during winter and migration periods. Child Item 1: "Body mass, Morphological Measurements, Flock Counts, and Age-Ratios from Black Brant Overwintering in Three Lagoons Along the Baja California Peninsula, Mexico". The data include: (1) body mass and morphological measurements from sport hunter harvested brant, and (2) census counts of brant in Bahia de San Quintin, (3) counts for flock age ratio determination, and (4) behavior. Child Item 2: "Black Brant (Branta bernicla nigricans) Radio Detection and Migration Timing Alaska to Mexico". Data from brant tagged with VHF radio transmitters in July 1999 on the Yukon...
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Fragment data from 11 nuclear microsatellite loci and sequence data from the mitochondrial cytochrome b gene were gathered from Arctic cod (Boreogadus saida) in the Beaufort and Chukchi seas. Mitogenomic analyses of Arctic cod and three other co-distributed gadoids (Polar cod [Arctogadus glacialis], Saffron cod [Eleginus gracilis], Walleye Pollock [Gadus chalcogrammus]) were also completed. Transcriptomic analyses of Arctic cod were used to identify genes associated with environmental perturbations. Genome-wide scans using RAD-Seq of Arctic cod and the co-distributed Polar Cod were collected.
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This data set describes nuclear microsatellite genotypes derived from six autosomal loci (AgCA222, Age7.1JT, BV13, BV20, NVH206, NVH195-2) in Cooper's Hawks. Samples originated from blood samples collected from live trapped birds. Version History: First release: December 2020 Revised: February 2022 (ver. 2.0)
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These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program, nearshore monitoring component. The dataset has one comma separated values (.csv) table with estimates of eelgrass (Zostera marina) percent cover. Eelgrass cover was estimated from sonar and video drop cameras deployed from boats following prescribed survey transects.
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This is a child item of the USGS Data Release: https://doi.org/10.5066/P961LWWE 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. Version History: First release: May 2021 Revised: June 2021 (ver. 1.1) Revised: June 2022 (ver. 2.0) Revised: January 2024 (ver. 3.0)
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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.
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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...
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This is a child item of the USGS Data Release: https://doi.org/10.5066/F7513WCB. These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program, nearshore monitoring component. The dataset has five comma separated values (.csv) file exported from a Microsoft Access relational database. The data consist of percent cover and point contact data from algae and invertebrates at intertidal rocky substrate sampling sites. Tables include: 1) intertidal cover, 2) intertidal percent cover, 3) intertidal top layer percent cover, 4) intertidal substrate percent cover, and 5) taxonomic classification table. Version History: First release: September 2022 Revised: October 2023 (ver. 2.0) Revised: October 2024...
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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.
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This dataset contains the growth index from annual growth bands in the shells of two bivalve clam species (Astarte borealis and Liocyma fluctuosa) captured in the Chukchi Sea, Alaska. The growth index is based on a measurement of the annual growth increment width that has been detrended for age-related differences in growth.
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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 the animal does not retain a non-functional collar indefinitely. However, the performance of "drop-off" materials and devices has been sub-optimal for many years. For example, collar release timer units (RTU), which cause the collar to detach from an animal at a pre-programmed point in time, can fail to function. Similarly, collar...
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This is a child item of the USGS Data Release: https://doi.org/10.5066/P9WEK4JI Provided here are two vector geospatial datasets that characterize the distribution of eelgrass (Zostera marina) and seaweeds in waters adjacent to Togiak National Wildlife Refuge, Alaska. These data were derived from: (1) aerial photo imagery acquired on five different summer days 2005-2013 and (2) satellite imagery (Ikonos-2 and Quickbird-2) acquired on five different summer days 2002-2004. Additionally, the ortho-rectified photomosaics of the aerial photographs used for analysis are provided.
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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 National Wildlife Refuge, Alaska" Child Item 3: "Mapping Data of Eelgrass (Zostera marina) Distribution, Baja California, Mexico" Child Item 4: "Habitat Classification Data of Five Bays Along the West Coast of Baja California, Mexico"
Categories: Data; Tags: Alaska, Alaska Peninsula National Wildlife Refuge, Angiosperms (flowering plants), Animal and plant census, Animals/Invertebrates, All tags...
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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 percentage, and other important conditions. The Seward Peninsula lake habitat study classification system provides lake specific information for a coastal peninsula area that will guide research and aid in the management of the natural environment.
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These data are serum urea nitrogen and creatinine levels for polar bears captured in the southern Beaufort Sea 1983-2016 and the Chukchi Sea 1987-1993 and 2008-2017. The dataset includes relevant information about the bears that were captured including the latitude and longitude of their capture location, capture date, age class and sex, the age and number of cubs accompanying an adult female, and whether the bear denned during the previous winter or exhibited signs of being engaged in mating behavior at the time of or just prior to capture. Version History: First release: October 2017 Revised: January 2021 (ver. 2.0)


map background search result map search result map Bering Land Bridge Lake Classification; Seward Peninsula, Alaska, 2012-2016 Gulf Watch Alaska Nearshore Component: Sea Otter Aerial Survey Data Katmai National Park and Preserve, 2008-2018 Genetic Data from Arctic, Polar, and Saffron Cod and Walleye Pollock, Alaska and Canada, 2011-2017 Pacific Common Eider (Somateria mollissima v-nigrum) Nest Records, Yukon-Kuskokwim Delta, Alaska, 1991-2004 Serum Urea and Creatinine Levels of Spring-Caught Polar Bears (Ursus maritimus) in the Southern Beaufort and Chukchi Seas Genetic Data from Cooper's Hawks (Accipiter cooperii), North America Child Item 2: Aboveground Net Primary Production Estimates from the Yukon Flats National Wildlife Refuge Child Item 3: Soil Properties of Lake-Margin Wetlands of the Yukon Flats National Wildlife Refuge Child Item 6: Total Carbon, Organic Carbon, and Nitrogen Data from a Subset of Soils Within the Yukon River Basin Data from Black Brant (Branta bernicla nigricans) Overwintering in Three Lagoons Along the Baja California Peninsula, Mexico Mapping Data of Eelgrass (Zostera marina) Distribution, Alaska and Baja California, Mexico Cryptosporidium and Giardia Occurrence Data in Wildlife from Arctic Alaska, 2012-2017 Estimated Post-Emergence Period for Denning Polar Bears of the Chukchi and Beaufort Seas Macroinvertebrates from Rivers in Northwest Alaska, 2015-2019 Child Item 6: Population Plots at Two Seabird Colonies in Lower Cook Inlet, Alaska Eelgrass (Zostera marina) Percent Cover Data from Katmai National Park and Preserve, Kenai Fjords National Park, and Prince William Sound, Alaska Child Item 3: Rocky Intertidal Invertebrate and Algae Cover from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park Child Item 2: Mapping Data of Eelgrass (Zostera marina) Distribution, Togiak National Wildlife Refuge, Alaska Data on the Deterioration of Different Types of Attachment Hardware on Sham Satellite Radio Collars Bivalve Shell Growth Indices, Chukchi Sea, Alaska, 1867-2015 Data on the Deterioration of Different Types of Attachment Hardware on Sham Satellite Radio Collars Child Item 6: Population Plots at Two Seabird Colonies in Lower Cook Inlet, Alaska Pacific Common Eider (Somateria mollissima v-nigrum) Nest Records, Yukon-Kuskokwim Delta, Alaska, 1991-2004 Child Item 2: Mapping Data of Eelgrass (Zostera marina) Distribution, Togiak National Wildlife Refuge, Alaska Gulf Watch Alaska Nearshore Component: Sea Otter Aerial Survey Data Katmai National Park and Preserve, 2008-2018 Bering Land Bridge Lake Classification; Seward Peninsula, Alaska, 2012-2016 Bivalve Shell Growth Indices, Chukchi Sea, Alaska, 1867-2015 Child Item 2: Aboveground Net Primary Production Estimates from the Yukon Flats National Wildlife Refuge Child Item 6: Total Carbon, Organic Carbon, and Nitrogen Data from a Subset of Soils Within the Yukon River Basin Child Item 3: Soil Properties of Lake-Margin Wetlands of the Yukon Flats National Wildlife Refuge Macroinvertebrates from Rivers in Northwest Alaska, 2015-2019 Eelgrass (Zostera marina) Percent Cover Data from Katmai National Park and Preserve, Kenai Fjords National Park, and Prince William Sound, Alaska Child Item 3: Rocky Intertidal Invertebrate and Algae Cover from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park Cryptosporidium and Giardia Occurrence Data in Wildlife from Arctic Alaska, 2012-2017 Genetic Data from Cooper's Hawks (Accipiter cooperii), North America Serum Urea and Creatinine Levels of Spring-Caught Polar Bears (Ursus maritimus) in the Southern Beaufort and Chukchi Seas Data from Black Brant (Branta bernicla nigricans) Overwintering in Three Lagoons Along the Baja California Peninsula, Mexico Mapping Data of Eelgrass (Zostera marina) Distribution, Alaska and Baja California, Mexico Estimated Post-Emergence Period for Denning Polar Bears of the Chukchi and Beaufort Seas Genetic Data from Arctic, Polar, and Saffron Cod and Walleye Pollock, Alaska and Canada, 2011-2017