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Selected Basin Boundaries for USGS Streamgages in Alaska through 2019 This dataset contains drainage basin boundaries for 253 U.S. Geological Survey (USGS) streamgages in Alaska that had at least 5 years of daily streamflow through September 30, 2017, three of which were delineated for alternate basin conditions. This compilation includes selected boundaries produced in 2014 (https://doi.org/10.5066/P143KNEJ). Additional basin boundaries were delineated from the streamgage location to the nearest USGS Watershed Boundary Dataset (WBD) HUC boundary and along HUC boundaries from that intersection to the basin headwaters. Streamgages selected for drainage basin delineation included streamgages in Alaska that met selection criteria for a statewide study of seasonal flow regimes (Curran... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Alaska, Discharge/flow, Hydrographic datasets, Hydrology, Hydrology, All tags... InlandWaters, Rivers/streams, Terrestrial Hydrosphere, USGS Science Data Catalog (SDC), Water Resources, Fewer tags Macroinvertebrates from Rivers in Northwest Alaska, 2015-2019 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. Categories: Data; Tags: Actinopterygii, Age composition, Alaska, Animals/Invertebrates, Animals/Invertebrates, All tags... Aquatic Biology, Aquatic Invertebrates, Aquatic ecosystems, Arachnida, Arctic, Arthropods, Arthropods, Biota, Bivalvia, Clitellata, Ecology, Entognatha, Environment, Freshwater ecosystems, Gastropoda, InlandWaters, Insecta, Macroinvertebrates, Nemata, Turbellaria, USGS Science Data Catalog (SDC), Water Quality, Fewer tags 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. Categories: Data; Tags: Alaska, Animals/Vertebrates, Arctic fox, Biota, Caribou, All tags... Cryptosporidium, Cryptosporidium, Disease detection, Disease reservoirs, Disease vectors, Endangered species, Environment, Giardia, Giardia, Health and disease, Indicator species, MERIFLUOR Cryptosporidium/Giardia direct immunofluorescent assay, Mammals, Migratory species, Odobenus rosmarus divergens, Pacific walrus, Parasitic diseases, Polar bear, Rangifer tarandus, Tundra ecosystems, USGS Science Data Catalog (SDC), Ursus maritimus, Vulpes lagopus, Wildlife, Wildlife Biology, Wildlife Disease, Wildlife disease, Fewer tags Rocky Intertidal Invertebrate and Algae Cover from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park 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 six 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, 5) taxonomic classification, and 6) Gulf Watch Alaska contributors. Version History: First release: September 2022 Revised: October 2023 (ver.... Categories: Data; Tags: Alaska, Alaska Peninsula, Algae, Algae, Animals/Invertebrates, All tags... Aquatic biology, Aquatic ecosystems, Biospheric indicators, Biota, Community ecology, Ecology, Ecosystem monitoring, Environment, Gulf of Alaska, Intertidal environments, Intertidal zone, Katmai National Park and Preserve, Kenai Fjords National Park, Macroinvertebrates, Marine ecosystems, Marine invertebrates, Mollusks, Nearshore ecology, Prince William Sound, USGS Science Data Catalog (SDC), Wildlife biology, Wildlife disease, Fewer tags Data from Black Brant (Branta bernicla nigricans) Overwintering in Three Lagoons Along the Baja California Peninsula, Mexico This data package includes two child items with data from Pacific Black Brant (Branta bernicla nigricans) during winter and migration periods. Child Item One: "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 Two: "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... Categories: Data; Tags: Alaska, Animal populations, Animals/Vertebrates, Bahia San Quintín, Baja California, All tags... Baja California Sur, Biota, Birds, Black Brant, Branta bernicla nigricans, Brent Goose, Coastal ecosystems, Ecological dynamics, Environment, Izembek National Wildlife Refuge, Laguna Ojo de Liebre, Laguna San Ignacio, Mexico, Migratory birds, Population dynamics, Species life history, Species/population interactions, USGS Science Data Catalog (SDC), Waterfowl, Wildlife, Wildlife Biology, Yukon Delta, Yukon Delta National Wildlife Refuge, Yukon Kuskokwim Delta, Fewer tags Eelgrass (Zostera marina) Percent Cover Data from Katmai National Park and Preserve, Kenai Fjords National Park, and Prince William Sound, Alaska 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. Categories: Data; Tags: Alaska, Alaska Peninsula, Angiosperms (flowering plants), Animal and plant census, Aquatic Biology, All tags... Biological productivity, Biota, Coastal ecosystems, Ecosystem monitoring, Eelgrass, Environment, Estuarine ecosystems, Gulf of Alaska, Katmai National Park and Preserve, Kenai Fjords National Park, Marine ecosystems, Monocots, Nearshore ecology, Prince William Sound, Relative abundance analysis, Seagrass, Seagrass beds, USGS Science Data Catalog (SDC), Wildlife Biology, Zostera marina, Fewer tags Genetic Data from Cooper's Hawks (Accipiter cooperii), North America 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) Categories: Data; Tags: Accipiter cooperii, AgCA222, Age7.1JT, Alleles, Animals/Vertebrates, All tags... BV13, BV20, Biota, Birds, Birds of prey, British Columbia, Cooper's Hawk, DNA, Eagles/Falcons/Hawks and Allies, Environment, Gene Flow, Genetic Markers, Genetics, Genetics, Genotype, Microsatellite Repeats, NVH195-2, NVH206, North Dakota, Polymerase chain reaction, Population Genetics, Raptors, Site Fidelity, Terrestrial ecosystems, USGS Science Data Catalog (SDC), Wildlife, Wildlife Biology, Wisconsin, Fewer tags Radiocarbon Data from Coastal Environments on Montague Island, Alaska This dataset consists of sample descriptions and radiocarbon age data from coastal environments on Montague Island, Alaska, analyzed at the National Ocean Sciences Accelerator Mass Spectrometry Facility. Categories: Data; Tags: Alaska, Biota, Carbon-14 analysis, Coastal processes, Earth science, All tags... Earthquakes, Geology, GeoscientificInformation, Hazards, Montague Island, Prince William Sound, Seismology, Tectonic processes, USGS Science Data Catalog (SDC), Fewer tags Point Sampling Data for Eelgrass (Zostera marina) and Widgeongrass (Ruppia marina) Abundance in Embayments of the North Pacific Coast of Baja California, Mexico These data are in seven tables relating to surveys of eelgrass (Zostera marina) and widgeongrass (Ruppia maritima) beds in embayments of the north Pacific coast of Baja California, Mexico. The tables provide environmental conditions, eelgrass and widgeongrass abundance, and measurements used to estimate their aboveground biomass. These tables also provide information on percent cover, location, and tide height of eelgrass, widgeongrass and seaweeds, and water conditions during the survey. Version History: First release: March 2022 Revised: April 2023 (ver. 2.0) Categories: Data; Tags: Algae, Algae, Angiosperms (flowering plants), Animal and plant census, Aquatic Biology, All tags... Aquatic ecosystems, Aquatic plants, Bahia San Quintin, Baja California, Benthic habitat, Biological productivity, Biomass, Biota, Coastal ecosystems, Ecology, Eelgrass, Environment, Estuarine ecosystems, Field inventory and monitoring, Laguna Ojo de Liebre, Laguna San Ignacio, Macroalgae (seaweeds), Marine ecosystems, Mexico, Monocots, Plot sampling, Relative abundance analysis, Ruppia maritima, Seagrass, Seagrass beds, Seaweeds, USGS Science Data Catalog (SDC), Vascular plants, Widgeongrass, Zostera marina, Fewer tags Selected Peak-Flow Special Conditions for USGS Streamgages in Alaska This data package documents selected special conditions affecting the magnitude of peak flows at streamgages in Alaska. The data consist of a table of special conditions for selected peak flows and a table of data sources. This dataset resolves ambiguity introduced by historical variations in USGS National Water Information System (NWIS; https://doi.org/10.5066/F7P55KJN) peak-flow code assignment practices or inherent in defining multiple possible conditions for a single code. For peak flows assigned a code 3 or 9 in the NWIS peak-flow database, the special conditions forming the basis for code assignment were (1) snowmelt or (2) a sudden release of water. Sudden releases of water included glacier dammed lake outburst,... Categories: Data; Tags: Alaska, Discharge/flow, Floods, Hydrographic datasets, Hydrology, All tags... Hydrology, InlandWaters, Rivers/streams, Terrestrial Hydrosphere, Time series datasets, USGS Science Data Catalog (SDC), Water Resources, Fewer tags SUPERSEDED: Pacific Walrus Coastal Haulout Occurrences Interpreted from Satellite Imagery, 2023 This data release has been SUPERSEDED. No data are provided here. The geospatial outlines and herd size estimates of Chukchi Sea autumn walrus haulouts, interpreted from Satellite imagery, have been combined into a single updated U.S. Geological Survey data release: https://doi.org/10.5066/P9CSM0KN This data release contains maps, geospatial files, and a table of the satellite imagery types with the dates when they were collected and examined to interpret the presence of, and area occupied by, walruses at terrestrial haulouts. Estimates of the land area occupied by walruses are provided based on interpretation by experienced image reviewers. The images are from a variety of Earth observing satellite imagery sources... Tags: Alaska, Animals/vertebrates, Biota, Cape Serdtse-Kamen, Carnivores, All tags... Chukchi Sea, Chukotka, Coastal ecosystems, Environment, Field inventory and monitoring, Image collections, Mammals, Marine ecosystems, Marine mammals, Migratory species, Odobenus rosmarus divergens, Pacific Walrus, Pinniped, Point Lay, Remote sensing, Russia, Satellite imagery, Seals/sea lions/walruses, Seasonal distribution, USGS Science Data Catalog (SDC), Walrus, Wildlife, Fewer tags Marine Bird and Mammal Survey Data from Kachemak Bay, Katmai National Park and Preserve, and Kenai Fjords National Park These data are part of the Gulf Watch Alaska (GWA) long-term monitoring program, nearshore monitoring component. The dataset is comprised of six comma separated values (.csv) file exported from a relational database. The data consist of 1) summer marine bird and mammal densities, 2) winter marine bird and mammal densities, 3) summer marine bird and mammal observations, 4) winter marine bird and mammal observations, 5) summer marine bird and mammal survey strip transects, and 6) winter marine bird and mammal survey strip transects. Version History: First release: December 2017 Revised: July 2024 (ver. 2.0) Categories: Data; Tags: Alaska, Animals/Vertebrates, Biota, Birds, Coastal ecosystems, All tags... Community ecology, Ecology, Ecology, Environment, Environmental proxies, Field inventory and monitoring, Field sampling, Gulf of Alaska, Intertidal zone, Kachemak Bay, Katmai National Park and Preserve, Kenai Fjords National Park, Macroinvertebrates, Mammals, Marine ecosystems, Marine environment monitoring, Marine environments, Marine mammals, Nearshore ecology, Population density, Population trend, Relative abundance, Seabirds, Shorebirds, Spatial distribution, USGS Science Data Catalog (SDC), Wildlife, Wildlife Biology, Fewer tags Molecular Sexing of Birds Using Quantitative PCR (qPCR) of Sex-Linked Genes and Logistic Models This dataset provides cycle threshold (Ct) values achieved during qPCR for 6 sex-linked genes, and two autosomal genes, for individuals from 60 species and across 13 orders of birds. Categories: Data; Tags: Alaska, Animals/Vertebrates, Biota, Birds, DNA, All tags... Environment, Genetic Markers, Genetics, Genetics, Laboratory methods, Polymerase chain reaction, Quantitative PCR, USGS Science Data Catalog (SDC), Wildlife, Wildlife Biology, qPCR, Fewer tags Channel Geometry Data Collected Along the Totatlanika River, Alaska, August 2021 This dataset provides shapefiles and tabular data representing river channel geometries measured on photogrammetric imagery and extracted from a photogrammetric digital elevation model (acquired August 2021) along the Totatlanika River in central Alaska. This is a child item of the USGS Data Release: https://doi.org/10.5066/F7X63KF2 Categories: Data; Tags: Alaska, Alaska Range, Buzzard Creek, California Creek, GeoScientificInformation, All tags... Geomorphic Landforms/Processes, Geomorphology, Geomorphology, Geospatial Datasets, Land Surface, Land surface characteristics, Mountains, Orogenic Movement, Tectonic Landforms, Tectonic Processes, Tectonic Uplift, Tectonic processes, Topography, Totatlanika River, USGS Science Data Catalog (SDC), Fewer tags Rocky Intertidal Nucella, Lirabuccinum, Katharina, and Lottia Counts from Prince William Sound, Katmai National Park and Preserve, and Kenai Fjords National Park 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 three comma separated values (.csv) file exported from a Microsoft Access relational database. The data consist of 1) counts of Nucella spp., Lottia spp., Lirabuccinum dirum, and Katharina tunicata, 2) a taxonomic classification table, and 3) a table of Gulf Watch Alaska contributors. Version History: First release: September 2022 Revised: October 2023 (ver. 2.0) Categories: Data; Tags: Alaska, Alaska Peninsula, Animals/Invertebrates, Aquatic biology, Aquatic ecosystems, All tags... Benthic, Biospheric indicators, Biota, Chiton, Community ecology, Density, Ecology, Ecology, Ecosystem monitoring, Environment, Gulf of Alaska, Intertidal, Intertidal environments, Intertidal zone, Katharina, Katmai National Park and Preserve, Kenai Fjords National Park, Lirabuccinum, Marine ecosystems, Marine invertebrates, Mollusks, Nearshore ecology, Nucella, Prince William Sound, Snail, USGS Science Data Catalog (SDC), Wildlife biology, Wildlife disease, Fewer tags Pacific Walrus Coastal Haulout Images from Remote Camera Stations This data package contains 362 digital photos of a walrus haulout location at Cape Greig, on the Alaska Peninsula summer 2023 (2023-05-09 23:01:08 UTC through 2023-11-16 21:01:14 UTC). Photos were taken up to three times daily from a remotely operated camera located on a bluff above the haulout. The camera station was installed in the early spring 2023, prior to arrival of walruses at the site. Images are transferred via satellite link. Version History: First release: June 2023 Revised: January 2024 (ver. 2.0) Categories: Data; Tags: Alaska, Animals/vertebrates, Bering Sea, Biota, Cape Greig, All tags... Carnivores, Coastal ecosystems, Environment, Field inventory and monitoring, Image collections, Mammals, Marine ecosystems, Marine mammals, Migratory species, Odobenus rosmarus divergens, Pacific Walrus, Pinniped, Remote photo imagery, Remote sensing, Seals/sea lions/walruses, Seasonal distribution, USGS Science Data Catalog (SDC), Walrus, Wildlife, Wildlife Biology, Fewer tags Genetic Data from Wolverine (Gulo gulo) of North America These data are comprised of two tables, one table containing wolverine (Gulo gulo) sample and genetic information for 20 microsatellite loci (Gg10-1, Gg25, Gg37-2, Gg42-1, Gg192-1, Gg443, Gg452, Gg454, Gg465, Gg471, Gg473, Gg-3-1, Gg-4, Gg-7-1, Ggu_216-1, Lut604, Ma-3-1, Mvis075, Tt-1, and Tt-4) and genetic sex determination results from North America and one Russian wolverine. All samples were obtained from collections at the University of Alaska Museum of the North or the University of New Mexico’s Museum of Southwestern Biology. The second table provides complete primer information for the genetic markers since several were redesigned from their originally-published sequences for this study. Categories: Data; Tags: Alaska, Alleles, Animals/Vertebrates, Biota, British Columbia, All tags... Canada, Carnivores, Chukotka, DNA, DNA Primers, Environment, Gene Flow, Genetic diversity, Genetic markers, Genetic structure, Genetics, Genetics, Gulo gulo, Kenai Peninsula, Mammals, Martens/Weasels/Wolverines, Microsatellite Repeats, Nunavut, Polymerase chain reaction, Population Genetics, Russia, Sexing (plants & animals), Terrestrial ecosystems, USGS Science Data Catalog (SDC), Wildlife, Wildlife Biology, Wolverine, Yukon, Fewer tags Diatom Data from Coastal Environments on Montague Island, Alaska This dataset consists of fossil diatom counts from sediment cores collected in coastal environments on Montague Island, Alaska, and analyzed at Virginia Tech University. Categories: Data; Tags: Alaska, Biota, Diatoms, Drilling and coring, Geology, All tags... GeoscientificInformation, Marine Geology, Microalgae, Montague Island, Prince William Sound, Sediments, Stratigraphy, USGS Science Data Catalog (SDC), Fewer tags 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/suis, and canine distemper virus. Parasitology analyses were conducted for presence of Giardia cysts and Cryptospiridium oocysts in fecal samples. Polar bears were sampled on sea ice in the Chukchi Sea between mid-March and early May 1987-1994 and 2008-2017. The dataset includes relevant information about the bears that were captured... Categories: Data; Tags: Age composition, Alaska, Animals/Vertebrates, Bacterial diseases, Bears, All tags... Beaufort Sea, Biota, Brucella, Brucella abortus, Brucella canis, Carnivores, Chukchi Sea, Coastal ecosystems, Coxiella, Coxiella burnetii, Cryptosporidium, Disease detection, Environment, Francisella, Francisella tularensis, Giardia, Health and disease, Immunology, Mammals, Marine ecosystems, Marine mammals, Neospora, Neospora caninum, Parasitic diseases, Parasitism, Pathology, Polar bear, Serology, Toxoplasma, Toxoplasma gondii, USGS Science Data Catalog (SDC), Ursus maritimus, Viruses, Wildlife, Wildlife Biology, Wildlife Disease, Wildlife disease, Fewer tags U.S. Fish and Wildlife Service Argos GPS Satellite Tracking Data for Lesser Yellowlegs (Tringa flavipes) This data package contains location data collected by the Argos System (CLS America, Inc.) from satellite transmitters attached to 116 Lesser Yellowlegs captured at multiple sites across their breeding and nonbreeding range in North America, 2018-2021. The raw data were processed to accomplish two goals: 1) flag implausible location and 2) remove locations within Joint Base Elmendorf-Richardson (JBER) and Eielson Air Force Base boundaries. Removal of locations in military land boundaries is required due to federal guidelines by Department of Defense (DoD) Public Affairs office and DoD Partners in Flight. Due to data sharing constraints of participating agencies, not all the locations (i.e., latitude and longitude)... Categories: Data; Tags: Alaska, Anchorage, Animal tracking, Animals/Vertebrates, Annual cycle, All tags... Argos, Biota, Birds, Breeding sites, Canada, Capture-recapture studies, Central America, Churchill, Coastal ecosystems, Ecology, Eielson AFB, Environment, Ile Nue de Mingan, James Bay, Joint Base Elmendorf-Richardson, Kanuti National Wildlife Refuge, Marine ecosystems, Migratory birds, Migratory rates/routes, Migratory species, Non-breeding range, Ornithology, Overwintering, Satellite transmitter, Seasonal distribution, Seasonal movement, South America, Species life history, Tagging devices, The Caribbean, Tracking equipment, USGS Science Data Catalog (SDC), United States of America, Waders/Gulls/Auks and Allies, Wildlife, Wildlife Biology, Yellowknife, Fewer tags 1 2 3 4 »