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Kuskokwim Bay chum salmon (Oncorhynchus keta) energy density, distribution, and stomach data, 2004 This data set documents the dry mass energy density, distribution, and stomach contents of age-0 chum salmon (Oncorhynchus keta) captured in the Kuskokwim Bay estuary in May and June 2004. The analysis of this data was published in Burrill et al. 2018 (DOI :10.1007/s00300-018-2297-2.). Categories: Data; Tags: Alaska, Bering Sea, Kuskokwim Bay, anadromous fish, biota, All tags... coastal zone, estuarine ecosystems, food web, migratory species, ontogeny, stomach contents, Fewer tags Population Plots at Two Seabird Colonies in Lower Cook Inlet, Alaska This dataset consists of one table with annual counts from population plots of Black-legged Kittiwakes and Common Murres at two seabird nesting colonies on Gull and Chisik Islands in lower Cook Inlet, Alaska. Categories: Data; Tags: Alaska, Animals/Vertebrates, Biota, Birds, Black-legged Kittiwakes, All tags... Breeding sites, Coastal ecosystems, Common Murres, Cook Inlet, Environment, Gulf of Alaska, Indicator species, Kachemak Bay, Marine ecosystems, Population dynamics, Rissa tridactyla, Uria aalge, Waders/Gulls/Auks and Allies, Wildlife, Fewer tags 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 Interior Alaska eBird Checklists These data are daily summary checklists of all bird species observed at U.S. Geological Survey, Alaska Science Center (ASC) field camps in Interior Alaska. Version History: First release: May 2021 Revised: February 2022 (ver. 2.0) Revised: February 2023 (ver. 3.0) Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service 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 Annual End-of-Summer Snow Cover on Glaciers in Alaska and Northwest Canada This dataset contains observations of the distribution of end-of-summer snow cover on approximately 3000 glaciers across Alaska and Northwest Canada. The data are provided as: (1) GeoTIFF rasters indicating the spatial extent of end-of-summer snow cover on each glacier's surface in each year (one raster per glacier per year), and (2) yearly tables with the equilibrium line altitude and the accumulation area ratio of the glaciers derived from the snow cover extent geotiffs. Snow cover was identified in Sentinel-2 imagery using a random forest algorithm trained with a manually-created validation dataset. A series of post-processing steps were used to infill missing data from terrain shadowing and cloud cover, and... Categories: Data; Tags: Accumulation Zones, Alaska, Canada, Cryosphere, GeoscientificInformation, All tags... Glacier Mass Balance, Glaciers, Glaciology, Glaciology, Snow, Snow and ice cover, USGS Science Data Catalog (SDC), Water Resources, Fewer tags Fish Creek Watershed Lake Cover Classification, NPRA, Jones, 2014-2016 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 connectivity, surface area dynamics, surrounding terrestrial ecotypes, and other important aquatic conditions. The FCW lake cover classification scheme provides lake specific information for an arctic watershed that will guide research and aid in the management of the natural and human-modified environment. Categories: Data Exit and Paradise Glacier Foreland, Alaska River and Glacier Maps, Channel Surveys, Digital Elevation Model, and Orthophoto, 1800s-2013 The dynamics of the linked river systems draining Exit and Paradise Glaciers have been dependent on glacial and fluvial controls since the 1800s. This data release contains maps of historical Exit and Paradise creek and glacier positions, 2013 channel survey and particle size data, and a 2012 digital elevation model and orthophoto for the Exit and Paradise glacier forelands, Alaska. Categories: Data Fish Species Composition and Diet Information in Lakes of the Arctic Coastal Plain, Alaska, 2011-2013 This dataset provides information on fish species composition and their diet information for 16 lakes and 16 ponds at two locations on the central Arctic Coastal Plain, Alaska. In one table, we provide the presence of fish species and the total species count for each lake or pond sampled. This table also includes metrics of surface water connectivity to the stream network. In a second table, stomach content information is provided for fish collected during summer sampling periods (late June to mid-August) over three years (2011–2013). The third table includes stable carbon isotope and stable nitrogen isotope signature data for fish species and snails (the baseline organism) from 16 water bodies at one study location... Categories: Data; Tags: Alaska, Arctic, Arctic Coastal Plain, Diet, Isotopes, All tags... North Slope Borough, Species composition, Species richness, Stomach contents, biota, inlandWaters, isotopic analysis, prey, Fewer tags Eelgrass (Zostera marina) Microsatellite DNA Data; Pacific Coast of North America, 2000-2009 This data set contains genetic information collected from eelgrass (Zostera marina) populations along the Pacific coast of North America from Alaska to Baha California. A total of 447 samples were collected comprising 401 unique individuals (genets) and 46 clones (ramets) from which 10 microsatellite DNA loci were obtained. Categories: Data; Types: Citation; Tags: Angiosperms (Flowering Plants), AquaticEcosystems, Bahia Magdelena, Bahia San Quintin, Biological Classification, All tags... Biosphere, Coastal Habitat, Ecological Dynamics, Estero Punta Banda, Evolutionary Adaptation, Gene Flow, Genetic Diversity, Genetic Structure, Izembek Lagoon, Kinzarof Lagoon, Kuskokwim Shoals, Monocots, Montague Island, Monterey Bay, Nakwasina Bay, Plants, Safety Sound, Saint Catherine Cove, Seagrass, Shallow Bay, Simeonof Island, Species/Population Interactions, Togiak Bay, Unga Island, Wide Bay, Yaquina Bay, biota, Fewer tags Stable Isotope Data from Diets and Tissues of Captive Bears Fed Experimental Diets This dataset contains stable isotope incorporation and discrimination results for several sets of feeding experiments with captive brown and polar bears. Experiments were designed to determine the effects of dietary lipid content and fasting behavior on discrimination in blood, hair, and fat. Data are divided into three components of the study: one to estimate isotopic discrimination with varying dietary lipid content, one to estimate the potential effects of fasting on tissue isotope values, and one to determine incorporation rates of isotopes in various tissues. The experiments were conducted between 2009 and 2013 with captive grizzly bears at Washington State University and captive polar bears at the Oregon... Categories: Data Enteroctopus Sampling Effects on Genetic Data, Prince William Sound, Alaska, 2012-2015 These are genetic data collected from replicated samples of 21 Enteroctopus (E. dofleini or a cryptic lineage) in Prince William Sound Alaska to evaluate tissue type, DNA extraction method, and time until analyses are completed on data reliability. Data collected from all samples include two microsatellites identified as possible lineage indicators, and nine microsatellite loci previously identified as polymorphic in both lineages. DNA sequence data from 528 bp of the octopine dehydrogenase (OCDE) gene were also collected. Categories: Data; Tags: Amino Acid Oxidoreductases, Animals/Invertebrates, Bald Head Chris Island, Biodiversity, Biodiversity, All tags... Biota, Cephalopods, Chenega, DNA, DNA sequencing, Electrophoresis, Environment, Genetic Markers, Genetic diversity, Genetics, Golden Bay, Port Wells, Herring Bay, Long Bay, Marine ecosystems, Microsatellite Repeats, Mollusks, Polymerase chain reaction, Population genetics, Port Wells, Prince William Sound, Prince of Wales Passage, Species diversity, Systematics and taxonomy, USGS:ASC145, Western Prince William Sound, Fewer tags Common Murre Disturbance Data on Gull Island, Kachemak Bay, Alaska This dataset consists of one table with predator disturbance information from the Common Murre breeding season (June-August) from 2016-2020 on Gull Island, Kachemak Bay, Alaska. Categories: Data; Tags: Alaska, Animal behavior, Animals/Vertebrates, Bald Eagle, Biota, All tags... Birds, Breeding sites, Breeding success, Coastal ecosystems, Common Murre, Community dynamics, Community ecology, Cook Inlet, Eagles/Falcons/Hawks and Allies, Ecosystem functions, Egg production, Environment, Field inventory and monitoring, Glaucous-winged Gull, Gulf of Alaska, Gull Island, Haliaeetus leucocephalus, Herring Gull, Kachemak Bay, Larus argentatus, Larus glaucescens, Marine ecosystems, Nesting behavior, Reproduction, USGS:ASC586, Uria aalge, Waders/Gulls/Auks and Allies, Fewer tags Selected Whole-Rock and Sediment Geochemistry Reanalysis Data Additions to the Alaska Geochemical DataBase (AGDB) from Archived Samples, Alaska This data release contains elemental concentration data from the reanalysis of 13,930 archived stream-sediment sample and associated stream sediment reference material and 968 archived rock samples and associated rock reference material. All archived material was from samples that were collected in Alaska. Samples were retrieved from the USGS Mineral Program's sample archive in Denver, CO. Sample processing consisted of splitting the appropriate aliquot for the requested analyses. Sample splitting was performed in the USGS Mineral Program's sample prep facilities. 13,800 samples were analyzed using a multi-element analytical method involving decomposition of the sample by sodium peroxide and elemental analysis by... Categories: Data; Tags: Alaska, Alaska Range, Aleutian Islands, Aleutian Range, Alexander Archipelago, All tags... Bering Sea, Brooks Range, Chugach Mountains, Geochemistry, Gulf of Alaska, Kuskokwim Mountains, Mineral Resources, Seward Peninsula, USGS Science Data Catalog (SDC), United States, Wrangell Mountains, aluminum, antimony, arsenic, barium, beryllium, boron, cadmium, calcium, cerium, cesium, chemical analysis, chromium, cobalt, copper, dysprosium, earth science, earth sciences, erbium, europium, ferric iron, ferrous iron, gadolinium, gallium, geochemistry, geochemistry, geoscientificInformation, germanium, gold, hafnium, holmium, indium, iron, lanthanum, lead, lithium, lutetium, magnesium, manganese, mercury, mineral resources, mineralogy, molybdenum, neodymium, nickel, niobium, palladium, potassium, praseodymium, rhenium, rubidium, samarium, scandium, selenium, silicon, silver, sodium, strontium, sulfur, tantalum, tellurium, terbium, thallium, thorium, thulium, tin, titanium, tungsten, uranium, vanadium, ytterbium, yttrium, zinc, zirconium, Fewer tags 1 2 3 4 5 ... 9 »