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Location Folder Show Tree ROOT _ScienceBase Catalog 3DSC Alaska Science Center (ASC) Alkalic Igneous Centers of the Great Plains and Rocky Mountains: Data in Support of Critical Mineral Resource Studies AMMonitor: Remote wildlife monitoring for adaptive management Amphibian Research and Monitoring Initiative More... Filters Date Range Past year (12) Past month (3) Past week (0) Past day (0) Custom range... To   Search Extensions Shapefile (3) ArcGIS Service Definition (2) Types Map Service (10) OGC WFS Layer (9) OGC WMS Layer (9) OGC WMS Service (6) Downloadable (5) More... Contacts Nora B Shew Ecosystems U.S. Geological Survey Janet H Curran Keith A Labay More... Categories Data (17) Tag Types Theme (17) Place (17) USGS Scientific Topic Keyword (15) Harvest Set (17) Subject (3) Tag Schemes USGS Thesaurus (13) NASA GCMD Earth Science Keyword Thesaurus (12) None (12) USGS Geographic Names Information System (GNIS) (13) USGS CSA Biocomplexity Thesaurus (8) Protected Areas Database of the United States (PAD-US) (3) ISO 19115 Topic Category (15) More... View Results as: JSON ATOM CSV Browse Folder

Data and results for GIS-based identification of areas that have resource potential for sediment-hosted Pb-Zn deposits in Alaska This data release contains the analytical results and the evaluated source data files of a geospatial analysis for identifying areas in Alaska that may have potential for sediment-hosted Pb-Zn (lead-zinc) deposits. The spatial analysis is based on queries of statewide source datasets Alaska Geochemical Database (AGDB3), Alaska Resource Data File (ARDF), and Alaska Geologic Map (SIM3340) within areas defined by 12-digit HUCs (subwatersheds) from the National Watershed Boundary dataset. The packages of files available for download are: 1. The results in geodatabase format are in SedPbZn_Results_gdb.zip. The analytical results for sediment-hosted Pb-Zn deposits are in a polygon feature class which contains the points... Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: USGS Science Data Catalog (SDC), geochemistry, lead, sediment, zinc 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 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 results for Saxitoxin (STX) and related congeners. Categories: Data; Tags: Acute toxicity, Alaska, Animals/Vertebrates, Aquatic Biology, Behavior, All tags... Bioaccumulation, Biological Science Disciplines, Biota, Biotoxin, Birds, Disease, Dose-response effects, Ecology, Ecotoxicology, Effective Dose, Environment, Environmental Health, Harmful algal bloom, Health, Laboratory experiments, Marine ecosystems, Natural Science Disciplines, Neurotoxin, Paralytic shellfish toxin, Pathologic Processes, Real-time monitoring and reporting, Saxitoxin, Seward, Tracer study, USGS Science Data Catalog (SDC), Waders/Gulls/Auks and allies, Wildlife Biology, Wildlife Disease, Fewer tags Harlequin Duck Genetic Data, North America, Greenland, and Iceland, 1945-2006 This data package is comprised of three tables with data from wintering Harlequin Ducks (Histrionicus histrionicus) from Alaska, British Columbia, Washington, Maine, Greenland, and Iceland. The first table contains available allele sizes for 7 microsatellite loci (Sfiµ1, Sfiµ4, Sfiµ9, Sfiµ10, Bcaµ10, Hhiµ2, Hhiµ5) and mtDNA control region haplotypes. The second table contains the mtDNA control region sequences used to assign haplotypes. The third table provides the geographic locations of sampling sites. Categories: Data; Tags: Alaska, Alleles, Animals/Vertebrates, Biota, Birds, All tags... British Columbia, Canada, Coastal ecosystems, DNA Primers, DNA sequencing, DNA, Mitochondrial, Ducks/Geese/Swans, Environment, Gene Flow, Genetic diversity, Genetic markers, Genetics, Genetics, Genotype, Greenland, Harlequin Duck, Histrionicus histrionicus, Iceland, Magadan, Maine, Marine ecosystems, Microsatellite Repeats, Migratory birds, Overwintering, Polymerase chain reaction, Population Genetics, Russia, USGS Science Data Catalog (SDC), Washington, Waterfowl, Wetland ecosystems, Wildlife, Wildlife Biology, Fewer tags Drainage basins for selected transboundary streams in south-east Alaska and Canada through 2022 This dataset consists of drainage basin boundaries for selected transboundary basins draining to the Gulf of Alaska in south-east Alaska. Basins were delineated to the basin outlet using a tidal datum of mean high water (MHW). The drainage basins are provided as polygons attributed with basin drainage area and as polylines attributed with the data source for each line segment, respectively. Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Geomorphology, USGS Science Data Catalog (SDC), Water Resources, drainage basins, inlandWaters, All tags... watershed, Fewer tags Data for Infectivity of Wild-Bird Origin Influenza A Viruses in Minnesota Wetlands Across Seasons This data set represents an ecological and laboratory-based experiment to understand influenza virus viability in surface water. Data tables included in this release consist of 1) daily mean water temperature, 2) viability of viruses maintained in water, 3) influenza detection in duck samples, 4) viral titers of experimentally inoculated water samples, and 5) water chemistry. Categories: Data; Tags: Agassiz National Wildlife Refuge, Animal disease, Animal diseases/disorders/pests, Animals/vertebrates, Aquatic Biology, All tags... Avian influenza, Biota, Birds, Disease reservoirs, Disease/epidemic, Ducks/geese/swans, Environment, Environmental Health, Freshwater ecosystems, Genetics, Health, Health and disease, Influenza A virus, Lakes/reservoirs, Migratory birds, Minnesota, Persistence, Roseau River Wildlife Management Area, USGS Science Data Catalog (SDC), Virus Diseases, Viruses, Waterfowl, Wildlife, Wildlife Biology, Wildlife Disease, Wildlife disease, Fewer tags Alaska Land Carbon Assessment Data We are provoding a set of table and maps that provides summary of ecosystem carbon balance (pools and fluxes) as simulated by the Dynamic Organic Soil version of the Terrestrial Ecosystem Model. Simulations are provided for the historical period from 1950 to 2009 and projections from 2010 to 2099, for the four main landscape conservation cooperative regions in Alaska (i.e. the Arctic, the Western Alaska, the North Pacific and the Northwest Boreal LCCs). Projections have been conducted at 1km-resolution for two set of climate scenarios for the A1B, B1 and A2 emission scenarios of the Intergovernmental Panel on Climate Change Special Report on Emissions Scenarios (IPCC-SRES). The two global circulation models used... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Alaska, Carbon balanace, NCCWSC, Soil, Terrestrial ecosystem, All tags... USGS Science Data Catalog (SDC), Vegetation, geoscientificInformation, Fewer tags 01 - Results for GIS-based Identification of Areas that have Resource Potential for Sediment-hosted Pb-Zn Deposits in Alaska Compressed file SedPbZn_Results_gdb.zip contains the analytical results of a geospatial analysis for identifying areas in Alaska that may have potential for sediment-hosted Pb-Zn (lead-zinc) deposits. The spatial analysis is based on queries of statewide source datasets Alaska Geochemical Database (AGDB3), Alaska Resource Data File (ARDF), and Alaska Geologic Map (SIM3340) within areas defined by 12-digit HUCs (subwatersheds) from the National Watershed Boundary dataset. An ArcMap mxd file, layer file, and geodatabase with cartographic layers is provided for users to view the analytical results in ArcMap. Additional files include FGDC metadata, a pdf showing the query parameters for the analysis, and a README file.... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Alaska, Mineral deposits, lead, zinc Data and results for GIS-based identification of areas that have resource potential for lode gold deposits in Alaska This data release contains the analytical results and evaluated source data files of geospatial analyses for identifying areas in Alaska that may be prospective for different types of lode gold deposits, including orogenic, reduced-intrusion-related, epithermal, and gold-bearing porphyry. The spatial analysis is based on queries of statewide source datasets of aeromagnetic surveys, Alaska Geochemical Database (AGDB3), Alaska Resource Data File (ARDF), and Alaska Geologic Map (SIM3340) within areas defined by 12-digit HUCs (subwatersheds) from the National Watershed Boundary dataset. The packages of files available for download are: 1. LodeGold_Results_gdb.zip - The analytical results in geodatabase polygon feature... Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: Alaska, Alaska lode gold geology, Alaska lode gold geology geochemistry, Economic Geology, Epithermal, All tags... Geochemistry, Geochemistry, Geographic Information System (GIS), Geology, Gold, Lode gold, Mineral resources, Orogenic, Porphyry, Prospectivity mapping, Reduced intrusion-related gold, United States, Fewer tags Data from the Capture and Collection of Non-Die-Off Seabirds Across Alaska This data package contains one table with morphometric and diet information for "non-die-off" seabirds captured and collected in southcentral and southwest Alaska. Data pertains to birds captured (live) or collected (lethally) including, bird identification numbers, sampling dates, geographic locations, body measurements, diets (from either stomach contents or regurgitated prey), and sex and age of the bird when discernible. Common Murres (Uria aalge) and Black-legged Kittiwakes (Rissa tridactyla) were captured from their breeding colonies in lower Cook Inlet, Alaska, 2016-2023. Kittiwakes, murres, Glaucous-winged Gulls (Larus glaucescens) and Horned Puffins (Fratercula corniculata) were collected in Prince William... Categories: Data; Tags: Alaska, Animals/vertebrates, Aquatic birds, Aquatic ecology, Aquatic ecosystems, All tags... Aquatic sciences, Biota, Capturing (animals), Coastal ecosystems, Community ecology, Cook Inlet, Diets, Ecology, Environment, Field inventory and monitoring, Food web, Gulf of Alaska, Marine ecosystems, Morphology (biological), Prince William Sound, Specimen collecting, USGS Science Data Catalog (SDC), Unalaska Island, Waders/gulls/auks and allies, Wildlife biology, Fewer tags Soil and Vegetation Data from Lake-Margin Wetlands in the Yukon Flats National Wildlife Refuge This data release provides seven datasets of soil and vegetation data from lake margin soils from throughout the Yukon Flats National Wildlife Refuge. 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 phospholipid fatty acids and soil enzyme activity data for multiple enzymes involved in C,N, and P cycling. Data also includes information on respiration rate constants (k) and labile substrate pool (Ao) from soil incubations. Other soil chemical attributes such as soil pH, electrical conductivity, percent C and percent N are also included. Categories: Data; Tags: Alaska, Biogeochemical cycles, Biomass, Biomass dynamics, Biota, All tags... Community ecology, Environment, Landscape ecology, Primary production, Terrestrial ecosystems, USGS Science Data Catalog (SDC), Wetland ecosystems, Yukon Flats, Yukon Flats National Wildlife Refuge, Fewer tags 02 - Source Data for GIS-based Identification of Areas that have Resource Potential for Sediment-hosted Pb-Zn Deposits in Alaska Compressed file sedPbZn_SourceData_gdb.zip contains the GIS datasets and Python scripts used to calculate the estimated potential and certainty that sediment-hosted Pb-Zn (lead-zinc) deposits might be present in an area in Alaska. The statewide datasets include: Alaska Geochemical Database (AGDB3), Alaska Resource Data File (ARDF), lithology layers created from Alaska Geologic Map (SIM3340), and 12-digit HUCs, subwatersheds from the National Watershed Boundary dataset. FGDC metadata for all datasets are included. In addition, files are included for the user to modify the parameters of the analysis. These include two Python scripts, 1) used to score ARDF sites for sediment-hosted Pb-Zn potential, and 2) to evaluate... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: geochemistry, geologic map, lead, mineral resource, watershed, All tags... zinc, Fewer tags Black Oystercatcher Morphology and Primary Feather Lengths in Alaska and British Columbia, 2019-2022 These data provide morphological measurements and primary feather length measurements of Black Oystercatcher (Haematopus bachmani) captured at several sites across Alaska and British Columbia between 2019 and 2022. The first table contains mass and morphological measurements of body and bill size. The second table provides lengths of individual primary feathers measured from folded wing photographs using a computer software. These feather lengths are to be used in a size-constrained components analysis to calculate wing shape such as pointedness and convexity. Categories: Data; Tags: Age structure, Alaska, Animal morphology, Animals/Vertebrates, Avian physiology, All tags... Biota, Birds, Body size, Body weight, British Columbia, Canada, Capturing (animals), Coastal ecosystems, Ecology, Ecology, Environment, Gulf Islands, Haida Gwaii, Kachemak Bay, Katmai National Park and Preserve, Kenai Fjords National Park, Marine biology, Marine ecosystems, Migratory birds, Nearshore marine ecosystem, Pacific Rim National Park, Prince William Sound, Salish Sea, Sandpipers, Scientific interpretation, Sexual dimorphism, USGS Science Data Catalog (SDC), Wildlife Biology, Wing shape, Fewer tags 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. Categories: Data; Tags: Alaska, Animals/Vertebrates, Annual cycle, Biota, Birds, All tags... Black brant, Branta bernicla nigricans, Coastal ecosystems, Ducks/Geese/Swans, Environment, Light-level geolocator, Migratory birds, Migratory rates/routes, Migratory species, NPR-A, National Petroleum Reserve-Alaska, Seasonal distribution, Species life history, Tagging devices, Telemetry, Tracking equipment, Tundra ecosystems, USGS Science Data Catalog (SDC), Waterfowl, Wildlife, Wildlife Biology, Yukon Delta, Yukon Delta National Wildlife Refuge, Yukon-Kuskokwim River Delta, Fewer tags Detection of the Aquatic Invasive Species (AIS) Elodea canadensis and E. nuttallii Using Environmental DNA (eDNA), Alaska This data set is comprised of one table with sampling information and National Center for Biotechnology Information (NCBI) BioProject accession numbers for sequence information of this amplicon-based study targeting Elodea canadensis and E. nuttallii in freshwater systems of Alaska from environmental samples. Highly conserved primers which can differentiate these species of interest were developed for four portions of Elodea mtDNA genes (ITS1-5.8S, atpB-rbcL, and two variations of trnL-trnF). The reference sequences and conserved primer sets to identify species present were developed using publicly available data from NCBI GenBank (https://www.ncbi.nlm.nih.gov/genbank/). Categories: Data; Tags: 5.8S, Alaska, Aquatic Biology, Aquatic ecosystems, Aquatic ecosystems, All tags... Aquatic invasive species, Biota, Coastal ecosystems, DNA Primers, DNA sequencing, Ecology, Elodea, Environment, Environmental DNA, Environmental Health, Genetic markers, Genetics, Marine environment monitoring, Metabarcoding, Mitochondrial DNA, Polymerase chain reaction, Tundra ecosystems, USGS Science Data Catalog (SDC), Weeds, noxious plants, or invasive plants, Wetland ecosystems, Wildlife, atpB-rbcL, eDNA, trnL-trnF, Fewer tags Copper River and Knik River Bathymetric Surveys at Select Alaska Highway Bridges near Flag Point and Butte, Alaska, 2020 In 2020, the Alaska Science Center and the Idaho Water Science Center conducted bathymetric surveys at three highway bridge structures. The bridge structures (NBI 331 and 1187) at Flag Point near Cordova, AK are located on Alaska State Route 10 (commonly referred to as the Copper River Highway). Bridge structure NBI 539 on the Knik River is located on the Old Glenn Hwy near Butte, AK. These bathymetry data generally include complete coverage for upstream and downstream channels, except for extreme shallow areas along banks, where structures limited boat access, or where data was removed during post-processing. Bridges 1187, 331, and 539 are scour-critical bridges, and 1187 and 539 are part of the Alaska Science... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: AK, ASCII, Alaska, Bathymetry, Butte, All tags... Copper River, Cordova, Geology, Geomorphology, Hydrology, Hypack, Hysweep, Knik River, Multibeam, Sedimentology, U.S. Geological Survey, USA, USGS, USGS Science Data Catalog (SDC), Water Depth, Water Resources, XYZ, elevation, inlandWaters, inlandWaters, swath bathymetry, topography, Fewer tags Selected streamgage sites and periods of record for consideration of flood-generating mechanisms in Hawai‘i and Southeast Alaska, 1913-2022 This data release consists of a comma-delimited ascii file with attributes for 21 U.S. Geological Survey streamgage sites in Hawai‘i and Southeast Alaska selected to enable assessment of how floods might change in a future climate. Floods in Hawai‘i and Southeast Alaska have led to loss of human life; damage to agricultural crops, cultural and biological resources, infrastructure, and property; threats to public health; and conditions that are highly disruptive to residents and visitors. Floods are generated by atmospheric and terrestrial processes that may be enhanced or depressed in response to climate change. Understanding the mechanisms that generate floods can be useful for assessing how floods may change in... Categories: Data; Tags: Alaska, Climatology, Drainage, Floods, Hawaii, All tags... Hydrographic datasets, Hydrology, Hydrology, InlandWaters, Rivers/streams, Streamflow, Terrestrial Hydrosphere, USGS Science Data Catalog (SDC), Fewer tags 03 - Appendices for GIS-Based Identification of Areas that have Resource Potential for Sediment-hosted Pb-Zn Deposits in Alaska Compressed file sedPbZn_Appendices.zip contains the appendix files 2, 3, and 4 associated with U.S. Geological Survey (USGS) publication Open-File Report 2020-1147. Appendix 2 provides the scoring criteria of the Alaska Resource Data File (ARDF), listing keywords for different ARDF fields and the weighting factor for each word. Appendix 3 lists the ARDF sites with the resulting scores of the keyword searches. Appendix 4 charts out the queries used on the Geologic Map of Alaska to create different lithology datasets. The appendices are each provided as XLSX and CSV files. Also included is a CSV with the results of the scoring analysis showing for each subwatershed (HUC12) the score for each source data layer, total... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service Alaska Landbird Monitoring Survey Dataset Boreal Partners in Flight developed the Alaska Landbird Monitoring Survey (ALMS) primarily to monitor breeding populations of landbirds in the vast off-road areas of Alaska in conjunction with data collected from the roadside North American Breeding Bird Survey (BBS). ALMS is a collaborative program in which agencies and other entities conduct standardized surveys of breeding birds and their habitats on the lands they manage and then provide the data to the U.S. Geological Survey Alaska Science Center for analysis and archiving. The ALMS monitoring program comprises a set of survey blocks that have been selected in a stratified-random design primarily across state and Federal natural resource lands in Alaska with... Categories: Data; Tags: Admiralty Island, Alaska, Alaska Maritime National Wildlife Refuge, Alaska Peninsula, Alaska Peninsula National Wildlife Refuge, All tags... Andreafsky Wilderness, Animal and plant census, Animals/vertebrates, Arctic National Wildlife Refuge, Biodiversity, Biogeography, Biota, Bird behavior, Birds, Chugach National Forest, Chugach State Park, Copper River Census Area, Copper River Delta Fish and Wildlife Management Area, Cranes and allies, Denali National Park and Preserve, Denali State Park, Detection distance, Ducks/geese/swans, Eagle/falcons/hawks and allies, East Fork Skagway River, Ecology, Ecology, Environment, Environmental conditions, Fairbanks North Star Borough, Field inventory and monitoring, Fort Greely, Grebes, Habitats, Herons/egrets and allies, Innoko National Wildlife Refuge, James Dalton Mountain, Joint Base Elmendorf-Richardson, Kanuti National Wildlife Refuge, Kenai Wilderness, Klondike Gold Rush National Historic Park, Kodiak National Wildlife Refuge, Koyukuk National Wildlife Refuge, Koyukuk River, Loons, Migratory birds, Mitkof Island, Mount Fairplay, National Petroleum Reserve in Alaska, Natlaratlen River, North Slope Borough, Nowitna National Wildlife Refuge, Ornithology, Perching Birds, Resident birds, Sandpipers, Selawik National Wildlife Refuge, South Baranof Wilderness, Spatial distribution, Taku Glacier, Terrestrial ecosystems, Tetlin National Wildlife Refuge, Tongass National Forest, Tracy Arm-Fords Terror Wilderness, USGS Science Data Catalog (SDC), Waders/gulls/auks and allies, Wildlife, Wildlife Biology, Fewer tags Corrected Fire Perimeters of Alaska's National Wildlife Refuges This data package includes 481 geospatial vector polygons of historic fire perimeters associated with National Wildlife Refuges in Alaska. These polygons, originally held within the Alaska Large Fire Database (ALFD), were reviewed and found to have geospatial inaccuracies with respect to the fire they represent. They were corrected and updated based on a variety of remote sensing resources; the Monitoring Trends in Burn Severity (MTBS) database (https://www.mtbs.gov/viewer/index.html), geospatial rasters of historic fire activity derived from Landsat 1-9 imagery in the Google Earth Engine(https://earthengine.google.com) environment, and historical air photos acquired through EarthExplorer (https://earthexplorer.usgs.gov/).... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Alaska, Alaska Peninsula National Wildlife Refuge, Arctic National Wildlife Refuge, Becharof National Wildlife Refuge, Disturbance, All tags... Environment, Fires, Forestry, Habitat alteration and disturbance, Innoko National Wildlife Refuge, Izembeck National Wildlife Refuge, Kanuti National Wildlife Refuge, Kenai National Wildlife Refuge, Kodiak National Wildlife Refuge, Koyukuk National Wildlife Refuge, Land Use / Land Cover, Land Use Change, Landsat, Landscape, Landscape Processes, Nowitna National Wildlife Refuge, Remote Sensing, Remote sensing, Selawik National Wildlife Refuge, Tetlin National Wildlife Refuge, Togiak National Wildlife Refuge, USGS Science Data Catalog (SDC), Wildland fire, Yukon Delta National Wildlife Refuge, Yukon Flats National Wildlife Refuge, Fewer tags 1 2 »