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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 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 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 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 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 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 Sounding Cross Section Surveys at Alaska Bridge Crossings Since 1993 the U.S. Geological Survey (USGS) has worked with the Alaska Department of Transportation and Public Facilities (ADOT&PF) to provide hydraulic assessments of scour for bridges throughout Alaska. As part of this effort, repeat channel cross section surveys, or channel soundings, have been collected at either the upstream or downstream side of bridges on an annual or as needed basis. Streambed and bank elevations are measured using USGS sounding weights and reels, weighted measuring tapes, acoustic Doppler current profilers, multibeam echo sounders and light detection and ranging and are referenced to the datum of as-built plan set to provide context for the streambed elevations in relation to bridge structures.... Categories: Data; Tags: ADCP, Acoustic Doppler Current Profiling, Alaska, Bridges, Discharge/flow, All tags... Geomorphology, Hydrology, Hydrology, InlandWaters, Rivers/streams, Scour, Streambed, Terrestrial Hydrosphere, USGS Science Data Catalog (SDC), Water Resources, 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 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 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 Gridded Pre-2015 Bathymetry Data for Icy Bay and Taan Fiord, Alaska This data release provides a gridded compilation of bathymetry data collected prior to the 2015 landslide in Taan Fiord, the northeast arm of Icy Bay, Alaska. The data release consists of a 50-m grid, derived from ten prior surveys covering both Taan Fiord and Icy Bay. Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: ASC, Alaska, Alaska Science Center, Bathymetry, Bathymetry and elevation, All tags... CMHRP, Coastal and Marine Hazards and Resources Program, EHP, Earthquake Hazards Program, Elevation, Icy Bay, LHP, Landslide Hazards Program, Marine Geology, Oceans, Seismology, Singlebeam echo sounder, Taan Fiord, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), Fewer tags Dictionary of Microsatellite Loci from the U.S. Geological Survey, Alaska Science Center, Molecular Ecology Laboratory This data package provides a dictionary of microsatellite locus primers used by the USGS Alaska Science Center, Molecular Ecology Laboratory (MEL). It is a look-up file of microsatellite locus names and citations to the original publication or source where additional information about the locus primers may be found. Categories: Data; Tags: Alleles, Animals/Vertebrates, Biota, Birds, Data Analysis and Visualization, All tags... Environment, Genetic Screening, Genetic Variation, Genetic diversity, Genetic markers, Genetics, Genetics, Genetics, Genetics, Population, Laboratory methods, Microsatellite Repeats, Polymerase chain reaction, Polymorphism, Genetic, Reference and Information Services, USGS Science Data Catalog (SDC), Wildlife Biology, Fewer tags Sea Otter Aerial Survey Data from Western Prince William Sound, Alaska, 2022 This dataset consists of three tables related to abundance and distribution of northern sea otters (Enhydra lutris kenyoni) in western Prince William Sound, Alaska, based on data collected during a series of population-wide aerial surveys in June 2022. The dataset consists of: (1) sea otter counts along strip transects, (2) sea otter counts in Intensive Search Unit (ISU) within the transects, and (3) transect coordinates. Categories: Data; Tags: Abundance (organisms), Aerial surveys, Alaska, Animals/Vertebrates, Biota, All tags... Carnivores, Ecology, Ecosystem monitoring, Enhydra lutris kenyoni, Environment, Mammals, Marine mammals, Northern sea otters, Otters, Population density, Population dynamics, Prince William Sound, Sea otters, Spatial distribution, USGS Science Data Catalog (SDC), Wildlife, Wildlife Biology, 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 1 2 »