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Location Folder Show Tree ROOT _ScienceBase Catalog __Alaska Science Center (ASC) ____Ecosystems Aerial Photo Imagery from Fall Waterfowl Surveys, Izembek Lagoon, Alaska, 2017-2019 Bird Species Checklists from USGS Alaska Science Center Field Camps Data from Black Brant (Branta bernicla nigricans) Overwintering in Three Lagoons Along the Baja California Peninsula, Mexico Data from Prince William Sound: Distribution, Abundance, and Morphology of Fish, Zooplankton, and Predators and Oceanographic Conditions Pacific Walrus Coastal Haulout Occurrences Interpreted from Satellite Imagery More... Filters Date Range Past year (11) Past month (10) Past week (1) Past day (0) Custom range... To   Search Contacts Alaska Science Center Ecosystems USGS ScienceBase Team Vijay P Patil Barbara J Pierson More... Categories Data (11) Data Release - Revised (1) Tag Types Theme (11) Place (11) USGS Scientific Topic Keyword (10) Harvest Set (10) Ecology (1) Tag Schemes USGS CSA Biocomplexity Thesaurus (11) USGS Thesaurus (11) NASA GCMD Earth Science Keyword Thesaurus (10) None (11) NGA GEOnet Names Server (7) ISO 19115 Topic Category (11) USGS Geographic Names Information System (GNIS) (9) More... View Results as: JSON ATOM CSV Browse Folder

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 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 Detection of Seagrass Pathogens Using Environmental DNA (eDNA), North Pacific, 2016-present This data set is comprised of one table with sampling information and NCBI BioProject accession numbers for sequence information of this amplicon-based study targeting Labyrinthula, Phytophthora, and Halophytophthora of known pathogenic and non-pathogenic [to eelgrass (Zostera marina)] strains from eDNA samples. eDNA samples included water, sediment, and eelgrass from Notsuke Wan (Cove) Japan, Safety Sound, Izembek Lagoon, Port Moller, Chignik Lagoon, and Frederick Sound, Alaska and cloacal swabs from waterfowl hunted near Cold Bay Alaska. Replicate samples and multiple sampling dates of the same location were included. Highly conserved primers which could differentiate species of interest were developed for four... Categories: Data, Data Release - Revised; Tags: Alaska, Animals/Vertebrates, Aquatic Biology, Aquatic ecosystems, Biological informatics, All tags... Biota, Birds, DNA Primers, DNA, Mitochondrial, Databases, Nucleic acid, Decline (Plant disease), Disease detection, Disease spread, Disease vectors, Ducks/Geese/Swans, Ecological processes, Ecosystem, Ecosystem diversity, Environment, Environmental DNA, Environmental DNA, Feasibility studies, Field sampling, Genetics, Halophytophthora, Hokkaido, Izembek National Wildlife Refuge, Japan, Labyrinthula sp., Labyrinthula zosterae, Marine biology, Marine environment monitoring, Mitochondrial DNA, Ocean circulation, Oceans and Seas, Phytophthora gemini, Plants, Species/Population Interactions, USGS Science Data Catalog (SDC), Zostera marina, eDNA, Fewer tags Eelgrass (Zostera marina) Maps from 2016 and 2020, Izembek Lagoon, Alaska This data package includes 40 geospatial rasters (maps) depicting various metrics about eelgrass (Zostera marina) coverage at Izembek Lagoon, Alaska, during 2016 and 2020. Two maps were produced from two Sentinel-2 satellite images collected on July 1, 2016, and August 14, 2020. Spectral classes derived from each satellite image were annotated and mapped based on data collected in the field at plots within each spectral class. Categories: Data; Tags: Alaska, Alaska Peninsula, Angiosperms (flowering plants), Animal and plant census, Biological productivity, All tags... Biomass, Biota, Coastal ecosystems, Eelgrass, Environment, Estuarine ecosystems, Field inventory and monitoring, Izembek Lagoon, Izembek National Wildlife Refuge, Marine ecosystems, Monocots, Multispectral imaging, Relative abundance analysis, Remote Sensing, Remote sensing, Satellite imagery, Seagrass, Seagrass beds, Sentinel-2 satellite, Standing crop, USGS Science Data Catalog (SDC), USGS Scientific Topic Keyword, USGS:__, Zostera marina, Fewer tags Black Brant (Branta bernicla nigricans) Radio Detection and Migration Timing Alaska to Mexico This is a child item of the USGS Data Release: https://doi.org/10.5066/F7T43R88 This data package provides data from Pacific Black Brant (Branta bernicla nigricans) tagged with VHF radio transmitters in July 1999 on the Yukon Kuskokwim Delta, Alaska and detected in the following two years during their annual migration. Data include: 1) one table with attributes of the tagged brant, 2) one table with estimated dates of migration events, and 3) seven tables of detection data from radio tracking scans at coastal sites between Alaska and Mexico. Version History: First release: April 2023 Revised: February 2024 (ver. 2.0) 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 Tracking Data for Black Brant (Branta bernicla nigricans) This data package contains all location data collected by light-level geolocators attached to 68 Black Brant at breeding areas in Alaska. The data include: a deployment attributes file with details of each brant at the time of capture, the raw light-level data in ASCII files as downloaded and decompressed, and twice-daily estimated locations. Categories: Data; Tags: Alaska, Animal tracking, Animals/Vertebrates, Annual cycle, Baja California, All tags... Biota, Birds, Black brant, Branta bernicla nigricans, Breeding sites, Capture-recapture studies, Coastal ecosystems, Ducks/Geese/Swans, Environment, Light-level geolocator, Mexico, Migratory birds, Migratory rates/routes, Migratory species, NPR-A, National Petroleum Reserve-Alaska, Non-breeding range, Ornithology, Overwintering, Seasonal distribution, Seasonal movement, 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 Brant (Branta bernicla) Genetic Data from North America, Europe, and Asia This data package is comprised of one table with genetic data from Brant (Branta bernicla). Data include sampling location and allele sizes of 14 microsatellite loci. Categories: Data; Tags: Alaska, Alleles, Animals/Vertebrates, Aquatic ecosystems, Biota, All tags... Birds, Brant, Branta bernicla, Canada, Coastal ecosystems, DNA, DNA Primers, DNA sequencing, DNA, Mitochondrial, Ducks/Geese/Swans, Environment, Gene Flow, Genetic diversity, Genetic markers, Genetics, Genetics, Genotype, Iceland, Ireland, Marine ecosystems, Microsatellite Repeats, Migratory birds, Polymerase chain reaction, Population Genetics, Russia, The Netherlands, USGS Science Data Catalog (SDC), Waterfowl, Wetland ecosystems, Wildlife, Wildlife Disease, Fewer tags Data and Model-Based Estimates from Black Brant (Branta bernicla nigricans) Fall Age Ratio Surveys at Izembek Lagoon, Alaska These data are in two tables relating to fall age ratios (number of juvenile birds : total birds aged) of Black Brant (Branta bernicla nigricans) staging in Izembek Lagoon, Alaska, since 1963. The first table is observation data for the age classes of Black Brant during surveys, and associated survey characteristics. The second table contains model-based estimates of age ratios by year along with Standard Error (SE), and 95% Bayesian credible intervals around estimates. Version History: First release: March 2020 Revised: December 2020 (ver. 2.0) Revised: December 2021 (ver. 3.0) Revised: January 2023 (ver. 4.0) Revised: December 2023 (ver. 5.0) Categories: Data; Tags: Alaska, Animal populations, Animals/Vertebrates, Biota, Birds, All tags... Black Brant, Branta bernicla nigricans, Brent Goose, Computational methods, Ecological dynamics, Environment, Izembek Lagoon, Izembek National Wildlife Refuge, Mathematical modeling, Migratory birds, Population dynamics, Species life history, Species/population interactions, USGS Science Data Catalog (SDC), Waterfowl, Wildlife Biology, Wildlife biology, Fewer tags Point Sampling Data for Eelgrass (Zostera marina) and Seaweed Distribution and Abundance in Bays Adjacent to the Izembek National Wildlife Refuge, Alaska This data package is comprised of eight tables relating to surveys of eelgrass beds in Izembek and Kinzarof Lagoons, Izembek National Wildlife Refuge, Alaska. The tables provide environmental conditions, eelgrass abundance, distribution, and measurements used to estimate overall biomass. Version History: First release:October 2021 Revised: March 2023 (ver. 2.0) Revised: April 2023 (ver. 3.0) Revised: May 2023 (ver. 3.1) Revised: June 2024 (ver. 4.0) Categories: Data; Tags: Alaska, Alaska Peninsula, Angiosperms (flowering plants), Animal and plant census, Animals/Invertebrates, All tags... Aquatic Biology, Biological productivity, Biomass, Biota, Coastal ecosystems, Ecology, Eelgrass, Environment, Estuarine ecosystems, Field inventory and monitoring, Izembek Lagoon, Izembek National Wildlife Refuge, Kinzarof Bay, Macroalgae (seaweeds), Marine ecosystems, Marine environment monitoring, Monocots, Relative abundance analysis, Seagrass, Seagrass beds, Standing crop, Zostera marina, Fewer tags Body mass, Morphological Measurements, Flock Counts, and Age-Ratios from Black Brant Overwintering in Three Lagoons Along the Baja California Peninsula, Mexico This is a child item of the USGS Data Release: https://doi.org/10.5066/F7T43R88 This data package includes four tables of data from Pacific Black Brant (Branta bernicla nigricans) wintering along the Baja California Peninsula and Sonoran coasts of 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. Version History: First release: April 2023 Revised: February 2024 (ver. 2.0) Categories: Data; Tags: Animal populations, Animals/Vertebrates, Bahia San Quintín, Baja California, Baja California Sur, All tags... Biota, Birds, Black Brant, Branta bernicla nigricans, Brent Goose, Coastal ecosystems, Ecological dynamics, Environment, 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, 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