Filters: partyWithName: David C Douglas (X) > Categories: Data (X)

Folders: ROOT > ScienceBase Catalog > Alaska Science Center (ASC) ( Show direct descendants )

Location Folder Show Tree ROOT _ScienceBase Catalog __Alaska Science Center (ASC) _Ecosystems _Geology & Natural Hazards _Water Ice & Landscapes aerialImagery aquaticEcology More... Filters Date Range Past year (4) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts Alaska Science Center Ecosystems USGS ScienceBase Team Anthony S Fischbach David H Ward More... Tag Types Theme (4) Place (4) Harvest Set (4) Ecology (1) USGS Scientific Topic Keyword (2) Tag Schemes USGS Thesaurus (4) None (4) NASA GCMD Earth Science Keyword Thesaurus (4) USGS Geographic Names Information System (GNIS) (4) USGS CSA Biocomplexity Thesaurus (3) ISO 19115 Topic Category (4) USGS Biocomplexity Thesaurus (1) More... View Results as: JSON ATOM CSV Browse Folder

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 Walrus Haulout Outlines Apparent from Satellite Imagery Near Point Lay Alaska, Autumn 2018-2020 These data are in three folders of Keyhole Markup Language (KML) geospatial polygons representing the outlines of walrus herds apparent in satellite imagery. Each KML file contains one or more geospatial polygons of walrus herd outlines created by one observer who visually interpreted the images. The attribute values from all KML files are collected in a CSV table included with this data package. Additional walrus satellite image-derived Chukchi Sea walrus haulout outlines are available in another USGS data release (Fischbach and Douglas 2022; https://doi.org/10.5066/P9CSM0KN) Categories: Data; Tags: Aerial surveys, Age composition, Alaska, Animals/Vertebrates, Biota, All tags... Carnivores, Chukchi Sea, Coastal ecosystems, Environment, Field inventory and monitoring, Mammals, Marine ecosystems, Marine mammals, Migratory species, Odobenus rosmarus divergens, Pacific Walrus, Point Lay, Remote sensing, Seals/sea lions/walruses, Seasonal distribution, USGS Science Data Catalog (SDC), Walrus, Wildlife, Wildlife Biology, Fewer tags Movement Data for Migrating Geese Over the Northeast Pacific Ocean, 2018-2021 This dataset consists of one table with a record (row) for each goose location and columns containing location information and covariates. The dataset was used in an analysis of altitude selection and flight propensity in an accompanying paper (Weiser et al. 2024) and is being provided here to allow replication of that analysis. Goose locations (latitude, longitude, and altitude) were collected with GPS tags and represent three subspecies: Pacific Greater White-fronted Goose, Tule Greater White-fronted Goose, and Lesser Snow Goose. Covariates include weather information from ERA5 (Hersbach et al. 2022). In addition to the "used" locations (altitudes at which birds were recorded), the dataset also includes "available"... Categories: Data; Tags: Alaska, Animal behavior, Animal tracking, Animals/Vertebrates, Anser albifrons elgasi, All tags... Anser albifrons sponsa, Anser caerulescens caerulescens, Biota, Birds, British Columbia, California, Ducks/Geese/Swans, Environment, GPS, Geospatial datasets, Greater White-fronted Goose, Human impacts, Human wildlife interactions, Marine ecosystems, Migration (organisms), Migratory birds, Migratory rates/routes, Oregon, Pacific Ocean, Pelagic habitat, Seasonal movement, Snow Goose, USGS Science Data Catalog (SDC), Washington, Waterfowl, Fewer tags Pacific Walrus Coastal Haulout Occurrences Interpreted from Satellite Imagery This dataset is derived from images from a variety of Earth observing satellite imagery sources collected at known walrus coastal haulouts in Alaska and Chukotka, Russia. Earth observing imagery sources used in this data release include (but are not limited to) optical imagery collections by: (1) the European Space Agency's Sentinel-2 mission, (2) the Plant Labs Planet Scope constellation, and (3) Maxar satellites, as well as synthetic aperture radar imagery collected by: (1) European Space Agency's Sentinel-1 mission, (2) the DLR (German Aerospace Agency) TerraSAR-X satellite, (3) the Umbra Space satellite constellation, (4) the Canadian Radarsat-2 satellite, (5) the Capella Space satellite constellation and (6)... Categories: Data; Tags: Alaska, Animals/Vertebrates, Biota, Carnivores, Chukchi Sea, All tags... Chukotka, Coastal ecosystems, Environment, Field inventory and monitoring, Image collections, Mammals, Marine ecosystems, Marine mammals, Migratory species, Odobenus rosmarus divergens, Pacific Walrus, Pinniped, Remote sensing, Russia, Satellite imagery, Seals/sea lions/walruses, Seasonal distribution, USGS Science Data Catalog (SDC), Walrus, Wildlife, Wildlife Biology, Fewer tags