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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 (1) Past month (0) Past week (0) Past day (0) Custom range... To   Search Extensions Raster (1) Types Citation (1) Downloadable (1) GeoTIFF (1) Map Service (1) Raster (1) Contacts Frank T van Manen Northern Rocky Mountain Science Center U.S. Geological Survey Mark A Haroldson GS ScienceBase More... Categories Data (2) Tag Types Theme (4) Place (4) USGS Scientific Topic Keyword (2) Harvest Set (2) Tag Schemes None (4) Geographic Names Information System (3) USGS Thesaurus (4) Common geographic areas (1) ISO 19115 Topic Category (4) USGS Biocomplexity Thesaurus (2) View Results as: JSON ATOM CSV Browse Folder

Randomized shortest paths for Grizzly Bear dispersal between the GYE and NCDE The Randomized Shortest Path (RSP) raster delineates potential dispersal paths for male-mediated gene flow between grizzly bear (Ursus arctos) populations in the Greater Yellowstone Ecosystem (GYE) and the Northern Continental Divide Ecosystem (NCDE). A RSP algorithm was used to estimate the average number of net passages for all grid cells at a spatial resolution of 300 m in the study region which spans parts of Montana, Idaho, and Wyoming. RSP rasters identify potential movement paths for 3 levels of random deviation determined by the parameter Θ (i.e., Θ = 0.01, 0.001, and 0.0001) for bears moving from an origin to a destination node. Lower values of Θ result in greater exploration and more random deviation around... Categories: Data; Types: Citation, Downloadable, GeoTIFF, Map Service, Raster; Tags: Glacier National Park, Grizzly Bears, Idaho, Montana, Northern Continental Divide Ecosystem, All tags... Wyoming, Yellowstone Ecosytem, bears, biota, connectivity, corridor, dispersal, ecology, grizzly bear, movement, random shortest path, step-selection model, Fewer tags Potential movement paths for male grizzly bear (Ursus arctos) dispersal between the Northern Continental Divide and Greater Yellowstone Ecosystems, 2000-2015 For several decades, grizzly bear (Ursus arctos) populations in the Greater Yellowstone Ecosystem (GYE) and the Northern Continental Divide Ecosystem (NCDE) have increased in numbers and range extent. Whereas the NCDE population is contiguous with grizzly bear populations in the Canadian Rocky Mountains, genetic evidence suggests the GYE population remains isolated. Recent analyses indicate the effective population size of GYE grizzly bears has increased and is approaching levels needed for long-term viability. With only ~110 km distance separating current estimates of occupied range for these populations, the potential for immigration into the GYE from an NCDE migrant, or vice versa, is likely greater now than... Tags: Ecology, Glacier National Park, Grizzly Bears, Idaho, Montana, All tags... Northern Continental Divide Ecosystem, USGS Science Data Catalog (SDC), Wildlife Biology, Wyoming, Yellowstone Ecosytem, Yellowstone National Park, bears, biota, connectivity, corridor, dispersal, ecology, grizzly bear, movement, random shortest path, step-selection model, Fewer tags Predicted grizzly bear habitat use in Western Montana: spatial data Grizzly bear (Ursus arctos) habitat use maps delineate predicted habitat use for grizzly bears around federally designated recovery zones in and near western Montana. These raster data are the official data release for Sells et al. (2022), “Grizzly Bear Habitat Selection Across the Northern Continental Divide Ecosystem” and Sells et al. (2023), “Grizzly bear movement models predict habitat use for nearby populations.” In summary, to better understand habitat selection by grizzly bears, Sells et al. (2022) developed and validated individual-based integrated step-selection functions (iSSFs) for 65 grizzly bears monitored in the Northern Continental Divide Ecosystem (NCDE; including 19 males and 46 females). Step-selection... Tags: Cabinet-Yaak Ecosystem, Cabinet-Yaak Ecosystem, Greater Yellowstone Ecosystem, Greater Yellowstone Ecosystem, Idaho, All tags... Montana, Northern Continental Divide Ecosystem, Northern Continental Divide Ecosystem, Selkirk Ecosystem, Selkirk Ecosystem, US Northern Rocky Mountains, United States, Ursus arctos, Washington, Wyoming, bears, biota, connectivity, grizzly bears, habitat use, integrated step selection functions, movement ecology, natural resource management, Fewer tags Body composition data of grizzly bears in the Greater Yellowstone Ecosystem 2000-2020 Understanding evolutionary processes that drive population dynamics is critical in ecology. Measuring the performance-density relationship in long-lived mammalian species demands long-term data, limiting the ability to observe such mechanisms. We tested density-dependent (intrinsic) and density-independent (extrinsic) drivers of body composition of grizzly bears (Ursus arctos) in the Greater Yellowstone Ecosystem over two decades. Categories: Data; Tags: Greater Yellowstone Ecosystem, Idaho, Montana, USGS Science Data Catalog (SDC), United States, All tags... Ursus arctos, Wildlife Biology, Wyoming, Yellowstone National Park, bear density, biota, body composition, body fat, ecology, grizzly bear, lean body mass, Fewer tags