Filters: Tags: historic range (X)
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GPChickenHistoricRange is an ESRI SDE Feature Class showing Colorado greater prairie chicken distribution. Maps are derived from records of lekking sites for greater prairie chickens. Leks may be classified as active, inactive or lek of unknown status. Classification is usually based on knowledge of population fluctuations and/or male attendance; leks are considered to identify important seasonal activity areas nearby. GPChickenHistoricRange is an ESRI shapefile showing areas where greater prairie chickens have been known to occur prior to 1955 (taken from Aldrich and Duvall, 1955). This information was derived from field personnel. A variety of data capture techniques were used including drawing on mylar overlays...
The delineation of priority areas in western North America for managing Greater Sage-Grouse (Centrocercus urophasianus) represents a broad-scale experiment in conservation biology. The strategy of limiting spatial disturbance and focusing conservation actions within delineated areas may benefit the greatest proportion of Greater Sage-Grouse. However, land use under normal restrictions outside priority areas potentially limits dispersal and gene flow, which can isolate priority areas and lead to spatially disjunct populations. We used graph theory, representing priority areas as spatially distributed nodes interconnected by movement corridors, to understand the capacity of priority areas to function as connected...
Historic range of the greater sage-grouse (Centrocercus urophasianus) in Montana (USA). The data were initially researched and compiled by Dr. Michael A. Schroeder, research biologist for the Washington State Department of Fish and Wildlife. The initial draft of current and historic range data was mapped and submitted to state, federal, and provincial natural resource agencies and other experts for review, comment, and editing. The final product represents the historic range/distribution in Montana based on review and incorporation of additional historic information by Montana Fish, Wildlife & Parks wildlife biologists and managers. Definition of "Historic Range" - The historic distribution represents the bird's...
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