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Summary

Estimated number of breeding pairs of Grasshopper sparrow based on the amount of grass, trees, and/or hay in the landscape. Landscape scale varied from 1/4- to 2-mile radius depending on the species. Pair estimates were calculated for grass patches >=1 ha, extrapolated to 40-ac cells, then smoothed by averaging over a 1-mile radius. Models were based on point count surveys conducted in 2003-2005 throughout the Tallgrass Prairie Pothole Region. Point count locations were stratified by cover type, the amount of grass in the landscape, and USFWS Wetland Management District boundaries. Landcover data were derived from 2000 Thematic Mapper imagery. Grid values = number of breeding pairs per 30-m pixel.

Contacts

Distributor :
Michael Schwartz

Attached Files

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Extension: HAPET_GRSP_Pairs.zip

Original Metadata
1.06 GB
thumbnail.png thumbnail 442 Bytes
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Map

Spatial Services

ArcGIS Mapping Service

WMS Service

Communities

  • LC MAP - Landscape Conservation Management and Analysis Portal
  • Multi-LCC Mississippi Basin/Gulf Hypoxia Initiative

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Additional Information

ArcGIS Service Definition Extension

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files
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