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The U.S. Geological Survey (USGS) has generated topographic moisture potential classes for the contiguous United States. These topographic moisture potential classes were created as part of an effort to map standardized, terrestrial ecosystems for the nation using a classification developed by NatureServe (Comer and others, 2003). Ecosystem distributions were modeled using a biophysical stratification approach developed for South America (Sayre and others, 2008) and now being implemented globally (Sayre and others, 2007). Substrate moisture regimes strongly influence the differentiation and distribution of terrestrial ecosystems, and are one of the key input layers in the ecosystem delineation process. The method...


    map background search result map search result map Terrestrial Ecosystems - Topographic Moisture Potential of the Conterminous United States Compound Topographic Index in the Wyoming Basins Ecoregional Assessment area Compound Topographic Index in the Wyoming Basins Ecoregional Assessment area Terrestrial Ecosystems - Topographic Moisture Potential of the Conterminous United States