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Aquatic ecoregions of the conterminous United States

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Abstract

Ecoregions are based on perceived patterns of a combination of causal and integrative factors including land use, land surface form, potential natural vegetation, and soils (Omernik, 1987). This is a copy of the ecoregion coverage of Omernik (1987) with some item names modified. This is NOT the most recent version of the ecoregion definitions, which can be obtained from: Environmental Protection Agency, Western Ecology Division, Corvallis, OR at http://www.epa.gov/wed/pages/ecoregions/level_iii.htm.

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Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Unnumbered Series
Title:
Aquatic ecoregions of the conterminous United States
Year Published:
1987
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Reston, VA
Description:
Dataset
Country:
United States
Additional Online Files(Y/N):
N