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LEVEL III AND IV ECOREGIONS OF ILLINOIS
Citation:
WOODS, A., J. M. OMERNIK, C. L. PEDERSON, AND B. MORAN. LEVEL III AND IV ECOREGIONS OF ILLINOIS. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-06/104 (NTIS PB2007-107906), 2006.
Impact/Purpose:
This project refined and subdivided the level III ecological regions of Illinois.
Description:
The ecoregions of Illinois have been identified, mapped, and described; they provide a geographic structure for environmental resources research, assessment, monitoring, and management. This project is part of a larger effort by the U.S. EPA to create a national, hierarchical ecoregion framework. This ecoregion framework is methodologically consistent with those developed elsewhere by the U.S. EPA and allows biologists and resource managers to share and compare environmental data across political boundaries. The amount of environmental detail that is delineated at different hierarchical levels varies from level I, the broadest grouping, to level IV, the most detailed.
This project refined and subdivided the level III ecological regions of Illinois. The work in Illinois involved researchers from the USEPA-National Health and Environmental Effects Research Laboratory (Corvallis, Oregon), USEPA Region 5, Illinois Environmental Protection Agency, Illinois Natural History Survey, Illinois State Geological Survey, Illinois State Water Survey, U.S. Department of Agriculture¿Natural Resources Conservation Service, and Eastern Illinois University. This project was partly conducted under the auspices of the Program for Cooperative Research on Aquatic Indicators Award # CR-831682-01.
Ecoregions of Illinois will be published as an U.S. Environmental Protection Agency Report Each ecoregion is delineated on a 1:2,850,000 scale (approximate) black and white map, and described in the accompanying text and tables.
Level IV ecoregion frameworks have been developed by the US EPA for Alabama, Arkansas, Colorado, Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maryland, Massachusetts, Mississippi, Missouri, Montana, Nebraska, Nevada, New Mexico, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Virginia, Washington, West Virginia, Wisconsin, and Wyoming.