Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Regionalization of the Western Corn Belt Plains Ecoregion.
Author Bernert, J. A. ; Eilers, J. M. ; Ripple, W. J. ; Freemark., K. E. ;
CORP Author Terrene Inst., Inc., Washington, DC. ;E and S Environmental Chemistry, Inc., Corvallis, OR.;Corvallis Environmental Research Lab., OR.
Publisher Apr 94
Year Published 1994
Report Number EPA/600/R-94/037;
Stock Number PB94-160579
Additional Subjects Agriculture ; Pesticides ; Chemical compounds ; Ecosystems ; Boundaries ; Pollution prevention ; Digital techniques ; Mapping ; Species diversity ; Geology ; Land use ; Soils ; Vegetation ; Iowa ; Corn Belt ; Midwest Region(United States)
Library Call Number Additional Info Location Last
NTIS  PB94-160579 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 09/01/1994
Collation 131p
As part of a larger effort to study the fate and transport of agrichemicals in the midwestern United States, the U.S. Environmental Protection Agency commissioned a study of spatial variability within the Western Corn Belt Plains ecoregion. The objective of this study was to systematically partition the study area into subregions that best reflected the ecological diversity of the region. A process was developed which relied to a large degree on small-scale digital data to quantify spatial concordance among data sets, group data sets into related themes, assign boundaries based on spatially-variable contingency statements, and reflect the uncertainty in transition zones between subregions using variable width boundaries. Some of the most prominent ecological units were identified on the basis of surficial geology, soils, vegetation, and land use. The systematic methodology used offers advantages over some previous methods for identifying ecological regions.