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OLS Field Name OLS Field Data
Main Title Estimation and Application of Macroinvertebrate Tolerance Values.
CORP Author Environmental Protection Agency, Washington, DC. Office of Federal Facilities Enforcement.
Publisher Mar 2006
Year Published 2006
Report Number EPA/600/P-04/116F;
Stock Number PB2006-112292
Additional Subjects Macroinvertebrates ; Tolerance ; Benthos ; Aquatic biology ; Anthropogenic inputs ; Rivers ; Streams ; Water pollution ; Sensitivity ; Indicator species ; Heterlimnius ; Malenka ; Taxon-environment relationship
Library Call Number Additional Info Location Last
NTIS  PB2006-112292 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 05/28/2007
Collation 94p
Abstract Tolerance values provide a measure of the sensitivity of aquatic organisms to anthropogenic disturbance and have historically provided a useful tool for assessing the biological condition of streams and rivers. However, the tolerance values that are currently available are limited by the geographical areas in which they can be applied, and do not provide diagnostic information as to the causes of the impairment in streams. This report reviews and compares methods for estimating tolerance values from field data and for applying them to assess the biological condition of streams and to diagnose the causes of impairment. The intent of this report is to provide a resource of state, tribal, and regional biologists who wish to use tolerance values to help interpret biological data. Methods for estimating tolerance values first model (either explicitly or implicitly) the relationship between a given taxon and an anthropogenic stressor gradient (the taxonenvironment relationship). Then, a single representative value is extracted from this relationship, which is designated as the tolerance value. Three types of tolerance values are expressed on a continuous scale: (1) the weighted average, (2) cumulative percentiles, and (3) the maximum point of the taxon-environment relationship. A fourth type is categorical and classifies the shape of the taxon-environment relationship. All types of tolerance values provide fairly comparable rankings of tolerance among different taxa.
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Category Codes 57H; 48G; 48B; 68D
NTIS Prices PC A06/MF A01
Document Type NT
Cataloging Source NTIS/MT
Control Number 029000020
Origin NTIS
Type CAT