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Communication at the NABS Annual meeting, Keystone, 2000
(65) AN INDEX OF BIOLOGICAL INTEGRITY FOR FIRST TO THIRD ORDER RUSSIAN RIVER STREAMS.
J.M. Harrington. California Department of Fish and Game, Rancho Cordova, California, USA 95670
The conceptual model described by the U.S. Environmental Protection Agency for developing biocriteria was followed to produce an Index of Biological Integrity for the Russian River (RRIBI). Benthos were collected from 35 reaches within 21 streams. Biological metrics ( Taxa Richness, EPT Taxa, Modified EPT Index, Shannon Diversity, Tolerance Value and Percent Dominant Taxa) were used to describe the benthos communities. The six metrics were scored by producing histograms of the values for each and visually determining breaks in their distributions. This approach of determining scoring criteria was more intuitive and probably most appropriate since the data were collected from streams that could have been moderately impaired and not actually representative of pristine reference conditions.
Presented at 8:45 AM on Tuesday, May 30, 2000 in Determining Good Sites from Bad I
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