Characterization of benthic communities and physical habitat in the Stanislaus, Tuolumne, and Merced Rivers, California

Environmental Monitoring and Assessment
Lenwood W HallRonald D Anderson

Abstract

The primary goal of this study was to characterize physical habitat and benthic communities (macroinvertebrates) in the Stanislaus, Tuolumne and Merced Rivers in California's San Joaquin Valley in 2003. These rivers have been listed as impaired water bodies (303 (d) list) by the State of California due to the presence of organophosphate (OP) insecticides chlorpyrifos and diazinon, Group A pesticides (i.e., organochlorine pesticides), mercury, or unknown toxicity. Based on 10 instream and riparian physical habitat metrics, total physical habitat scores in the Stanislaus River ranged from 124 to 188 (maximum possible total score is 200). The highest total habitat score was reported at the upstream site. Tuolumne River physical habitat scores ranged from 86 to 167. Various Tuolumne River physical habitat metrics, including total habitat score, increased from downstream to upstream in this river. Merced River physical habitat scores ranged from 121 to 170 with a significant increase in various physical habitat metrics, including total habitat score, reported from downstream to upstream. Channel flow (an instream metric) and bank stability (a riparian metric) were the most important physical habitat metrics influencing the various b...Continue Reading

References

May 13, 2005·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Lenwood W Hall, William D Killen

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Citations

May 13, 2005·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Lenwood W Hall, William D Killen
Mar 26, 2011·Brazilian Journal of Biology = Revista Brasleira De Biologia·W R FerreiraM Callisto

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