Distribution of Fish, Benthic Invertebrate, and Algal Communities in Relation toPhysical and Chemical Conditions, Yakima River Basin, Washington, 1990. National Water-Quality Assessment Program

摘要

This report documents the results of fish, benthic invertebrate, and algalcommunity sampling conducted as part of the Yakima River Basin pilot study during 1990. It includes a description of sampling techniques; a listing of the fish, benthic invertebrates, and algae collected; a classification of site conditions based on physical, chemical, and biological characteristics; the identification of major natural and human factors that affect the distribution of fish, benthic invertebrates, and algae; and a description of the response of these communities to physical and chemical conditions. These data may be used by scientists and resource managers to quantitatively describe the (1) spatial distribution of fish, benthic invertebrates, and algae in the Yakima River Basin; (2) suitability of streams for designated beneficial uses, including aquatic life; and (3) major natural and human factors that relate to the distribution of fish, benthic invertebrates, and algae. This report also addresses the relevance of these results to the management of water resources in the Yakima River Basin and suggests future directions for investigations of water quality in the Yakima River Basin during subsequent cycles of the NAWQA Program.