Browsing by Author "Gurtz, Martin E."
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Item DISTRIBUTION OF FISH, BENTHIC INVERTEBRATE, AND ALGAL COMMUNITIES IN RELATION TO PHYSICAL AND CHEMICAL CONDITIONS, YAKIMA RIVER BASIN, WASHINGTON, 1990(U.S. Geological Survey, 1997) Cuffney, Thomas F.; Meador, Michael R.; Porter, Stephen D.; Gurtz, Martin E.Biological investigations were conducted in the Yakima River Basin, Washington, in conjunction with a pilot study for the U.S. Geological Survey's National Water-Quality Assessment Program. Ecological surveys were conducted at 25 sites in 1990 to (1) assess water-quality conditions based on fish, benthic invertebrate, and algal communities; (2) determine the hydrologic, habitat, and chemical factors that affect the distributions of these organisms; and (3) relate physical and chemical conditions to water quality. Results of these investigations showed that land uses and other associated human activities influenced the biological characteristics of streams and rivers and overall water-quality conditions.