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Spatial, temporal, and environmental trends of fish assemblages within six reaches of the Upper Mississippi River System


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We investigated differences in adult and young-of-the-year (YOY) fishes within each of the six Long Term Resource Monitoring Program study areas, using monitoring data from 1993 to 2001. Our objective was to investigate the relative roles of seasonal, annual, in situ, and physical habitat factors in explaining assemblage structure patterns within the Long Term Resource Monitoring Program study areas. Adult and YOY assemblage structure within each reach was dominated by one to three numerically abundant species. The percent of the total abundance for which these species accounted was 10–88% and varied among age classes and study areas. Physical habitat classes were only weakly associated with differences in fish assemblage patterns [...]



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  • Upper Midwest Environmental Sciences Center (UMESC)



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U.S. Geological Survey, Upper Midwest Environmental Sciences Center, La Crosse, Wisconsin

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