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Multiyear synthesis of the aquatic vegetation component from 1991 to 2002 for the Long Term Resource Monitoring Program

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Aquatic vegetation data were collected in the Upper Mississippi River System (UMRS) under the Long Term Resource Monitoring Program (LTRMP). From 1991 to 2002, five reaches were surveyed every year (key pools), and another five reaches were surveyed once (outpools). The study design changed from a protocol involving sampling along transects (1991–2000) to a protocol incorporating stratified random sampling (1998–2002) with concurrent sampling under both protocols in 1998–2000. The frequency of occurrence of plants revealed no synchronous trends among three key pools (Pools 4, 8, and 13) supporting sizable submersed aquatic vegetation beds. Submersed aquatic vegetation in upper Pool 4 declined steadily between 1991 and 2002. Submersed [...]

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Yao Yin, Heidi Langrehr

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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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