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Mortality, movement, and behavior of native mussels during a planned water level drawdown in Pool 6 of the Upper Mississippi River




Resource managers are currently using reductions in the Upper Mississippi River’s (UMR) water levels during summer to mimic historical water levels and rehabilitate habitats for vegetation and desirable fauna. However, drawdowns may have adverse effects on native mussel populations. Over the past few years, systematic, pool-wide surveys of mussels in Pools 5, 6, and 18 have been conducted. The objective of this study was to characterize the effects of water level drawdown on the mortality, movement, and behavior of a common Lampsilini species, Lampsilis cardium, and a common Amblemini species, Amblema plicata, in Pool 6 of the UMR during 2009 and 2010. About 460 mussels were tagged and followed about weekly during June to November [...]



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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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