Upper Midwest Environmental Sciences Center
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Theler, J. L. (1987). Prehistoric freshwater mussel assemblages of the Mississippi River in southwestern Wisconsin. Nautilus. 101:143-150.
Archaeological excavations at aboriginal sites adjacent to the Upper Mississippi River (UMR) in southwestern Wisconsin produced a series of freshwater mussel (naiad) assemblages. These subfossil mussel valves are the remains of mollusks harvested as a food source by prehistoric peoples between circa A.D. 1 and A.D. 1000. The aboriginal assemblages provide an approximation of the regions' main stem UMR naiad communities during the latter part of the prehistoric era. A quantitative comparison of the subfossil collection with modern mussel survey data documents dramatic changes in the species composition of molluscan communities following habitat degradation of the UMR associated with EuroAmerican settlement.
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.umesc.usgs.gov/URL: http://www.umesc.usgs.gov/data_library/fisheries/fish_passage/theler.html
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