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Welcome to the Dan Hornbach Research Laboratory Home Page 

This Web Page belongs to Dr. Daniel J. Hornbach, Professor of Biology at Macalester College. It was primarily started in an attempt to facilitate information search and retrieval for individuals within the Macalester College Department of Biology. 
The "Mussel Movie" - Made for the Admissions Dept. @ Mac
NEW!
Collaborative Project with The Saint Croix National Scenic Riverway National Park


Project Title: Modeling Sediment Dynamics in the St. Croix River and the Impact on Federally Endangered Mussels [2008-2010] - Dan Hornbach, Kelly MacGregor, Mark Hove

Description

Recent studies have shown that juvenile mussel density is decreasing in native mussel communities that harbor Federally-listed mussel species. These declines have been accompanied by increased sediment deposition at these locations. One location is listed as an Essential Habitat Area in the Higgins Eye Recovery Plan. Other monitoring sites on the river have not experienced the decline in juvenile mussels or the increase in sediment deposition. Those sites which have seen declines are found in a 10-mile stretch of river downstream of a hydroelectric dam at St. Croix Falls, Wisconsin. This project will help resource managers understand the forces which may be leading to the changes in sedimentation rates. A model of the relationship between discharge and sediment transport will be developed, suspended sediment transport will be monitored, and sediment cores from the reservoir above the dam will be examined, as will the forces of shear-stress above and below the dam.


Last updated: 11/26/2007
Send comments and questions to: hornbach@macalester.edu
 


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