Anne E. Hershey (e-mail: Anne_Hershey@uncg.edu) is Julia -Taylor Morton Distinguished Professor and head of Biology at the University of North Carolina-Greensboro, NC 27402-6174. Gretchen M. Gettel was a master's student with Hershey at the University of Minnesota-Duluth and is now a PhD student at Cornell University, Ithaca, NY 14853. Michael E. McDonald is director of the Environmental Monitoring and Assessment Program at the US Environmental Protection Agency National Health and Environmental Effects Research Laboratory, Research Triangle Park, NC 27711. Michael C. Miller is a professor of Biological Sciences at the University of Cincinnati, Cincinnati, OH 45221. Howard Mooers is an associate professor of Geology at the University of Minnesota-Duluth, MN 55812. W. John O'Brien is a professor of Systematics and Ecology at the University of Kansas, Lawrence, KS 66045. John Pastor is a professor of Biology and a senior research associate, Carl Richards is a senior research associate, and Jeff A. Schuldt is a postdoctoral associate at the Natural Resources Research Institute in Duluth, MN 55811.