1. Department of Environmental Studies, Macalester College, St. Paul, Minnesota 55105
2. Department of Biology, St. Olaf College, Northfield, Minnesota 55057
3. Department of Biology, Macalester College, St. Paul, Minnesota 55105
4. Department of Biology, Ferrum College, Ferrum, Virginia 24088
5. Departments of Environmental Science and Biology, Carthage College, Kenosha, Wisconsin 53140
6. Department of Biology, Simmons University, Boston, Massachusetts 02115
7. Department of Botany and Microbiology, Ohio Wesleyan University, Delaware 43015
8. Department of Biology, Augustana College, Rock Island, Illinois 61201
9. Department of Biology and Geology, Beloit College, Beloit, Wisconsin 53511
10. Center for Earth and Environmental Science, State University of New York – Plattsburgh, Plattsburgh 12901