1. Department of Biology West Virginia University 53 Campus Drive Morgantown West Virginia 26506 USA
2. USDA Forest Service Northern Research Station 180 Canfield Street Morgantown West Virginia 26505 USA
3. Division of Plant and Soil Sciences, 4100 Agricultural Sciences Building P.O. Box 6108 Morgantown West Virginia 26506 USA
4. Department of Biology Gettysburg College 300 North Washington Street Gettysburg Pennsylvania 17325 USA
5. Department of Biological Sciences University of Pittsburgh 4249 Fifth Avenue Pittsburgh Pennsylvania 15260 USA
6. Department of Natural Resource Management South Dakota State University, 1390 College Avenue, South Dakota State University Brookings South Dakota 57007 USA
7. Department of Biological Sciences University of Alabama 300 Hackberry Lane Tuscaloosa Alabama 35487 USA