1. Ecology Intercollege Graduate Degree Program, The Pennsylvania State University, University Park, PA, USA
2. Department of Plant Sciences, The Pennsylvania State University, University Park, PA, USA
3. Department of Geography, The Pennsylvania State University, University Park, PA, USA
4. Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN, USA
5. Smithsonian Conservation Biology Institute, Front Royal, VA, USA
6. Smithsonian Environmental Research Center, Edgewater, MD, USA
7. United States Department of Agriculture Forest Service, Northern Research Station, Irvine, PA, USA
8. Department of Ecosystem Science and Management, The Pennsylvania State University, University Park, PA, USA
9. Department of Extension, The Ohio State University, Jackson, OH, USA
10. Department of Natural Resources, Cornell University, Ithaca, NY, USA
11. Department of Biology, Hood College, Frederick, MD, USA
12. Soil and Crop Sciences Section, Cornell University, Ithaca, NY, USA
13. National Park Service, Morristown National Historical Park, Morristown, NJ, USA
14. Natural Area Consultants, Richford, NY, USA