1. Department of Geography/Geology University of Nebraska Omaha Omaha NE USA
2. Department of Forestry Forest and Wildlife Research Center Mississippi State University Starkville MS USA
3. Department of Geography and Spatial Sciences University of Delaware Newark DE USA
4. Department of Natural Resources Science University of Rhode Island South Kingstown RI USA
5. Department of Geology University of Vermont Burlington VT USA
6. Department of Plant and Soil Sciences University of Delaware Newark DE USA