1. U.S. Geological Survey; Northern Rocky Mountain Science Center; Southern Appalachian Research Branch; University of Tennessee; 274 Ellington Plant Sciences Building; Knoxville TN 37996 USA
2. Department of Forestry; University of Tennessee; Wildlife and Fisheries; 274 Ellington Plant Sciences Building; Knoxville TN 37996 USA
3. Louisiana Department of Wildlife and Fisheries; P.O. Box 98000; 2000 Quail Dr.; Baton Rouge LA 70898 USA
4. Department of Environmental Science and Technology; University of Maryland; 0214 Symons Hall; College Park; MD 20742 USA