1. Range Science Program, North Dakota State University, Fargo, ND 58108, USA
2. Department of Wildlife, Fisheries, and Aquaculture, Mississippi State University, Mississippi State University, MS 39762, USA
3. Department of Biochemistry, Molecular Biology, Entomology, & Plant Pathology, Mississippi State University, Mississippi State University, MS 39762, USA
4. Geosystems Research Institute, Mississippi State University, Mississippi State University, MS 39762, USA
5. Weyerhaeuser NR Company, Columbus, MS 39704, USA