1. Professor of botany, Duke University, Durham NC 27706
2. Professor in Systems Ecology Research Group, San Diego State University, San Diego, CA 92182
3. Professor in Department of Biology, New Mexico State University, Las Cruces, NM88003
4. Assistant Professor in Department of Biology, New Mexico State University, Las Cruces, NM88003
5. Associate Professor in the Department of Environmental Science and Engineering, The Oregon Graduate Institute of Science and Technology, Beaverton, OR 97006