JAKE F. WELTZIN,^* MICHAEL E. LOIK,^** SUSANNE SCHWINNING,^*** DAVID G. WILLIAMS,^**** PHILIP A. FAY,^***** BRENT M. HADDAD,^****** JOHN HARTE,^******* TRAVIS E. HUXMAN,^******** ALAN K. KNAPP,^********* GUANGHUI LIN,^********** WILLIAM T. POCKMAN,^*********** M. REBECCA SHAW,^************ ERIC E. SMALL,^{*************} MELINDA D. SMITH,^{**************} STANLEY D. SMITH,^{***************} DAVID T. TISSUE,^{****************} JOHN C. ZAK<sup>*****************


*</sup>Jake F. Weltzin (jweltzin@utk.edu) is an assistant professor in the Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN 37919.
^**Michael E. Loik is an assistant professor in the Department of Environmental Studies, University of California, Santa Cruz, CA 95064.
^***Brent M. Haddad is an associate professor in the Department of Environmental Studies, University of California, Santa Cruz, CA 95064.
^****Susanne Schwinning is a postdoctoral associate at the Biosphere 2 Center, Columbia University, Oracle, AZ 85623.
^*****Guanghui Lin is an associate research scientist at the Biosphere 2 Center, Columbia University, Oracle, AZ 85623.
^******David G. Williams is an associate professor in the Departments of Renewable Resources and Botany, University of Wyoming, Laramie, WY 82071.
^*******Philip A. Fay is a plant ecologist at the Natural Resources Research Institute, Duluth, MN 55811.
^********John Harte is a professor in the Energy and Resources Group, University of California, Berkeley, CA 94720.
^*********Travis E. Huxman is an assistant professor in the Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721.
^**********Alan K. Knapp is a professor in the Division of Biology, Kansas State University, Manhattan, KS 66506.
^***********William T. Pockman is an assistant professor in the Department of Biology, University of New Mexico, Albuquerque, NM 87131.
^************M. Rebecca Shaw is a researcher in the Department of Global Ecology, Carnegie Institution of Washington, 260 Panama Street, Stanford, CA 94305.
^{*************}Eric E. Small is an assistant professor in the Department of Geological Sciences, University of Colorado, Boulder, CO 80309.
^{**************}Melinda D. Smith is a postdoctoral fellow at the National Center for Ecological Analysis and Synthesis, Santa Barbara, CA 93101.
^{***************}Stanley D. Smith is a professor in the Department of Biological Sciences, University of Nevada, Las Vegas, NV 89154.
^{****************}David T. Tissue is an associate professor in the Department of Biological Sciences, Texas Tech University, Lubbock, TX 79409.
^{*****************}John C. Zak is a professor in the Department of Biological Sciences, Texas Tech University, Lubbock, TX 79409.