[1] Univ Arizona, Tucson, AZ 85721 USA
[2] Texas A&M Univ, College Stn, TX 77843 USA
[3] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[4] USDA, ARS, SW Watershed Res Ctr, Tucson, AZ 85719 USA
[5] USDA, ARS, Jornada Expt Range, Las Cruces, NM 88003 USA
[6] Univ Colorado, Boulder, CO 80309 USA
[7] Univ Utah, Dept Biol, Salt Lake City, UT 84112 USA
[8] Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA
[9] Duke Univ, Dept Biol, Durham, NC 27708 USA
[10] Duke Univ, Nicholas Sch Environm & Earth Sci, Durham, NC 27708 USA