David D. Breshears,¹ Alan K. Knapp,² Darin J. Law,³ Melinda D. Smith,⁴ Dirac Twidwell,⁵ Carissa L. Wonkka<sup>6

1</sup>Authors are Professor, School of Natural Resources and the Environment, University of Arizona, Tucson, AZ 875721 USA (Breshears,) daveb@email.arizona.edu
²Professor, Department of Biology, Graduate Degree Program in Ecology, Colorado State University, Fort Collins, CO 80523 USA (Knapp)
³Sr. Research Specialist, School of Natural Resources and the Environment, University of Arizona, Tucson, AZ 875721 USA (Law)
⁴Professor, Department of Biology, Graduate Degree Program in Ecology, Colorado State University, Fort Collins, CO 80523 USA (Smith)
⁵Assistant Professor,Department of Agronomy and Horticulture, University of Nebraska, Lincoln, NE 68583 USA (Twidwell)
⁶Postdoctoral Research Associate, Department of Agronomy and Horticulture, University of Nebraska Lincoln, Lincoln NE 68583 USA (Wonkka). This paper was supported by NSF (EF-1340624; EF-1550756; EAR-1331408) and the Arizona Agriculture Experiment Stat