We thank Jon Ervin, Pam Woodruff, Nina Consolatti, Andrea Case, and Katherine Syverson for their assistance in the field and Allison Snow and Jim Teeri for critical scientific and material assistance. This research was supported with funds from the Ohio State University, an NSF predoctoral fellowship to D.J.K., NSF Grant CIR-9113598 to the Kellogg Biological Station, Michigan State University, the University of Michigan Biological Station, and the University of Michigan Project for the Integrated Study of Global Change.

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