Acknowledgments
We thank Paula MorĂ£o and Luis Moreno for assistance in field logistics, field work, and labwork; Vinicius Hansser, Amanda Piffer, and Cesar Alexandre for assistance in the field; Carlos Almeida for providing site coordinates; Molly Bletz, Alisha Quandt, and William Davis for assistance with bioinformatics and data analysis; and Kelly Zamudio and Celio Haddad for assistance with fieldwork planning. We also thank members of the James Lab at the University of Michigan, Sabah Ul-Hasan, and Meg Duffy for valuable comments on early versions of the manuscript. We wish to acknowledge funding from NSF (OISE-1159513), CNPq (300980/2014-0), and a Block Grant from the U. Michigan Dept. of Ecology and Evolutionary Biology.