About the Authors
Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona, United States of America
The authors have declared that no competing interests exist.
HED, ACCW, and NAM conceived and designed the experiments. HED, ACCW, NRF, and NAM performed the experiments. HED, ACCW, and NAM analyzed the data. ACCW and NAM contributed reagents/materials/analysis tools, and wrote the paper.