About the Authors

Denis Valle

drv4@duke.edu

Affiliation University Program in Ecology, Duke University, Durham, North Carolina, United States of America

James Clark

Affiliation Nicholas School of the Environment, Department of Biology, Department of Statistical Science, Duke University, Durham, North Carolina, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Reviewed and edited the manuscript: JC. Conceived and designed the experiments: DV. Analyzed the data: DV. Contributed reagents/materials/analysis tools: JC. Wrote the paper: DV.