About the Authors

Jason M. Gleditsch

gledits2@illinois.edu

Current address: Department of Natural Resources and Environmental Sciences, University of Illinois, Urbana, Illinois, United States of America

Affiliation Department of Biology and Intercollege Graduate Degree in Ecology, The Pennsylvania State University, University Park, Pennsylvania, United States of America

Tomás A. Carlo

Affiliation Department of Biology and Intercollege Graduate Degree in Ecology, The Pennsylvania State University, University Park, Pennsylvania, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JMG TAC. Performed the experiments: JMG. Analyzed the data: JMG TAC. Contributed reagents/materials/analysis tools: JMG TAC. Contributed to the writing of the manuscript: JMG TAC. Obtained appropriate permissions: JMG.