About the Authors

Ariel E. Marcy

aemarcy@gmail.com

Affiliation Department of Biology, Stanford University, Stanford, California, United States of America

Scott Fendorf

Affiliation Department of Environmental Earth Systems Science, Stanford University, Stanford, California, United States of America

James L. Patton

Affiliation Museum of Vertebrate Zoology, University of California, Berkeley, California, United States of America

Elizabeth A. Hadly

Affiliation Department of Biology, Stanford University, Stanford, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AEM EAH SF JLP. Performed the experiments: AEM. Analyzed the data: AEM EAH SF. Wrote the paper: AEM EAH SF JLP.