About the Authors

Stefan A. Little

dslittle@ucdavis.edu

Affiliations Department of Geosciences, Pennsylvania State University, University Park, Pennsylvania, United States of America, Department of Plant Sciences, University of California Davis, Davis, California, United States of America

Steven W. Kembel

Affiliation Center for Ecology and Evolutionary Biology, University of Oregon, Eugene, Oregon, United States of America

Peter Wilf

Affiliation Department of Geosciences, 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: SAL SWK PW. Analyzed the data: SWK. Contributed reagents/materials/analysis tools: SAL. Wrote the paper: SAL SWK PW. Compiled File S1: PW.