About the Authors

Jonathan W. Leff

Affiliation Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado, United States of America

Noah Fierer

Noah.Fierer@colorado.edu

Affiliations Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado, United States of America, Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, Colorado, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JWL NF. Performed the experiments: JWL. Analyzed the data: JWL NF. Contributed reagents/materials/analysis tools: NF. Wrote the paper: JWL NF.