About the Authors

Hsiang Ling Chen

hchen@mail.sdsu.edu

Affiliation School of Natural Resources and the Environment, The University of Arizona, Tucson, Arizona, United States of America

John L. Koprowski

Affiliation School of Natural Resources and the Environment, The University of Arizona, Tucson, Arizona, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

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