About the Authors

Patrick M. Edwards

patrick.edwards@pdx.edu

Affiliation Portland State University, Environmental Sciences and Management, Portland, Oregon, United States of America

Competing Interests

The author has declared that no competing interests exist.

Author Contributions

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