About the Authors

Robert H. Diehl

rhdiehl@usgs.gov

Affiliation U.S. Geological Survey (USGS), Northern Rocky Mountain Science Center, Bozeman, Montana, United States of America

Ernest W. Valdez

Affiliation USGS, Fort Collins Science Center, Fort Collins, Colorado, United States of America

Todd M. Preston

Affiliation U.S. Geological Survey (USGS), Northern Rocky Mountain Science Center, Bozeman, Montana, United States of America

Michael J. Wellik

Affiliation USGS, Upper Midwest Environmental Science Center, La Crosse, Wisconsin, United States of America

Paul M. Cryan

Affiliation USGS, Fort Collins Science Center, Fort Collins, Colorado, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: RHD PMC EWV. Performed the experiments: RHD PMC EWV. Analyzed the data: RHD PMC EWV TMP MJW. Contributed reagents/materials/analysis tools: RHD PMC EWV MJW. Wrote the paper: PMC RHD EWV TMP MJW.