About the Authors

Rachel C. Johnson

rbarnettjohnson@usbr.gov

Current address: Bay Delta Office, U.S. Bureau of Reclamation, Sacramento, California, United States of America

Previously published as Rachel Barnett-Johnson.

Affiliation Institute of Marine Sciences, University of California Santa Cruz, Santa Cruz, California, United States of America

Peter K. Weber

Affiliation Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, California, United States of America

John D. Wikert

Affiliation Anadromous Fish Restoration Program, United States Fish and Wildlife Service, Stockton, California, United States of America

Michelle L. Workman

Current address: Anadromous Fish Restoration Program, U.S. Fish and Wildlife Service, Stockton, California, United States of America

Affiliation East Bay Municipal Utility District, Lodi, California, United States of America

R. Bruce MacFarlane

Affiliation Southwest Fisheries Science Center, National Marine Fisheries Service, Santa Cruz, California, United States of America

Marty J. Grove

Current address: Department of Geological and Environmental Sciences, Stanford University, Stanford, California, United States of America

Affiliation Department of Earth and Space Sciences, University of California Los Angeles, Los Angeles, California, United States of America

Axel K. Schmitt

Affiliation Department of Earth and Space Sciences, University of California Los Angeles, Los Angeles, California, United States of America

Competing Interests

MW was employeed by East Bay Municipal Utility District (EBMUD) during the project period and coordinated sample collection as part of EBMUD's salmon monitoring program. Sampling design was conceived by grantees. This collaboration does not alter the authors′ adherence to all the PLoS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: RCJ PW JW MW. Analyzed the data: RCJ PW AS. Wrote the paper: RCJ PW. Performed chemical analyses: RCJ PW MG AS. Contributed analysis tool: RBM. Project management: RBM.