About the Authors

Krissi M. Hewitt

Affiliation Department of Biology, San Diego State University, San Diego, California, United States of America

Frank L. Mannino

Affiliation University of San Diego Medical Center, San Diego, California, United States of America

Antonio Gonzalez

Affiliation Department of Computer Science, University of Colorado at Boulder, Boulder, Colorado, United States of America

John H. Chase

Affiliation Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona, United States of America

J. Gregory Caporaso

Affiliations Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona, United States of America, Department of Computer Science, Northern Arizona University, Flagstaff, Arizona, United States of America, Institute for Genomics and Systems Biology, Argonne National Laboratory, Argonne, Illinois, United States of America

Rob Knight

Affiliations Department of Chemistry and Biochemistry, University of Colorado at Boulder, Boulder, Colorado, United States of America, Howard Hughes Medical Institute, Boulder, Colorado, United States of America

Scott T. Kelley

skelley@sciences.sdsu.edu

Affiliation Department of Biology, San Diego State University, San Diego, California, United States of America

Competing Interests

A few of the samples the authors collected in this study were used as sequence test datasets for the published SourceTracker software. The data were used to test the viability, accuracy and reproducibility of the SourceTracker method and were not discussed any further in that paper. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Designed software used in analysis: JGC RK STK. Conceived and designed the experiments: STK FLM KMH. Performed the experiments: KMH. Analyzed the data: STK JGC RK KMH AG JHC. Contributed reagents/materials/analysis tools: JGC RK FLM AG JHC. Wrote the paper: KMH STK JGC.