About the Authors

Jan Beck

jan.beck@unibas.ch

Affiliation Department of Environmental Sciences, University of Basel, Basel, Switzerland

Andrea Sieber

Affiliation Department of Environmental Sciences, University of Basel, Basel, Switzerland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JB AS. Performed the experiments: JB AS. Analyzed the data: JB. Wrote the paper: JB.