About the Authors

Julia Birtel

julia.birtel@eawag.ch

Affiliations Eawag, Department of Aquatic Ecology, Kastanienbaum, Switzerland, Department of Environmental Systems Sciences (D-USYS), Swiss Federal Insitute of Technology (ETH), Zürich, Switzerland

Jean-Claude Walser

Affiliation Genetic Diversity Centre (GDC), Department of Environmental System Sciences (D-USYS), Swiss Federal Institute of Technology (ETH), Zürich, Switzerland

Samuel Pichon

Affiliation Department of Environmental Sciences, Zoology and Evolution, Universität Basel, Basel, Switzerland

Helmut Bürgmann

Affiliation Eawag, Department of Surface Waters, Kastanienbaum, Switzerland

Blake Matthews

Affiliation Eawag, Department of Aquatic Ecology, Kastanienbaum, Switzerland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JB BM HB. Performed the experiments: JB. Analyzed the data: JB BM JCW SP. Contributed reagents/materials/analysis tools: JCW SP HB. Wrote the paper: JB BM JCW SP.