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Additional Information

Competing Interests

The authors declare that they have no competing interests.

Author Contributions

Stefanie Höckendorff analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Jonathan D Tonkin analyzed the data, contributed reagents/materials/analysis tools, prepared figures and/or tables, reviewed drafts of the paper.

Peter Haase contributed reagents/materials/analysis tools, reviewed drafts of the paper.

Margret Bunzel-Drüke performed the experiments, contributed reagents/materials/analysis tools, reviewed drafts of the paper.

Olaf Zimball performed the experiments, contributed reagents/materials/analysis tools, reviewed drafts of the paper.

Matthias Scharf performed the experiments, contributed reagents/materials/analysis tools, reviewed drafts of the paper.

Stefan Stoll conceived and designed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Field Study Permissions

The following information was supplied relating to field study approvals (i.e., approving body and any reference numbers):

ABU holds all necessary electrofishing permits issued by the Environmental Authority of the District Soest.

As this is a long-term study using data from multiple sites over 21 years, data were collected under a multitude of electrofishing permits, and therefore, we cannot present them individually here.

Data Deposition

The following information was supplied regarding data availability:

Raw data is available through the District Council of Arnsberg, Germany.

Funding

The authors received no funding for this work.


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