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Supplemental Information

Additional Information

Competing Interests

Andrea Sundermann is an Academic Editor for PeerJ.

Author Contributions

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

Andrea Sundermann conceived and designed the experiments, contributed reagents/materials/analysis tools, reviewed drafts of the paper.

Stefan Stoll conceived and designed the experiments, contributed reagents/materials/analysis tools, reviewed drafts of the paper.

Peter Haase conceived and designed the experiments, contributed reagents/materials/analysis tools, reviewed drafts of the paper.

Data Deposition

The following information was supplied regarding data availability:

The research in this article did not generate any raw data.

Funding

This study was supported by Deutsche Bundesstiftung Umwelt (FK 25032-33 ⁄ 2), Hessisches Ministerium für Umwelt, ländlichen Raum und Verbraucherschutz (FK III 2-79i 02) and the research funding programme ‘LOEWE –Landes-Offensive zur Entwicklung Wissenschaftlich-ökonomischer Exzellenz’ of Hesse’s Ministry of Higher Education, Research, and the Arts. Data from the surrounding sites were kindly provided by Hessisches Landesamt für Umwelt und Geologie (HLUG) and Landesamt für Natur, Umwelt und Verbraucherschutz NRW (LANUV). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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