1. Department of Ecohydrology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries; Berlin Germany
2. Department of Biology, Chemistry, and Pharmacy, Institute of Biology; Freie Universität Berlin; Berlin Germany
3. De Vlinderstichting/Dutch Butterfly Conservation; Wageningen The Netherlands
4. Department of Geodesy, GFZ German Research Centre for Geosciences; Potsdam Germany
5. Environmental Campus Birkenfeld, University of Applied Sciences Trier; Birkenfeld Germany
6. Department of Aquatic Ecology; University of Duisburg-Essen; Essen Germany