1. Johann Wolfgang Goethe University, Frankfurt am Main, Institute of Ecology, Evolution and Diversity, Frankfurt am Main, Germany,
2. Federal Environmental Agency, Section Ecological Assessment of Substances, Dessau, Germany
3. Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Department of Inland Fisheries, Berlin, Germany
4. Federal Institute of Hydrology, Koblenz, Germany