1. Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB); Berlin Germany
2. Department of Limnology and Bio-Oceanography; University of Vienna; Vienna Austria
3. Stream Biofilm and Ecosystem Research Laboratory; Ècole Polytechnique Fédérale de Lausanne (EPFL); Lausanne Switzerland
4. WasserCluster Biological Station Lunz am See; Lunz am See Austria