1. Department of Limnology & Bio-Oceanography; University of Vienna; Vienna Austria
2. Biofilm and Ecosystem Research Group; WasserCluster Lunz Biologische Station GmbH; Lunz am See Austria
3. Department of Ecohydrology; Leibniz-Institute of Freshwater Ecology & Inland Fisheries (IGB); Berlin Germany
4. Stream Biofilm and Ecosystem Research Laboratory, School of Architecture, Civil and Environmental Engineering; École Polytechnique Fédérale de Lausanne; Lausanne Switzerland