1. WasserCluster Lunz – Biological Station GmbH, Dr. Carl Kupelwieser Promenade 5, 3293 Lunz am See, Austria
2. University of Vienna, Department of Functional and Evolutionary Ecology, Althanstraße 14, 1090 Vienna, Austria
3. University of Georgia, Skidaway Institute of Oceanography, 10 Ocean Science Circle, Savannah, GA 31411, USA
4. Department of Experimental Limnology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Zur alten Fischerhütte 2, D-16775 Stechlin, Germany