1. Ecology Group Technische Universität Kaiserslautern Kaiserslautern Germany
2. Limnological Station Department of Plant and Microbial Biology University of Zurich Kilchberg Switzerland
3. Laboratory of Soil Biodiversity University of Neuchâtel Neuchâtel Switzerland
4. Research Department for Limnology Mondsee, University of Innsbruck Mondsee Austria
5. Department of Functional and Evolutionary Ecology University of Vienna Vienna Austria