1. Department of Ecology, Faculty of Science, Charles University, Prague, Czech Republic
2. Stream Biofilm and Ecosystem Research Laboratory, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
3. Research Department, Meise Botanic Garden, Meise, Belgium
4. Department of Biology, University of Antwerp, Antwerp, Belgium
5. Department of the Environment and Energy, Australian Antarctic Division, Kingston, Australia
6. Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Australia