1. Biodiversity and Conservation Biology Swiss Federal Research Institute WSL Zürcherstrasse 111 Birmensdorf 8903 Switzerland
2. Nature Conservation and Landscape Ecology University of Freiburg Tennenbacher Straße 4 Freiburg 79106 Germany
3. Laboratory of Functional Ecology Institute of Biology University of Neuchâtel Rue Emile‐Argand 11 Neuchâtel 2000 Switzerland
4. Department of Botany Faculty of Sciences University of South Bohemia Na Zlate Stoce 1 České Budějovice 370 05 Czech Republic
5. Desertification Research Centre (CIDE‐CSIC) Carretera Moncada‐Náquera, Km 4,5 Moncada (Valencia) 46113 Spain
6. Department of Aquatic Ecology Eawag, Swiss Federal Institute of Aquatic Science and Technology Überlandstrasse 133 Dübendorf 8600 Switzerland