1. Department of Geography University of Cambridge CB2 3EN Cambridge UK
2. Swiss Federal Research Institute WSL 8903 Birmensdorf Switzerland
3. Global Change Research Centre and Masaryk University Brno 613 00 Brno Czech Republic
4. Department of Wildlife and Fishery Service Grisons 7001 Chur Switzerland
5. Northern Research Station USDA Forest Service Morgantown West Virginia 26505 USA
6. Centre for Ecological and Evolutionary Synthesis CEES University of Oslo Blindern 0316 Oslo Norway