1. WSL-Institute for Snow and Avalanche Research (SLF); Davos Switzerland
2. Department of Arctic and Marine Biology; The Arctic University of Norway; Tromsø Norway
3. Swiss Federal Institute for Forest, Snow and Landscape Research WSL; Birmensdorf Switzerland
4. Department of Agricultural, Forest and Food Sciences; University of Turin; Grugliasco Italy
5. Institute of Botany; University of Basel; Basel Switzerland
6. Faculty of Regional and Environmental Sciences - Geobotany; University of Trier; Trier Germany