1. Department of Ecology University of Innsbruck Innsbruck Austria
2. Department of Biogeochemical Processes Max Planck Institute for Biogeochemistry Jena Germany
3. Department of Botany University of Innsbruck Innsbruck Austria
4. Hawkesbury Institute for the Environment Western Sydney University Richmond New South Wales Australia
5. Department of Alpine Timberline Ecophysiology, Federal Research and Training Centre for Forests Natural Hazards and Landscape (BFW) Innsbruck Austria