1. University of Freiburg Institute of Forest Sciences, Faculty of Environment and Natural Resources, , Tennenbacherstrasse 4, 79106 Freiburg , Germany
2. Bangor University Environment Centre Wales, School of Natural Sciences, , Bangor, Gwynedd LL57 2DG , United Kingdom
3. University of Trás-os-Montes and Alto Douro (UTAD) Centre for Research and Technology of Agro-Environmental and Biological Sciences (CITAB), Inov4Agro, , Quinta de Prados, 5000-801 Vila Real , Portugal
4. CSIRO Environment , GPO Box 1700, Canberra, ACT 2601 , Australia