1. RISØ National Laboratory for Sustainable Energy, Biosystems Department; Technical University of Denmark; Roskilde; Denmark
2. Centre for Ecology and Hydrology; Environment Centre Wales; Bangor; UK
3. Center for Geo-ecological Research, Institute for Biodiversity and Ecosystem Dynamics; University of Amsterdam; Amsterdam; Netherlands
4. Forest and Landscape; University of Copenhagen; Hørsholm; Denmark
5. Unitat Ecofisiologia i Canvi Global CSIC-CEAB-CREAF, CREAF, Facultat de Ciències; Universitat Autònoma de Barcelona; Barcelona; Spain
6. Institute of Ecology and Botany; Hungarian Academy of Sciences; Vácrátót; Hungary
7. Institute of Biometeorology; Sassari; Italy
8. Department of Forest Environment and Resources; University of Tuscia; Viterbo; Italy
9. Plant Research International; Wageningen; Netherlands
10. Department of Botany, Institute of Ecology and Earth Sciences; University of Tartu; Tartu; Estonia
11. Mols Laboratory; National History Museum; Ebeltoft; Denmark
12. Department of Economics and Tree Crops; University of Sassari, EuroMediterranean Center for Climate Change; Sassari; Italy