1. Department of Plant Ecology; University of Bayreuth; Bayreuth; Germany
2. Institute of Ecology and Resource Management (IERM); Edinburgh University; Edinburgh; UK
3. Max-Planck-Institute for Biogeochemistry; Jena; Germany
4. Department of Forest Science and Environment; University of Tuscia; Viterbo; Italy
5. Instituto Superior de Agronomia; Lisbon; Portugal
6. Centre Tecnologic Forestal de Catalunya; Solsona; Spain
7. Global Change Research Group; San Diego State University; San Diego; California; USA
8. Department of Environmental Sciences and Energy Research; Weizmann Institute of Science; Rehovot; Israel
9. College of Forestry; Oregon State University; Corvallis; Oregon; USA
10. DREAM Unit; Centre d'Ecologie Fonctionelle et Evolutive, CNRS; Montpellier; France
11. Institut National de la Recherche Agronomique (INRA); Recherches Forestieres; Gazinet; France
12. Istituto di Biometeorologia (IBIMET); Firenze; Italy
13. Departament de Producción Vegetal y Tecnología Agraria (DPVTA), Facoltà di Agraria; Università di Udine; Udine; Italy
14. Università di Bologna; Bologna; Italy
15. Department of Environmental Science, Policy, and Management; University of California, Berkeley; Berkeley; California; USA
16. Departament Biologia Vegetal; Universitat de Barcelona; Barcelona; Spain
17. Department of Ecology, Evolution and Natural Resources; Rutgers University; New Brunswick; New Jersey; USA