1. CREAF, Global Ecology Unit CREAF-CEAB-CSIC, Cerdanyola del Vallès, Catalonia, Spain
2. CSIC, Global Ecology Unit CREAF-CEAB-CSIC, UAB, Catalonia, Spain
3. School of Geography, Earth and Environmenttal Sciences, University of Birmingham Edgbaston, Birmingham, UK
4. INRA, ECOFUN team, UMR ISPA, Villenave d’Ornon, France