1. Centre for Applied Ecology, Instituto Superior de Agronomia, Universidade Técnica de Lisboa, Tapada da Ajuda, Lisboa, Portugal
2. WWF‐Mediterranean Program, Rome, Italy
3. Centre for Forest Research, Instituto Superior de Agronomia, Universidade Técnica de Lisboa, Tapada da Ajuda, Lisboa, Portugal
4. Centre d'Ecologie Fonctionnelle et Evolutive, Montpellier, France
5. Missouri Botanical Garden, St Louis, MO
6. Centro de Investigación sobre Desertificación, Spanish National Research Council, Valencia, Spain