1. Department of Life Sciences, Centre for Functional Ecology, University of Coimbra, PO Box 3046, Coimbra 3001-455, Portugal
2. Centro de Investigação em Biodiversidade e Recursos Genéticos (CIBIO), Vairão, Portugal
3. Estación Biológica de Doñana (EBD-CSIC), Sevilla, Spain
4. Mediterranean Institute of Advanced Studies (UIB-CSIC), Mallorca, Balearic Islands
5. Departamento de Ecología Funcional y Evolutiva, Estación Experimental de Zonas Áridas (EEZA-CSIC), Almería, Spain
6. Department of Biology, Technische Universität Darmstadt, Darmstadt, Germany
7. School of Biological Sciences, University of Bristol, Bristol, UK
8. Department of Botany, Institute of Ecology and Earth Sciences, University of Tartu, Tartu, Estonia
9. Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Lisbon, Portugal
10. Department of Bioscience, Aarhus University, Aarhus, Denmark