1. CREAF (Center for Ecological Research and Forestry Applications), Autonomous University of Barcelona, ES–08193 Bellaterra, Spain
2. Department of Ecology and Environmental Science, Umeå University, SE–901 87 Umeå, Sweden
3. Université Montpellier 2, Institut des Sciences de l’Evolution, UMR CNRS 5554, Place Eugène Bataillon, F–34095 Montpellier cedex 05, France
4. Animal Ecology Group, Centre for Ecological and Evolutionary Studies, University of Groningen, PO Box 14, NL–9750 AA Haren, The Netherlands
5. Association Tela Botanica, Institut de Botanique, 163 Rue Auguste Broussonnet, F–34090 Montpellier, France
6. Population and Conservation Genetics, Theoretical Biology, University of Groningen, PO Box 14, NL–9750 AA Haren, The Netherlands
7. Plant Research International, Wageningen UR, PO Box 16, NL–6700 AA Wageningen, The Netherlands