1. University of Tennessee, Knoxville, United States of America
2. Trinity College Dublin, Dublin, Ireland
3. Technische Universität München, Freising, Germany
4. Chair of Nature Conservation and Landscape Ecology, Albert-Ludwigs-University Freiburg, Freiburg, Germany
5. University of Liege, Gembloux Agro-Bio Tech, Gembloux, Belgium
6. CEFE, Univ Montpellier, CNRS, EPHE, IRD, Montpellier, France
7. University of Mons, Mons, Belgium