1. Department of Biology and Earth sciences, Royal Museum for Central Africa, Tervuren, Belgium
2. Department of Earth and Environmental Sciences, Division of Bioeconomics, KU Leuven, Leuven, Belgium
3. Ecology & Biodiversity, Plant Science and Nature Management Research Unit, Department of Biology, Vrije Universiteit Brussel, Brussels, Belgium
4. Systems Ecology & Resource Management Unit, Department of Organism Biology, Université Libre de Bruxelles, Brussels, Belgium
5. Institute of Biological & Environmental Science, University of Aberdeen, Aberdeen, UK
6. Department of Ecology, Swedish University of Agricultural Science, Uppsala, Sweden
7. Department of Geography, Birkbeck University of London, London, UK
8. School of Life Sciences, University of KwaZulu-Natal, Pietermaritzburg, South Africa
9. Department of Environmental Sciences, Open University of the Netherlands, Heerlen, The Netherlands
10. Centre for Environmental Science, University of Hasselt, Hasselt, Belgium