1. Faculty of Natural Resources and Spatial Sciences, Namibia University of Science and Technology, Windhoek, Namibia
2. Division of Forest, Nature and Landscape, University of Leuven, Leuven, Belgium
3. Tropical Plant Production and Agricultural Systems Modelling, Department of Crop Sciences, Georg-August-Universität Göttingen, Göttingen, Germany
4. Service of Wood Biology, Royal Museum for Central Africa, Tervuren, Belgium
5. School of Applied and Biomedical Sciences, Federation University of Australia, Ballarat, Victoria, Australia
6. Department of Applied Biosciences, Ghent University, Gent, Belgium