1. ISOE—Institute for Social-Ecological Research, 60486 Frankfurt, Germany
2. Faculty of Geosciences and Geography, Institute of Physical Geography, Goethe University Frankfurt, 60438 Frankfurt, Germany
3. SBiK-F—Senckenberg Biodiversity and Climate Research Centre, 60486 Frankfurt, Germany
4. Department of Physical Geography, Stockholm University, SE-106 91 Stockholm, Sweden
5. Department of Natural Resources Sciences, School of Agriculture and Natural Resources Sciences, NUST—Namibia University of Science and Technology, Windhoek Private Bag 13388, Namibia
6. Biodiversity Research Centre, NUST—Namibia University of Science and Technology, 8 Johann Albrecht Street, Windhoek 9000, Namibia
7. Institute of Biochemistry and Biology, Plant Ecology and Nature Conservation, University of Potsdam, 14476 Potsdam, Germany