1. Biodiversity, Evolution and Ecology (BEE), Inst. of Plant Sciences and Microbiology, Univ. of Hamburg Hamburg Germany
2. Forest Nature Conservation, Burckhardt Inst., Georg‐August‐Univ. Göttingen Göttingen Germany
3. Biodiversity Research Center, Faculty of Natural Resources and Spatial Sciences, Namibia Univ. of Science and Technology Windhoek Namibia