1. Department of Geography and Environmental Studies, University of Limpopo, Private Bag X1106, Sovenga 0727, South Africa
2. Risk and Vulnerability Science Centre (RVSC), University of Limpopo, Private Bag X1106, Sovenga 0727, South Africa
3. Institute of Water Studies, Department of Earth Science, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa
4. International Centre of Insect Physiology and Ecology (icipe), Nairobi P.O. Box 30772-00100, Kenya
5. School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, Private Bag 3, Johannesburg 2050, South Africa