1. Department of Conservation Ecology and Entomology Stellenbosch University Stellenbosch South Africa
2. Ecosystem Management Research Group (ECOBE), Department of Biology University of Antwerp Wilrijk Belgium
3. Invasive Species Unit SANBI South Africa
4. Department of Botany and Zoology Stellenbosch University Stellenbosch South Africa
5. Department of Biological Sciences University of Cape Town Rondebosch South Africa