1. Centre for Invasion Biology; Stellenbosch University; Stellenbosch South Africa
2. Department of Conservation Ecology and Entomology; Stellenbosch University; Stellenbosch South Africa
3. Freshwater Research Centre; Scarborough South Africa
4. DST/NRF Research Chair in Shallow Water Ecosystems; Nelson Mandela Metropolitan University; Port Elizabeth South Africa
5. University of Cape Town; Rondebosch Cape Town South Africa