Affiliation: | 1. Council for Scientific and Industrial Research, Natural Resources and the Environment, Stellenbosch, South Africa;2. Sustainability Research Unit, NMMU, George, South Africa;3. Scientific Services, South African National Parks, George, South Africa;4. South African National Biodiversity Institute, Claremont, South Africa;5. Council for Scientific and Industrial Research, Natural Resources and the Environment, Pretoria, South Africa;6. Freshwater Consulting Group, Scarborough, South Africa |