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Invasive trees in our catchments

In South Africa, invasive plants such as pine trees and Australian acacias reduce surface water runoff by between 1 500 to 2 500 million cubic metres per year. That is equivalent to the capacity of the Pongolapoort Dam in KwaZulu-Natal. What is being done to address this problem, and how successful are these efforts? Dave Pepler asks a few difficult questions to Prof Brian van Wilgen (DST-NRF Centre of Excellence for Invasion Biology), Dr David le Maitre (CSIR) and Dr Christine Colvin (WWF), during the last Science Café Stellenbosch for Woordfees 2019. <ul><li>Science Café Stellenbosch is an initiative of SU's Faculty of Science to promote discussion of scientific issues in a language that everyone can understand.</li><li>Entrance is free, but arrive in time to order a glass of wine before you find your seat.</li><li>This discussion will take place mainly in English, but questions in Afrikaans are welcome and will be answered in Afrikaans, where possible. </li><li>Follow us on Facebook for more interesting stories and information about science in general - https://www.facebook.com/ScienceCafeStellenbosch/ </li></ul>