A recent research article in Biological Conservation
132 ( 2006 ) 183 –198 by Alston KP and Richardson DM deals with alien invasive plants in Newlands Forest, Cape Town. The “edge effect” of an urban/wildland interface was studied. They found a significant correlation between the distance from supposed source populations (mainly sub-urban gardens) and alien species richness in different habitats of Newlands Forest as well as a significant correlation between alien species richness and the level of disturbance.
To read more follow the link http://academic.sun.ac.za/cib/publications2006.htm
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