Dean W. R. J., Milton S. J., The dispersal and spread of invasive alien Myrtillocactus geometrizans in the southern Karoo, South Africa, South African Journal of Botany, 2019, 121:210-215, doi: 10.1016/j.sajb.2018.11.005
The study describes cactus spread into natural vegetation near Prince Albert. Its survey recorded the location and size of 156 plants. The authors associate the slow invasion with delayed maturation and episodic recruitment, and identify roles for birds and shelter from indigenous shrubs. Consultation covered the abstract and publisher highlights.