Harnessing Ecosystem Services from Invasive Alien Grass and Rush Species to Suppress their Aggressive Expansion in South Africa

Abstract

Invasive alien species are regarded as one of the major driving forces of species extinction worldwide. To counteract the invasion’s spread and minimize species extinction risk, countries like South Africa are devoted to halting human-induced invasion using various means. The failed efforts to halt the invasion spread have forced South African scientists to start considering social controlling mechanisms, including utilization of these species without propagation as one of the alternatives. It is within this context that this review was aimed at making an inventory of invasive grass species that provide ecosystem services in South Africa. The required data were gathered through rigorous literature surveys and analysis. A total of 19 invasive alien grass and rush species, from 15 genera and two families that are associated with provision of ecosystems services, were documented. The reported species are associated with the provision of nine ecosystem services. The current study argued that although these species are associated with some ecosystem services, they can also threaten the ecological integrity of the ecosystems if not properly managed. Insights about ecosystem services associated with invasive alien grass and rush species are significant in balancing the complex environmental issues and livelihood requirements in rural South Africa.