Impact of Seriphium plumosum densification on Mesic Highveld Grassland biodiversity in South Africa

Mesic Highveld Grassland is important for biodiversity conservation, but is threatened by bush densification from Seriphium plumosum. This indigenous encroacher spreads rapidly and outcompetes other herbaceous species, changing the species composition and structure of grasslands. This study looks at three different densities of S. plumosum and how these affect grassland biodiversity within Telperion, Mpumalanga, South Africa. An intermediate density of S. plumosum resulted in the highest species diversity (H = 2,26), a low density was moderately diverse (H = 1,96), and a high density was least diverse (H = 1,78). There were differences between the three densities in terms of plant species diversity, with the intermediate density being significantly more diverse (P < 0.01) than both the low and high densities. Findings indicate that there was a significant difference between the sites in terms of ecological successional status (P < 0,01). The presence of S. plumosum at low d...