Acacia mearnsii

\"Displacement of species-rich indigenous plant communities by single-species wattle stands, and disruption of important ecosystem processes\" (de Wit et al. 2001)

Germination of both Cabbage and Africa love-grass were significantly (P <0.05) affected by the different concentration of extracts from the various parts of A. mearnsii. Germination inhibition increased with the reduction in concentration of the aqueous extract on both cabbage and African love-grass seeds (Table 3)

\"Increases in the height and biomass of vegetation increase rainfall interception and transpiration, and decreases streamflow\" (de Wit et al. 2001) \"Increases in soil nitrogen levels in nutrient-poor environments can make habitats unsuitable for indigenous plants and more susceptible to invasion by other species, reducing biodiversity\" (de Wit et al. 2001) \"The impact of Acacia species on biodiversity and ecosystem properties has a strong effect on ecosystem service delivery, as demonstrated by Le Maitre et al. (2011). For example, Acacia can have a negative impact on water discharge, a critical impact in a dry country such as South Africa, due to higher transpiration than native vegetation.\" (Oelofse etal. 2015)

Acacia species have been reported to affect conditions that are essential for grazing provision, including loss of species diversity, herbaceous cover, altered soil conditions (Ndou and Ruwanza 2016). In this study the loss of grazing capacity in densely invaded sites is highly attributed to displacement of total basal cover. The impact on lightly invaded sites include loss of grass cover and that of high gazing value Decreaser species Themeda triandra and Sporobolus fimbriatus, which were more prominent in uninvaded sites. (Yapi et al. 2018)