The interaction between multi-species bushclumps and the herbaceous layer was investigated in a mesic Eastern Cape bushclump savanna. Bushclumps had a moderating effect on their microclimate when compared with the open grassland: lower maximum and higher minimum temperatures. higher humidity and 80-90% reduction in irradiance. Soils beneath bushclumps were more fertile than grassland soils with greater organic carbon. P, K and CEC. The importance of bushclumps in maintaining and recycling nutrients, especially on sandier soils, was highlighted as mesic savannas are threatened by complete bush clearing. Bushclumps were characterized by a sparse shade-tolerant herbaceous layer dominated by Panicum maximum and Helictotrichon capense which contributed little to grazing capacity. Grass production was greater in the grassland on the south-facing side of bushclumps than on other aspects. The size of the bank of woody seeds and seedlings beneath bushclumps, but not beneath grasslands, indicate a likely rapid re-establishment of woody individuals following bush clearing.
Journal articles from the Grassland Society of Southern Africa (GSSA) African Journal of Range and Forage Science as well as related articles and reports from throughout the southern African region.