An analysis of the vegetation and soil relations in a mixed Tree Bush Savannah (TBS) of Mushandike Wildlife Sanctuary within Tokwe Mukorsi dam basin of Zimbabwe is presented. The objective of this study was to ascertain some perceptible Colophospermun mopane species found in low lying arid or semi arid areas on granite to confirm its indicator value for sodic soils in Zimbabwe. Enumeration and measurements of species along a catena were carried out in representative vegetation quadrants or plots together with soil sampling for laboratory analyses. Species data sets were prepared for multivariate analysis using Detrended Correspondence Analysis (DCA) with the aid of computer software called Canonical Correspondence Analysis (CANOCO). The purpose of this was to determine probable ecological communities, investigate environmental gradients responsible for the vegetation patterns and inspect the indicator significance of mopane for sodic soils. The results showed three ecological units namely dry lowlands, wet lowlands and uplands with associated species which were then classified and described. It is concluded that mopane is not a good indicator of sodic soils but like other companion vegetation species of dry lowlands, it could be used as a land quality indicator in soil survey and land use planning in semi arid areas on granitic soils.
Keywords: Ordination analysis, Indicator value, Mopane, Sodicity.