Utilization of Vegetation and Avian Indicators for Wetland Health Assessment at the Driefontein Ramsar Site, Zimbabwe

The high rate of wetland degradation, which has reached over 40 percent in the past 30 years, has raised conservation concerns worldwide. The role of local communities in assessing wetland health has not been integrated with scientific approaches, and efforts are needed to harmonise these perspectives. This study examines the health of the Driefontein wetlands, a Ramsar site, by evaluating the distribution and composition of vegetation and bird species as indicators of wetland health during the dry season. Five 10 m x 50 m zones were established around each of five selected pools and subdivided into quadrants for sampling wetland indicator vegetation, in accordance with the Environmental Management Agency's Wetland Species Indicator Guide. Bird counts were conducted twice a day, once a week, over four months during the dry season. Findings revealed variations in vegetation richness and diversity across various zones, with species richness and diversity decreasing as distance from the water source increased. The 10-20 m and 20.1-30 m zones exhibited the highest species richness (R=14) and diversity (Shannon indices of 2.216 and 2.188, respectively), while the 40.1-50 m zone had the lowest (R=10, Shannon = 1.2). Dominant species in the 10-20 m zone included Typha latifolia subsp. capensis (31.5%) and Phragmites australis (17%). Species richness declined with distance, with some species failing to thrive beyond 30 m. Bird counts indicated dominance by egrets (66.9%) and cranes (15.3%), with Bubulcus ibis (49.2%) being the most prevalent indicator of wetland birds. The combined use of vegetation and avian indicators for wetland health assessment offers greater opportunities to inform development and conservation efforts.