Aquatic Invertebrate Diversity in Calcareous and Sandstone Wetlands of the Cape Floristic Region, South Africa

The wetlands of the Cape Floristic Region, South Africa are a hotspot of
species diversity. The aquatic invertebrates of this region are so diverse mainly
because of the varying geomorphology and hydrology of the realm, which affect
water chemistry. We hypothesized that there would be a significant difference
between the suite of invertebrate species of a closed, permanent and sandstone-based
wetland (Potberg Vlei) and a relatively open, temporary, calcareous wetland (De
Hoop Vlei). The water chemistry of each area is vastly different, but there is no
significant difference in species richness of the wetlands, though there has been an
increase in species richness since the fall. However, there does seem to be a difference
in the species diversity of the two vleis. These differences could be quite important in
determining conservation areas.