Vegetation types include littoral, wetland and volcanic vegetation. Loss of wetland habitat threatens dragonfly populations around the world. There are five principal wetland vegetation types. The coastal area contains pockets of wetland and mangrove colonies. Some mangrove stands exist in the St Lucia estuary within iSimangaliso Wetland Park. The park protects of forested wetland. The bioswales were planted on graded slopes with wetland and upland plants. Loss of wetland floodplains results in more severe and damaging flooding. The ecological significance of an internationally important wetland was also ignored. It harbors over 250 species of wetland birds. Surface water is water in a river, lake or fresh water wetland. This creates a wetland or swamp environment. This is where rooted wetland plants occur. Restoration is needed after disturbance or perturbation of a wetland. Many of these wetland areas are separated by active glaciers.