Improving the National wetland inventory

Uncertainties in the distinct differences between wetland ecosystem types across wetland vegetation groups, as used in the NBA 2011, resulted in the consideration of the bioregions from the National Vegetation Map (NVM) of 2018 (Dayaram et al. in review) for the spatial representation of the regional setting at Level 2 of the Classification System for Wetlands and other Aquatic Ecosystems in South Africa.

Van Deventer, H., Smith-Adao, L., Collins, N.B., Grenfell, M., Grundling, A., Grundling, P-L., Impson, D., Job, N., Lötter, M., Ollis, D., Petersen, C., Scherman, P., Sieben, E., Snaddon, K., Tererai, F. & Van der Colff, D. 2019. South African National Biodiversity Assessment 2018: Technical Report. Volume 2b: Inland Aquatic (Freshwater) Realm. CSIR report number CSIR/NRE/ECOS/IR/2019/0004/A. South African National Biodiversity Institute, Pretoria. http://hdl.handle.net/20.500.12143/6230.

None. Latest versions of the SAIIAE will be made available on the SAIIAE BGIS webpage

There are no use limitations for this item. The confidence rating map and artificial wetland map should always be consulted to assess whether the NWM5 is fit for purpose. Please see Van Deventer et al., 2018 for more information.

There are no access limitations for this item.

None

WGS 1984

Projection: Albers

False_Easting: 0.0

False_Northing: 0.0

Central_Meridian: 25.0

Standard_Parallel_1: -24.0

Standard_Parallel_2: -33.0

Latitude_Of_Origin: 0.0

Linear Unit: Meter (1.0)

Uncertainties in the distinct differences between wetland ecosystem types across wetland vegetation groups, as used in the NBA 2011, resulted in the consideration of the bioregions from the National Vegetation Map (NVM) of 2018 (Dayaram et al. in review) for the spatial representation of the regional setting at Level 2 of the Classification System for Wetlands and other Aquatic Ecosystems in South Africa. The NVM 2018 included updates to vegetation types in the Fynbos and Albany Thicker Biomes (Dayaram et al. in review). Aquatic categories in the NVM 2018 were subsumed into adjacent vegetation types and the updated estuaries functional zones were excluded. Several other bioregions were also subsumed into adjacent bioregions, similar to the wetland vegetation types (Nel et al. 2011a; 2011b). These included the 'Alluvial Vegetation', 'Azonal Forests', 'Inland Saline Vegetation' and 'Zonal & Intrazonal Forests'. The outcome resulted in 37 vegetation bioregions for the regional setting at Level 2. The majority of these bioregions match those published in Mucina & Rutherford (2006), except for the Eastern Strandveld (23 polygons extending over 1 375 ha where no wetland polygones have been mapped) and Seashore Vegetation (877 polygons extending over 42 067 ha containing 37 wetland polygons of 787 ha) which are both thinly distributed on the coast.

SANS 1878

FGDC-STD-001-1998