To delineate the physical and biological processes and habitats necessary for estuarine function and health based on their historical extent and Estuarine Ecosystem Types at the landscape scale.

Van Niekerk, L., Adams, J.B., Fernandes, M., Harris, L., Lamberth, S.J., MacKay, CF., Petersen, C., Ramjukhad, C.-L., Riddin, T., Van Deventer, H. & Weerts, S.P., 2019, ‘ Chapter 4: Extending the Estuary Functional Zone to include key habitats and processes’, South African National Biodiversity Assessment 2018: Technical Report. Volume 3: Estuarine Realm. South African National Biodiversity Institute, Pretoria. Report Number: SANBI/NAT/NBA2018/2019/Vol3/A

This layer was developed as part of the 2018 National Biodiversity Assessment.

This data may not be reproduced by any means, nor redistributed via web site or ftp site, without prior permission. Whilst every effort has been made to ensure the accuracy of data, users are advised to use the data and conclusions drawn from its use with caution. Users noting errors and omissions are requested to notify Lara van Niekerk to improve data accuracy. These data are not for resale or replicating. This digital version is in the public domain requiring only the conventional acknowledgement of source in publications and reports.

APPROPRIATE USE OF THIS DATASET: The Threat status and Ecosystem Protection level statistics must be interpreted with an understanding of the approach and rationale described in the National Biodiversity Assessment 2018 Estuarinel technical documents and Synthesis report.

PROJCS["AEA_RSA_WGS84",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Albers"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",25.0],PARAMETER["Standard_Parallel_1",-24.0],PARAMETER["Standard_Parallel_2",-33.0],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]

This version of the estuarine ecosystem map is an improvement on previous versions that were based on the 1:10 000 scale topographical maps 5m contour. The Estuary Classification is an update of the Whitfield (1992) classification scheme. This version incorporates biogeographical zonation and introduces new types.

SANS 1878

FGDC-STD-001-1998