Peatlands mapped as having turned desiccated or have burnt

NBA2018_Terrestrial Ecosystem Threat Status and Protection level remaining extent layer is associated with the NBA2018_Terrestrial Ecosystem Threat Status and Protection level. While the a NBA2018_Terrestrial Ecosystem Threat Status and Protection level remaining extent provides the data for Protection level and threat status for the historical (pre 1750AD) extent of the terrestrial ecosystems, this layer shows the protection level and threat status of the current remaining extent of terrestrial ecosystems. More detail can be found in NBA 2018 Technical Report Volume 1: Terrestrial Realm, http://hdl.handle.net/20.500.12143/6370

Latest update of the Sub-Antarctic Marine Ecosystem Map

NBA2018_Terrestrial Ecosystem Threat Status and Protection Level forms a key part of the National Biodiversity Assessment. More details can be found in NBA 2018 Technical Report Volume 1: Terrestrial Realm, http://hdl.handle.net/20.500.12143/6370

The SANBI-INR IAPs layer was developed through a collaboration between SANBI and the Institute of Natural Resources as part of the Ecological Infrastructure for Water Security (EI4WS) project. The data was derived from expert workshops conducted with individuals who had knowledge about invasive alien plant species in the catchment. Through virtual workshops the “experts” identified areas they were familiar with to provide information about invasive infestation therein. Areas that experts could not provide information for or had low confidence about were assessed through field visits to verify and fill data gaps. In the context of the project, the experts referred to are local stakeholders that have been involved in IAPs clearing projects and are familiar with the types of IAP species present in the Berg-Breede catchment. The SANBI-INR IAPs layer was developed through various stages as indicated below: Segment and data preparation – which involved developing the segments layer using Segment Mean Shift tool in ArcMap. Thereafter, a structured attribute table and domains were created. Engagement with experts/specialists to capture data on IAPs types and distribution patterns within the segments. In-field mapping and verification to verify the data captured on desktop and to fill in gaps for where there was no data. Incorporation of existing IAPs data from various sources. The project only focused on the following IAP woody species through consultation with various stakeholders: Port Jackson Long-leafed wattle Stinkbean Australian myrtle Blackwood Willows Poplar Rooikrans Hakea Black wattle Eucalyptus sp. Pine sp.

This dataset represents the SANBI-INR Invasive Alien Plants (IAPs) layer integrated with other IAPs data from various sources i.e., the Socio-Economic Benefits of Ecological Infrastructure (SEBEI), Cape Nature, Water Information Management System (WIMS), Aurecon and the National Invasive Plants Survey (NIAPS). The Berg-Breede IAPs density layer was developed using a conditional classification approach. This layer is one of the outputs from the “Development of a semi-quantitative protocol for mapping woody invasive alien plant species” study and was developed as part of SANBI’s Ecological Infrastructure for Water Security (EI4WS) Project. The dataset represents the percentage of IAPs density in the Berg-Breede demonstration catchment at a 10m spatial resolution. For further details on the technical approach followed in developing the layer refer to the following technical report for the project. Quayle, L., Ndlovu, K., Daniels, F., Evans, W., Malebu, T., Malatji, M., Simka, B., Bredin, I., Manuel, J., Maka, S. 2021. Development of a Semi-Quantitative Protocol for Mapping Woody Invasive Alien Plants Species: Piloted in the Breede River Catchment, South Africa. Project Technical Report developed for the South African National Biodiversity Institute., an entity of the Department of Forestry, Fisheries and the Environments, Pretoria.

Springs (DRDLR:NGI, 2006 and 2016). The springs data was extracted from the hydrological point shapefile data issued by the DRDLR-NGI in September 2015. Springs can indicate potential origins of seep wetlands or rivers, and were used by the data capturers to assess sources of wetlands. It also provides the location of inland aquatic features that were not assessed in the NBA 2018. Please see Van Deventer et al. (2018) for more information.

Wastewater Treatment Works (WWTW) (CSIR, 2015).

Oxbow lakes from the DRDLR:NGI data issued in May 2016 for the purpose of indicating floodplain wetlands. These oxbow lakes are in some instances indicative of the floodplain depressions, however some artificial systems were also mapped as Lakes by DRDLR:NGI. The polygon features called 'Lakes' were extracted and converted to points. The data was used by data capturers to guide them in the typing of hydrogeomorphic units, and can also be used when modelling HGM units. Please see Van Deventer et al. (2018) for more information.

Waterfalls Waterfalls were extracted from the DRDLR:NGI point data and supplemented by Heidi van Deventer from known waterfalls and those indicated by experts across the country.