2019
DOI: 10.1101/640441
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National Wetland Map 5 – An improved spatial extent and representation of inland aquatic and estuarine ecosystems in South Africa

Abstract: The improved representation of inland aquatic (freshwater) and estuarine ecosystems and associated data was a key component of the 2018 National Biodiversity Assessment, and is an essential step in enhancing defensible land use planning and decision making. This paper reports on this enhancement of the National Wetland Map version 5 (NWM5) for South Africa and other data layers associated with the South African Inventory of Inland Aquatic Ecosystems. Detail is provided on (i) the extent of wetlands mapped in N… Show more

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Cited by 5 publications
(8 citation statements)
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“…The presence of azonal vegetation types and soil types conducive to the formation of deep root systems with access to aquifers were mapped by Le Maitre et al (2016) and used to this end, based on data from Mucina and Rutherford (2006) and LTSS (2002). We used this same map, and added data from the recently compiled National Wetlands Map of South Africa version 5 (van Deventer et al, 2020). In mountainous regions of the CFR, groundwater interacts with vegetation and can produce surface flow.…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…The presence of azonal vegetation types and soil types conducive to the formation of deep root systems with access to aquifers were mapped by Le Maitre et al (2016) and used to this end, based on data from Mucina and Rutherford (2006) and LTSS (2002). We used this same map, and added data from the recently compiled National Wetlands Map of South Africa version 5 (van Deventer et al, 2020). In mountainous regions of the CFR, groundwater interacts with vegetation and can produce surface flow.…”
Section: Methodsmentioning
confidence: 99%
“…Many of these groundwater seeps were not mapped in previous versions of the National Wetland Map as they can be very localized or only seasonally apparent. van Deventer et al (2020) significantly improves the representation of these seeps, covering 453 748 ha nationally. We add these to the extent mapped by Le Maitre et al (2016) as having access to groundwater.…”
Section: Methodsmentioning
confidence: 99%
“…Despite efforts to conserve wetlands through targeted management practices, the precise extent of wetlands in Africa is unknown due to the absence of comprehensive national wetland inventories which characterise and classify wetlands in a systematic manner (Junk et al, 2013; Hess et al, 2015; Hu et al, 2017; Grenfell et al, 2019; Van Deventer et al, 2020). This includes both Ramsar wetland types (Ramsar Convention, 2010b) and other, smaller wetlands such as dambos.…”
Section: Wetland Transformation In Africa and Implications For Ecosys...mentioning
confidence: 99%
“…Although many countries are encouraged by the Ramsar Convention to develop wetland inventories as a step towards conservation and management (Davidson et al, 2018), many African wetlands have not been mapped effectively (Junk et al, 2013; Dixon et al, 2016; Davidson and Finlayson, 2018; Davidson et al, 2018). Wetland inventories may also be outdated or incomplete and this makes it difficult to determine their general status and properties (Dugan, 1990; Finlayson and Van der Valk, 1995; Van der Valk, 2012; Van Deventer et al, 2020). Many studies have examined how wetland users interact with ecosystems in African wetlands with broad reference to sustainable management practices (e.g.…”
Section: Wetland Transformation In Africa and Implications For Ecosys...mentioning
confidence: 99%
“…South Africa, where much of the mapping effort and field verification has focused on the relatively 60 high precipitation areas near the coast, with the result that the extensive arid to semi-arid interior 61 of the province, especially to the east, has the lowest level of confidence in wetland spatial extent and hydrogeomorphic (HGM) type (Van Deventer et al 2020). However, wetlands in drylands 63 tend to be hydro-geomorphologically distinct from wetlands in humid areas (Tooth and McCarthy 64 2007) and have an especially important role to play within the landscape in terms of the supply of 65 provisioning services for cultivators, pastoralists and other natural resource users (Scoones 1991).…”
Section: Introductionmentioning
confidence: 99%