Title Effectiveness of Table Mountain National Park Marine Protected Area project (2017-2021)
Authors

Ndiviwe Baliwe
Department of Forestry, Fisheries and the Environment; role: Scientist

Publisher Department of Forestry, Fisheries and the Environment (2023)
Contributors

Project Member: George Branch
University of Cape Town; role: Emeritus Professor;

Contact Person: Ndiviwe Baliwe
Department of Forestry, Fisheries and the Environment; role: Scientist; email: nbaliwe@dffe.gov.za

Abstract Intertidal rocky shores are the most accessible marine habitats and therefore heavily impacted by harvesting. In recent years, they have also been increasingly invaded by alien species, which compounds the effects of harvesting on rocky shore community composition and functioning. Recent survey data, combined with historical data from 1970, were used to assess temporal changes over the intervening period in rocky shore communities at two sites (Wireless Point and Wireless Island).
Methods Data were collected on sloping platforms, four or five transects parallel to the shore, each with five replicates, were sampled during spring tides, covering four or five shore heights and employing 50 × 50-cm quadrats that were spaced at equidistant intervals up the shore to span the range between the mean low and mean high water marks, in exactly the same locations and shore heights as those surveyed in 1970. The quadrats were divided into 25 grid cells, each representing 4% cover, to facilitate accurate estimation of percentage cover. In each quadrat, all species of macro-invertebrates and algae (functionally grouped into corticated algae, encrusting and ephemeral algae) were identified. The percentage covers of sessile organisms were estimated and the numbers of mobile fauna counted. Counts were later converted to percentage cover to standardise the data).
Data
Embargoed
Temporal extent 27 Feb 2017 – 25 Apr 2017
Geographic extent
20 km
Leaflet Tiles © Esri — Source: Esri, DeLorme, NAVTEQ, USGS, Intermap, iPC, NRCAN, Esri Japan, METI, Esri China (Hong Kong), Esri (Thailand), TomTom, 2012

SOUTH ATLANTIC OCEAN

North: -34.122
South: -34.204
West: 18.25
East: 18.372

Keywords density, EBV: Community Composition > Community abundance, EBV: Community Composition > Taxonomic/phylogenetic diversity, EBV: Community Composition > Trait diversity, EBV: Ecosystem Function > Ecosystem disturbances, EBV: Species Populations > Species abundances, EBV: Species Populations > Species distributions, EOV: Biochemistry > Oxygen, EOV: Biology and Ecosystems > Invertebrate abundance and distribution (emerging), EOV: Biology and Ecosystems > Phytoplankton biomass and diversity, EOV: Biology and Ecosystems > Zooplankton biomass and diversity, EOV: Ecosystem Function > Ecosystem disturbances, EOV: Ecosystem Function > Primary productivity, no-take areas, rocky shores, SDG 14.2.1 Number of countries using ecosystem-based approaches to managing marine areas, shell length, SOUTH ATLANTIC OCEAN, Table Mountain National Park MPA