The Sardinia Bay Marine Protected Area is an inshore conservation region in the territorial waters of the Eastern Cape province, South Africa
History
Established in 1990, the MPA was proclaimed by the Minister of Environmental Affairs and Tourism, (Mohammed Valli Moosa, in Government Gazette No. 21948 of 29 December 2000 in terms section 43 of the Marine Living Resources Act, 18 of 1998.
Purpose
A marine protected area is defined by the IUCN as "A clearly defined geographical space, recognised, dedicated and managed, through legal or other effective means, to achieve the long-term conservation of nature with associated ecosystem services and cultural values".
Extent
The MPA is between Schoenmakerskop and SeaView along the coast to the west of Port Elizabeth, adjacent to the Sardinia Bay Nature Reserve. It is 7 km long and extends one nautical mile out to sea. The tidal and subtidal shoreline has both rocky and sandy areas. 12,91 km2 of ocean is protected. The MPA is a restricted area - no fishing or collection of marine life is allowed.
Management
The marine protected areas of South Africa are the responsibility of the national government, which has management agreements with a variety of MPA management authorities, in this case, Nelson Mandela Bay Metropolitan Municipality, which manages the MPA with funding from the SA Government through the Department of Environmental Affairs (DEA).
The Department of Agriculture, Forestry and Fisheries is responsible for issuing permits, quotas and law enforcement.
Use
Geography
Climate
Seasonal variations in sea conditions
Ecology
The MPA is in the warm temperate Agulhas inshore marine bioregion to the east of Cape Point which extends eastwards to the Mbashe River. There are a large proportion of species endemic to South Africa along this coastline.
Four major habitats exist in the sea in this region, distinguished by the nature of the substrate. The substrate, or base material, is important in that it provides a base to which an organism can anchor itself, which is vitally important for those organisms which need to stay in one particular kind of place. Rocky shores and reefs provide a firm fixed substrate for the attachment of plants and animals. Some of these may have kelp forests, which reduce the effect of waves and provide food and shelter for an extended range of organisms. Sandy beaches and bottoms are a relatively unstable substrate and cannot anchor kelp or many of the other benthic organisms. Finally there is open water, above the substrate and clear of the kelp forest, where the organisms must drift or swim. Mixed habitats are also frequently found, which are a combination of those mentioned above. There are no significant estuarine habitats in the MPA.
Rocky shores and reefs
There are rocky reefs and mixed rocky and sandy bottoms. For many marine organisms the substrate is another type of marine organism, and it is common for several layers to co-exist. Examples of this are red bait pods, which are usually encrusted with sponges, ascidians, bryozoans, anemones, and gastropods, and abalone, which are usually covered by similar seaweeds to those found on the surrounding rocks, usually with a variety of other organisms living on the seaweeds.
The type of rock of the reef is of some importance, as it influences the range of possibilities for the local topography, which in turn influences the range of habitats provided, and therefore the diversity of inhabitants. Sandstone and other sedimentary rocks erode and weather very differently, and depending on the direction of dip and strike, and steepness of the dip, may produce reefs which are relatively flat to very high profile and full of small crevices. These features may be at varying angles to the shoreline and wave fronts. There are fewer large holes, tunnels and crevices in sandstone reefs, but often many deep but low near-horizontal crevices.