Tsitsikamma Marine Protected Area

The Tstsikamma Marine Protected Area is a marine protected area on the south coast of South Africa, in both the Western Cape and Eastern Cape. It is on the coast of the Tsitsikamma National Park, and is one of the oldest MPAs in the country. The MPA provides protection for marine habitat and wildlife, including birds and threatened and endangered fish species. [1]

Tsitsikamma Marine Protected Area
Storms River mouth in the Tsitsikamma Marine Protected Area
Tsitsikamma MPA location
LocationWestern Cape and Eastern Cape, South Africa
Nearest cityKnysna
Coordinates34°01′S 23°53′E
Area186 km2 (72 sq mi)
Governing bodySANParks
{{ }}

The MPA is in near pristine condition, and is a suitable area for research on endangered fish species. It was designated as a Marine Protected Area in 1964.[1] The length of the protected shoreline is 60 km, and the area of protected ocean is 186 km2.[1]

The MPA is managed by SANParks.[1]

History

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 Natural Resources Act, 18 of 1998.[2]

Purpose
See also: Marine protected area

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".[3]

Extent

The length of the protected shoreline is 60 km, and the area of protected ocean is 186 km2.[1]

Zonation

The entire MPA is zoned as a restricted (no-take) area.[1]

Boundaries
  • Northern boundary is the high-water mark between Die Punt, Nature's Valley, at S33°59.0' E023°34.561' (west), and the right bank of the Grootrivier at S34°03.6', E024°11.665, (east)
  • Eastern boundary is a line from the right bank of the Grootrivier at S34°03.6', E024°11.665, running due south to a point three nautical miles offshore at S34°06.6', E024°11.665
  • Southern boundary is a straight line from S34°06.6', E024°11.665, approximately parallel to the shore, to a point three nautical miles from the high-water mark at S34°01.817', E023°38.857E measured along a line running due south from the right bank of the mouth of the Bloukrans River, and then due north to a point 0.5 nautical miles from the high-water mark at S33°59.317', E023°38.857', and then along a straight line roughly parallel to the shoreline to a point at S33°59.5', E023°34.561' due south of Die Punt, Nature's Valley.
  • The western boundary is a line from the high-water mark at Die Punt, Natures Valley, at S33°59.0' E023°34.561' due south to a point about 0.5 nautical miles offshore at S33°59.5', E023°34.561' The northern boundary of the MPA is the southern boundary of the Tsitsikamma National Park[2]

Restricted areas

The whole MPA is a restricted zone.[3]

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, South African National Parks (SANParks), which manages the MPA with funding from the SA Government through the Department of Environmental Affairs (DEA).[3][4]

The Department of Agriculture, Forestry and Fisheries is responsible for issuing permits, quotas and law enforcement.[5]

Use

Scuba diving

Scuba diving requires a permit. There is an office at the Storms River mouth slipway where dives can be organised.

Geography

General topography

The coastline is fairly straight, and is generally very steep from a relatively flat coastal region between the inland mountains and the sea. Much of the shoreline can best be described as cliffs. The Storms River gorge is roughly perpendicular to the coastline, and very narrow — the sides are approximately vertical. A boat trip or hike up the gorge will show a section through the coastal formations.

Geology

The rock formations are heavily folded sandstones and shales of the Table Mountain series. The coastline formation to the west of the river mouth is the Silurian Tchando formation, which is typically fine to coarse grained brown sandstone and shale, and inland and across the river to the east, mostly Ordovician Peninsula sandstone. Offshore formations may include Devonian Gydo shales and siltstones. Folding is roughly parallel to the coastline, and dip is frequently near vertical, even overfolded in places. Resistance to weathering is also very variable, with some extremely resistant quartzitic sandstone, and some very friable shales. As a result, there are areas with distinct ridges, often roughly parallel to the shoreline.

Climate of the southern Cape
See also: Climate of South Africa

Ecology
Marine bioregions of the South African Exclusive Economic Zone: The Tsitsikamma Marine Protected Area is in the Agulhas bioregion.

The MPA is in the warm temperate Agulhas inshore marine bioregion to the east of Cape Point which extends eastwards to the Mbashe River. The Mbashe River was chosen as the most appropriate boundary between the subtropical Natal province to the north, and the warm temperate Agulhas region to the south, but change is gradual between these regions. Upwelling on the south coast of South Africa is largely driven by the Agulhas current and the continental shelf. This form of upwelling forces cold deep water up onto the continental shelf, but not necessarily above the thermocline. In the region east of the Agulhas bank, wind enhanced upwelling, occurring mainly in summer, augments the current driven upwelling bringing the colder deeper waters to the surface. This enhances biological productivity by supply of nutrients to the euphotic zone (where plants have sufficient light to flourish) which fuels phytoplankton production, and rocky shores that are supplied with the nutrient rich water support rich algal biomass. There are a large proportion of species endemic to South Africa along this coastline.[6][7]

Three 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. 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.[8] 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.[8]:Ch.2

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.

Sandy beaches and bottoms (including shelly, pebble and gravel bottoms) Sandy bottoms at first glance appear to be fairly barren areas, as they lack the stability to support many of the spectacular reef based species, and the variety of large organisms is relatively low. The sand is continually being moved around by wave action, to a greater or lesser degree depending on weather conditions and exposure of the area. This means that sessile organisms must be specifically adapted to areas of relatively loose substrate to thrive in them, and the variety of species found on a sandy or gravel bottom will depend on all these factors. Sandy bottoms have one important compensation for their instability, animals can burrow into the sand and move up and down within its layers, which can provide feeding opportunities and protection from predation. Other species can dig themselves holes in which to shelter, or may feed by filtering water drawn through the tunnel, or by extending body parts adapted to this function into the water above the sand.[8]:Ch.3

The open sea


Endemism

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.[6][7]

Named dive sites
View of the dive site at Storms River Mouth from across the river. The slipway and restaurant are visible slightly left of centre, where the road ends.
  • Storm's River Mouth, S34°01.355 E023°53.928'
  • The Knoll, just off the cliffs east of the Storms River mouth
  • Rheeders' Reef, S34.02901° E23.92825°
  • Middle Bank, offshore from Storms River mouth

Slipways and harbours in the MPA

There is a small concrete slipway at the Storm's River Mouth, which is moderately protected from swell. The Storms River mouth is navigable for small craft for some distance, and there are places where a boat can moor in the gorge that are accessible by footpath from the mouth.

See also

References
  1. "Tsitsikama". World Wildlife Fund. Retrieved 21 January 2019.
  2. Declaration of areas as Marine Protected Areas: Government Notice R1429 in Government Gazette 21948 (PDF). 29 December 2000. Retrieved 19 January 2019 – via Centre for Environmental Rights.
  3. "Marine Protected Areas". World Wildlife Fund. Retrieved 24 May 2018.
  4. "Tsitsikama". World Wildlife Fund. Retrieved 24 January 2019.
  5. "Marine Protected Area". Retrieved 26 May 2018.
  6. Jones, Georgina (2008). A field guide to the marine animals of the Cape Peninsula. Cape Town: SURG. ISBN 978-0-620-41639-9.
  7. Sink, K.; Harris, J.; Lombard, A. (October 2004). Appendix 1. South African marine bioregions (PDF). South African National Spatial Biodiversity Assessment 2004: Technical Report Vol. 4 Marine Component DRAFT (Report). pp. 97–109.
  8. Branch, G.M.; Branch, M.L. (1985). The Living Shores of Southern Africa (3rd impression ed.). Cape Town: C. Struik. ISBN 0 86977 115 9.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.