Namibia’s coast is entirely embedded in the Namib Desert, extending around some 1570 km from South Africa to Angola. The hyper-arid Namibian coastal ecosystem is home to a significant and unique array of biological and ecological diversity, including uniquely adapted plants and animals, rich estuarine fauna and a high diversity of migratory shore and seabirds. In particular, Namibia’s coastal zones are considered as refuge for a number of endangered species.
There are few sheltered bays on the coast. Most of Namibia’s shore is sandy beach (54%) or mixed sand and rock (28%). Rocky shores constitute only 16% of the total length. Coastal plains comprise dune fields, lichen encrusted gravel plains and scattered salt pans. Vegetated dune-hummock areas are common near the coast.
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Several ephemeral westward flowing rivers drain the hinterland and dissect the coastal landscape. Perennial wetlands, some of them supporting significant waterfowl populations, are supported within the lower reaches of these rivers in an otherwise barren desert landscape. Along the Skeleton Coast, extensive dune fields may block the flow of some rivers for several years, resulting in the formation of spectacular ephemeral ponds.
Several wetlands provide important feeding grounds to a large number of migratory shore and seabirds, such as the Kunene River Mouth, Cape Cross Lagoons, Mile 4 Saltworks, Walvis Bay Wetlands, Sandwich Harbour, Lüderitz Lagoon, coastal municipal sewerage works, the Orange River Mouth, and important coastal seabird breeding islands including Mercury, Ichaboe and Possession Island.
The coastal areas fall within a series of contiguous protected and recreational areas, namely the Skeleton Coast National Park, the National West Coast Tourist Recreation Area, the Namib-Naukluft National Park and the recently proposed Sperrgebiet National Park, formerly a mining concession completely off-limits to the public and accessible to only a few scientists. The only portion of the coast with no protection status are the municipal areas of Walvis Bay and Swakopmund in the Erongo Region, between Mile 14 north of Swakopmund and the Kuiseb River south of Walvis Bay. The coastline of Namibia is, in fact, part of a continuum of protected areas that stretches from Southern Angola into Namaqualand in South Africa.
The coastline boasts:
A total of 205 seaweed species has been collected in Namibian waters.
Just over 400 plant species occur in the Central Namib - making up to 10% of the flora of the country, the Northern Namib supports approximately 100 to 200 plant species and the Southern Namib is home to well over 600 species of plants (a global biodiversity hotspot)..
About 410 species of bony fish and 83 species of cartilaginous fish are thought to occur in Namibian waters. Of these, 91 species and 30 species respectively have been recorded in depths of less than 30m.
Of the 8 species of sea turtles worldwide, 5 occur in Namibia. Most are considered endangered and are protected under the Sea Fisheries Act and international agreement.
Of the 62 species of seabirds recorded in Namibian waters, 20 are only rare vagrants. Twelve species breed along the Namibian coast in particular on offshore islands and man-made platforms. These include the endangered African Penguin, African Black Oystercatcher and the rare breeding endemic Damara Tern.
Marine Mammals represented in Namibian waters include cetaceans and seals. Of the 11 species of baleen whales worldwide, 8 occur off Namibia, while 23 species of dolphins and toothed whales can be found.
Source: NACOMA - http://www.nacoma.org.na/Our_Coast/FaunaFlora.htm

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