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Posts tagged Banc d’Arguin National Park

Green Phytoplankton and Islands in the Banc d’Arguin, Mauritania

19.3N 16.2W

April 22nd, 2010 Category: Phytoplankton

Mauritania - March 5th, 2010

Mauritania - March 5th, 2010

The bright green waters of the Bay of Arguin, or Banc d’Arguin, Mauritania, are caused by the phytoplankton which thrive in its nutrient-rich offshore waters. The bay is mostly shallow and contains many tidal flats.

An island is visible in the lower sections of the bay. This is Tidra, the largest island in the Banc d’Arguin at 18 miles long and 5 miles wide. The island is part of the Banc d’Arguin National Park. Another smaller island, Kiji, can be seen just off Tidra’s western shores.

Phytoplankton in Nutrient-Rich Waters of the Bay of Arguin, Mauritania

19.7N 16.4W

December 31st, 2009 Category: Phytoplankton

Mauritania - December 16th, 2009

Mauritania - December 16th, 2009

The Bay of Arguin, or Banc d’Arguin, is a bay on the Atlantic shore of Mauritania. It is south of Cap Blanc, north of Cap Timiris, and contains the islands of Arguin (above center) and Tidra (below). The bay also contains the 12,000 km² Banc d’Arguin National Park. Here, its waters appear greenish due to nutrient-rich offshore waters teeming with phytoplankton.

The bay is an area of shallow water and tidal flats between the Sahara and the upwelling system off the Mauritanian coast. Hydrographically the Banc d’Arguin can be characterized as a large-scale negative estuary with higher salinities near the shore. It is concluded that ultimately the Banc d’Arguin ecosystem is fueled by nutrients and organic matter derived from the upwelling area.

The inner part of the Banc d’Arguin system is dominated by a detritus-based benthic foodweb in which seagrasses are the principal primary producers. Little of the seagrass production seems to be exported to other parts of the system or other areas. Zooplankton and zoobenthos biomasses are relatively low, but nevertheless support high densities of consumers. Aquatic birds are especially numerous.

Phytoplankton in Gulf of Arguin, Mauritania

January 25th, 2009 Category: Snapshots

Gulf of Arguin, Mauritania - November 29th, 2008

Gulf of Arguin, Mauritania - November 29th, 2008

The Banc d’Arguin National Park (French: Parc National du Banc d’Arguin) lies on the west coast of Mauritania between Nouakchott (South) and Nouadhibou (North, on the peninsula).

This World Heritage Site is a major breeding site for migratory birds. A wide range of species include flamingos, broad-billed sandpipers, pelicans and terns. Much of the breeding is on sand banks including the islands of Tidra, Niroumi, Nair, Kijji and Arguim.

The park lies on the boundary between the Afrotropical and Palaearctic biogeographic realms on a coast of nutrient-rich offshore waters teeming with phytoplankton, visible here as a bright green offshore bloom.

The surrounding waters are some of the richest fishing waters in western Africa and serve as nesting grounds for the entire western region.

The park’s vast expanses of mudflats provide a home for over two million migrant shorebirds from northern Europe, Siberia and Greenland.

The region’s mild climate and absence of human disturbance makes the park one of the most important sites in the world for these species.

source Wikipedia