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Posts tagged Banc d’Arguin

Bright Green Phytoplankton in Bay of Arguin, Mauritania

20.2N 16.6W

November 21st, 2011 Category: Phytoplankton

Mauritania - November 20th, 2011

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 and Tidra. The bay contains the Banc d’Arguin National Park.

The Bay of Arguin is an area of over 10,000 km2 of shallow water and tidal flats between the Sahara and the upwelling system off the Mauritanian coast. Hydrographically, the bay can be characterized as a large-scale negative estuary with higher salinities near the shore, whose ecosystem is fueled by nutrients and organic matter derived from the upwelling area. Phytoplankton feeding on these nutrients and organic matter give the bay its bright green color.

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.