West African Region

West African Region


(also, the Guinean Region), a tropical zoogeographical region of the ocean.

As a result of the several ice sheets that covered Europe and North America during the Pleistocene epoch, the West African Region experienced an extreme cooling (the temperature of the surface water in the tropical zone of the Atlantic Ocean was 7° lower than it is at present). This cooling caused the region’s flourishing ancient fauna to die out. Northern forms migrated southward through the tropics to the southern hemisphere. The Mediterranean Sea and the western shelf of Africa became populated with boreal and subarctic species. During the postglacial period, the northern forms died out.

The greatly depleted tropical fauna of the West African Region comprises a small number of endemic families and genera. There is only one species of sea cucumbers of the family Rhopalodinidae. There are gastropods of the genus Pusionella, sea urchins of the genus Rotula, and two genera of crabs (Atlantotlos and Ilia). Forty percent of the decapod crayfish and approximately 60 percent of the echinoderms, ascidians, and mollusks are endemic species. Abundant river discharge flow and lengthy rainfall greatly dilute the salt content of the surface water and introduce suspended particles into the water. Therefore, madrepore corals, which flourish in pure seawater, are few in number in the West African Region and do not form reefs. In contrast, the mangrove vegetation forms heavy growths, which are inhabited by unique fauna.


References in periodicals archive ?
Intelsat's broadband service platform makes high-quality, two-way broadband Internet access and IP networking directly available to ISPs, diversified carriers and other entities serving small- and medium-sized businesses, home offices, governments, corporations and other users in the West African region.
Just the same way that the West African region supported the elections in Guinea-Bissau, regional communities should support the RCA elections," he said.
We offered delegates and visitors an expert look at how the West African region is preparing its power industry for private sector participation.
Chambas: It is appropriate we pay tribute to the founding fathers for their foresight in recognising the importance of integration, which in essence, is the coming together of the economies and the people of the whole of the West African region.
emgs plans to mobilize the MV Geo Angler in the West African region for several months performing SBL surveys for various clients.
Chrome is also in a position to seek other growth options, including additional oil and gas interests within the JDZ and EEZ, elsewhere offshore the Gulf of Guinea, and in other parts of the West African region.
Kadre Desire Ouedraogo has expressed his gratitude to the African Union (AU) Commission for supporting ECOWAS mediation efforts in Burkina Faso, the effective management of the Ebola epidemic as well as in combating terrorism, particularly the Boko Haram insurgency in the West African region.
So we believe that our arrangements with SAA offer customers in South Africa and the West African region an important international service, one that we will be striving to broaden and improve in future years.
The Harris line of radio systems will enable the rapid deployment of voice, video, and data services in new areas across Nigeria and the West African region, further expanding Intercellular's customer base.
GTBank s contribution of N40 million to Swiss Red Cross and Doctors without Borders is also to support in the formation of regional network of field hospitals for treating medical personnel and to deal with the crumpling of state infrastructure, leading to zero access to basic healthcare facilities in numerous places of the West African region.
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