Taxonomic diversity and structure of benthic macroinvertebrates in Aby Lagoon (Ivory Coast, West Africa)

The benthic macroinvertebrates of Aby lagoon (West Africa: Ivory coast) was studied during four seasons (high dry season, high rainy season, low dry season and low rainy season, respectively) from June 2006 to March 2007. The distribution of the benthic macroinvertebrates species was recorded at 13...

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Bibliographic Details
Published in:Pakistan journal of biological sciences 2008-09, Vol.11 (18), p.2224-2230
Main Authors: Kouadio, K N, Diomandé, D, Ouattara, A, Koné, Y J M, Gourène, G
Format: Article
Language:English
Subjects:
Animals
Corbula trigona
Cote d'Ivoire
Crassostrea gasar
Ecosystem
Fresh Water
Invertebrates - classification
Marine
Marine Biology
Mollusca
Oligochaeta
Population Dynamics
Seasons
Seawater
Species Specificity
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Summary:The benthic macroinvertebrates of Aby lagoon (West Africa: Ivory coast) was studied during four seasons (high dry season, high rainy season, low dry season and low rainy season, respectively) from June 2006 to March 2007. The distribution of the benthic macroinvertebrates species was recorded at 13 stations on the whole of the lagoon. A total of 62 taxa of benthic macroinvertebrates belonging to 28 families and 10 orders were listed. The molluscs and crustaceans dominate qualitatively by adding up 51 and 24%, respectively of the total number of organisms. Five taxa (Corbula trigona (20%), Pachymelania aurita (12%), Clibernhardius cooki (7%), Oligochaeta (7%) and Crassostrea gasar (6%) accounted for 52% of total abundance. Classification analysis used to perform the characterisation of the lagoon on the basis of benthic macroinvertebrates showed the existence of four main clusters in which the seasonal pattern in benthic macroinvertebrates were very similar in the four seasons. In contrast the species richness and diversity indices were significantly different. Furthermore these indices where higher in the stations closer to the sea and surrounded by mangrove trees (southern area) compared to the inland ones.
ISSN:1028-8880
DOI:10.3923/pjbs.2008.2224.2230