Article

Biodiversity and ecology of epilithic diatoms in the Agnéby River, Ivory Coast

Published in: African Journal of Aquatic Science
Volume 43 , issue 2 , 2018 , pages: 131–140

DOI: 10.2989/16085914.2018.1470083

Author(s): KR N’Guessan Laboratoire d’Hydrobiologie et d’Éco-technologie des Eaux-U.F.R, Côte d’Ivoire , BRD Aboua Laboratoire d’Hydrobiologie et d’Éco-technologie des Eaux-U.F.R, Côte d’Ivoire , J Tison-Rosebery Irstea-ur eabx, France , A Ouattara Laboratoire d’Environnement et de Biologie Aquatique, UFR-Sciences et Gestion de l’Environnement, Côte d’Ivoire , EP Kouamelan Laboratoire d’Hydrobiologie et d’Éco-technologie des Eaux-U.F.R, Côte d’Ivoire

Keywords: diversity , environmental parameters , seasonal variability , tropical rivers , West Africa

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Abstract

The ecology and taxonomy of the epilithic diatom flora of the Agnéby River, Ivory Coast were studied in 2012. Ten sites were investigated and diatoms were sampled on glass slides immersed for a period of 30 days during the wet and dry seasons. Physico-chemical parameters were measured at each site while sampling diatoms. Five taxa were largely dominant: Planothidium comperei CE Wetzel, N’Guessan and Tison-Rosebery, Eolimna minima (Grunow) Lange-Bertalot, Planothidium piaficum (JR Carter and Denny) CE Wetzel and Ector, Cocconeis schroederi Foged and Cocconeis scutellum var. parva (Grunow in Van Heurck) Cleve. Electrical conductivity, temperature, dissolved oxygen, nitrite and phosphorus were found to influence the distribution of taxa.

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