International Research Journal of Public and Environmental Health
Article ID JPEH/14/030/, 17 pages
Copyright © 2014 Author(s) retain the copyright of this article. Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 3.0 International License
Original Research Paper
Dynamic and structure of phytoplankton community and environment in the lake Taabo (Côte d’Ivoire)
Accepted 25 April, 2014
N. Groga1,2*, A. Ouattara1, A. Koulibaly3, A. Dauta4, C. Amblard5, P. Laffaille2, and G. Gourene1
1Laboratoire d’Ecologie et de Biologie Aquatique (LEBA), UFR des Sciences et de Gestion de l’Environnement, Université Nangui Abrogoua, 02 BP 801 Abidjan 02, Côte d’Ivoire.
2Université de Toulouse; INP, UPS; EcoLab (Laboratoire d’Ecologie Fonctionnelle et Environnement), 31062 TOULOUSE Cedex 9, France.
3Université Jean Lorougnon Guédé, Département de Botanique, BP 150 Daloa, Côte d’Ivoire.
4CNRS ; EcoLab (Laboratoire Ecologie Fonctionnelle et Environnement) , 31062 TOULOUSE Cedex 9, France.
5Université Blaise Pascal Clermont II Laboratoire de Biologie Comparée des Protistes (URA CNRS 138)- Les Cézeaux. 63177 AUBIERE Cedex, France.
*Corresponding Author Email :firstname.lastname@example.org
Tel.: + 225 59 24 31 01
This study evaluated some parameters of Water quality and phytoplankton growth in order to ascertain its seasonality in the lake Taabo (South East of Côte d’Ivoire). Seasonality was mainly due to significant variations in parameters such as conductivity, turbidity, transparency and nutrients (mean values of nitrate and orthophosphate were respectively equal to 1.62 and 10 mg/L). The lake downstream presented some features: oxygenation and mineralization were higher than upstream, at the time. Chlorophyll a ranged from 4.8 to 16.5 mg/L. For algal species composition, 118 taxa distributed into 5 main groups and 45 genera were identified. The algal assemblage was dominated by Chlorophyceae (30.5%), followed by cyanobacteria (27.1%). Conditions prevailing in this biotope favoured a massive phytoplankton growth, dominated by Chlorophyta and Cyanobacteria. Spatial and temporal analysis of nutrient and the composition of phytoplankton community revealed a seasonal variability in the ecosystem of the lake of Taabo which was under anthropogenic stress. This hydro system is growing towards a dystrophic state, thus implies an urgent need for restoration, followed by rehabilitation and process of elimination of solid materials in the lake catchment.
Key words: Phytoplankton community, diversity, structure, nutrient, environmental factors, pollution