Composition and seasonal variation of phytoplankton community in Lake Hlan, Republic of Bénin

Arsène Mathieu Houssou, Hyppolite Agadjihouédé, Clément Agossou Bonou, Elie Montchowui


Knowledge of biodiversity of aquatic ecosystems is nowadays a challenge for global research. Phytoplankton being very important in the sustainability of ecosystems, its mastery allows the development of early monitoring and evaluation tools of the health status of aquatic environments. The study aims to make an initial inventory of phytoplankton of the lake Hlan and to evaluate the influence of hydrologic season on its dynamics. Plankton samples were collected monthly between May and December 2012 using plankton net of 30 µm size. They were then treated and species identified using light microscopy. 39 species in 7 classes (Bacillariophyceae, 18 species in 10 genera), (Cyanophyceae, 5 species in 5 genera), (Chlorophyceae, 5 species in 3 genera), (Zygnematophyceae, 3 species in 2 genera), (Trebouxiophyceae, 2 species in 2 genera) (Euglenophyceae, 4 species in 3 genera) and (Dinophyceae, 2 species in 2 genera) have been identified. The Shannon index varied between 4.8 and 5.1 bit cell-1. This shows that the ecosystem is balanced. Nevertheless, the presence of potentially toxic species requires a monitoring program for Lake Hlan.


Cyanobacteria, Diatoms, Dinoflagellate, Hydrological season, Phytoplankton diversity.

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Atanle K., Bawa M.L., Kokou K., Djaneye-Boundjou G. (2012). Caractérisation physico-chimique et diversité phytoplanctonique des eaux du lac de Zowla (Lac Boko), Togo. International Journal of Biological and Chemical Sciences, 6(1): 543-558.

Atanle K., Bawa M.L., Kokou K., Djaneye-Boundjou G., Edorh M.T. (2013). Distribution saisonnière du phytoplancton en fonction des caractéristiques physico-chimiques du lac de Zowla (Lac Boko) dans le Sud-Est du Togo: cas de la petite saison sèche et de la grande saison sèche. Journal of Applied Biosciences, 64: 4847-4857.

Barinova S.S., Tavassi M., Nevo E. (2005). Algal indicator system of environmental variables in the Hadera River basin, central Israel. Plant Biosystems, 140(1): 65-79.

Barinova S.S., Medvedeva L.A., Anissimova O.V. (2006). Diversity of algal indicators in the environmental assessment. Pilies Studio, Tel Aviv, 498 p.

Barinova S.S., Nevo E. (2012). Climatic and pollution impact on algal diversity of the freshwater ecosystems in Eurasia. In: Climate Change and Impacts. Cheyenne W.Y., USA. Academy Publish. org. pp: 16-50.

Bennouna A., Assobhei O., Berland B., El Attar J. (2000). Étude des populations phytoplanctoniques de la lagune de Oualidia (Maroc); dinoflagellés potentiellement nuisibles. Marine Life, 10(1-2): 3-18.

Bellinger E.G., Sigee D.C. (2010). Freshwater algae, Identification and use as bioindicators. Wiley-Blackwell, John Wiley and Sons. 285 p.

Chorus I., Bartrum J. (1999). Toxic Cyanophyta in Water: A guide to their public health consequences, monitoring and management. London and New York, Spon Press. 400 p

Compère P. (1974). Algues de la région du lac Tchad, II: Cyanophycées. Cahier O.R.S.T.O.M. Série Hydrobiologie, 8(3-4): 165-198.

Compère P. (1975). Algues de la région du lac Tchad, IV: Diatomophycées. Cahier O.R.S.T.O. Série Hgdrobiologie, 9(4): 205-290.

CREL (Conseil Régional de l'Environnement des Laurentides). (2009-2011). Rapport d’interprétation des résultats. Lac des Becs-Scie, Municipalité de Saint-Sauveur. Suivi complémentaire de la qualité de l’eau du programme Bleu Laurentides.

Djediat C., Malécot M., de Luze A., Bernard C., Puiseux-Dao S., Edery M. (2010). Localization of microcystin-LR in medaka fish tissues after cyanotoxin gavage. Toxicon, 55: 531-535.

Frontier S. (1973). Statistical study of zooplankton dispersion. Journal of Experimental Marine Biology and Ecology, 12: 229-262.

Gao X., Song J. (2005). Phytoplankton distributions and their relationship with the environment in the Changjiang Estuary, China. Marine Pollution Bulletin, 50: 327-335.

Houssou A.M., Agadjihouédé H., Montchowui E., Bonou C.A., Lalèyè P. (2015). Structure and seasonal dynamics of phytoplankton and zooplankton in Lake Azili, small Lake of the pond of River Ouémé, Benin. International Journal of Aquatic Biology, 3(3): 161-171.

Houssou A.M., Yaovi R., Ahouansou Montcho S., Bonou C.A., Montchowui E. (2016). Diversity and seasonal variation of zooplankton of Lake Hlan, Republic of Bénin (West Africa). Journal of Applied Biosciences, 102: 9723-9737.

Kemka N., Njine T., Zébazé Togouet S.H., Niyitegeka D., Nola M., Monkiedje A., Demannou J., Foto Menbohan S. (2004). Phytoplancton du lac municipal de Yaoundé (Cameroun): Succession écologique et structure des peuplements. Journal of Water Science, 17(3): 301-316.

Kinross J. (2007). Summary investigation on the phytoplankton of the Rivers Almond and Creran, Available at (accessed June 26th, 2012).

Leland H.V., Porter S.T. (2000). Distribution of benthic algae in the Illinois River basin in relation to geology and land use. Freshwater Biology, 44: 279-301.

Madhu N.V., Jyothibabu R., Balachandran K.K., Honey U.K. Martin G.D., Vijay J.G., Shiyas C.A., Gupta G.V.M., Achuthankutty C.T. (2007). Monsoonal impact on planktonic standing stock and abundance in a tropical estuary (Cochin backwaters-India). Estuarine, Coastal and Shelf Science, 73: 54-64.

Maestrini S.Y., Robert J.M. (1981). Rendements d'utilisation des sels nutritifs et variations de l'état des cellules de trois diatotnées de Claire à huîtres de Vendée. Oceanologica acta, 4(1): 13-22.

Montchowui E., Chikou A., Kogbeto M-J., Laleye P. (2008). Biodiversité et structure des communautés de poissons du lac Hlan au Bénin, International Journal of Biological and Chemical Sciences, 2(2): 196-206.

Nogueira N.M.C., Correia F.M.M. (2000). Cyanophyceae/Cyanobacteria in red mangrove forest at mosquitos and coqueiros estuaries, são luís, state of maranhão, Brazil. Brazilian Journal of Biology, 61: 1519-6984.

Oyadomari J. (2011). Diatom Gallery. Keweenaw Waterway at MTU Surface plankton two. Available at (accessed June 26th 2012)

Prescott G.W. (1954). The freshwater algae. Pictured key, Nature series. Ed. H.E. Jaques. 224 p.

Simboura N., Zenetos A. (2002). Benthic indicators to use in ecological quality classification of Mediterranean soft bottom marine ecosystems, including a new biotic index. Mediterranean Marine Sciences, 3: 77-111.

Tsukii Y. (2005). Gomphonema vibrio Ehrenberg, Cell body. Available at menuE.html (accessed July 12th 2012).

VanLandingham S.L. (1982). Guide to the identification, environmental requirements and pollution tolerance of freshwater blue-green algae (Cyanophyta). Environmental Monitoring and Support Laboratory, Office of Research and Development, US Environmental Protection Agency. 349 p.


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