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Cette etude a ete realisee dans le but de determiner les caracteristiques physico-chimiques et la diversite phytoplanctonique de l’eau des mares Dindin, Lotoe, Lagoe et Afi. Pour ce faire, dix sites de prelevement ont ete retenus et repartis dans ces mares dans le mois de juillet et aout 2015. Les parametres physico-chimiques ont ete determines suivant les normes AFNOR. L’identification et le denombrement du phytoplancton ont ete faits au microscope photonique de marque Nikon Eclipse 0,90 Dry. L’etude a revele une turbidite, un pH et un taux d’oxygene dissous eleves dans les mares Afi et Lagoe avec des valeurs maximales de 8,25 NTU ; 8,14 et 9,75 mg/L. A Dindin, une conductivite electrique elevee de 590 μS/cm et un taux d’oxydabilite au KMnO4 eleve etaient notes. La mare Lotoe est particuliere par sa profondeur et sa transparence. La communaute phytoplanctonique des mares est composee de 107 especes regroupees en 7 classes et 5 embranchements. Les especes de la classe des Chlorophycees sont plus diversifiees. Au niveau des mares Afi et Lagoe, respectivement 62 et 65 especes etaient recensees et a Dindin et Lotoe, respectivement 46 et 37 especes. Cette etude montre en outre, une dominance d’Euglenophycees au niveau de la mare Dindin et de Cyanophycees au niveau des mares Afi et Lagoe. Le taux eleve d’oxygene dissous des mares Afi et Lagoe fait de ces mares des milieux eutrophes. © 2017 International Formulae Group. All rights reserved . Mots cles: Phytoplancton, Parametres physico-chimiques, plan d’eau, Afrique de l’Ouest English Title: Characterization of physico-chemical parameters and diversity of phytoplankton of some the ponds at the south side of the biosphere Park of Togodo (South Togo) English Abstract This study was initiated in order to determine the physico-chemical parameters and the diversity of phytoplankton of the ponds Dindin, Lotoe, Lagoe and Afi. Then, covering all the ponds were selected in July and August 2015. The physico-chemical parameters were determined according to the AFNOR Standards. Identification and counts of phytoplankton were made in brand light microscope Nikon Eclipse 0.90 Dry. The study found a turbidity, pH and high oxygen levels in the ponds of Afi and Lagoe with respective maximum values are 8.25 NTU; 8.14 and 9.75 mg/L. At Dindin, a high electrical conductivity of about 590 μS/cm and high oxydability of KMnO4 were observed. Lotoe, was particular by its depth and high transparency. According to the diversity of phytoplankton population, 107 species grouped into 7 classes and 5 phyla were identified. The species of the class of Chlorophyceae were more diversified. At Afi and Lagoe ponds 62 and 65 species were respectively identified. But at Dindin and Lotoe, 46 and 37 species were respectively identified. This study also shows a dominance of Euglenophyceae with a high component at the Dindin pond and Cyanophyceae at Afi and Lagoe ponds. The high dissolved oxygen content of the Afi and Lagoe pools makes these pools eutrophic pools. © 2017 International Formulae Group. All rights reserved. Keywords: Phytoplankton, physico-chemical parameters, pond, West Africa

Caractérisation physico-chimique et diversité du peuplement phytoplanctonique des mares au sud de la réserve de faune de Togodo (sud-Togo)