Author(s)

Kandana Marthe Yéo^1*, Koffi Komoé², Estelle Sévérine Konan³, Droh Lanciné Goné⁴

¹Ecology Research Center, University Nangui Abrogoua, Abidjan, Côte d’Ivoire.
²Department of Botany, University Felix Houphouët Boigny-Abidjan, Abidjan, Côte d’Ivoire.
³Oceanology Research Center, BP V 18 Abidjan, Côte d’Ivoire.
⁴Laboratory of Geosciences and Environment, University Nangui Abrogoua, Abidjan, Côte d’Ivoire.

Investigations were carried out on spatial and seasonal composition, distribution and abundance of phytoplankton in Adjin lagoon located in south-eastern of Côte d’Ivoire. Samples were collected at six stations during the four seasons in 2013 year. Freshwater inflow from Bété, Djibi and Mé Rivers influenced the variability of nutrients concentration in this lagoon. From a seasonal point of view, the parameters studied are significantly affected by freshwater inputs during the rainy season. This period is characterized by high values of turbidity, suspended solids and nutrients in the water. Overall, 66 taxa from six phyla were recorded. The Chlorophyta had the highest species diversity and Cyanobacteria had the highest relative abundance throughout the year. The temporal distribution of phytoplankton showed that the highest values of density were recorded in the long rainy season and the lowest values in the long dry season. Spatially, the highest abundance (297,927 × 10³ cells·L^-1) of phytoplankton was found in station 3 and the lowest (74,222 × 10³ cells·L^-1) in the station 5.

Adjin Lagoon, Distribution, Diversity, Phytoplankton, Nutrients

Yéo, K. , Komoé, K. , Konan, E. and Goné, D. (2023) Seasonal and Spatial Variations of Phytoplankton in Relation to Physico-Chemical Parameters in Adjin Lagoon, Abidjan, Côte d’Ivoire, West Africa. Journal of Water Resource and Protection, 15, 509-525. doi: 10.4236/jwarp.2023.1510028.