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Research Paper | Ecology | Ivory Coast | Volume 12 Issue 8, August 2023 | Popularity: 5.4 / 10

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Quantitative Assessment of Phytoplankton Population Structure and Physicochemical Variability in Lake Buyo, Guessabo Area

Attoungbre Kouakou Severin, Assi Sonan Romuald, Ndri Olga Rosemonde

Abstract: The objective of this study is to quantitatively assess the structure of the phytoplankton population of Lake Buyo in the Guessabo area. To this end, spatial measurements of physicochemical parameters and phytoplankton samplings were carried out according to hydrological cycles. Significant variations in physicochemical parameters were recorded between the different hydrological regimes, except for dissolved oxygen, conductivity, and nitrite. For phytoplankton density, the average values fluctuated from 45.85 x 106 ? 16.63 Cells/L (station G2) to 78.35 x 106 ? 28.83 Cells/L (station G3) in high water and from 41.84 x 106 ? 16.66 Cells/L (station G4) to 67.33 x 106 ? 29.09 Cells/L (station G1) in low water. Cyanobacteria and bacillariophytes dominated the phytoplankton community at all stations for each of the hydrological regimes. Regarding chlorophyll biomass, average values were significantly higher during low water than during high water. These values varied between 11.04 ? 7.99 ?g/L at station G1 and 30.37 ? 21.05 ?g/L at station G7, and between 17.08 ? 13.144 ?g/L at station G4 and 49.21 ? 37.628 ?g/L at station G3. A significant positive correlation was observed between chlorophyll a, phytoplankton density, and conductivity.

Keywords: Phytoplankton, density, chlorophyll a, hydrological regime, eutrophic

Edition: Volume 12 Issue 8, August 2023

Pages: 1415 - 1423

DOI: https://www.doi.org/10.21275/SR23808201210

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