Plankton Abundance and Diversity of Eleyele River, Oyo State

Author(s)

Oyetunji, O. T , Obikoya, R. T ,

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Volume 7 - April 2023 (04)

Abstract

The plankton composition and distribution were studied in river Eleyele, Ibadan, Nigeria. The investigation was carried out from November 2010 to April 2011 at five sampling stations and at the surface and 1m depth. Zooplankton comprises of 14 species belonging to 4 families at both the surface and at 1m depth namely; Protozoa, Rotifers, Cladocera and Copepods. Protozoa dominated the population at the surface (74%) and at 1m (88%) depth, Phacus longi having the highest overall population of the protozoans. Phytoplankton during the study comprises of 10 species belonging to 3 families at both the surface and at 1m depth namely; Baccillariophyta, Cyanophyta and Chlorophyta. Baccilariophyta dominated the population at the surface (82%) and at 1m (84%) depth, Diatoms having the highest population of the Baccilariophyta at both surface and 1m depth. Phytoplankton and Zooplankton population was highest at the surface (63%, 55%) water level when compared with the population at 1m (37%, 45%) depth.The Sorenson’s index of similarity for both planktons showed similarities during the period of study. The Margalef’s index of species diversity showed low diversity in terms of the specie composition during the study especially at 1m depth of the water body.

Keywords

Plankton, Margalef’s index, Sorenson’s index, Eleyele

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