Bacterioplankton composition and diversity of Awba Dam Reservoir, Southwestern Nigeria
November 10, 2020
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| Article Title: | Bacterioplankton composition and diversity of Awba Dam Reservoir, Southwestern Nigeria |
| Authors: | Ayoade A. A., Nierziwicki-Bauer S. A. |
| Affiliation: | Darrin Freshwater Institute, Rensselaer Polytechnic Institute, 5060 Lake Shore Drive, Bolton Landing, New York Fisheries and Hydrobiology Unit, Department of Zoology, University of Ibadan, Oyo State, Nigeria |
| Abstract: | Bacterioplankton community composition in the Awba dam reservoir, a man-made lake located in the University of Ibadan, the first university on sub-Saharan region of West Africa was characterized using 16S rRNA gene clone library construction. Some physico-chemical characteristics of the reservoir were also evaluated. The mean nitrate concentration of the Awba reservoir exceeded the set limits. Bacterial 16S rRNA gene sequences from Awba stream and reservoir exhibited broad phylogenetic diversity, including sequences representing the Alphaproteobacteria, Betaproteobacteria, Gammaproteobacteria, Deltaproteobacteria, Actinobacteria, Bacteriodetes, Lentisphaerae, Firmicutes, Verrucomicrobia and Cyanobacteria. Proteobacteria was the dominant phylum in the study area and members of Betaproteobacteria subdivision were the most abundant in all sampling sites. The Shannon Weiner (2.44) and Evenness (0.95) diversity indices of the reservoir was higher than lotic site. A remarkable portion of the operational taxonomic unit could not be classified into any known taxonomic unit. The study had contributed to the growing data set on the composition of bacteria communities in tropical freshwater ecosystem. |
| Keywords: | Awba dam reservoir, bacterial community composition, 16S rRNA clone library, diversity indices, tropical freshwater lake |
| *Correspondence: | Adedolapo Ayoade, Fisheries and Hydrobiology Unit, Department of Zoology, University of Ibadan, Oyo State, Nigeria, Tel, +234-8033855807, email: kenpeadobece@gmail.com |
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