JAFE Vol. 5 (3): 30-37

Distribution, Abundance and Diversity of Phytoplankton in Onah Lake, Asaba, Delta State, Nigeria

Onwudiwe, N.P., Ikenga, E.E., Garba, A.A., Adaka, G.S. and Olele, N.F.

ABSTRACT
Phytoplankton composition, abundance and distribution could be used to evaluate the health of aquatic habitats. Phytoplankton was harvested from surface water of Onah Lake between February and May 2018. Fifty-eight (58) phytoplankton individuals were identified from the stations, accounting for four classes and ten genus. Stations “C” had (21) individuals followed by stations “A” with (20) individuals, while stations “B” recorded the least (17) number of individuals. The dominant phytoplankton flora was Closterium sp accounting for (13) individuals, while Stigeodium sp accounted for the least (1) number. Temporal distribution and composition of phytoplankton showed that the highest (19) number was encountered in February, followed by March (17) while May had the least (10) number. Biological diversity indices show that the water body was poor in phytoplankton species. Regular checks in the assessment of phytoplankton of water bodies are recommended, as it will enable hydrologist ascertain any increase or decrease in phytoplankton that could result in pollution or improve water quality over time.                

Keywords:

Distribution, Abundance, Diversity, Phytoplankton, Onah Lake

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