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Preliminary Checklist of Phytoplankton and Periphyton in River Okhuo, Nigeria
並列摘要
This study presents the phytoplankton and periphyton diversity of River Okhuo, Edo State, Nigeria from July-December, 2002. Phytoplankton samples were collected using a 55 μm mesh net while periphyton were collected by scrapping wood, stones, leaves and branches and both were preserved separately in 4% formalin. Camera Lucida drawings were taken and a total of 106 species, with more periphyton than phytoplankton were identified using monographs and research publications. The phytoplankton assemblages comprised of Bacillariophyta (43.94%)＞Chlorophyta (42.42%)＞Cyanophyta (6.06%)≥Euglenophyta (6.06%)＞Rhodophyta (1.49%) while for the periphyton, distribution of species were: Chlorophyta (57.83 %)＞Bacillariophyta (25.30%)＞Cyanobacteria (10.84%)＞Euglenophyta (4.82%)＞Rhodophyta (1.21%). Chlorophyta was dominated by desmids, which were largely represented by species of ＂Cosmarium＂ and ＂Closterium＂. The Bacillariophyta was represented by two (2) orders: Centrales and Pennales. Cyanobacteria was grouped into five families: Chroococcaceae, Nostocaceae, Rivulariaceae, Scytonemaceae and Oscillatoriaceae. ＂Euglena＂ (5) and ＂Phacus＂ (2) of Euglenophyta were recorded while ＂Batrachospermum vagum＂ was the only representative of the Rhodophyta.