Analysis of three to five minutes qualitative plankton hauls of Opete waters on 9th December 2000 revealed only thirteen (13) taxa consisting of only seven (7) Bacillariophyta (of 113-124) known species and three (3) Cyanophyta (of 29/30 known species).
A study of phytoplankton in marine ecfo systems in Nigeria was carried out. Phytoplankton samples for qualitative studies were collected by Hydrobios plankton net of 55µm mesh size. Identification was done using a Leitz compound microscope and the density was estimated using a haemocytometer. Water samples were collected into clean plastic containers for chemical analysis while in situ measurement of temperature, pH and conductivity were made.
The distribution of phytoplankton at different salinities in the eastern Niger Delta of Nigeria was investigated. The paper aims to contribute to the dearth of salinity – based distribution of organisms as well as phytoplankton studies in the region. A total of 64 taxa of phytoplankton were identified and classified into four divisions of Bacillariophyta (49 taxa), Chlorophyta (7 taxa), Cyanophyta (4 taxa) and Dinophyta (4 taxa). Salinity was found to produce floristical gradients.
This paper presents a pioneer investigation of the phytoplankton of River Okhuahe located in Uhunmwode Local Government Area of Edo State. Samples were collected Fortnightly for phytoplankton and physico-chemical analysis. Phytoplankton samples were collected by means of 55µm mesh plankton net while water samples for physical and chemical parameters were collected directly into clean plastic containers. The river was acidic, with a pH of 4.97-6.74 and very low in nutrients with a conductivity value of 9.4- 17.9 µScm-1.