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- Title
Seasonal Variation of the Hydro-Environmental Factors and Phytoplankton Community around Waters in Tincan Island, Lagos State, Nigeria.
- Authors
OKERE, M. C.; DAVIES, I. C.; OKONKWO, S. E.
- Abstract
The phytoplankton diversity, pigment, abundance and distribution in relation to physico-chemical parameters were studied from four stations for a period of five months (May - September 2018) and were analysed using standard procedures. Rainfall was highest (329.5 mm) in September and lowest (142.7 mm) in July. The total suspended solid (TSS) had a mean value of 63.10±12.81 mg/L and the total dissolved solids (TDS) had the highest value of 15189 mg/L in May which was not significantly different around the sampling points {P > 0.05}. The pH and nitrate level recorded had a mean value of 7.25±0.33 and 3.11±1.33 mg/L respectively. Microscopic identification revealed a total of 129 species belonging to 62 genera, 22 families and five divisions in the following order of specie abundance: Bacillariophyceae (65 taxa) > Cyanophyceae (27 taxa) > Chlorophyta (20 taxa) > Dinophyceae (10 taxa) > Euglenophyceae (7 taxa). The high dominance of Microcystis aeruginosa observed was indicative of organic pollution. The range of community structure indices were as follows: Margalef Index (0.1406 - 5.295) and Shannon -- Weiner Index (0.02644 - 0.4979). The relatively high nutrient status favours the high abundance of phytoplankton which is understood to be deleterious to the ecosystem. Municipal wastes must be treated or recycled before discharge and a continuous environmental surveillance is required to maintain the biological integrity of this area.
- Subjects
LAGOS State (Nigeria); NIGERIA; PHYTOPLANKTON; DIATOMS; DINOFLAGELLATES; CHRYSOPHYCEAE; ISLANDS; EUGLENOIDS; MICROCYSTIS aeruginosa
- Publication
Journal of Applied Sciences & Environmental Management, 2020, Vol 24, Issue 10, p1739
- ISSN
1119-8362
- Publication type
Article
- DOI
10.4314/jasem.v24i10.6