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506372 
Journal Article 
Hydrochemistry and plankton dynamics of Kuramo lagoon 
Nwankwo, DI; Owoseni, TI; Usilo, DA; Obinyan, I; Uche, AC; Onyema, IC 
2008 
1 
Life Science Journal
ISSN: 1097-8135 
5 
3 
83-88 
English 
WOS:000265883800014 
The hydrochemistry and plankton dynamics of the Kuramo lagoon was investigated between November, 2000 and August, 2001. Whereas the lagoon remained low brackish (S% < 4.39%) and alkaline (pH > 7.8) all through the sampling period, the dissolved oxygen (DO) and biochemical oxygen demand (BOD5) values (< 3.50 mg/L; > 21 mg/L) indicated stress. Although nutrient levels at the lagoon were high (NO3-N > 1.58 mg/L; PO4-P < 0.35 mg/L; SO42- > 449.9 mg/L), heavy metal values were low (Fe < 1.91 mg/L, Cu < 0.32 mg/L, Pb Trace). The occurrence of Nitzschia palea, Cyclotella meneghiniana, Gomphonema parvulum, Pinnularia pyrum, P. gibba (diatoms), Euglena viridis, Lepocinclis texta (euglenoids), Microcystis aeruginosa, M. flos-aquae (cyanobacteria), Brachionus angularis, B. calicyflous, B. urceolaris (rotifers) in high numbers may highlight pollution stress in the lagoon. The proliferation of the cyanophyta and other plankton species encountered were controlled by the nutrient level. The physico-chemical characteristics, Margalef, Shannon and Wiener and Equitability indices indicated pollutions stress and dominance by a few species. [Life Science Journal. 2008; 5(3): 83-88] (ISSN: 1097-8135). 
closed lagoon; eutrophic; hydroclimate; plankton dynamics; tropical; nigeria; phytoplankton