Water quality and plankton periodicity in two contrasting mine lakes in Jos,Nigeria |
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| Authors: | D I Anadu A Obioha C Ejike |
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| Institution: | (1) Applied Fisheries and Hydrobiology Research Unit, Department of Zoology, University of Jos, Jos, Nigeria;(2) Present address: Department of Animal Production and Aquaculture, Anambra State University of Technology, Abakaliki Campus, Nigeria;(3) Present address: Eziachi Secondary School, Box 400, Orlu, Imo State, Nigeria;(4) Present address: Anambra State University of Technology, Enugu, Nigeria |
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| Abstract: | Water quality and plankton periodicity was studied in two mine lakes near Jos in the younger granite area of Plateau State, Nigeria. The investigation was carried out for 8 months. Transparency, pH and NO3-N were significantly higher in Lake II while DOM, alkalinity, PO
4
3–
-P, BOD and chloride were significantly higher in Lake I. The order of dominance in Lake I was Bacillariophyceae, Cyanophyceae, Chlorophyceae and Dinophyceae while for Lake II; Chlorophyceae, Cyanophyceae, Bacillariophyceae and Dinophyceae. In Lake I the zooplankton in order of dominance were Cladocera, Rotifera, Copepoda, and nauplii and in Lake II Cladocera, Copepoda, Rotifera and nauplii. Although both lakes would seem unproductive based on the PO
4
3–
-P and NO
3
–
-N levels, Lake I appears more productive than Lake II. |
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| Keywords: | mine lakes oligotrophic plankton productivity eutrophic |
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