ABSTRACT

The water quality and algal diversity of the stocked and unstocked ponds and the dam reservoir at Gesedaddo farms, Yola, Adamawa State, Nigeria, were assessed for ten months. Meteorological data were accessed from Modibbo Adama University of Technology, Yola. Physico-chemical parameters such as temperature, pH, transparency, conductivity dissolved oxygen, total dissolved solids (TDS),biochemical oxygen demand (BOD), magnesium, potassium, sodium, nitrates, sulphates, phosphates,and some trace elements (iron, copper, and zinc) were determined using standard methods.Thedrop count method was employed in algal microscopy. Algal diversityand species richness were determined using Margarlef and Shannon-Wiener indices. A total of forty algal taxa belonging to four divisions were found. They are Cyanophyta (26.47%), Chlorophyta (44.53%), Bacillariophyta (24.80%) and Euglenophyta (4.20%). All data were subjected to statistical analysis using Analysis of variance ANOVA, Duncan Multiple Range Test DMRT and Correlation coefficient.

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