The present study investigated the water quality of Shitalakhya River, phytoplankton abundance, diversity and the effect of pollutants on phytoplankton as well as the primary productivity. The water of the collected samples was mostly alkaline (7.01-8.2) and showed a wide range of variation in EC (1171-2700 μS/cm), TDS (576-1345 mg/L), DO (0.92-2.7 mg/L), free-CO 2 (15-31 mg/L), BOD (12.03-28.38 mg/L) and COD (101.2-109.2 mg/L). A total of 62 species were identified of which 9 belonged to Chlorophyceae, 11 Cyanophyceae, 14 Euglenophyceae and 28 Bacillariophyceae. Among all the members, Bacillariophyceae were found to be dominant and lowest of Chlorophyceae indicates that this group is more sensitive to the pollutants discharged by the industry.
The study was conducted to investigate the physicochemical and biological parameters of fish culture and reconstructed pond at Jahangirnagar university campus. The physicochemical parameters of water in culture and reconstructed pond were analyzed during February to September, 2014 and the mean value of temperature were 30.21±0.89 ºC and 29.96±0.91 ºC, pH value were 7.20±0.29 and 6.97±0.39, Dissolve Oxygen (DO) value were 6.44±0.40mg-1 and 6.22±0.30mg-1, Biochemical Oxygen Demand (BOD5) value were 1.02±0.32mg-1 and 0.78±0.18mg-1, Total Dissolve Solid (TDS) were 0.69±0.04mg-1 and 0.64±0.04mg-1, Electric Conductivity (EC) value were 215.38±21.27?Scm-1 and 128.58±1.10?Scm-1. From the study of biological parameter, it was found that Chlorophyceae and Euglenophyceae were dominant in studied ponds and the abundance of phytoplankton are in the order of Chlorophyceae >Euglenophyceae > Bacillariophyceae > Cyanophyceae. The highest productivity was found in culture pond which indicates the suitability of using for aquaculture.J. Environ. Sci. & Natural Resources, 9(1): 1-7 2016
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