Phytoplankton Diversity and Abundance in Relation to Pollution Levels in the Hazaribagh Tannery Effluent Sewage Water of the River Buriganga

[摘要] About 185 leather processing industries have been operating in Hazaribagh and discharging solid and liquid wastes to the downstream areas of the river Buriganga and to the canals around. The physico-chemical parameters and biological examination of tannery effluents sewage water were carried out in relation to phytoplankton abundance at four selected points (viz. Kamrangirchar: K1, K2 and K3; Hazaribagh Tempo Stand: H) of the Buriganga river from October  2009 to September 2010. Altogether 27 genera of Phytoplankton belonging to the families Cyanophyceae, Bacillariophyceae, Chlorophyceae, Euglenophyceae and Cryptophyceae were identified from the above points. Merismopedia was the most abundant form (3.6×10 4 - 2.4×10 6 cell/L) compared to those (1.4-72 ×10 3 cell/l) genera of other phytoplankton ( Nitzschia , Synedra , Pleurosigma , Euglena , Strusastrum , Crucigenia , Ourococcus ) at K1, the station closest to the tannery  effluent outfall. The abundance of Merismopedia increased gradually (K2: 6.45×10 4 - 3.68×10 6 , K3: 6.95×10 4 -1.68x10 7 and H: 1.0×10 5 - 2.06×10 7 ) along with the decreasing pollutant concentrations of the water. DOI: http://dx.doi.org/10.3329/bjz.v40i1.12901 Bangladesh J. Zool. 40 (1): 121-128, 2012

[学科分类] 动物科学

[关键词] Phytoplankton;Tannery effluent;Buriganga river;Pollution;Merismopedia;Cyanophyceae;Bacillariophyceae