Bacterial status and pollution level in the water of Gulshan Lake, Dhaka

Bangladesh Journal of Zoology

Sirajul Hoque¹  Nazneen Akhter²  Md Abdul Karim² 

[1] Department of Soil,Water and Environment, University of Dhaka, Dhaka 1000;Laboratory of Microbiology, Department of Botany, University of Dhaka,Dhaka-1000

关键词: Aerobic heterotrophic bacteria;    enteric bacteria;    chemical properties;    lake water;   

DOI  :  10.3329/bjz.v40i2.14309

学科分类：动物科学

来源: Zoological Society of Bangladesh

【 摘 要 】

Water samples were collected from four selected sites of the Gulshan lake during four different seasons. Four different media were used to study the aerobic heterotrophic, enteric and related bacterial abundance. Aerobic heterotrophic bacterial abundance ranged between 1×10 6and 9×10 6cfu/100 ml, while enteric and related bacterial abundance in SS agar, MacConkey agar and Cetrimide agar media ranged between 1×10 3and 3×10 5cfu/100 ml, between 1×10 4and 1×10 7 , and between 1×10 0and 1.4×10 3cfu/100 ml, respectively. Among 40 bacterial isolates 14 were selected out of which seven were Gram-positive and seven were Gramnegative. Among Gram-positive isolates, six were rod-shaped spore former belonging toBacillusandLactobacillus,while another one was coccoid in shape and under the genusPlanococcus . Out of seven Gram-negative isolates, two were the members ofPseudomonas , remaining five wereMorganella ,Neisseria ,Escherichia ,AeromonasandEnterobacter . Inorganic nutrients like NH 4+ -N, NO 3+ -N, NO 2+ -N and PO 4+values were found to be satisfactory from pollution point of view. The presence of different bacterial isolates indicate that the Gulshan lake water was polluted with chemical and bacterial pollutants. DOI:http://dx.doi.org/10.3329/bjz.v40i2.14309Bangladesh J. Zool.40 (2): 165-173, 2012

【 授权许可】

Unknown