ASSESSMENT OF BIOLOGICAL WATER QUALITY OF RIVER GANGA IN PATNA (INDIA) USING BENTHIC MACRO-INVERTEBRATES

被引:2
|
作者
God, Annu [1 ]
Sharma, Jaya [1 ]
Durgapal, Navin Chandra [1 ]
机构
[1] Cent Pollut Control Board, Biosci Lab, New Delhi 110032, India
关键词
Bio-monitoring; diversity; macro-invertebrates; seasonal variation; water quality;
D O I
10.5958/0974-4517.2021.00019.7
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
The present study was carried out to assess the macro-invertebrate diversity in Patna stretch of river Ganga at four sites during 2017-18. Considering fluctuations in river hydrology after rainy season, the study was conducted twice i.e. in summer and late winter. A total 1523 organisms belonging to 11 orders and 43 families were recorded. The operculate members of Gastropoda were found dominating in summer season at all the sampling sites and almost identical values of Shannon-Wiener index in river indicated stabilized ecosystem with moderate level of decomposable organic matter. Occurrence of pollution-sensitive Ephemeroptera families and good quantity of dissolved oxygen at two upstream sites i. e. Digha Ghat and Gandhi Ghat in winter indicated comparatively good biological water quality of river in this stretch. Presence of families like Corixidae and Nephthyidae indicated moderate level of organic matter decay at Malsalami and abundance of Chironomidae larvae at Fatuha reflected the impact of wastewater discharge into the river. Gradual decrease in Shannon-Wiener diversity index supported the impact of pollution at these two downstream sites of Patna stretch of river Ganga.
引用
收藏
页码:136 / 146
页数:11
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