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A Study on Impact of Dam on Bacterial Profile of Coastal Waters

KrishiKosh

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Title A Study on Impact of Dam on Bacterial Profile of Coastal Waters
 
Creator Sunil, R.
 
Contributor Karunasagar, I.
Indrani Karunasagar
Venugopal, M.N.
Udupa, K.S.
Maragal, M.M.
 
Subject irrigation, sampling, bacteria, surface water, sediment, fruits, seasons, environment, ecosystems, water
 
Description Ph.D. Thesis
The effect of dams built on rivers and their influence on the microbial Biodiversity Was studied by comparing the microbial profile of two rivers of Karnataka. one with dam (River Sharavathi) and another without (River Ncthravathi), Surface. Bottom and sediment samples "were drawn from the riverine, estuarine and coastal region. It was found bacterial counts were higher in sediment samples compared la water samples from both the rivers at the sites. Presumptive and fecal Streptococcal counts were high in riverine and estuarine waters but low in seawater. Fecal streptococcal counts were high in estuarine and seawater. The ratio of fecal of coliform to fecal streptococci (FC/FS) indicated that there was a fecal contamination in these aquatic habitats by human and animals. Bacterial counts were found to be higher in surface water samples from in Nethravathi when compared to samples from river Sharavathi ANOVA (statistical analysis) showed significance of difference between rivers, stations.
Seasons and depths with respect to various bacterial groups found in these aquatic habitats. Prevalence of Salmonella in samples from river Ncthravathi and Sharavathi was quite low (0.5). All the four isolates, which were biochemically confirmed, were also positive by PCR targeting hns gene coding for DNA biding protein. The variations in different bacterial groups in river Sharavathi cannot be attributed solely to the presence of dam across this river
but other physico-chemical, biological, geological and climatic factors that might have influenced bacterial diversity and abundance in these aquatic habitats. It is concluded that there was no significant effect of dam on microbial diversity as seen from monthly sampling of the two rivers during the two year study period (May 2001 to April 2003).
 
Date 2016-07-04T16:12:42Z
2016-07-04T16:12:42Z
2005-09-12
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/68440
 
Language en
 
Format application/pdf
 
Publisher Karnataka Veterinary, Animal and Fisheries Sciences University, Bidar