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Mar Pollut Bull. 2015 Oct 15;99(1-2):104-11. doi: 10.1016/j.marpolbul.2015.07.051. Epub 2015 Jul 29.

Impact of silver nanoparticles on benthic prokaryotes in heavy metal-contaminated estuarine sediments in a tropical environment.

Author information

1
Emerald Energy Consultancy Ltd, England LN7 6GN, United Kingdom. Electronic address: B_antizar@hotmail.com.
2
Department of Marine Science, University of Calcutta, 35 Ballygunge Circular Road, Calcutta 700019, India.
3
West Bengal University of Technology, BF 142, Sector I, Salt Lake, Calcutta 700064, India.

Abstract

Little knowledge is available about the potential impact of commercial silver nanoparticles (Ag-NPs) on estuarine microbial communities. The Hugli river estuary, India, is susceptible to heavy metals pollution through boat traffic, and there is the potential for Ag-NP exposure via effluent discharged from ongoing municipal and industrial activities located in close proximity. This study investigated the effects of commercial Ag-NPs on native microbial communities in estuarine sediments collected from five stations, using terminal restriction fragment length polymorphism (T-RFLP) technique. An increase in the number of bacteria in consortium in sediments was observed following exposure to Ag-NPs. In general microbial communities may be resistant in estuarine systems to the antimicrobial effects of commercial Ag-NPs, but key microorganisms, such as Pelobacter propionicus, disappeared following exposure to Ag-NPs. In conclusion, the T-RFLP analysis indicated that Ag-NPs have the potential to shape estuarine sediment bacterial community structure.

KEYWORDS:

Hugli estuary; Microbial dynamics; Nanoparticles; Sediment; Sundarban

PMID:
26231062
DOI:
10.1016/j.marpolbul.2015.07.051
[Indexed for MEDLINE]

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