Impact of silver nanoparticles on benthic prokaryotes in heavy metal-contaminated estuarine sediments in a tropical environment. Issue 1 (15th October 2015)

• Record Type: Journal Article
• Authors: Antizar-Ladislao, B.; Bhattacharya, B.D.; Ray Chaudhuri, S.; Sarkar, S.K.
• Is Part Of: Marine pollution bulletin. Volume 99:Issue 1/2(2015)
• Page Start: 104
• Page End: 111
• Publication Date: 2015-10-15
• Subjects: Microbial dynamics -- Nanoparticles -- Hugli estuary -- Sediment -- Sundarban; Marine pollution -- Periodicals; Marine Biology -- Periodicals; Water Pollution -- Periodicals; Mer -- Pollution -- Périodiques; Publications périodiques; Pollution des mers; Lutte antipollution; Electronic journals; 363.7394
• DOI: 10.1016/j.marpolbul.2015.07.051
• Languages: English
• ISSNs: 0025-326X

Abstract

Highlights: Some microbial communities in estuarine systems may be resistant to Ag-NPs. Ag-NPs stress can have an antimicrobial effect on key microorganisms. Ag-NPs have the potential to shape estuarine sediment bacterial community structure. 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.