Vertical distribution of dehalogenating bacteria in mangrove sediment and their potential to remove polybrominated diphenyl ether contamination. Issue 2 (30th November 2017)

• Record Type: Journal Article
• Authors: Pan, Ying; Chen, Juan; Zhou, Haichao; Farzana, Shazia; Tam, Nora F.Y.
• Is Part Of: Marine pollution bulletin. Volume 124:Issue 2(2017)
• Page Start: 1055
• Page End: 1062
• Publication Date: 2017-11-30
• Subjects: PBDEs -- Functional bacteria -- Anaerobic degradation -- Mangrove; 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.2016.12.030
• Languages: English
• ISSNs: 0025-326X

Abstract

Abstract: The removal and degradation of polybrominated diphenyl ethers (PBDEs) in sediments are not clear. The vertical distribution of total and dehalogenating bacteria in sediment cores collected from a typical mangrove swamp in South China and their intrinsic degradation potential were investigated. These bacterial groups had the highest abundances in surface sediments (0–5 cm). A 5-months microcosm experiment also showed that surface sediments had the highest rate to remove BDE-47 than deeper sediments (5–30 cm) under anaerobic condition. The deeper sediments, being more anaerobic, had lower population of dehalogenating bacteria leading to a weaker BDE-47 removal potential than surface sediments. Stepwise multiple regression analysis indicated that Dehalococcoides spp. were the most important dehalogenating bacteria affecting the anaerobic removal of BDE-47 in mangrove sediments. This is the first study reporting that mangrove sediments harbored diverse groups of dehalogenating bacteria and had intrinsic potential to remove PBDE contamination. Graphical abstract: Highlights: Total and functional bacteria had the highest abundances in surface layer sediment. Higher removal rate of BDE-47 was found in surface layer. Removal of BDE-47 in mangrove sediment was mostly affected by Dehalococcoides spp.