Document Type

Journal Article

Department/Unit

Department of Biology

Title

Interactive effects of hypoxia and polybrominated diphenyl ethers (PBDEs) on microbial community assembly in surface marine sediments

Language

English

Abstract

Hypoxia alters the oxidation-reduction balance and the biogeochemical processes in sediments, but little is known about its impacts on the microbial community that is responsible for such processes. In this study, we investigated the effects of hypoxia and the ubiquitously dispersed flame-retardant BDE47 on the bacterial communities in marine surface sediments during a 28-days microcosm experiment. Both hypoxia and BDE47 alone significantly altered the bacterial community and reduced the species and genetic diversity. UniFrac analysis revealed that BDE47 selected certain bacterial species and resulted in major community shifts, whereas hypoxia changed the relative abundances of taxa, suggesting slower but nonetheless significant community shifts. These two stressors targeted mostly different taxa, but they both favored Bacteroidetes and suppressed Gammaproteobacteria. Importantly, the impacts of BDE47 on bacterial communities were different under hypoxic and normoxic conditions, highlighting the need to consider risk assessments for BDE47 in a broader context of interaction with hypoxia. © 2014 Elsevier Ltd.

Keywords

Bacterial communities, Hypoxia, Marine sediment, Polybrominated diphenyl ethers

Publication Date

2014

Source Publication Title

Marine Pollution Bulletin

Volume

85

Issue

2

Start Page

400

End Page

409

Publisher

Elsevier

DOI

10.1016/j.marpolbul.2014.04.052

ISSN (print)

0025326X

ISSN (electronic)

18793363

This document is currently not available here.

Share

COinS