Diversity and Dynamics of Microbial Community Structure in Different Mangrove, Marine and Freshwater Sediments During Anaerobic Debromination of PBDEs
Little is known about the diversity and succession of indigenous microbial community during debromination of polybrominated diphenyl ethers (PBDEs). This study examined the diversity and dynamics of microbial community structure in eight saline (mangrove and marine) and freshwater sediment microcosm...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2018-05-01
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| Series: | Frontiers in Microbiology |
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| Online Access: | http://journal.frontiersin.org/article/10.3389/fmicb.2018.00952/full |
| _version_ | 1811316738305818624 |
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| author | Ya Fen Wang Ya Fen Wang Hao Wen Zhu Ying Wang Xiang Ling Zhang Nora Fung Yee Tam Nora Fung Yee Tam |
| author_facet | Ya Fen Wang Ya Fen Wang Hao Wen Zhu Ying Wang Xiang Ling Zhang Nora Fung Yee Tam Nora Fung Yee Tam |
| author_sort | Ya Fen Wang |
| collection | DOAJ |
| description | Little is known about the diversity and succession of indigenous microbial community during debromination of polybrominated diphenyl ethers (PBDEs). This study examined the diversity and dynamics of microbial community structure in eight saline (mangrove and marine) and freshwater sediment microcosms exhibiting different debrominating capabilities for hexa-BDE 153, a common congener in sediments, using terminal restriction fragment length polymorphism (T-RFLP) and clone library analyses. The results showed that microbial community structure greatly differed between the saline and freshwater microcosms, likely leading to distinct variations in their debrominating capabilities and pathways. Higher relative abundances of Chloroflexi and Deltaproteobacteria succeed by Alphaproteobacteria and Betaproteobacteria were detected in the two mangrove microcosms with the fastest debrominating capabilities mainly via para pathway, respectively; the dominance of Alphaproteobacteria resulted in less accumulation of tetra-BDEs and more complete debromination of lower brominated congeners (from di- to tetra-BDEs). Meanwhile, the shifts in both microbial community structure and PBDE profiles were relatively small in the less efficient freshwater microcosms, with relatively more ortho and meta brominated products of BDE-153 resulted. Coincidently, one of the freshwater microcosms showed sudden increases of Chloroflexi and Deltaproteobacteria by the end of incubation, which synchronized with the increase in the removal rate of BDE-153. The significant relationship between microbial community structure and PBDEs was confirmed by redundancy analysis (18.7% of total variance explained, P = 0.002). However, the relative abundance of the well-known dechlorinator Dehalococcoides showed no clear correlation with the debrominating capability across different microcosms. These findings shed light in the significance of microbial community network in different saline environments on enhancement of PBDE intrinsic debromination. |
| first_indexed | 2024-04-13T11:54:48Z |
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| institution | Directory Open Access Journal |
| issn | 1664-302X |
| language | English |
| last_indexed | 2024-04-13T11:54:48Z |
| publishDate | 2018-05-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Microbiology |
| spelling | doaj.art-37056cce99e141c39aea7cb2e45bc9aa2022-12-22T02:47:56ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2018-05-01910.3389/fmicb.2018.00952346023Diversity and Dynamics of Microbial Community Structure in Different Mangrove, Marine and Freshwater Sediments During Anaerobic Debromination of PBDEsYa Fen Wang0Ya Fen Wang1Hao Wen Zhu2Ying Wang3Xiang Ling Zhang4Nora Fung Yee Tam5Nora Fung Yee Tam6Laboratory of Basin Hydrology and Wetland Eco-restoration, School of Environmental Studies, China University of Geosciences, Wuhan, ChinaDepartment of Biology and Chemistry, City University of Hong Kong, Kowloon Tong, Hong KongDepartment of Biology and Chemistry, City University of Hong Kong, Kowloon Tong, Hong KongDepartment of Biology and Chemistry, City University of Hong Kong, Kowloon Tong, Hong KongSchool of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, ChinaDepartment of Biology and Chemistry, City University of Hong Kong, Kowloon Tong, Hong KongState Key Laboratory in Marine Pollution, City University of Hong Kong, Kowloon Tong, Hong KongLittle is known about the diversity and succession of indigenous microbial community during debromination of polybrominated diphenyl ethers (PBDEs). This study examined the diversity and dynamics of microbial community structure in eight saline (mangrove and marine) and freshwater sediment microcosms exhibiting different debrominating capabilities for hexa-BDE 153, a common congener in sediments, using terminal restriction fragment length polymorphism (T-RFLP) and clone library analyses. The results showed that microbial community structure greatly differed between the saline and freshwater microcosms, likely leading to distinct variations in their debrominating capabilities and pathways. Higher relative abundances of Chloroflexi and Deltaproteobacteria succeed by Alphaproteobacteria and Betaproteobacteria were detected in the two mangrove microcosms with the fastest debrominating capabilities mainly via para pathway, respectively; the dominance of Alphaproteobacteria resulted in less accumulation of tetra-BDEs and more complete debromination of lower brominated congeners (from di- to tetra-BDEs). Meanwhile, the shifts in both microbial community structure and PBDE profiles were relatively small in the less efficient freshwater microcosms, with relatively more ortho and meta brominated products of BDE-153 resulted. Coincidently, one of the freshwater microcosms showed sudden increases of Chloroflexi and Deltaproteobacteria by the end of incubation, which synchronized with the increase in the removal rate of BDE-153. The significant relationship between microbial community structure and PBDEs was confirmed by redundancy analysis (18.7% of total variance explained, P = 0.002). However, the relative abundance of the well-known dechlorinator Dehalococcoides showed no clear correlation with the debrominating capability across different microcosms. These findings shed light in the significance of microbial community network in different saline environments on enhancement of PBDE intrinsic debromination.http://journal.frontiersin.org/article/10.3389/fmicb.2018.00952/fullPBDEsmangrove sedimentmicrobial communityreductive debrominationT-RFLPsalinity |
| spellingShingle | Ya Fen Wang Ya Fen Wang Hao Wen Zhu Ying Wang Xiang Ling Zhang Nora Fung Yee Tam Nora Fung Yee Tam Diversity and Dynamics of Microbial Community Structure in Different Mangrove, Marine and Freshwater Sediments During Anaerobic Debromination of PBDEs Frontiers in Microbiology PBDEs mangrove sediment microbial community reductive debromination T-RFLP salinity |
| title | Diversity and Dynamics of Microbial Community Structure in Different Mangrove, Marine and Freshwater Sediments During Anaerobic Debromination of PBDEs |
| title_full | Diversity and Dynamics of Microbial Community Structure in Different Mangrove, Marine and Freshwater Sediments During Anaerobic Debromination of PBDEs |
| title_fullStr | Diversity and Dynamics of Microbial Community Structure in Different Mangrove, Marine and Freshwater Sediments During Anaerobic Debromination of PBDEs |
| title_full_unstemmed | Diversity and Dynamics of Microbial Community Structure in Different Mangrove, Marine and Freshwater Sediments During Anaerobic Debromination of PBDEs |
| title_short | Diversity and Dynamics of Microbial Community Structure in Different Mangrove, Marine and Freshwater Sediments During Anaerobic Debromination of PBDEs |
| title_sort | diversity and dynamics of microbial community structure in different mangrove marine and freshwater sediments during anaerobic debromination of pbdes |
| topic | PBDEs mangrove sediment microbial community reductive debromination T-RFLP salinity |
| url | http://journal.frontiersin.org/article/10.3389/fmicb.2018.00952/full |
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