IDSSE OpenIR  > 深海科学研究部  > 深海地质与地球化学研究室
New insight into the biogeochemical cycling of methane, S and Fe above the Sulfate-Methane Transition Zone in methane hydrate-bearing sediments: A case study in the Dongsha area, South China Sea
Li, Jiwei1; Li, Ling1,2; Bai, Shijie1; Ta, Kaiwen1; Xu, Hengchao1; Chen, Shun1; Pan, Jie3; Li, Meng3; Du, Mengran1; Peng, Xiaotong1
2019-03-01
Source PublicationDEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
ISSN0967-0637
Volume145Issue:1Pages:97-108
Abstract

Microbially-mediated methane, S and Fe cycling in the sediments can largely reduce the flux of methane from the ocean to the atmosphere. Compared to a large number of records regarding these processes in the sulfate-methane transition zone (SMTZ), detailed information of these processes in the zone above the SMTZ is still required. In this study, a short sediment core DS16 (330 cm) collected from the methane hydrate-bearing Dongsha area, Northern of the South China Sea, was examined by geochemical and microbial methods. Pore water dissolved inorganic carbon (DIC) had an increasing trend with the increasing depth of the sediment, while the value of delta C-13-DIC showed a decreasing pattern. The high concentrations of DIC (up to 32.88 mM) and relatively negative delta C-13-DIC (down to -30.07%0) indicated the occurrence of anaerobic oxidation of methane (ACM) to some extant above the SMTZ in this region. The variation of concentration profiles of H2S (3.69-12.71 mmol/L) and Fe(III) indicated active S and Fe redox reactions occurred in this zone. Notably, both of the decreasing trends of sulfate and Fe(M) correlated well with those of delta C-13-DIC, indicating AOM and organic materials coupled with both sulfate and Fe(III) reduction. Moreover, high-throughput sequencing data showed that a number of archaea (ANME-1) and bacteria (Sulfurovurn and Shewanella), which are potential methane-, S-and Fe-metabolic related microorganisms, were detected in these sediments. In addition, the functional genes related to sulfate reduction, sulfur oxidation, and Fe uptake were also detected based on metagenomics analysis. Among them, with the depth increase and Fe(III) concentration decrease, the gene related to Fe3+ uptake mechanism decreased, while the gene related to siderophore uptake mechanism remained constant or even slightly increased. Thus, we propose that bacteria acquired Fe(III) via Fe(III) uptake proteins and siderophore uptake proteins in the Fe-deficient environments for reduction, which then might support the occurrence of Fe-ACM. By integrating these data, we suggest the occurrence of active biogeochemical CH4-S-Fe cycling in the zone above the SMTZ under high methane flux.

KeywordAnaerobic Oxidation Of Methane Biogeochemical Cycle Sulfate-methane Transition Zone Fe(Iii) Reduction Methane Hydrate-bearing Sediments South China Sea
DOI10.1016/j.dsr.2019.01.011
Indexed BySCI
Funding OrganizationNational Key Basic Research Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
Language英语
Funding ProjectNational Key Basic Research Program of China[2015CB755905] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB06020000] ; National Natural Science Foundation of China[41576038] ; National Natural Science Foundation of China[41506139] ; National Natural Science Foundation of China[41876050] ; National Natural Science Foundation of China[41506097] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
WOS KeywordSulfur-oxidizing Chemolithoautotroph ; Marine Subsurface Sediments ; Gas Hydrate ; Anaerobic Oxidation ; Sp-nov. ; Methanotrophic Archaea ; Microbial Community ; Continental-margin ; Fe(Iii) Reduction ; Seep Carbonates
WOS Research AreaOceanography
WOS SubjectOceanography
WOS IDWOS:000465055400007
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.idsse.ac.cn/handle/183446/6741
Collection深海科学研究部_深海地质与地球化学研究室
深海科学研究部_深海生物学研究室_海洋病毒与分子生物学研究组
Corresponding AuthorPeng, Xiaotong
Affiliation1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
2.Univ Chinese Acad Sci, Chinese Acad Sci, Beijing 100049, Peoples R China
3.Shenzhen Univ, Inst Adv Study, Shenzhen, Guangdong, Peoples R China
First Author AffilicationInstitute of Deep-sea Science and Engineering,CAS
Corresponding Author AffilicationInstitute of Deep-sea Science and Engineering,CAS
Recommended Citation
GB/T 7714
Li, Jiwei,Li, Ling,Bai, Shijie,et al. New insight into the biogeochemical cycling of methane, S and Fe above the Sulfate-Methane Transition Zone in methane hydrate-bearing sediments: A case study in the Dongsha area, South China Sea[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2019,145(1):97-108.
APA Li, Jiwei.,Li, Ling.,Bai, Shijie.,Ta, Kaiwen.,Xu, Hengchao.,...&Peng, Xiaotong.(2019).New insight into the biogeochemical cycling of methane, S and Fe above the Sulfate-Methane Transition Zone in methane hydrate-bearing sediments: A case study in the Dongsha area, South China Sea.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,145(1),97-108.
MLA Li, Jiwei,et al."New insight into the biogeochemical cycling of methane, S and Fe above the Sulfate-Methane Transition Zone in methane hydrate-bearing sediments: A case study in the Dongsha area, South China Sea".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 145.1(2019):97-108.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Li, Jiwei]'s Articles
[Li, Ling]'s Articles
[Bai, Shijie]'s Articles
Baidu academic
Similar articles in Baidu academic
[Li, Jiwei]'s Articles
[Li, Ling]'s Articles
[Bai, Shijie]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Li, Jiwei]'s Articles
[Li, Ling]'s Articles
[Bai, Shijie]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.