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Factors controlling the types of microbial consortia in cold-seep environments: A molecular and isotopic investigation of authigenic carbonates from the South China Sea
Guan, Hongxiang1,2; Sun, Yongge2,3; Zhu, Xiaowei1,2; Mao, Shengyi1,2; Feng, Dong4; Wu, Nengyou1,2; Chen, Duofu2
2013-09-16
Source PublicationCHEMICAL GEOLOGY
Volume354Pages:55-64
AbstractAuthigenic carbonates were recovered from several locations of the South China Sea continental slope at a 470 m to 770 m water depth. The sources of seeping fluids, the time involved in carbonate formation and the potential driving forces are increasingly understood, but little is known about the biogeochemical processes that occur during this type of carbonate precipitation. Here, a molecular and isotopic investigation of authigenic carbonates was conducted to determine the factors controlling the types of microbial consortia in cold-seep environments. The studied carbonates were one aragonitic crust and three high-Mg calcitic tubular concretions from specific sites. A significant input of biogenic methane to the carbon pool during the precipitation of the carbonates was suggested by the presence of C-13-depleted molecular fossils of methanotrophic archaea (with delta C-13 values as negative at -141.5%) and sulfate-reducing bacteria (with delta C-13 values as negative at -128.5%). The methane was primarily oxidized in an anaerobic process. The predominant consortia were ANME-2 assemblages in the aragonitic carbonate (sample TVG3-C2), whereas high-Mg calcitic carbonates (samples TVG14-C2 and TVG8-C5) were dominated by ANME-1 assemblages according to the specific biomarkers observed. Taking the favored environments for specific AOM consortia and crystallization conditions for aragonite and calcite together, the factors selecting for specific AOM communities appear to be constrained by their biogeochemical settings. Accordingly, higher alkalinity, abundant sulfate concentration and being closer to the water-sediment interface conditions favor the precipitation of aragonite over high-Mg calcite. (C) 2013 Elsevier B.V. All rights reserved.
SubtypeArticle
KeywordMethane Seeps Lipid Biomarkers Seep Carbonates Dominated Consortia The South China Sea
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.chemgeo.2013.06.016
WOS Subject ExtendedGeochemistry & Geophysics
WOS KeywordANAEROBIC METHANE OXIDATION ; NORTHERN CONTINENTAL-SLOPE ; EASTERN MEDITERRANEAN SEA ; 16S RIBOSOMAL-RNA ; LIPID BIOMARKER ; BLACK-SEA ; MARINE-SEDIMENTS ; MUD VOLCANOS ; FATTY-ACIDS ; METHANOTROPHIC CONSORTIA
Indexed BySCI
Language英语
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000325751200006
Citation statistics
Cited Times:20[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10030
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Marginal Sea Geol, Guangzhou 510640, Guangdong, Peoples R China
3.Zhejiang Univ, Dept Earth Sci, Hangzhou 310027, Zhejiang, Peoples R China
4.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Guan, Hongxiang,Sun, Yongge,Zhu, Xiaowei,et al. Factors controlling the types of microbial consortia in cold-seep environments: A molecular and isotopic investigation of authigenic carbonates from the South China Sea[J]. CHEMICAL GEOLOGY,2013,354:55-64.
APA Guan, Hongxiang.,Sun, Yongge.,Zhu, Xiaowei.,Mao, Shengyi.,Feng, Dong.,...&Chen, Duofu.(2013).Factors controlling the types of microbial consortia in cold-seep environments: A molecular and isotopic investigation of authigenic carbonates from the South China Sea.CHEMICAL GEOLOGY,354,55-64.
MLA Guan, Hongxiang,et al."Factors controlling the types of microbial consortia in cold-seep environments: A molecular and isotopic investigation of authigenic carbonates from the South China Sea".CHEMICAL GEOLOGY 354(2013):55-64.
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