Factors controlling the types of microbial consortia in cold-seep environments: A molecular and isotopic investigation of authigenic carbonates from the South China Sea

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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, Hongxiang ; Zhu, Xiaowei ; Mao, Shengyi ; Wu, Nengyou] Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China ; [Guan, Hongxiang ; Sun, Yongge ; Zhu, Xiaowei ; Mao, Shengyi ; Wu, Nengyou ; Chen, Duofu] Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Marginal Sea Geol, Guangzhou 510640, Guangdong, Peoples R China ; [Sun, Yongge] Zhejiang Univ, Dept Earth Sci, Hangzhou 310027, Zhejiang, Peoples R China ; [Feng, Dong] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China
刊名	CHEMICAL GEOLOGY
	2013
卷号	354 页码:55-64
关键词	Methane seeps Lipid biomarkers Seep carbonates Dominated consortia The South China Sea
ISSN号	0009-2541
通讯作者	guanhx@ms.giec.ac.cn ; wuny@ms.giec.ac.cn
中文摘要	Authigenic 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.
学科主题	Geochemistry & Geophysics
资助信息	We thank Dr. D. Birgel (University of Vienna) for lipid biomarkers identification. Drs. Y. Zhang and L. Xie (both GIG, CAS) are acknowledged for technical assistance. We thank the R/V SONNE 177 crew members for their professional work to meet our scientific goal during the cruise. The cruise was sponsored by IFM-GEOMAR and the China Geological Survey. This study was partially supported by the NSF of China (41103043 and 91028012), 973 Program (2009CB219506), the Knowledge Innovation Program of CAS (kzcx2-YW-GJ03), the Scientific and Technology Program of Guangdong Province (2011A080403021), and the NSF of Zhejiang Province (No. R5080124). Comments provided by the Editor and two anonymous referees are gratefully acknowledged.
原文出处	ELSEVIER SCIENCE BV
语种	英语
WOS记录号	WOS:000325751200006
公开日期	2015-01-22
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/11115]
专题	南海海洋研究所_中科院边缘海地质重点实验室
推荐引用方式 GB/T 7714	[Guan, Hongxiang,Zhu, Xiaowei,Mao, Shengyi,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.,Zhu, Xiaowei.,Mao, Shengyi.,Wu, Nengyou] Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China.,[Guan, Hongxiang.,...&[Feng, Dong] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China.(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.