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Distributions and Sources of Glycerol Dialkyl Glycerol Tetraethers in Sediment Cores From the Mariana Subduction Zone
Ta, Kaiwen1,2,3; Peng, Xiaotong1; Xu, Hengchao1,2,3; Du, Mengran1; Chen, Shun1; Li, Jiwei1; Zhang, Chuanlun4
2019-04-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN2169-8953
Volume124Issue:4Pages:857-869
Abstract

Glycerol dialkyl glycerol tetraethers (GDGTs) are ubiquitously found in marine sediments. However, their presence, distributions, and sources in the subduction zone are not fully understood. We investigated isoprenoidal GDGTs (isoGDGTs) and branched GDGTs (brGDGTs) in two sediment cores from the southern and northern subduction plates of Mariana Trench, respectively. IsoGDGTs and brGDGTs exhibited covariation in most sediment samples, and total GDGT concentrations reached a maximum at the subsurface sediment depth similar to 10 cm. Concentrations of isoGDGTs and brGDGTs were clearly elevated at depths of similar to 10 and similar to 45 cm. These indicated that microbial activities potentially influenced the production of the specific membrane lipids of archaea and bacteria. We found that the branched and isoprenoid tetraether index and R-b/i values increased with depth profiles of the Mariana subduction zone, suggesting that deeper sediments likely hosted more brGDGT-producing bacteria than crenarchaeol-producing archaea. The extremely high abundance of cyclopentyl rings in brGDGTs was determined in subsurface sediments. We further proposed that most of the brGDGTs in sediments were produced in situ in the Mariana subduction zone. This study highlights that the extremophilic microbial communities of the Mariana subduction zone may represent a significant component of the global carbon cycle.

DOI10.1029/2018JG004748
Indexed BySCI
Funding OrganizationNational key R&D Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China
Language英语
Funding ProjectNational key R&D Program of China[2018YFC0309802] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB06020000] ; National Natural Science Foundation of China[41673073] ; National Natural Science Foundation of China[41506097]
WOS KeywordMembrane-lipids ; Intact Polar ; Particulate Matter ; Organic-matter ; Deep Subsurface ; Hadal Trenches ; Marine ; Carbon ; Tex86 ; Serpentinites
WOS Research AreaEnvironmental Sciences & Ecology ; Geology
WOS SubjectEnvironmental Sciences ; Geosciences, Multidisciplinary
WOS IDWOS:000469076200009
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.idsse.ac.cn/handle/183446/6844
Collection深海科学研究部_深海地质与地球化学研究室
所领导
Corresponding AuthorPeng, Xiaotong
Affiliation1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Deep Sea Sci Div, Sanya, Peoples R China
2.Tongji Univ, Sch Ocean & Earth Sci, Shanghai, Peoples R China
3.Tongji Univ, State Key Lab Marine Geol, Shanghai, Peoples R China
4.South Univ Sci & Technol China, Dept Ocean Sci & Engn, Shenzhen, Peoples R China
Recommended Citation
GB/T 7714
Ta, Kaiwen,Peng, Xiaotong,Xu, Hengchao,et al. Distributions and Sources of Glycerol Dialkyl Glycerol Tetraethers in Sediment Cores From the Mariana Subduction Zone[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2019,124(4):857-869.
APA Ta, Kaiwen.,Peng, Xiaotong.,Xu, Hengchao.,Du, Mengran.,Chen, Shun.,...&Zhang, Chuanlun.(2019).Distributions and Sources of Glycerol Dialkyl Glycerol Tetraethers in Sediment Cores From the Mariana Subduction Zone.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,124(4),857-869.
MLA Ta, Kaiwen,et al."Distributions and Sources of Glycerol Dialkyl Glycerol Tetraethers in Sediment Cores From the Mariana Subduction Zone".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 124.4(2019):857-869.
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