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Origin and preservation of archaeal intact polar tetraether lipids in deeply buried sediments from the South China Sea

文献类型：期刊论文

作者Wu, Weiyan2; Xu, Yang2; Hou, Suning3; Dong, Liang4; Liu, Haodong1; Wang, Huanye5; Liu, Weiguo5; Zhang, Chuanlun1
刊名DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
出版日期2019-10-01
卷号152页码:8
关键词Archaeal lipids GDGTs TEX86 Deep biosphere South China Sea
ISSN号0967-0637
DOI10.1016/j.dsr.2019.103107
通讯作者Zhang, Chuanlun(zhangcl@sustech.edu.cn)
英文摘要Intact polar lipids-glycerol dibiphytanyl glycerol tetraethers (IPL-GDGTs) are assumed to be degraded to core lipids (CL) upon cell death, which thus can serve as markers for live archaea in marine deep biosphere. However, the degradation models of sedimentary IPL-GDGTs suggested that they are mainly fossil compounds and can be preserved over geological timescales. Here we investigated the CL- and IPL-GDGTs from deeply buried sediments (0.1-485 mbsf, similar to 7.3 Ma) in the South China Sea (SCS). The depth profiles of IPL-GDGT concentrations paralleled those of CL-GDGTs. The sea surface temperatures (SST) derived from CL- and IPL-TEX 86 ranged 23.1-28.8 degrees C and 22-33.3 degrees C, respectively. They are close to the SST in the SCS, suggesting that CL- and IPL-GDGTs mostly originate from pelagic archaea. The composition and distribution of the IPL-GDGTs differed among the polar headgroups. Hexose-phosphohexose (HPH)-GDGTs were dominated by GDGT-0, monohexose (1G)-GDGTs were mainly composed of GDGT-0 and crenarchaeol, and dihexose (2G)-GDGTs consist primarily of GDGT-2 and crenarchaeol isomer. The compositions of HPH-, 1G- and 2G-GDGTs are similar to those in previously studied water column samples, supporting that sedimentary IPL-GDGTs predominantly derive from the water column. HPH-GDGT abundances fast declined to be undetectable at similar to 31 mbsf (similar to 0.6 Ma) while 1G- and 2G-GDGTs dominated the deeply buried sediments, indicating that GDGTs with glycosidic headgroups are better preserved versus GDGTs with phosphorous headgroups over geological timescales. Our results demonstrate that IPL-GDGTs, especially glycosidic GDGTs, are not suitable as biomarkers for live archaea in the deep biosphere.
WOS关键词OXYGEN MINIMUM ZONE ; MEMBRANE-LIPIDS ; WATER COLUMN ; NITROSOPUMILUS-MARITIMUS ; CORE ; DEGRADATION ; TURNOVER ; GROWTH ; TEX86 ; FOSSILIZATION
资助项目State Key R&D Project of China[2018YFA0605800] ; National Natural Science Foundation of China[91851210] ; National Natural Science Foundation of China[41530105] ; National Natural Science Foundation of China[41673073] ; Key Project of Natural Science Foundation of Guangdong Province, China[20188030311016] ; Shenzhen Key Laboratory of Marine Archaea Geo-Omics, Southern University of Science and Technology, China[ZDSYS201802081843490] ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, China[MGQNLMTD201810]
WOS研究方向Oceanography
语种英语
WOS记录号WOS:000497251500007
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构State Key R&D Project of China ; National Natural Science Foundation of China ; Key Project of Natural Science Foundation of Guangdong Province, China ; Shenzhen Key Laboratory of Marine Archaea Geo-Omics, Southern University of Science and Technology, China ; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, China
源URL[http://ir.ieecas.cn/handle/361006/12975]  
专题地球环境研究所_加速器质谱中心
通讯作者Zhang, Chuanlun
作者单位1.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen Key Lab Marine Archaea Geoom, Shenzhen 518055, Peoples R China
2.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China
3.Univ Utrecht, NL-3584CD Utrecht, Netherlands
4.Shanghai Jiao Tong Univ, Sch Life Sci & Biotechnol, State Key Lab Microbial Metab, Shanghai 200240, Peoples R China
5.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Shaanxi, Peoples R China
推荐引用方式
GB/T 7714		 Wu, Weiyan,Xu, Yang,Hou, Suning,et al. Origin and preservation of archaeal intact polar tetraether lipids in deeply buried sediments from the South China Sea[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2019,152:8.
APA Wu, Weiyan.,Xu, Yang.,Hou, Suning.,Dong, Liang.,Liu, Haodong.,...&Zhang, Chuanlun.(2019).Origin and preservation of archaeal intact polar tetraether lipids in deeply buried sediments from the South China Sea.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,152,8.
MLA Wu, Weiyan,et al."Origin and preservation of archaeal intact polar tetraether lipids in deeply buried sediments from the South China Sea".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 152(2019):8.

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来源：地球环境研究所

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