Lipid biomarker patterns reflect seepage activity and variable geochemical processes in sediments from the Haima cold seeps, South China Sea

doi:10.1016/j.palaeo.2021.110742

GIEC OpenIR

	Lipid biomarker patterns reflect seepage activity and variable geochemical processes in sediments from the Haima cold seeps, South China Sea
	Guan, Hongxiang1,2,3 ; Xu, Lanfang 4,6; Liu, Lei 1,2; Li, Sanzhong 1,2,3; Feng, Junxi 5; Tao, Jun 5; Kuang, Zenggui 5; Liang, Jinqiang 5; Wu, Nengyou3
	2022-01-15
发表期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
卷号	586 页码:11
通讯作者	Guan, Hongxiang(guanhongxiang@ouc.edu.cn)
摘要	The anaerobic oxidation of methane (AOM), aerobic methane oxidation and the oxidation of non-methane hy-drocarbons have been demonstrated to occur in seepage ecosystems, but when they occur during seepage evolutionary is lack of constraints. Here, lipid biomarker patterns combined with total organic carbon (TOC), delta C-13(org), delta C-13(TIC) and delta O-18(TIC) of a sediment core (similar to 3 m long) from the active Haima cold seep were analyzed. The observed lipid inventories reflected the prevailing of anaerobic methane oxidizing archaea (ANME)/Desulfo-sarcina/Desulfococcus (DSS) and ANME-2/DSS dominated over the whole sediments. Seepage fluids originated from local gas hydrate dissociation as indicated by the pronounced delta C-13(TIC) and delta O-18(TIC) values, while a mixture of microbial and thermogenic methane (-65 parts per thousand to-55 parts per thousand) was corroborated by back-calculation based on the predominant consortia and delta 13C values of ANME-specific biomarkers. AOM occurred over the whole sediments and was strengthened between depths 40 cm and 120 cm as revealed by the extremely low delta(13)(CTIC), delta(13)(Corg) values, and abundant lipid biomarkers of ANME such as crocetane, 2,6,10,15,19-pentamethylicosane (PMI), archaeol and sn(2)-OH-archaeol with strong C-13 depletions (delta C-13 values as low as-118 parts per thousand). For sediment below the depth of 120 cm, molecular fossils of aerobic methanotrophs 4 alpha-methylcholesta-2,8(14),24-triene and C-34-3 beta-methyl tetracyclic-ketone occurred and yielded their delta C-13 values of-64 parts per thousand to-61 parts per thousand, indicating the prevailing of oxic condition and aerobic methane oxidation. Compared to the sediment between 40 cm and 120 cm, the abundant iso-/anteiso-C-15:0 (i-/ai-C-15:0) fatty acids with relatively enriched delta C-13 values in the bottom sediment were better explained by contribution of sulfate-reducing bacteria (SRB)-driven oxidation of non-methane hy-drocarbons. The distinct biomarker patterns and the respective geochemical processes at various sediment depths revealed the microbial community succession sequence in seepage evolutionary, since the different growth rates may have led to a successive colonization of aerobic methanotrophs, SRB, and ANME in an emerging cold seep ecosystem.
关键词	Lipid biomarkers Anaerobic methanotrophic archaea Aerobic methanotrophs Non-methane hydrocarbons South China Sea
DOI	10.1016/j.palaeo.2021.110742
关键词[WOS]	SULFATE-REDUCING BACTERIA ; CARBON ISOTOPIC FRACTIONATION ; CHAPOPOTE ASPHALT VOLCANO ; METHANE-OXIDIZING ARCHAEA ; ANAEROBIC OXIDATION ; METHANOTROPHIC BACTERIA ; AUTHIGENIC CARBONATES ; FORMATION ENVIRONMENTS ; REDOX CONDITIONS ; GULF
收录类别	SCI
语种	英语
资助项目	NSF of China[91958105] ; National Key R&D Program of China[2018YFC0310005]
WOS研究方向	Physical Geography ; Geology ; Paleontology
项目资助者	NSF of China ; National Key R&D Program of China
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000737216700003
出版者	ELSEVIER
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/35624
专题	中国科学院广州能源研究所
通讯作者	Guan, Hongxiang
作者单位	1.Ocean Univ China, MOE, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Key Lab Submarine Geosci & Prospecting Tech, Qingdao 266100, Peoples R China 2.Ocean Univ China, Coll Marine Geosci, Qingdao 266100, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266061, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 5.Guangzhou Marine Geol Survey, MLR Key Lab Marine Mineral Resources, Guangzhou 510075, Peoples R China 6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Guan, Hongxiang,Xu, Lanfang,Liu, Lei,et al. Lipid biomarker patterns reflect seepage activity and variable geochemical processes in sediments from the Haima cold seeps, South China Sea[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2022,586:11.
APA	Guan, Hongxiang.,Xu, Lanfang.,Liu, Lei.,Li, Sanzhong.,Feng, Junxi.,...&Wu, Nengyou.(2022).Lipid biomarker patterns reflect seepage activity and variable geochemical processes in sediments from the Haima cold seeps, South China Sea.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,586,11.
MLA	Guan, Hongxiang,et al."Lipid biomarker patterns reflect seepage activity and variable geochemical processes in sediments from the Haima cold seeps, South China Sea".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 586(2022):11.