Redox indication potential of isoprenoid tetraether lipids in marine environments: Insights from the East China Sea

doi:10.1016/j.chemgeo.2024.122207

	Redox indication potential of isoprenoid tetraether lipids in marine environments: Insights from the East China Sea
	Duan, Liqin 1,2,3,4; Song, Jinming1,2,3,4 ; Yuan, Huamao 1,2,3,4; Li, Xuegang 1,2,3,4; Peng, Quancai4,5
	2024-09-05
发表期刊	CHEMICAL GEOLOGY
ISSN	0009-2541
卷号	662 页码:15
通讯作者	Duan, Liqin([email protected])
摘要	The response of marine ammonia-oxidizing archaea (AOA) to environmental stress is reflected in changes in their membrane lipid composition, particularly the unique isoprenoid glycerol dialkyl glycerol tetraethers (iGDGTs). However, the influence of dissolved oxygen (DO) on the composition of iGDGTs in the ocean remains unclear. This study aims to investigate the link between DO levels and the fractional abundances of iGDGTs in the East China Sea (ECS) to establish a redox proxy. Results suggested that the absolute abundances of iGDGTs were influenced by Thaumarchaeota biomass when DO concentrations exceeded 2 mg/L. Vertical distributions of iGDGTs through the water column suggested their transport from bottom waters to sediments. Increasing proportions of iGDGT-0 and the sum of iGDGT-1, iGDGT-2 and iGDGT-3 from suspended particulate matters to surface sediments indicated their preferential preservation. DO concentrations (2 -6 mg/L) in the water column showed a significant positive correlation with the relative abundance of crenarchaeol (cren%) but a negative correlation with iGDGT-0%, suggesting insufficient DO levels to promote AOA cyclization. However, bottom DO concentrations exhibited significant negative correlations with both cren% and iGDGT-0% in surface sediments, attributed to enhanced cyclization of iGDGTs and Euryarchaeota abundance within more reducing sediments, respectively. The consistent relationship between iGDGT-0% and DO in both water column and sediments enabled iGDGT-0% to be a potential redox proxy. Temporal variations in iGDGT-0% in the ECS in recent decades aligned well with in -situ DO monitoring data, further validating iGDGT-0% as a promising redox proxy.
关键词	Isoprenoid glycerol dialkyl glycerol tetraether (iGDGT) Dissolved oxygen (DO) Redox proxy Sediments Temporal changes
DOI	10.1016/j.chemgeo.2024.122207
收录类别	SCI
语种	英语
资助项目	Taishan Scholars Program[tsqn202211256]; National Key Research and Development Program of China[2023YFE0106200]; National Natural Science Foun-dation of China[41976037]; Shandong Provincial Natural Science Foundation[ZR2020YQ28]; Laoshan Laboratory Science and Technology Innovation Project[LSKJ202205003]
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:001263869400001
出版者	ELSEVIER
WOS关键词	DIALKYL GLYCEROL TETRAETHERS ; CRENARCHAEOTAL MEMBRANE-LIPIDS ; SUSPENDED PARTICULATE MATTER ; WATER-COLUMN ; ORGANIC-MATTER ; YANGTZE-RIVER ; PALEOTEMPERATURE PROXY ; SURFACE TEMPERATURE ; CHANGJIANG ESTUARY ; LAKE-SEDIMENTS
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/186297
专题	海洋生态与环境科学重点实验室
通讯作者	Duan, Liqin
作者单位	1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 2.Qingdao Marine Sci & Technol Ctr, Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Publ Technol Serv Ctr, Qingdao 266071, Peoples R China
第一作者单位	海洋生态与环境科学重点实验室
通讯作者单位	海洋生态与环境科学重点实验室
推荐引用方式 GB/T 7714	Duan, Liqin,Song, Jinming,Yuan, Huamao,et al. Redox indication potential of isoprenoid tetraether lipids in marine environments: Insights from the East China Sea[J]. CHEMICAL GEOLOGY,2024,662:15.
APA	Duan, Liqin,Song, Jinming,Yuan, Huamao,Li, Xuegang,&Peng, Quancai.(2024).Redox indication potential of isoprenoid tetraether lipids in marine environments: Insights from the East China Sea.CHEMICAL GEOLOGY,662,15.
MLA	Duan, Liqin,et al."Redox indication potential of isoprenoid tetraether lipids in marine environments: Insights from the East China Sea".CHEMICAL GEOLOGY 662(2024):15.