3-Hydroxy fatty acids as proxies for seawater temperature and pH in the eastern China marginal seas

doi:10.1016/j.chemgeo.2022.121258

	3-Hydroxy fatty acids as proxies for seawater temperature and pH in the eastern China marginal seas
	Pan, Fengmin 1,2,3,4; Yuan, Huamao1,2,3,4,6 ; Song, Jinming1,2,3,4,6 ; Yao, Qingzhen 5; Li, Xuegang 1,2,3,4; Duan, Liqin 1,2,3,4; Xing, Jianwei1,2,3,4
	2023-02-05
发表期刊	CHEMICAL GEOLOGY
ISSN	0009-2541
卷号	617 页码:12
通讯作者	Yuan, Huamao(yuanhuamao@qdio.ac.cn) ; Song, Jinming(jmsong@qdio.ac.cn)
摘要	3-Hydroxy fatty acids (3-OH-FAs) have recently been proposed as proxies for terrestrial, lacustrine and marine environment reconstruction. However, their application in the latter is not yet fully understood. Here we analyzed 3-OH-FAs in surface sediments from the eastern China marginal seas (ECMS), aiming to explore the application of 3-OH-FA-based proxies in marine temperature and pH reconstruction. Results showed that both the empirical mean annual air temperature (MAAT) proxies RAN15 and RAN17 (ratio of anteiso to normal isomers for C15 and C17 homologues, respectively), and the mean annual sea surface temperature (SST) proxy RAN13 were significantly correlated with SST (with RAN15 showing the strongest correlation and highest amplitude response), indicating the applicability of 3-OH-FA-based proxies developed in terrestrial and marine settings in the ECMS. The strongest correlation of RAN15 with SST is probably attributable to the relatively higher abun-dance and larger variation range of anteiso C15 homologues in the sediments. Moreover, the above proxies were also significantly correlated with mean annual bottom water temperature (BWT) with slightly stronger corre-lation than with SST, suggesting an important contribution of bottom layer to sedimentary 3-OH-FAs. In particular, the temperature proxies showed marked seasonal variation and a stronger correlation with BWT during warm seasons. A novel temperature proxy (RAI15, the ratio of anteiso to iso C15 isomers) provided strong correlations with BWT in summer and autumn, suggesting that RAI15 is a robust potential BWT proxy for warm seasons in the ECMS. Based on the current data, the sedimentary 3-OH FAs could be a mixture of lipids both produced from the surface and the bottom water layers, and which layer sea temperature the proxies better reflect need to be further explored although a slightly stronger correlation with BWT than SST was found in the present study. In addition, the empirical soil 3-OH-FA-based pH proxies were not suitable in this study, although the influence of pH on marine 3-OH-FAs was confirmed based on a locally developed calibration. Our findings contribute to the understanding of the potential use of bacterial 3-OH-FAs as environmental proxies in temperate marginal seas.
关键词	3-Hydroxy fatty acids Proxy Temperature pH Eastern China marginal seas
DOI	10.1016/j.chemgeo.2022.121258
收录类别	SCI
语种	英语
资助项目	Marine S&T Fund of Shandong Province for the Pilot National Laboratory for Marine Science and Technology (Qingdao)[2022QNLM040003-1] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23050501] ; Key Project of the Center for Ocean Mega -Science of the Chinese Academy of Sciences[COMS2019Q12] ; National Natural Science Foundation of China[41976037] ; National Natural Science Foundation of China[41906035] ; Shandong Provincial Natural Science Foundation[ZR2019BD068] ; Shandong Provincial Natural Science Foundation[ZR2020YQ28] ; Taishan Scholars Program
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000906564600001
出版者	ELSEVIER
WOS关键词	ISOPRENOID TETRAETHER LIPIDS ; CORE-TOP CALIBRATION ; MEMBRANE-LIPIDS ; TEX86 PALEOTHERMOMETER ; THERMAL ADAPTATION ; BACTERIAL ; SEDIMENTS ; DIVERSITY ; ARCHAEAL ; MARINE
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/183270
专题	海洋生态与环境科学重点实验室
通讯作者	Yuan, Huamao; Song, Jinming
作者单位	1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China 5.Ocean Univ China, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Key Lab Marine Chem Theory & Technol, Minist Educ, Qingdao 266100, Peoples R China 6.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, 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; 中国科学院海洋研究所
通讯作者单位	海洋生态与环境科学重点实验室; 中国科学院海洋研究所
推荐引用方式 GB/T 7714	Pan, Fengmin,Yuan, Huamao,Song, Jinming,et al. 3-Hydroxy fatty acids as proxies for seawater temperature and pH in the eastern China marginal seas[J]. CHEMICAL GEOLOGY,2023,617:12.
APA	Pan, Fengmin.,Yuan, Huamao.,Song, Jinming.,Yao, Qingzhen.,Li, Xuegang.,...&Xing, Jianwei.(2023).3-Hydroxy fatty acids as proxies for seawater temperature and pH in the eastern China marginal seas.CHEMICAL GEOLOGY,617,12.
MLA	Pan, Fengmin,et al."3-Hydroxy fatty acids as proxies for seawater temperature and pH in the eastern China marginal seas".CHEMICAL GEOLOGY 617(2023):12.