Correlation between the ratio of 5-methyl hexamethylated to pentamethylated branched GDGTs (HP5) and water depth reflects redox variations in stratified lakes

doi:10.1016/j.orggeochem.2020.104076

IEECAS OpenIR > 古环境研究室

	Correlation between the ratio of 5-methyl hexamethylated to pentamethylated branched GDGTs (HP5) and water depth reflects redox variations in stratified lakes
	Yao, Yuan 1,2,3; Zhao, Jiaju 2; Vachula, Richard S.3; Werne, Josef P.4; Wu, Jing 5; Song, Xueshu 6; Huang, Yongsong 2,3
通讯作者	Huang, Yongsong(yongsong_huang@brown.edu)
	2020-09-01
发表期刊	ORGANIC GEOCHEMISTRY
ISSN	0146-6380
卷号	147 页码:10
摘要	Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are potentially valuable biomarkers for paleoclimatic and paleoenvironmental studies. However, multiple factors controlling their variations in lake sediments hamper the widespread application of brGDGT-based proxies. Here we investigate brGDGTs in water column suspended particulate matter (SPM) and surface sediments in a series of lakes with a wide range of depths from three main volcanic fields of northeastern China. The brGDGT distribution patterns from SPM and surface sediments of these lakes differ greatly from those of surrounding soils, indicating a predominant aquatic origin for brGDGTs. We find that the ratio of 5-methyl hexamethylated and pentamethylated brGDGTs with no cyclopentane rings (IIIa/(IIa + IIIa); designated as HP5) is strongly correlated with water depth. Re-examination of published brGDGT data from SPM samples in redox-stratified Lake Lugano reveals similar relationships, whereas such correlations are much weaker in Lake Superior which does not have an anoxic hypolimnion. Importantly, we find that there is strong correlation between HP5 and dissolved oxygen in water column of the redox-stratified lakes, suggesting that the observed apparent HP5-water depth correlation may be primarily attributed to depth-progressive shifts in the brGDGT-producing bacterial communities with different redox requirements (aerobic, facultative anaerobic, and anaerobic bacteria). Notably, brGDGT methylation indices (MBT'(5ME) and MBT'(6ME)) of surface sediments display poor correlations with air temperatures in our study lakes, calling for caution in applying MBT'(5ME) and MBT'(6ME) as temperature proxies in these lakes. (C) 2020 Elsevier Ltd. All rights reserved.
关键词	brGDGTs HP5 5-methyl IIIa Lake redox variations Stratified lakes
DOI	10.1016/j.orggeochem.2020.104076
关键词[WOS]	DIALKYL GLYCEROL TETRAETHERS ; CBT PALEOTEMPERATURE PROXY ; ISO-DIABOLIC ACID ; MEMBRANE-LIPIDS ; ENVIRONMENTAL CONTROLS ; SEASONAL VARIABILITY ; VOLCANIC FIELD ; MAAR LAKE ; NE CHINA ; TEMPERATURE
收录类别	SCI ; SCI
语种	英语
资助项目	National Natural Science Foundation of China[41573113] ; National Natural Science Foundation of China[41702187] ; National Natural Science Foundation of China[41602193] ; National Natural Science Foundation of China[41572353] ; State Key Laboratory of Loess and Quaternary Geology in the Institute of Earth Environment, Chinese Academy of Sciences[SKLLQGPY1704] ; U.S. National Science Foundation[EAR-1122749] ; U.S. National Science Foundation[PLR-1503846] ; U.S. National Science Foundation[EAR-1502455] ; U.S. National Science Foundation[EAR-1762431]
WOS研究方向	Geochemistry & Geophysics
项目资助者	National Natural Science Foundation of China ; State Key Laboratory of Loess and Quaternary Geology in the Institute of Earth Environment, Chinese Academy of Sciences ; U.S. National Science Foundation
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000554921700003
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：27[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/15121
专题	古环境研究室
通讯作者	Huang, Yongsong
作者单位	1.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710054, Peoples R China 2.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710061, Peoples R China 3.Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA 4.Univ Pittsburgh, Dept Geol & Environm Sci, Pittsburgh, PA 15260 USA 5.Chinese Acad Sci, Key Lab Cenozo Geol & Environm, Inst Geol & Geophys, Beijing 100029, Peoples R China 6.Longwan Natl Nat Reserve Adm, Jilin 135001, Jilin, Peoples R China
推荐引用方式 GB/T 7714	Yao, Yuan,Zhao, Jiaju,Vachula, Richard S.,et al. Correlation between the ratio of 5-methyl hexamethylated to pentamethylated branched GDGTs (HP5) and water depth reflects redox variations in stratified lakes[J]. ORGANIC GEOCHEMISTRY,2020,147:10.
APA	Yao, Yuan.,Zhao, Jiaju.,Vachula, Richard S..,Werne, Josef P..,Wu, Jing.,...&Huang, Yongsong.(2020).Correlation between the ratio of 5-methyl hexamethylated to pentamethylated branched GDGTs (HP5) and water depth reflects redox variations in stratified lakes.ORGANIC GEOCHEMISTRY,147,10.
MLA	Yao, Yuan,et al."Correlation between the ratio of 5-methyl hexamethylated to pentamethylated branched GDGTs (HP5) and water depth reflects redox variations in stratified lakes".ORGANIC GEOCHEMISTRY 147(2020):10.