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

文献类型：期刊论文

作者Yao, Yuan2,4,5; Zhao, Jiaju4; Vachula, Richard S.2; Werne, Josef P.1; Wu, Jing6; Song, Xueshu3; Huang, Yongsong2,4
刊名ORGANIC GEOCHEMISTRY
出版日期2020-09-01
卷号147页码:10
关键词brGDGTs HP5 5-methyl IIIa Lake redox variations Stratified lakes
ISSN号0146-6380
DOI10.1016/j.orggeochem.2020.104076
英文摘要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.
WOS关键词DIALKYL GLYCEROL TETRAETHERS ; CBT PALEOTEMPERATURE PROXY ; ISO-DIABOLIC ACID ; MEMBRANE-LIPIDS ; ENVIRONMENTAL CONTROLS ; SEASONAL VARIABILITY ; VOLCANIC FIELD ; MAAR LAKE ; NE CHINA ; TEMPERATURE
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
语种英语
WOS记录号WOS:000554921700003
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Loess and Quaternary Geology in the Institute of Earth Environment, Chinese Academy of Sciences ; State Key Laboratory of Loess and Quaternary Geology in the Institute of Earth Environment, Chinese Academy of Sciences ; U.S. National Science Foundation ; U.S. National Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Loess and Quaternary Geology in the Institute of Earth Environment, Chinese Academy of Sciences ; State Key Laboratory of Loess and Quaternary Geology in the Institute of Earth Environment, Chinese Academy of Sciences ; U.S. National Science Foundation ; U.S. National Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Loess and Quaternary Geology in the Institute of Earth Environment, Chinese Academy of Sciences ; State Key Laboratory of Loess and Quaternary Geology in the Institute of Earth Environment, Chinese Academy of Sciences ; U.S. National Science Foundation ; U.S. National Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Loess and Quaternary Geology in the Institute of Earth Environment, Chinese Academy of Sciences ; State Key Laboratory of Loess and Quaternary Geology in the Institute of Earth Environment, Chinese Academy of Sciences ; U.S. National Science Foundation ; U.S. National Science Foundation
源URL[http://ir.iggcas.ac.cn/handle/132A11/97592]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Huang, Yongsong
作者单位1.Univ Pittsburgh, Dept Geol & Environm Sci, Pittsburgh, PA 15260 USA
2.Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA
3.Longwan Natl Nat Reserve Adm, Jilin 135001, Jilin, Peoples R China
4.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710061, Peoples R China
5.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710054, Peoples R China
6.Chinese Acad Sci, Key Lab Cenozo Geol & Environm, Inst Geol & Geophys, Beijing 100029, 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.

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来源：地质与地球物理研究所

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