李婧婧^1,,
杨欢²,
高超²,
赵成¹
1. 中国科学院南京地理与湖泊研究所, 湖泊与环境国家重点实验室, 江苏 南京 210008
2. 中国地质大学(武汉)生物地质与环境地质国家重点实验室, 湖北 武汉 430074

基金项目: 国家自然科学基金项目（批准号：41472315和41502173）和中国地质大学（武汉）生物地质与环境地质国家重点实验室开放基金项目（批准号：GBL21604）共同资助


详细信息

作者简介: 李婧婧, 女, 33岁, 助理研究员, 第四纪地质学专业, E-mail:jjli@niglas.ac.cn

中图分类号: P593

收稿日期:2018-05-27
修回日期:2018-08-25
刊出日期:2018-11-30

Application of hydroxylated glycerol dialkyl glycerol tetraethers: A review

Li Jingjing^1,,
Yang Huan²,
Gao Chao²,
Zhao Cheng¹
1. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, Jiangsu
2. State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences(Wuhan), Wuhan 430074, Hubei


MSC: P593

--> Received Date: 27 May 2018
Revised Date: 25 August 2018
Publish Date: 30 November 2018


摘要
摘要:羟基甘油二烷基甘油四醚（Hydroxylated GDGTs，简称OH-GDGTs）脂类化合物广泛分布在全球不同海域以及湖泊环境，研究显示此类化合物的分布受控于温度，在高纬低温海域含量丰富，而在温度相对较高的低纬海域含量相对较低。前人研究表明，海洋表层沉积物中OH-GDGTs的分布与海水表层温度（Sea Surface Temperature，简称SST）之间有着明显的相关性，因此当其他生物标志化合物使用受限时，基于OH-GDGTs构建的指标成为一类较好的温度替代指标。基于此，文章主要介绍此类化合物的结构、生物来源，并阐述此类化合物在不同类型沉积载体（包括海洋以及湖泊）中的研究进展，为进一步了解此类化合物所携带的生物和环境信息提供依据。
关键词: 羟基甘油二烷基甘油四醚/
奇古菌/
海洋沉积物/
湖泊沉积物

Abstract:Hydroxylated GDGTs (OH-GDGTs) are a suite of GDGTs with up to two OH groups in one of their alkyl chains and are widespread in global marine sediments. The biological sources of OH-GDGTs are likely planktonic Thaumarchaeota, especially the cultivated representatives of Group 1.1a in marine environments. The OH-GDGTs were also found in an extremophile Euryarchaeota culture (Methanothermococcus thermolithotrophicus). Previous investigations based on global marine environments indicated that the relative abundance of OH-GDGTs in marine sediments increased with the increasing latitude and showed a significant correlation with sea surface temperature (SST), and the relative number of cyclopentane rings in OH-GDGTs increased with increasing SST in subpolar and polar regions. The occurrence of OH-GDGTs in ancient downcore sediments suggests potential for these compounds for paleoenviromental applications, by using an extended compilation from a global core top OH-GDGTs data set, the OH-GDGTs based proxies could be used as potential indicators of paleo sea surface temperature, especially when the application of other biomarkers is limited.
Although many studies have focused on OH-GDGTs in marine settings, only a few have examined the occurrence of OH-GDGTs in lacustrine environments. Further studies are necessary to explore the distribution pattern of OH-GDGTs in lake settings, the relationship between the distribution pattern of OH-GDGTs and temperature. Also the applicability of marine environments based OH-GDGTs calibrations should be measured in lacustrine environments.
In this paper, we introduce the structures, biological sources and the occurrence of OH-GDGTs in marine and lacustrine environments to further explore the biological and environmental implications of OH-GDGTs in environment samples.
Key words:OH-GDGTs/
Thaumarchaeota/
marine sediments/
lacustrine sediments



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