n-Alkyl lipid concentrations and distributions in aquatic plants and their individual delta D variations

doi:10.1007/s11430-019-9370-8

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	n-Alkyl lipid concentrations and distributions in aquatic plants and their individual delta D variations
	Liu, Hu 1,2; Liu, Zhonghui 3; Zhao, Cheng 4; Liu, Weiguo 1,2
通讯作者	Liu, Weiguo(liuwg@loess.llqg.ac.cn)
	2019-09-01
发表期刊	SCIENCE CHINA-EARTH SCIENCES
ISSN	1674-7313
卷号	62 期号:9 页码:1441-1452
摘要	Aquatic plants are major input sources of autochthonous organic matter in lake sediments, but investigations on fatty acid (FA) and n-alkane distributions in aquatic plants are currently limited, greatly hindering the applications of their isotope geochemistry in lacustrine environments. Here, the reported n-alkyl lipid distributions of aquatic plants in globally studied lakes, together with newly obtained aquatic plant n-alkyl lipid data in Chinese lakes (Yunnan and Inner Mongolia), are used to understand their distribution characteristics. The results show that aquatic plants have predominantly mid-chain lipids (C-23-C(25)n-alkanes and C-22-C-24 FAs), differing from that of terrestrial plants (dominant by long-chain lipids), but the long-chain n-alkanes (e.g., C-27 and C-29) and long-chain FAs (e.g., C-26 and C-28) also show high abundances in most samples. Submerged plants have high concentrations of long-chain n-alkanes (avg. 47 mu g g(-1)) and long-chain FAs (avg. 170 mu g g(-1)), close to those in terrestrial plants, indicating that submerged plants may make large contributions of long-chain n-alkyl lipids to lake sediments, while the contributions of long-chain n-alkyl lipids derived from algae to lake sediments may be small because of their low concentrations (avg. 2 mu g g(-1) for n-alkanes and 9 mu g g(-1) for FAs). We find that lipid molecular proxies (including ACL(14-32) and ATR(14-18)) can be reliably used to distinguish the FAs sourced from algae and other plants, and Paq' values can be utilized to distinguish the n-alkane sources between submerged plants and terrestrial plants. Aquatic plants do not have significant delta D differences among different chain-length n-alkanes and FAs for each sample, suggesting that the offset between delta D values of different chain-length n-alkyl lipids in lake sediments can help determine sedimentary lipid input sources and infer paleohydrological changes.
关键词	n-Alkanes Fatty acids Hydrogen isotopes Algae Submerged plants
DOI	10.1007/s11430-019-9370-8
关键词[WOS]	HYDROGEN ISOTOPE RATIOS ; TERRESTRIAL PLANTS ; SUBMERGED PLANTS ; ALKANE DISTRIBUTIONS ; TIBETAN PLATEAU ; D VALUES ; LAKE ; BIOMARKERS ; ALGAE ; PRECIPITATION
收录类别	SCI ; SCI
语种	英语
资助项目	National Natural Science Foundation of China[41573005] ; National Basic Research Programme of China[2013CB955901] ; Key Program of the Chinese Academy of Sciences[QYZDY-SSW-DQC001] ; State Key Laboratory of Loess and Quaternary Geology[SKLLQG1632]
WOS研究方向	Geology
项目资助者	National Natural Science Foundation of China ; National Basic Research Programme of China ; Key Program of the Chinese Academy of Sciences ; State Key Laboratory of Loess and Quaternary Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000484999000009
出版者	SCIENCE PRESS
引用统计	被引频次：6[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/361006/13537
专题	加速器质谱中心
通讯作者	Liu, Weiguo
作者单位	1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Hong Kong, Dept Earth Sci, Hong Kong 999077, Peoples R China 4.Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Liu, Hu,Liu, Zhonghui,Zhao, Cheng,et al. n-Alkyl lipid concentrations and distributions in aquatic plants and their individual delta D variations[J]. SCIENCE CHINA-EARTH SCIENCES,2019,62(9):1441-1452.
APA	Liu, Hu,Liu, Zhonghui,Zhao, Cheng,&Liu, Weiguo.(2019).n-Alkyl lipid concentrations and distributions in aquatic plants and their individual delta D variations.SCIENCE CHINA-EARTH SCIENCES,62(9),1441-1452.
MLA	Liu, Hu,et al."n-Alkyl lipid concentrations and distributions in aquatic plants and their individual delta D variations".SCIENCE CHINA-EARTH SCIENCES 62.9(2019):1441-1452.