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

文献类型：期刊论文

作者Liu, Hu2,4; Liu, Zhonghui1; Zhao, Cheng3; Liu, Weiguo2,4
刊名SCIENCE CHINA-EARTH SCIENCES
出版日期2019-09-01
卷号62期号:9页码:1441-1452
关键词n-Alkanes Fatty acids Hydrogen isotopes Algae Submerged plants
ISSN号1674-7313
DOI10.1007/s11430-019-9370-8
通讯作者Liu, Weiguo(liuwg@loess.llqg.ac.cn)
英文摘要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.
WOS关键词HYDROGEN ISOTOPE RATIOS ; TERRESTRIAL PLANTS ; SUBMERGED PLANTS ; ALKANE DISTRIBUTIONS ; TIBETAN PLATEAU ; D VALUES ; LAKE ; BIOMARKERS ; ALGAE ; PRECIPITATION
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
语种英语
WOS记录号WOS:000484999000009
出版者SCIENCE PRESS
资助机构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
源URL[http://ir.ieecas.cn/handle/361006/13536]  
专题地球环境研究所_加速器质谱中心
通讯作者Liu, Weiguo
作者单位1.Univ Hong Kong, Dept Earth Sci, Hong Kong 999077, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China
3.Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Jiangsu, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, 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.

入库方式： OAI收割

来源：地球环境研究所

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