Concentration and distributions of fatty acids in algae, submerged plants and terrestrial plants from the northeastern Tibetan Plateau

doi:10.1016/j.orggeochem.2017.08.008

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	Concentration and distributions of fatty acids in algae, submerged plants and terrestrial plants from the northeastern Tibetan Plateau
	Liu, Hu 1,2; Liu, Weiguo 1
	2017-11-01
发表期刊	ORGANIC GEOCHEMISTRY
卷号	113 期号:2017 页码:17-26
文章类型	Article
摘要	We systematically investigated the concentration and distributions of saturated fatty acids (FAs) in 66 submerged plants (including 48 Potamogeton, 7 Myriophyllum and 11 Ruppia), 59 algae (including 26 Chara, 20 Cladophora and 13 Spirogyra) and 32 terrigenous plants from 18 lakes on the northeastern Tibetan Plateau. The results indicate that C-14-C-32 FAs in algae, submerged plants and terrigenous plants were dominated mainly by C-16 and C-20-C-32. FAs in algae and submerged plants were predominantly C-24, but also contained a relatively high abundance of C-26. The submerged plants had high C-26-C-32 concentration, with average values of 216 lg/g for Potamogeton, 52 lg/g for Myriophyllum and 134 lg/g for Ruppia, close to those of terrigenous plants (avg. 161 lg/g). Algae exhibited low C-26-C-32 FA concentration, with mean values of 7 lg/g for Chara, 8 lg/g for Cladophora and 18 lg/g for Spirogyra. The C-26-C-32 FAs in algae and submerged plants accounted for a large proportion of C-20-C-32, yielding average ratios (C-26-C-32 vs. C-20-C-32) of 33, 35, 31, 15, 19 and 23% for Potamogeton, Myriophyllum, Ruppia, Chara, Cladophora and Spirogyra, respectively. Therefore, the contribution of submerged plant C-26-C-32 FAs to lake sediments should be considered due to their high concentration, whereas the influence of algae was minor. Meanwhile, by comparing the values of average chain length (ACL), alga/terrigenous ratio (ATR) and submerged/terrestrial ratio (STR), we found that ACL14-32 and ATR could be used to distinguish algal FAs from those of other plants and that STR could be used to differentiate FA sources from submerged and terrestrial plants. Thus, we suggest that using specific chain lengths to determine source inputs is not adequate when applying sedimentary FAs for paleoclimatic reconstruction, while ACL 14-32, ATR and STR may aid in determining FA sources in sedimentary records. (C) 2017 Elsevier Ltd. All rights reserved.
关键词	Fatty Acids Terrestrial Plants Submerged Plants Algae Tibetan Plateau
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1016/j.orggeochem.2017.08.008
关键词[WOS]	N-ALKYL LIPIDS ; LAKE DONGGI CONA ; ORGANIC GEOCHEMISTRY ; LACUSTRINE SEDIMENTS ; ISOTOPIC COMPOSITION ; CLIMATE VARIABILITY ; HYDROGEN ISOTOPES ; ALKANOIC ACIDS ; CUTICULAR WAX ; EAST-AFRICA
收录类别	SCI
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000414812800003
引用统计	被引频次：38[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/361006/5389
专题	加速器质谱中心
作者单位	1.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710061, Shaanxi, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Hu,Liu, Weiguo. Concentration and distributions of fatty acids in algae, submerged plants and terrestrial plants from the northeastern Tibetan Plateau[J]. ORGANIC GEOCHEMISTRY,2017,113(2017):17-26.
APA	Liu, Hu,&Liu, Weiguo.(2017).Concentration and distributions of fatty acids in algae, submerged plants and terrestrial plants from the northeastern Tibetan Plateau.ORGANIC GEOCHEMISTRY,113(2017),17-26.
MLA	Liu, Hu,et al."Concentration and distributions of fatty acids in algae, submerged plants and terrestrial plants from the northeastern Tibetan Plateau".ORGANIC GEOCHEMISTRY 113.2017(2017):17-26.

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