n-Alkane distributions and concentrations in algae, submerged plants and terrestrial plants from the Qinghai-Tibetan Plateau

doi:10.1016/j.orggeochem.2016.06.003

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	n-Alkane distributions and concentrations in algae, submerged plants and terrestrial plants from the Qinghai-Tibetan Plateau
	Liu, Hu 1,3; Liu, Weiguo 1,2
	2016-09-01
发表期刊	ORGANIC GEOCHEMISTRY
卷号	99 期号:2016 页码:10-22
文章类型	Article
摘要	Long chain n-alkanes (C-27-C-33) in lake sediment records are commonly considered to be terrestrial plant biomarkers when reconstructing paleoclimatic and paleolimnological history. However, the extent to which their accumulation is influenced by n-alkanes originating from algae and submerged plants is largely unclear. Furthermore, to our knowledge, few studies have systematically analyzed the variation in n-alkane concentration or distributions between different submerged plant and algal species. We systematically investigated the n-alkane distributions of 13 algae (including 10 Cladophora and 3 Spirogyra), 68 submerged plants (including 37 Potamogeton, 7 Myriophyllum, 4 Ruppiaceae and 20 Chara) and 13 terrestrial plants (including 7 grasses and 6 shrubs) from 16 Qinghai -Tibetan Plateau lakes. The results indicate that the total n-alkane (C-21-C-33) concentration varied between different submerged plants. Potamogeton, Myriophyllum and Ruppiaceae exhibited high concentration, with average values 235.8, 295.9 and 275.9 mu g/g, respectively. These values were slightly higher than the concentrations found in terrestrial plant leaves (avg. 206.4 mu g/g), whereas the average concentration in Chara was only 2.0 mu g/g, significantly lower than that of other submerged plants. Similarly, the concentration in algae was also very low, with average values of 2.0 mu g/g and 4.0 mu g/g for Cladophora and Spirogyra, respectively. Submerged plant and algal long chain (C-27-C-33) alkanes accounted for a large proportion of the total C-21-C-33 n-alkanes, with average ratios (long chain vs. total n-alkanes) of 20, 3, 22 and 27% for Potamogeton, Myriophyllum, Ruppiaceae and Chara, respectively. Cladophora and Spirogyra exhibited average ratios of 34% and 65%, respectively. Therefore, submerged plant long chain n-alkane contributions to lacustrine sediments, especially those of Potamogeton and Ruppiaceae, should not be considered negligible due to their high n-alkane concentration. Conversely, some algae, such as Cladophora and Spirogyra, minimally contributed n-alkanes to the lake sediments. (C) 2016 Elsevier Ltd. All rights reserved.
关键词	N-alkanes Terrestrial Plants Submerged Plants Algae Qinghai-tibetan Plateau
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1016/j.orggeochem.2016.06.003
关键词[WOS]	DELTA-D VALUES ; HYDROGEN ISOTOPE RATIOS ; CHINESE LOESS PLATEAU ; LEAF WAX ; LAKE QINGHAI ; CHEMOTAXONOMIC SIGNIFICANCE ; NAM CO ; LACUSTRINE SEDIMENTS ; ENVIRONMENTAL-CHANGE ; SURFACE SEDIMENTS
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:000381578000002
引用统计	被引频次：97[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/361006/5664
专题	加速器质谱中心
作者单位	1.Chinese Acad Sci, IEE, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 2.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Hu,Liu, Weiguo. n-Alkane distributions and concentrations in algae, submerged plants and terrestrial plants from the Qinghai-Tibetan Plateau[J]. ORGANIC GEOCHEMISTRY,2016,99(2016):10-22.
APA	Liu, Hu,&Liu, Weiguo.(2016).n-Alkane distributions and concentrations in algae, submerged plants and terrestrial plants from the Qinghai-Tibetan Plateau.ORGANIC GEOCHEMISTRY,99(2016),10-22.
MLA	Liu, Hu,et al."n-Alkane distributions and concentrations in algae, submerged plants and terrestrial plants from the Qinghai-Tibetan Plateau".ORGANIC GEOCHEMISTRY 99.2016(2016):10-22.

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