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n-Alkane distributions and concentrations in algae, submerged plants and terrestrial plants from the Qinghai-Tibetan Plateau
Liu, Hu1,3; Liu, Weiguo1,2
2016-09-01
Source PublicationORGANIC GEOCHEMISTRY
Volume99Issue:2016Pages:10-22
SubtypeArticle
AbstractLong 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.
KeywordN-alkanes Terrestrial Plants Submerged Plants Algae Qinghai-tibetan Plateau
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.orggeochem.2016.06.003
WOS KeywordDELTA-D VALUES ; HYDROGEN ISOTOPE RATIOS ; CHINESE LOESS PLATEAU ; LEAF WAX ; LAKE QINGHAI ; CHEMOTAXONOMIC SIGNIFICANCE ; NAM CO ; LACUSTRINE SEDIMENTS ; ENVIRONMENTAL-CHANGE ; SURFACE SEDIMENTS
Indexed BySCI
Language英语
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000381578000002
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Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5664
Collection加速器质谱中心
Affiliation1.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
Recommended Citation
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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