气候变化领域集成服务门户(CCPortal): Spatial distribution ofn-alkanes in surface sediments of Selin Co Lake, central Tibetan Plateau, China

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DOI	10.1007/s10933-020-00148-8
	Spatial distribution ofn-alkanes in surface sediments of Selin Co Lake, central Tibetan Plateau, China
	Kou, Qiangqiang; Lin, Xiao; Wang, Junbo; Yu, Siwei; Kai, Jinlei; Laug, Andreas; Zhu, Liping
通讯作者	Lin, X (通讯作者)
发表日期	2021
ISSN	0921-2728
EISSN	1573-0417
起始页码	53
结束页码	67
卷号	65 期号:1
英文摘要	n-Alkanes are biomarkers that are widely used as paleoenvironmental reconstruction proxies in lacustrine sediments. However, studies on their sedimentation and factors affecting sedimentation in large lakes remain relatively scarce. In this study, 120 surface sediments collected from Selin Co, central Tibetan Plateau, were used to analyze the spatial distribution ofn-alkanes in a modern sedimentary system, and the factors controlling this distribution were further discussed. The sedimentaryn-alkanes of Selin Co were mainly long- and middle-chain components with single or double peaks, belonging to the mixed-type input of terrestrial and aquatic plants. Leaf waxes derived from terrestrial plants in the catchment of Selin Co were the main source followed by aquatic plants, while planktonic algae living in the lake water column was a minor source, as demonstrated by their low concentration. The distribution of aquatic and terrigenousn-alkanes in the surface sediments showed a significant spatial heterogeneity; this was controlled by different factors and sedimentary processes. The distribution of terrigenousn-alkanes was mainly controlled by underwater topography; high concentrations in the sedimentary center of the east lake basin and the sub-basin in the northwest were evident. Aquaticn-alkanes were found in substantially higher concentrations in the western estuary of Zhagen River and Ali River, as well as in the southern sub-basin, Yagen Co. These distributions might be influenced by differences of geographical environment in the watershed of these main inflow rivers, as well as the intensity of sunlight, itself intensity controlled by the transparency of the water column. Althoughn-alkanes from the center of a lake could represent an integration of catchments in most cases, their spatial heterogeneity in large lakes like Selin Co would introduce uncertainty to paleoenvironmental reconstructions. Consequently, it is very important to investigate thoroughly the spatial distribution and controlling factors ofn-alkanes in modern lake environments. It is inferred that these findings will have broad significance in large lakes similar to Selin Co, and that they will benefit studies that usen-alkanes as proxies to reconstruct past environmental changes.
关键词	WAX N-ALKANES NAM-CO ENVIRONMENTAL-CHANGES ORGANIC-MATTER ISOTOPIC COMPOSITION WATER CARBON RECONSTRUCTION PHOTOSYNTHESIS GEOCHEMISTRY
英文关键词	n-Alkanes; Spatial distribution; Surface sediments; Selin Co; Tibetan Plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Marine & Freshwater Biology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Limnology
WOS记录号	WOS:000561011100001
来源期刊	JOURNAL OF PALEOLIMNOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260373
推荐引用方式 GB/T 7714	Kou, Qiangqiang,Lin, Xiao,Wang, Junbo,et al. Spatial distribution ofn-alkanes in surface sediments of Selin Co Lake, central Tibetan Plateau, China[J]. 中国科学院青藏高原研究所,2021,65(1).
APA	Kou, Qiangqiang.,Lin, Xiao.,Wang, Junbo.,Yu, Siwei.,Kai, Jinlei.,...&Zhu, Liping.(2021).Spatial distribution ofn-alkanes in surface sediments of Selin Co Lake, central Tibetan Plateau, China.JOURNAL OF PALEOLIMNOLOGY,65(1).
MLA	Kou, Qiangqiang,et al."Spatial distribution ofn-alkanes in surface sediments of Selin Co Lake, central Tibetan Plateau, China".JOURNAL OF PALEOLIMNOLOGY 65.1(2021).