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Distribution and vegetation representation of pollen assemblages from surface sediments of Nam Co, a large alpine lake in the central Tibetan Plateau

文献类型：期刊论文

作者Li, Quan
刊名VEGETATION HISTORY AND ARCHAEOBOTANY
出版日期2019-07-01
卷号28期号:4页码:365-377
关键词Modern pollen assemblage Surface lake sediment Nam Co Tibetan Plateau
ISSN号0939-6314
DOI10.1007/s00334-018-0699-2
通讯作者Li, Quan(liquan@igsnrr.ac.cn)
英文摘要Lacustrine fossil pollen records have been widely used to reconstruct palaeovegetation and palaeoclimate changes on the Tibetan Plateau (TP). However, little is known about the vegetation representation of modern lacustrine pollen assemblages there. This paper presents the results of modern pollen investigation on 63 surface sediments from the lake basin and 37 topsoil samples from the drainage area of a large lake, Nam Co, located in the central TP. It aims to assess quantitatively the influences on lacustrine pollen assemblages of the pollen sources and sedimentary processes, and to establish vegetation representations for modern lacustrine pollen assemblages. Modern pollen assemblages from topsoils of different vegetation had diagnostic features in terms of their composition and pollen percentage. The spatial variabilities and results of principal component analysis suggested that lacustrine pollen assemblages were influenced by both the regional/local source vegetation and sedimentary processes. The lacustrine pollen assemblages were mainly homogeneous due to in-lake sedimentary processes (mixing and redistribution). An accumulation zone for lacustrine pollen assemblages was found in the deep lake basin (depth>60m) due to sediment focusing. The results of boosted regression tree analysis further confirmed that source vegetation was the predominant factor (85.8%) responsible for the vegetation representation of lacustrine pollen assemblages, while sedimentary processes accounted for only 14.2%. The results of discriminant analysis indicated that most lacustrine pollen assemblages (90.5%) were representative for the regional vegetation of alpine steppe in the Nam Co catchment and central TP, while only 9.5% were representative for the local meadow vegetation. Therefore, it is recommended that lacustrine pollen assemblages from deep lake basin of accumulation zone in large lakes of the TP can be used to retrieve efficiently the signals from regional vegetation and climate changes.
WOS关键词ENVIRONMENTAL-CHANGES ; CLIMATE CHANGES ; SOURCE AREA ; HOLOCENE ; MOUNTAINS ; RECONSTRUCTIONS ; RECORD ; BASIN ; VARIABILITY ; GRAINS
资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDA20070101] ; National Natural Science Foundation of China[41471169] ; National Natural Science Foundation of China[41330105] ; National Natural Science Foundation of China[41571189] ; National Natural Science Foundation of China[41690113] ; National Natural Science Foundation of China[41271226]
WOS研究方向Plant Sciences ; Paleontology
语种英语
WOS记录号WOS:000470336200001
出版者SPRINGER
资助机构Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/59161]  
专题中国科学院地理科学与资源研究所
通讯作者Li, Quan
作者单位Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714		 Li, Quan. Distribution and vegetation representation of pollen assemblages from surface sediments of Nam Co, a large alpine lake in the central Tibetan Plateau[J]. VEGETATION HISTORY AND ARCHAEOBOTANY,2019,28(4):365-377.
APA Li, Quan.(2019).Distribution and vegetation representation of pollen assemblages from surface sediments of Nam Co, a large alpine lake in the central Tibetan Plateau.VEGETATION HISTORY AND ARCHAEOBOTANY,28(4),365-377.
MLA Li, Quan."Distribution and vegetation representation of pollen assemblages from surface sediments of Nam Co, a large alpine lake in the central Tibetan Plateau".VEGETATION HISTORY AND ARCHAEOBOTANY 28.4(2019):365-377.

入库方式： OAI收割

来源：地理科学与资源研究所

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