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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
Li, Quan
2019-07-01
Source PublicationVEGETATION HISTORY AND ARCHAEOBOTANY
ISSN0939-6314
Volume28Issue:4Pages:365-377
Corresponding AuthorLi, Quan(liquan@igsnrr.ac.cn)
AbstractLacustrine 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.
KeywordModern pollen assemblage Surface lake sediment Nam Co Tibetan Plateau
DOI10.1007/s00334-018-0699-2
WOS KeywordENVIRONMENTAL-CHANGES ; CLIMATE CHANGES ; SOURCE AREA ; HOLOCENE ; MOUNTAINS ; RECONSTRUCTIONS ; RECORD ; BASIN ; VARIABILITY ; GRAINS
Indexed BySCI
Language英语
Funding ProjectStrategic 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]
Funding OrganizationStrategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China
WOS Research AreaPlant Sciences ; Paleontology
WOS SubjectPlant Sciences ; Paleontology
WOS IDWOS:000470336200001
PublisherSPRINGER
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Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/59162
Collection中国科学院地理科学与资源研究所
Corresponding AuthorLi, Quan
AffiliationChinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China
Recommended Citation
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.
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