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Spatial variability and long-term change in pollen diversity in Nam Co catchment (central Tibetan Plateau): Implications for alpine vegetation restoration from a paleoecological perspective
Li, Quan
2018-03-01
Source PublicationSCIENCE CHINA-EARTH SCIENCES
ISSN1674-7313
Volume61Issue:3Pages:270-284
Corresponding AuthorLi, Quan(liquan@igsnrr.ac.cn)
AbstractPollen diversity offers abundant clues into the floristic diversity and history of vegetation change. Few palynological studies investigated modern pollen diversity or the past floristic diversity on the Tibetan Plateau (TP). Based on modern pollen assemblages from 37 topsoils and 63 surface lake sediments in the Nam Co catchment on the central TP, this study quantitatively explored spatial distribution of modern pollen diversity using Shannon-Wiener index (H) and palynological richness (E(T (n) ), n=600). Pollen diversity indices showed spatial variability among vegetation types, reflecting the differences in terrestrial floristic diversity in the lake catchment. Their values were high in the southeastern region of the lake catchment which is covered by alpine steppe, while values were low for alpine meadow and marsh meadow. The pollen diversity in lacustrine pollen assemblage could be an effective proxy to document past floristic diversity. The past floristic diversity in the lake catchment, recovered from a fossil pollen record of NMLC-1, showed a long-term change of ascending overlaid by several rapid diversity changes during the last 8400 years due to the downward shift of altitudinal vegetation belt driven by a general climatic cooling. The results imply that under the environmental challenge of climate warming and vegetation degradation, alpine vegetation restoration in the Nam Co catchment and the central TP should pay attention to altitudinal vegetation belt and zonal vegetation of alpine steppe, and use the long-term change of floristic diversity as a historical analogue.
KeywordPollen diversity Palynological richness Vegetation restoration Nam Co Lake Tibetan Plateau
DOI10.1007/s11430-017-9133-0
WOS KeywordLAST GLACIAL MAXIMUM ; CHINESE LOESS PLATEAU ; ENVIRONMENTAL-CHANGES ; PLANT DIVERSITY ; CLIMATE-CHANGE ; PALYNOLOGICAL RICHNESS ; LAKE-SEDIMENTS ; WESTERN TIBET ; SOURCE AREA ; 8.4 KABP
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41471169] ; National Natural Science Foundation of China[41690113] ; National Natural Science Foundation of China[41271226] ; National Natural Science Foundation of China[41571189] ; National Natural Science Foundation of China[41330105]
Funding OrganizationNational Natural Science Foundation of China
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000426574800003
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/57149
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. Spatial variability and long-term change in pollen diversity in Nam Co catchment (central Tibetan Plateau): Implications for alpine vegetation restoration from a paleoecological perspective[J]. SCIENCE CHINA-EARTH SCIENCES,2018,61(3):270-284.
APA Li, Quan.(2018).Spatial variability and long-term change in pollen diversity in Nam Co catchment (central Tibetan Plateau): Implications for alpine vegetation restoration from a paleoecological perspective.SCIENCE CHINA-EARTH SCIENCES,61(3),270-284.
MLA Li, Quan."Spatial variability and long-term change in pollen diversity in Nam Co catchment (central Tibetan Plateau): Implications for alpine vegetation restoration from a paleoecological perspective".SCIENCE CHINA-EARTH SCIENCES 61.3(2018):270-284.
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