Arid
DOI10.1016/j.palaeo.2012.06.022
Temporally changing drivers for late-Holocene vegetation changes on the northern Tibetan Plateau
Wang, Yongbo1,2; Liu, Xingqi1; Herzschuh, Ulrike2,3; Yang, Xiangdong1; Birks, H. John B.4,5,6,7; Zhang, Enlou1; Tong, Guobang8
通讯作者Liu, Xingqi
来源期刊PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
EISSN1872-616X
出版年2012
卷号353页码:10-20
英文摘要

Fossil pollen records have been widely used as indicators of past changes in vegetation and variations in climate. The driving mechanisms behind these vegetation changes have, however, remained unclear. In order to evaluate vegetation changes that have occurred in the northern part of the Tibetan Plateau and the possible drivers behind these changes, we have applied a moving-window Redundancy Analysis (RDA) to high resolution (10-15 years) pollen and sedimentary data from Lake Kusai covering the last 3770 years. Our analyses reveal frequent fluctuations in the relative abundances of alpine steppe and alpine desert components. The sedimentary proxies (including total organic carbon content, total inorganic carbon content, and "end-member" indices from grain-size analyses) that explain statistically some of the changes in the pollen assemblage vary significantly with time, most probably reflecting multiple underlying driving processes. Climate appears to have had an important influence on vegetation changes when conditions were relatively wet and stable. However, a gradual decrease in vegetation cover was identified after 1500 cal a BP, after which the vegetation appears to have been affected more by extreme events such as dust-storms or fluvial erosion than by general climatic trends. Furthermore, pollen spectra over the last 600 years are shown by Procrustes analysis to be statistically different from those recovered from older samples, which we attribute to increased human impact that resulted in unprecedented changes to the vegetation composition. Overall, changes in vegetation and climate on the northern part of the Tibetan Plateau appear to have roughly followed the evolution of the Asian Summer Monsoon. After taking into account the highly significant millennial (1512 years) periodicity revealed by time-series analysis, the regional vegetation and climate changes also show variations that appear to match variations in the mid-latitude westerlies. (c) 2012 Elsevier B.V. All rights reserved.


英文关键词Asian Summer Monsoon Late-Holocene Pollen Procrustes analysis Redundancy analysis Tibetan Plateau Vegetation Westerlies
类型Article
语种英语
国家Peoples R China ; Germany ; Norway ; England
收录类别SCI-E
WOS记录号WOS:000308897700002
WOS关键词ASIAN MONSOON ; LAKE-SEDIMENTS ; POLLEN RECORD ; QINGHAI LAKE ; ENVIRONMENTAL-CHANGES ; SIZE DISTRIBUTIONS ; ATLANTIC CLIMATE ; ALASHAN PLATEAU ; LACUSTRINE CORE ; HIGH-RESOLUTION
WOS类目Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向Physical Geography ; Geology ; Paleontology
来源机构University of London ; University of Oxford
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/174315
作者单位1.Chinese Acad Sci, State Key Lab Lake Sci & Environm, Nanjing Inst Geog & Limnol, Nanjing 210008, Peoples R China;
2.Alfred Wegener Inst Polar & Marine Res, Res Unit Potsdam, D-14473 Potsdam, Germany;
3.Univ Potsdam, Inst Earth & Environm Sci, D-14476 Potsdam, Germany;
4.Univ Bergen, Dept Biol, N-5006 Bergen, Norway;
5.Bjerknes Ctr Climate Res, N-5007 Bergen, Norway;
6.UCL, Environm Change Res Ctr, London WC1E 6BT, England;
7.Univ Oxford, Sch Geog & Environm, Oxford OX1 3QY, England;
8.Chinese Acad Geol Sci, Inst Hydrol & Environm Geol, Zhengding 050803, Peoples R China
推荐引用方式
GB/T 7714
Wang, Yongbo,Liu, Xingqi,Herzschuh, Ulrike,et al. Temporally changing drivers for late-Holocene vegetation changes on the northern Tibetan Plateau[J]. University of London, University of Oxford,2012,353:10-20.
APA Wang, Yongbo.,Liu, Xingqi.,Herzschuh, Ulrike.,Yang, Xiangdong.,Birks, H. John B..,...&Tong, Guobang.(2012).Temporally changing drivers for late-Holocene vegetation changes on the northern Tibetan Plateau.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,353,10-20.
MLA Wang, Yongbo,et al."Temporally changing drivers for late-Holocene vegetation changes on the northern Tibetan Plateau".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 353(2012):10-20.
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