Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/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
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ISSN | 0031-0182 |
EISSN | 1872-616X |
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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