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Late Pliocene vegetation turnover on the NE Tibetan Plateau (Central Asia) triggered by early Northern Hemisphere glaciation
Koutsodendris, A (Koutsodendris, Andreas)1; Allstadt, FJ (Allstaedt, Frederik J.)1; Kern, OA (Kern, Oliver A.)1; Kousis, I (Kousis, Ilias)1; Schwarz, F (Schwarz, Florian)2; Vannacci, M (Vannacci, Martina)1; Woutersen, A (Woutersen, Amber)3; Appel, E (Appel, Erwin)4; Berke, MA (Berke, Melissa A.)5; Fang, XM (Fang, Xiaomin)6; Friedrich, O (Friedrich, Oliver)1; Hoorn, C (Hoorn, Carina)3; Salzmann, U (Salzmann, Ulrich)2; Pross, J (Pross, Joerg)1
Source PublicationGLOBAL AND PLANETARY CHANGE
2019
Volume180Issue:0Pages:117-125
DOI10.1016/j.gloplacha.2019.06.001
Abstract

To reconstruct the timing and underlying forcing of major shifts in the composition of terrestrial ecosystems in arid Central Asia during the late Cenozoic (past similar to 7 Ma), we carry out palynological analysis of lake sediments from the Qaidam Basin (NE Tibetan Plateau, China). Our results show that the steppe/semi-desert biomes dominating the Qaidam Basin experienced marked turnovers at similar to 3.6 and 3.3 Ma. Most notably, the younger of these turnover events is characterized by a two- to three-fold expansion of Artemisia at the expense of other steppe/semi-desert taxa. This turnover event led to the replacement of the Ephedraceae/Chenopodiaceae-dominated and Nitraria-rich steppe/semi-deserts that were dominant in the Qaidam Basin during the Paleogene and abundant during the Miocene by Artemisia/Chenopodiaceae-dominated steppe/semi-deserts as they exist until today. The vegetation turnover events are synchronous with shifts towards drier conditions in Central Asia as documented in climate records from the Chinese Loess Plateau and the Central North Pacific Ocean. On a global scale, they can be correlated to early glaciation events in the Northern Hemisphere during the Pliocene. Integration of our palynological data from the Qaidam Basin with Northern Hemisphere climate-proxy and regional-scale tectonic information suggests that the uplift of the Tibetan Plateau posed ecological pressure on Central Asian plant communities, which made them susceptible to the effects of early Northern Hemisphere glaciations during the late Pliocene. Although these glaciations were relatively small in comparison to their Pleistocene counterparts, the transition towards drier/colder conditions pushed previously existing plant communities beyond their tolerance limits, thereby causing a fundamental reorganization of arid ecosystems. The Artemisia dominance since similar to 3.3 Ma resulting from this reorganization marks a point in time after which the Artemisia/Chenopodiaceae pollen ratio can serve as a reliable indicator for moisture availability in Central Asia.

Subject AreaGeosciences
WOS IDWOS:000478709700008
Language英语
Indexed BySCI
KeywordWestern Qaidam Basin Drill Core Sg-1 Climate-change Palynological Record Holocene Vegetation Pollen Uplift China Lake Ma
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
Cooperation Status国际
ISSN0921-8181
Department大陆碰撞与高原隆升重点实验室
URL查看原文
PublisherELSEVIER
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9181
Collection图书馆
Corresponding AuthorKoutsodendris, A (Koutsodendris, Andreas)
Affiliation1.Heidelberg Univ, Inst Earth Sci, D-69120 Heidelberg, Germany;
2.Northumbria Univ, Dept Geog & Environm Sci, Newcastle Upon Tyne NE1 8ST, Tyne & Wear, England;
3.Univ Amsterdam, Inst Biodivers & Ecosyst Dynam, NL-1090 GE Amsterdam, Netherlands;
4.Univ Tubingen, Dept Geosci, D-72074 Tubingen, Germany;
5.Univ Notre Dame, Dept Civil & Environm Engn & Earth Sci, 156 Fitzpatrick Hall, Notre Dame, IN 46556 USA;
6.Chinese Acad Sci, Inst Tibetan Plateau Res, POB 2871, Beijing 100085, Peoples R China.
Recommended Citation
GB/T 7714
Koutsodendris, A ,Allstadt, FJ ,Kern, OA ,et al. Late Pliocene vegetation turnover on the NE Tibetan Plateau (Central Asia) triggered by early Northern Hemisphere glaciation[J]. GLOBAL AND PLANETARY CHANGE,2019,180(0):117-125.
APA Koutsodendris, A .,Allstadt, FJ .,Kern, OA .,Kousis, I .,Schwarz, F .,...&Pross, J .(2019).Late Pliocene vegetation turnover on the NE Tibetan Plateau (Central Asia) triggered by early Northern Hemisphere glaciation.GLOBAL AND PLANETARY CHANGE,180(0),117-125.
MLA Koutsodendris, A ,et al."Late Pliocene vegetation turnover on the NE Tibetan Plateau (Central Asia) triggered by early Northern Hemisphere glaciation".GLOBAL AND PLANETARY CHANGE 180.0(2019):117-125.
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