globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2013.02.015
论文题名:
Vegetation response in the southern Lake Baikal region to abrupt climate events over the past 33calkyr
作者: Shichi K.; Takahara H.; Hase Y.; Watanabe T.; Nara F.W.; Nakamura T.; Tani Y.; Kawai T.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 375
起始页码: 70
结束页码: 82
语种: 英语
英文关键词: 8.2calka cooling event ; Holocene ; Lake Baikal ; Pollen analysis ; Vegetation change ; Younger Dryas
英文摘要: We reconstructed vegetation changes and fire events in the southern Lake Baikal region over the past 33. cal. kyr using a sediment core from the Buguldeika Saddle, southern Lake Baikal, to examine vegetation response to past short-term climate variations. Herbs, such as Artemisia and Asteraceae, were dominant just before the Last Glacial Maximum (LGM). Low pollen accumulation rates (PARs) with little herb pollen indicate sparse herbaceous vegetation cover during the LGM. Picea expanded after the Bølling interval, suggesting expansion of riparian areas, and shrub Alnus rapidly increased during the following Allerød interval. Abies and Pinus subgen. Haploxylon began to increase at the beginning of the Holocene and Pinus subgen. Diploxylon has been highly dominant since the middle Holocene. The vegetation change after the LGM is similar to that from other sites in the Lake Baikal region, but the responses to short-term climate events are pronounced. Fluctuations in herb elements and vegetation cover as indicated by the PAR correspond to the Younger Dryas (YD) cooling event. The decline in the PAR and increase in herb taxa were remarkable at the beginning of the YD, but Larix and Picea trees were distributed in river valleys near Lake Baikal in the latter half. The rapid expansion of Betula and Artemisia following frequent fires in the early Holocene may have been in response to the 8.2. cal. ka. BP cooling event. From these findings, the southern Lake Baikal region, including the Selenga River basin, may possibly have been more sensitive than other parts of the region to abrupt climate changes. © 2013 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69782
Appears in Collections:过去全球变化的重建

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作者单位: Forestry and Forest Products Research Institute, 1 Matsunosato, Tsukuba 305-8687, Japan; Graduate School of Agriculture, Kyoto Prefectural University, 1-5 Hangi-cho, Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan; Goshoura Cretaceous Museum, 4310-5 Goshoura, Goshoura-cho, Amakusa 866-0313, Japan; Graduate School of Environment Studies, Tohoku University, 6-6-20 Aramaki Aza Aoba, Aoba-ku, Sendai 980-8578, Japan; Center for Chronological Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan; Institute for Environmental Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku Shizuoka 422-8526, Japan; Association of International Research Initiatives for Environmental Studies, 1-4-4 Ueno, Taitou-ku, Tokyo 110-0005, Japan

Recommended Citation:
Shichi K.,Takahara H.,Hase Y.,et al. Vegetation response in the southern Lake Baikal region to abrupt climate events over the past 33calkyr[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,375
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