干旱区生态环境知识资源中心(Arid): Preliminary study on pollen, charcoal records and environmental evolution of Alahake Saline Lake in Xinjiang since 4,700 cal yr BP

Arid

DOI	10.1016/j.quaint.2019.01.014
	Preliminary study on pollen, charcoal records and environmental evolution of Alahake Saline Lake in Xinjiang since 4,700 cal yr BP
	Li, Yumei 1,2; Zhang, Yun 2; Wang, Jian 3; Wang, Li 2,4; Li, Yuanyuan 2,4; Chen, Lixin 2,4; Zhao, Long 5; Kong, Zhaochen 2
通讯作者	Zhang, Yun
来源期刊	QUATERNARY INTERNATIONAL
ISSN	1040-6182
EISSN	1873-4553
出版年	2019
卷号	513 页码:8-17
英文摘要	Human activity can affect the vegetation types and sedimentary records of a region. In this study, we used multiproxy records from a 140-cm sediment profile, including pollen, charcoal, organic carbon, conductivity, and hydrochemical analyses, to reconstruct a vegetation history for Alahake Saline Lake in northern Xinjiang, China. Fossil charcoal pieces (>= 100 mu m) were used to reconstruct fire history from the sedimentary record. A significant change in the presence of charcoal indicated an increasing occurrence of fire in the Alahake landscape over the past 4730 years. A peak charcoal concentration occurred at a depth of 0-28 cm, indicating intensified human activity since 790 cal. yr BP. For the same period, pollen assemblages revealed some distinct regional vegetation changes; from 4730 to 3600 cal. yr BP, the landscape was relatively rich in tree species and other vegetation types; from 3600-790 cal. yr BP, trees began to decline while the abundance of Chenopodiaceae increased sharply, indicating environmental degradation. The occurrence of Betula spp. (birch) pollen decreased markedly up to 410 cal. yr BP, suggesting the progressive disappearance of birch trees from the landscape, and the salinity of the lake increased (conductivity peaked above 14.16 ms/cm). High lake salinity and increasing anthropogenic activity have been the two most important factors driving historical changes in the abundance of birch in the Alahake Saline Lake region over the past 790 years. The results of this study are of significance for biodiversity conservation planning and wetland protection in semi-arid and arid areas of China.
英文关键词	Pollen Charcoal Organic carbon Conductivity Alahake Saline Lake Xinjiang
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000469328000002
WOS关键词	HOLOCENE CLIMATE ; FIRE REGIMES ; CENTRAL-ASIA ; YILI VALLEY ; VEGETATION ; ASSEMBLAGES ; SEDIMENTS ; HISTORY ; CHINA
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	中国科学院植物研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218238
作者单位	1.Jilin Univ, Coll Earth Sci, Changchun 130061, Jilin, Peoples R China; 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China; 3.Xinjiang Altai Forestry Res Inst, Altai 836500, Xinjiang, Peoples R China; 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China; 5.Beijing Inst Geoenvironsment Monitoring, Beijing 100195, Peoples R China
推荐引用方式 GB/T 7714	Li, Yumei,Zhang, Yun,Wang, Jian,et al. Preliminary study on pollen, charcoal records and environmental evolution of Alahake Saline Lake in Xinjiang since 4,700 cal yr BP[J]. 中国科学院植物研究所,2019,513:8-17.
APA	Li, Yumei.,Zhang, Yun.,Wang, Jian.,Wang, Li.,Li, Yuanyuan.,...&Kong, Zhaochen.(2019).Preliminary study on pollen, charcoal records and environmental evolution of Alahake Saline Lake in Xinjiang since 4,700 cal yr BP.QUATERNARY INTERNATIONAL,513,8-17.
MLA	Li, Yumei,et al."Preliminary study on pollen, charcoal records and environmental evolution of Alahake Saline Lake in Xinjiang since 4,700 cal yr BP".QUATERNARY INTERNATIONAL 513(2019):8-17.