IB-CAS  > 植被与环境变化国家重点实验室
Preliminary study on pollen, charcoal records and environmental evolution of Alahake Saline Lake in Xinjiang since 4,700 cal yr BP
Li, Yumei1; Zhang, Yun1; Wang, Jian2; Wang, Li1,3; Li, Yuanyuan1,3; Chen, Lixin1,3; Zhao, Long4; Kong, Zhaochen1
2019
Source PublicationQUATERNARY INTERNATIONAL
ISSN1040-6182
Volume513Pages:8-17
AbstractHuman 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.
KeywordPollen Charcoal Organic carbon Conductivity Alahake Saline Lake Xinjiang
Subject AreaGeography, Physical ; Geosciences, Multidisciplinary
DOI10.1016/j.quaint.2019.01.014
Indexed BySCI
Language英语
WOS KeywordHOLOCENE CLIMATE ; FIRE REGIMES ; CENTRAL-ASIA ; YILI VALLEY ; VEGETATION ; ASSEMBLAGES ; SEDIMENTS ; HISTORY ; CHINA
WOS Research AreaPhysical Geography ; Geology
WOS IDWOS:000469328000002
PublisherPERGAMON-ELSEVIER SCIENCE LTD
SubtypeArticle
Publication PlaceOXFORD
EISSN1873-4553
Funding OrganizationNational Natural Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC) [41572331, 41272386, 40601104] ; Strategic Priority Research Program of the Chinese Academy of Sciences, China [XDA19050103] ; Special Fund for Basic Scientific Research of the Chinese Academy of Geological Sciences, China [YYWF201627]
Corresponding Author Emailzhangygl@ibcas.ac.cn
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ibcas.ac.cn/handle/2S10CLM1/19539
Collection植被与环境变化国家重点实验室
Affiliation1.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
Recommended Citation
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]. QUATERNARY INTERNATIONAL,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.
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