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Modern pollen assemblages from surface lake sediments and their environmental implications on the southwestern Tibetan Plateau
Ma, QF (Ma, Qingfeng)1; Zhu, LP (Zhu, Liping)1,2; Lu, XM (Lu, Xinmiao)1,2; Wang, Y (Wang, Yong)1; Guo, Y (Guo, Yun)1; Wang, JB (Wang, Junbo)1,2; Ju, JT (Ju, Jianting)1; Peng, P (Peng, Ping)1; Tang, LY (Tang, Lingyu)3; Ma, QF
Source PublicationBOREAS
2017
Volume46Issue:2Pages:242-253
DOI10.1111/bor.12201
AbstractThe relationships amongst modern pollen assemblages, vegetation, climate and human activity are the basis for reconstructing palaeoenvironmental changes using pollen records. It is important to determine these relationships at regional scales due to the development of vegetation under different climatic conditions and human activities. In this paper, we report on an analysis of modern pollen assemblages of 31 surface lake samples from 31 lakes (one sample per lake) on the southwestern Tibetan Plateau where the knowledge of modern pollen and their relationships with vegetation, climate and human activities is insufficient. The region includes five vegetation zones: sub- alpine shrub steppe, alpine steppe, alpine meadow and steppe ecotone, mountain desert and alpine desert. The lakes span a wide range of mean annual precipitation (50- 500 mm) and mean annual temperature (-8 to 6 degrees C). Modern pollen assemblages from our samples mainly consist of herb taxa (Artemisia, Cyperaceae, Poaceae, Chenopodiaceae, etc.) and some tree taxa (Pinus, Fagaceae, Alnus, etc.). The results indicate that modern pollen assemblages are able to reflect the main vegetation distribution. Redundancy analysis for the main pollen types and environmental variables shows that precipitation is the leading factor that influences the pollen distribution in the study area with the first axis capturing 13.7% of the variance in the pollen data set. The Artemisia/ Chenopodiaceae ratio is valid for separating the desert component (< 2) from the steppe and other vegetation zones (> 2) but is unable to distinguish moisture variations. The Artemisia/ Cyperaceae ratio is able to identify meadows (< 1) and steppes (> 1) and can be used as a moisture index on the southwestern Tibetan Plateau. Our results show that an appropriate range is needed for a modern pollen data set in order to perform pollen- based quantitative climate reconstructions in one region. It is essential to perform modern studies before using pollen ratios to reconstruct palaeovegetation and palaeoclimate at a regional scale.
Subject Area自然地理学
WOS IDWOS:000398048200007
Language英语
Indexed BySCI
KeywordQAIDAM BASIN QUANTITATIVE RECONSTRUCTION CLIMATE RECONSTRUCTIONS HOLOCENE VEGETATION ALPINE VEGETATION SOURCE AREA CHINA MOUNTAINS LAST MONGOLIA
WOS Research AreaPhysical Geography; Geology
WOS SubjectGeography, Physical; Geosciences, Multidisciplinary ; Physical Geography; Geology
Cooperation Status国内
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8306
Collection图书馆
Corresponding AuthorMa, QF
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res ITP, Key Lab Tibetan Environm Changes & Land Surface P, TEL, Beijing 100101, Peoples R China.
2.CAS Ctr Excellence Tibetan Plateau Earth Syst, Beijing 100101, Peoples R China.
3.Chinese Acad Sci, Nanjing Inst Geol & Paleontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China.
Recommended Citation
GB/T 7714
Ma, QF ,Zhu, LP ,Lu, XM ,et al. Modern pollen assemblages from surface lake sediments and their environmental implications on the southwestern Tibetan Plateau[J]. BOREAS,2017,46(2):242-253.
APA Ma, QF .,Zhu, LP .,Lu, XM .,Wang, Y .,Guo, Y .,...&Ma, QF.(2017).Modern pollen assemblages from surface lake sediments and their environmental implications on the southwestern Tibetan Plateau.BOREAS,46(2),242-253.
MLA Ma, QF ,et al."Modern pollen assemblages from surface lake sediments and their environmental implications on the southwestern Tibetan Plateau".BOREAS 46.2(2017):242-253.
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