Pollen-vegetation relationship and pollen preservation on the Northeastern Qinghai-Tibetan Plateau | |
Li, YC; Xu, QH; Yang, XL; Chen, H; Lu, XM | |
刊名 | GRANA |
2005-09-01 | |
卷号 | 44期号:3页码:160-171 |
ISSN号 | 0017-3134 |
DOI | 10.1080/00173130500230608 |
文献子类 | Article |
英文摘要 | Qinghai-Tibetan Plateau is one of the most sensitive areas to climate change of the earth, owing to its unique topographic features and ecosystem. Soil pollen analysis is an important component of palaeoecological research, while pollen preservation and the relationship between pollen and vegetation can influence the correct interpretation of fossil pollen spectra. In this paper, 36 pollen samples, which come from four meadows and two forest soil pollen profiles, have been analyzed to determine relationships between pollen and vegetation and pollen preservation on the northeastern Qinghai-Tibetan Plateau. The relationship between pollen and vegetation shows that the surface pollen assemblages can represent regional vegetation characteristics moderately, while Betula and Populus pollen is absent in the soil surface for Betula and Populus mixed forest. Artemisia, Chenopodiaceae, Ephedra, Pinus, Hippophae etc. are over-represented pollen taxa, Leguminosae, Ranunculaceae, Rosaceae, Gramineae etc. are under-represented pollen taxa. The study of pollen preservation indicates that pollen concentrations decrease with the increase of soil depths, more pollen taxa are present in surface soils than in deep levels, and more than 75% pollen grains will be lost from the surface soils to deep levels. Pollen sorting preservation function should be noticed. Artemisia and Chenopodiaceae can be preserved well and have higher pollen percentages in deeper levels. Cyperaceae and Populus are preserved worse, Populus pollen is absent and Cyperaceae has higher pollen percentages in the surface soil than in the deep levels. The high soil pH values are the most destructive factors for pollen preservation on the northeastern Qinghai-Tibetan Plateau. Pollen concentrations decrease sharply when the soil pH values are over 7.6. Downward leaching of pollen is unimportant in this study. |
WOS关键词 | SOURCE AREA ; ENVIRONMENTAL-CHANGES ; ALASHAN PLATEAU ; REPRESENTATION ; USA ; DEGRADATION ; FREQUENCIES ; PARAMETERS ; MOUNTAINS ; TAPHONOMY |
WOS研究方向 | Plant Sciences |
语种 | 英语 |
出版者 | TAYLOR & FRANCIS AS |
WOS记录号 | WOS:000233114800006 |
内容类型 | 期刊论文 |
源URL | [http://ir.iggcas.ac.cn/handle/132A11/65756] |
专题 | 中国科学院地质与地球物理研究所 |
通讯作者 | Xu, QH |
作者单位 | 1.Hebei Normal Univ, Coll Resources & Environm, Shijiazhuang 050016, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Hebei Inst Geog, Shijiazhuang 050011, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China |
推荐引用方式 GB/T 7714 | Li, YC,Xu, QH,Yang, XL,et al. Pollen-vegetation relationship and pollen preservation on the Northeastern Qinghai-Tibetan Plateau[J]. GRANA,2005,44(3):160-171. |
APA | Li, YC,Xu, QH,Yang, XL,Chen, H,&Lu, XM.(2005).Pollen-vegetation relationship and pollen preservation on the Northeastern Qinghai-Tibetan Plateau.GRANA,44(3),160-171. |
MLA | Li, YC,et al."Pollen-vegetation relationship and pollen preservation on the Northeastern Qinghai-Tibetan Plateau".GRANA 44.3(2005):160-171. |
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