干旱区生态环境知识资源中心(Arid): Progress, problems and prospects of palynology in reconstructing environmental change in inland arid areas of Asia

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	Progress, problems and prospects of palynology in reconstructing environmental change in inland arid areas of Asia
	Zhao Yongtao; Miao Yunfa; Lei Yan; Cao Xianyong; Xiang Mingxing
来源期刊	Sciences in Cold and Arid Regions
ISSN	1674-3822
出版年	2021
卷号	13 期号:4 页码:271-291
英文摘要	Studying the climatic and environmental changes on different time scales in inland arid regions of Asia can greatly improve our understanding of climatic influences for the Qinghai-Tibet Plateau in the context of global change. Pollen, as a remnant of seed plants, is sensitive to environmental factors including precipitation, temperature and altitude, and is a classic proxy in environmental reconstruction. In the last two decades, great progress in the application of palynology to inland areas of Asia has highlighted the role of palynology in paleoclimatic and paleoenvironmental research. The main progress is as follows. (1) On the tectonic time scale of the late Cenozoic, the palaeoclimatological sequence has been established on the basis of pollen percentage, concentration and taxon. Pollen data have revealed a continuous enhancement of drought in the inland arid region of Asia, in contrast to evidence acquired based on other proxies. (2) In the late Quaternary, an increase in herbaceous plants further supports the intensification of drought associated with global cooling. In more detail, the palynological record shows a glacial-interglacial pattern consistent with changes in global ice volume. (3) The Holocene pollen record has been established at a high resolution and across a wide range of inland areas. In general, it presents an arid grassland environment in the early Holocene, followed by the development of woody plants in the mid- to late-Holocene climate optimum. This pattern is related to moisture changes in areas dominated by the westerlies. There are also significant regional differences in the pattern and amplitude of vegetation response to the Holocene environment. (4) Modern pollen studies based on vegetation surveys, meteorological data and statistics show that topsoil palynology can better reflect regional vegetation types (e. g., grassland, meadow, desert). Drier climates yield higher pollen contents of drought-tolerant plants such as Chenopodioideae, Ephedra, and Nitriaria, while contents of Artemisia and Poaceae are greater under humid climates. Besides these achievements, problems remain in palynological research: for example, pollen extraction, identification, interpretation, and quantitative reconstruction. In the future, we encourage strengthened interdisciplinary cooperation to improve experimental methods and innovation. Firstly, we should strengthen palynological classification and improve the skill of identification; secondly, laboratory experiments are needed to better constrain pollen transport dynamics in water and air; thirdly, more rigorous mathematical principles will improve the reliability of reconstructions and deepen the knowledge of plant geography; and finally, new areas and methods in palynology should be explored, for example DNA, UV-B and isotopic analysis. It is expected that palynology will continue to develop, and we hope it will continue to play an important role in the study of past climatic and environmental changes.
英文关键词	Palynology inland arid areas Late Cenozoic Quaternary Holocene modern environmental processes
类型	Article
语种	英语
收录类别	CSCD
WOS类目	Geology
CSCD记录号	CSCD:7054381
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377481
作者单位	Zhao Yongtao, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Key Laboratory of Desert and Desertification, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Miao Yunfa, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences;;University of Chinese Academy of Sciences, Key Laboratory of Desert and Desertification, Chinese Academy of Sciences;;, Lanzhou;;, Gansu;;Beijing 730000;;100049.; Lei Yan, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences;;University of Chinese Academy of Sciences, Key Laboratory of Desert and Desertification, Chinese Academy of Sciences;;, Lanzhou;;, Gansu;;Beijing 730000;;100049.; Xiang Mingxing, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences;;University of Chinese Academy of Sciences, Key Laboratory of Desert and Desertification, Chinese Academy of Sciences;;, Lanzhou;;, Gansu;;Beijing 730000;;100049.; Cao Xianyong, University of Chinese Academ...
推荐引用方式 GB/T 7714	Zhao Yongtao,Miao Yunfa,Lei Yan,et al. Progress, problems and prospects of palynology in reconstructing environmental change in inland arid areas of Asia[J],2021,13(4):271-291.
APA	Zhao Yongtao,Miao Yunfa,Lei Yan,Cao Xianyong,&Xiang Mingxing.(2021).Progress, problems and prospects of palynology in reconstructing environmental change in inland arid areas of Asia.Sciences in Cold and Arid Regions,13(4),271-291.
MLA	Zhao Yongtao,et al."Progress, problems and prospects of palynology in reconstructing environmental change in inland arid areas of Asia".Sciences in Cold and Arid Regions 13.4(2021):271-291.