干旱区生态环境知识资源中心(Arid): Modern pollen assemblages from surface lake sediments in northwestern China and their importance as indicators of vegetation and climate

Arid

	Modern pollen assemblages from surface lake sediments in northwestern China and their importance as indicators of vegetation and climate
	Qin Feng; Zhao Yan; Li Quan; Cai Maotang
来源期刊	Science China. Earth Sciences
ISSN	1674-7313
出版年	2015
卷号	58 期号:9 页码:1643-1655
英文摘要	The modern pollen assemblages of surface lake sediments and topsoils in northwestern China were studied to understand the relationship of modern pollen data with contemporary vegetation and climate, and the differences between the pollen assemblages of surface lake sediments and topsoils. The results show that Chenopodiaceae and Artemisia are dominant elements in the pollen assemblages of northwestern China. Additionally, Ephedra, Cyperaceae, Asteraceae, Poaceae, Picea, Pinus, and Betula are also important pollen taxa. Both pollen assemblages and principal component analysis indicate that pollen data from surface lake sediments and topsoils can be used to differentiate the main vegetation types of this region (desert, steppe, meadow and forest). However, differences exist between modern pollen assemblages of the two types of sediments due to the different relevant source areas of pollen and degrees of pollen preservation. For example, the larger relevant source area of surface lake sediment results in a higher abundance of Betula in pollen assemblage from surface lake sediment, whereas the tendency to disintegrate thin-walled pollen types in topsoil leads to a higher proportion of resistant pollen, such as Asteraceae. Linear regression analysis indicates that the Artemisia/Chenopodiaceae (A/C) ratio in pollen assemblages of surface lake sediments can be used to indicate humidity changes in the study area. However, the A/C ratio in topsoils should be used carefully. Our results suggest that pollen data from surface lake sediments would be better references for interpreting the fossil pollen assemblages of lake cores or lacustrine profiles.
英文关键词	modern pollen assemblage surface lake sediment topsoil vegetation climate northwestern China
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Paleontology
CSCD记录号	CSCD:5530155
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335555
作者单位	Qin Feng, Institute of Geographic Sciences and Nature Resources Research, Chinese Academy of Sciences, Key Laboratory of Land Surface Pattern and Simulation,Chinese Academy of Sciences, Beijing 100101, China.; Zhao Yan, Institute of Geographic Sciences and Nature Resources Research, Chinese Academy of Sciences, Key Laboratory of Land Surface Pattern and Simulation,Chinese Academy of Sciences, Beijing 100101, China.; Li Quan, Institute of Geographic Sciences and Nature Resources Research, Chinese Academy of Sciences, Key Laboratory of Land Surface Pattern and Simulation,Chinese Academy of Sciences, Beijing 100101, China.; Cai Maotang, Institute of Geographic Sciences and Nature Resources Research, Chinese Academy of Sciences, Key Laboratory of Land Surface Pattern and Simulation,Chinese Academy of Sciences, Beijing 100101, China.
推荐引用方式 GB/T 7714	Qin Feng,Zhao Yan,Li Quan,et al. Modern pollen assemblages from surface lake sediments in northwestern China and their importance as indicators of vegetation and climate[J],2015,58(9):1643-1655.
APA	Qin Feng,Zhao Yan,Li Quan,&Cai Maotang.(2015).Modern pollen assemblages from surface lake sediments in northwestern China and their importance as indicators of vegetation and climate.Science China. Earth Sciences,58(9),1643-1655.
MLA	Qin Feng,et al."Modern pollen assemblages from surface lake sediments in northwestern China and their importance as indicators of vegetation and climate".Science China. Earth Sciences 58.9(2015):1643-1655.