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Morphological Characteristics and Environmental Implications of phytoliths in topsoils from Different Vegetation Zones on Northern Slope of Changbai Mountains,China

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Chinese Geographical Science 2010年第6期20卷 506-512页

作者： QIAO Zhihe JIE Dongmei LIU Hongmei GE Yong ZHANG Hongyan College of Urban and Environmental Science Northeast Normal UniversityChangchun 130024China Daqing Normal University Daqing 163001China

The Changbai Mountains,located in the temperate monsoon climate zone of East Asia,is an ideal loca-tion for the research on timberline response to global *** this study,the topsoils were collected from different vertical vegetation zones on the northern slope of the Changbai Mountains,Northeast China in August 2009,and phytoliths in the soil samples were extracted by using wet oxidation method and identified with Motic 2.0 microscope in *** results show that phytoliths are abundant in the topsoils of the study *** herbal phytoliths are primarily composed of elongated,tooth-shaped,point-shaped and hat-shaped phytoliths,as well as a small amount of fan-shaped and square-shaped *** elongated,tooth-shaped,point-shaped and hat-shaped phytoliths are representative of cold climate,while fan-shaped and square-shaped ones are representative of warm and humid *** the conifer broadleaved mixed forest zone,coniferous forest zone and broadleaf forest zone,there are close correlations between vegetation and woody phytoliths in the topsoils,indicating that the woody plants of a region can be reconstructed from the woody phytolith assemblages in the ***,the topsoil phytolith assemblages can also be used to reconstruct the understory herbs *** phytolith assemblages in the topsoils of the forest community and herbal community differ significantly,which can help indicate the historical location of the timberline.

关键词： topsoil phytolith timberline environmental implication vertical vegetation zones Changbai Mountains

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