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《Acta Micropalaeontologica Sinica》 2015-02
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POLLEN RECORDS OF THE YUXI CULTURE SITE IN THE THREE GORGES RESERVOIR AREA,YANGTZE RIVER

CUI Anning;MA Chunmei;ZHU Cheng;BAI Jiujiang;ZHANG Wenqing;School of Geographic and Oceanographic Sciences &Institute for Climate and Global Change Research,Nanjing University;Jiangsu Collaborative Innovation Center for Climate Change;Institute of Cultural Heritage in Chongqing;Institute of Hydrogeology Engineering and Geological Method,China Geological Survey Bureau;  
According to the sporopollen analysis of 53 layers samples and 9surface samples at the Yuxi site,Chongqing,SW China,we have discovered that the the pollen assemblages mainly dominanted by trees and shrubs,upland herbs followed,ferns the least in Yuxi cultural period.Most of trees and shrubs are Pinus,Betulaand Quercus,Chenopodiaceae.Artemisiacontents are higher in the herbs;Fern spore is given priority to Pteris.The pollen spectrum reflects a relatively humid climate condition.Surface soil pollen is dominanted by Pinus,which is super representative.As a pioneer plant,Pinus shows obvious growth advantage in community succession.Surface soil pollen assemblages is congruent with local vegetation conditions.Combined with 14 C dating and other climatic proxies,it is recognized that the value of Rb/Sr and the percentage of trees and shrubs are markedly increased in the upper,the 4— 8layers and the bottom sludge layer of the section,which reflects that sludge layer are flood markers and flood can enrich the sporopollen to a certain extent.Interactive Cultural and sludge layers presented in the section at the Yuxi site indicates that periodic flooding events interrupted the continuity of human activity.
【Fund】: 国家自然科学基金(批准号:41371202 41171163);; 中国科学院战略性先导科技专项子课题(XDA05130502);; 江苏高校优势学科建设工程资助项目;; 中央高校基本科研业务费专项资金共同资助
【CateGory Index】: Q913.84
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