晚更新世以来浙江余姚地区植被变化及人类活动  

VEGETATION AND HUMAN ACTIVITY IN YUYAO(ZHEJIANG PROVINCE) INFERRED FROM THE SPORO-POLLEN RECORD SINCE THE LATE PLEISTOCENE

作　　者：李春海[1] 唐领余[2] 万和文[3] 王苏民[1] 姚书春[1] 张殿发[4] 

机构地区：[1]湖泊与环境国家重点实验室,中国科学院南京地理与湖泊研究所,南京210008 [2]中国科学院南京地质古生物研究所,南京210008 [3]安徽大学生命科学学院,合肥230039 [4]宁波大学建筑工程与环境学院,宁波315211

出　　处：《微体古生物学报》2009年第1期48-56,共9页Acta Micropalaeontologica Sinica

基　　金：国家自然科学基金项目(No .40572178,40730103);中国科学院重要方向项目(KZCX2-YW-338)资助

摘　　要：浙江余姚河姆渡镇7m钻孔的孢粉记录提供了晚更新世以来的植被变化及其反映的气候变化和人类活动的历史。在全新世海侵之前,研究区发育常绿落叶阔叶混交林。全新世早中期,海侵发生,植被由亚热带针阔叶混交林发展为常绿落叶阔叶混交林,碳屑和禾本科(≥35μm)花粉的增高说明,可能在河姆渡文化之前,研究区已经有人类活动。7cal.kyrBP之后,高含量的禾本科(≥35μm)花粉表明钻孔点的临近地区有水稻种植。亚热带与温带乔木花粉的比值(sub/tem)显示,在8cal.kyrBP之前的海侵期间,浙江余姚地区气候最温暖湿润;7.5—5.86cal.kyrBP期间,温度低于海侵期但是仍然属于全新世暖期,温度高于现在;5.86cal.kyrBP之后,温度下降;4cal.kyrBP之后温度进一步下降,接近现在。The sporo-pollen record of a 7-m-long sediment core collected from Hemudu town （Yuyao county, Zhejiang Province） provides information on vegetation, climate change and human activity since the Late Pleistocene. Evergreen and deciduous broadleaf mixed forest developed before the Holocene transgression. The vegetational change, from the subtropical mixed confer-broadleaf forest to evergreen and deciduous broadleaf mixed forest, occurred during the early-middle Holoeene. High values of micro-charcoal and increasing of Gamineae （≥35 μm） pollen during this period may suggest human activity before the Hemudu Culture. High percentage Gamineae （≥35 μm） indicates rice culture activity near the core site after 7 cal. kyr BP. The temperature is reflected by the ratios of sub/tep （subtropical tree species/temperate tree species pollen）, and the highest temperature occurred during the early Holocene. Although the temperature decreased but was still warmer than the present during 7.5-5.86 cal. kyr BP, then dropped after 5.86 cal. kyr BP and further decreased and was nearly similar to the present after 4 cal. kyr BP.

关 键 词：孢粉 河姆渡文化 气候变化 全新世 余姚 浙江 

分 类 号：Q914[天文地球—古生物学与地层学] Q981[生物学—古生物学]