中文摘要：

通过对巢湖湖心长8.0m的ACN钻孔沉积物的磁性参数和粒度组成进行测量,探讨了巢湖全新世以来的环境演变过程,经过与已有文献和考古资料的对比,分析了长江下游三大湖泊——巢湖、太湖、鄱阳湖的沉积物对全新世环境变化的指示意义,认为：（1）长江下游三大湖泊沉积物中记录的古气候信息与全球重大事件吻合较好.同一特征性气候变化过程在区域上存在差异;（2）全新世以来,巢湖经历的湖面涨缩过程以及突发事件比太湖和鄱阳湖更加剧烈,说明巢湖沉积物对气候环境的响应更加敏感.巢湖和太湖水域面积整体不断减少,鄱阳湖相反;（3）西北欧全新世中期ElmDecline事件对长江下游不一定普遍响应,4000aB.P.和3800aB.P.左右长江下游可能分别存在洪水事件和干旱事件.

英文摘要：

By analyzing the magnetic characteristics and the particle composition of the lacustrine sediment from the ACN drilled core（8m long）taken in the center of the Chao Lake,this paper has made a study on the environment change during the Holocene around the Chao Lake.In order to get whole understanding about the Holocene environment changes in the lower Yangtze River,the paper has made a comparison between the environment changes recorded by the Chao Lake,Tai Lake and Poyang Lake.The research results indicate（1）during the Holocene,the contracts and expands of the Chao Lake were more intensive than those in the Tai Lake and Poyang Lake;（2）the significant environment changes during the Holocene recorded by the three large lakes in the Lower Yangtze River coincide with those in the other places of the world,except ELM Decline event of the middle Holocene in northwestern Europe;（3）during 4000aB.P.to 3800aB.P.,there may exist flooding events and drought events.