摘要
This paper studied high-resolution sedimentary pollen sequence (1.5 yr/e) of Wanghu Lake, in the middle reach of Yangtze River, and analyzed the relationships of changes in pollen types and contents, sediment granularity, and climate-hydrology features during the past hundred years when the lake turned from an open water system into closed basin. The author found synchronous changes among sedimentary granularity and pollen with precipitation and river discharge which all experienced 3~4 years and 9~11 years cycles in the time series, suggesting sedimentation responding to climate changes. This study may provide scientific basis to reconstruct past environmental changes using sediment and pollen records, and to understand bio-sedimentology dynamics in the lake sediments.