中文摘要：

通过对浙江萧山白马湖地区BMH全新世钻孔沉积物中硅藻及其主成分进行分析，揭示研究区96007230ealaBP期间与海平面相关的沉积环境变化。结果显示9600-8950calaBP期间，硅藻组合以淡水种为优势种，未出现海水种，反映研究区为淡水沼泽环境，没有受到海水的影响；8950-8600calaBP期间，硅藻组合中半咸水种出现且含量逐渐增加，但仍以淡水种为主要优势种，表明研究区受到间歇性潮汐或风暴潮的影响，对应于高潮滩一潮上带的沉积环境；半成水种和海水种含量在8600-8300calaBP期间显著增加，而淡水种的含量明显降低，说明当时海平面显著上升，白马湖地区处于潮下带；在8300—7230calaBP段的沉积物中未发现硅藻壳体，可能与当时研究区干涸成陆或埋藏条件有关，对应于跨湖桥文化时期（8000—7000calaBP）。白马湖地区硅藻记录的8600—8300calaBP海平面上升事件，在同时期的长江三角洲、东南亚乃至全球其他很多地方均有记录，可能与该时期劳伦太德冰盖融水事件（LaurentideIceSheet）以及Agassiz—Ojibway湖溢水事件所导致的全球海平面快速上升有关。

英文摘要：

A 20. 9 m-long sediment core named BMH was collected near the Kuahuqiao archaeological site, which is located in the Ningshao plain, Zhejiang Province. The diatom assemblages of this core revealed the sedimentary environmental changes associated with fluctuations of relative sea- level during the early to mid-Holocene in the Ningshao plain. The diatom records show that freshwater species were dominant during 9 600- 8 950 cal a BP, whereas marine species were rare or absent, indicating a freshwater swamp in the Baima Lake area, with less influence of sea water.