古植被盖度定量重建对于理解人类活动与植被演化之间关系，研究人类对地球系统的影响具有重要作用。本项目计划在巢湖流域开展古植被定量化重建工作，研究植被演化及其动力机制（自然因素和人类活动的各自影响）。我们将使用景观重建法和多场景重建方法研究巢湖流域现代植被和花粉之间关系，通过湖泊钻孔沉积物的年代学和孢粉学分析获得全新世以来高分辨率的花粉数据集，使用定量重建方法恢复古植被变化（重点是植被盖度）；利用历史文献重建历史时期巢湖流域的土地覆盖数据，以此评估两种方法重建的精度和准确性，并选择合适的重建数据；根据古植被重建结果，综合多学科资料，研究巢湖流域古植被演化与环境演变的互动影响。该项目研究结果将为研究区域人类活动、气候变化和植被变化之间的关系提供重要的例证。

The quantitative reconstruction of paleovegetation coverage plays an important role in understanding the relationship between human activities and vegetation evolution, as well as in studying the impact of human beings to the earth system. This project plans to carry out the quantitative reconstruction of paleovegetation coverage in the Chaohu basin based on high resolution pollen data from lake sediments and to research the vegetation evolution and its mechanism (natural factors and human activities) since the Holocene. We will use Multiple Scenario Approach and Landscape Reconstruction Algorithm to discuss the relationship between modern vegetation and pollen in the Chaohu lake catchment, and use these approaches to get the quantitative reconstructions of paleovegetational changes (mainly the paleovegetation coverage). At the same time, we will use the historical documents to reconstruct the land-cover data in the Chaohu lake catchment within the historical period, which can evaluate the precision and accuracy of the reconstructions from two approaches, and select out the better approach and reconstructed data. Finally, we will study the mechanism of paleovegetation in Chaohu basin and its environmental significance according to the reconstruction of paleovegetation and the multiple scientific data. This project will provide important reference to research the relationship among regional human activities, climate change and vegetation change.