华南山地植物避难所末次冰期以来的植被演替与气候响应

华南山地是我国生物多样性热点地区，其分布有全世界上面积最大、类型最复杂和古老的亚热带常绿阔叶林。该区域植被类型的第四纪时空分布格局、历史迁移和扩散规律等研究不仅在古气候学、植物地理和分类学等方面具有十分重要的科学意义，同时可以为预测全球变暖情景下未来的植被生态变化估算和模拟提供依据。本研究在武夷山脉、罗霄山脉及其邻近地区钻取一系列的岩芯钻孔，进行高分辨率测年，通过孢粉分析、碳同位素、腐殖化度、碳屑和粒度分析等综合方法，依据现代表土孢粉数据与植被和气候的关系，定量揭示华南山地末次冰期以来植被垂直带下降过程和幅度，以及在冰后期植被的分布格局、迁移路径和扩散规律。同时，根据高分辨率孢粉分析结果运用最佳类比法定量重建古气候，同时与其它高分辨率气候指标进行对比，阐明华南山地植被在冰期-间冰期旋回和短尺度气候事件的演替过程及其冰后期地理迁移过程研究。

Southern China is the most important region where there are complex, broadest and primitive subtropical evergreen broadleaved forests in the world. The temporal and spatial distribution, historical migration and spreading pattern of vegetation types are the important topics of the study on palaeoclimate change and biogeography, which will provide abundant data and validate the models for biome simulation under the future climate warming scenarios. The present study is to drill several cores in subtropical area. Base on high resolution AMS 14C dating, we use pollen analysis, carbon isotope, humification, charcoal and grain size analysis to quantitatively evaluating the spatial distribution, vertical shifts, migration and spreading pathways of vegetation types since the last glacial. The modern analogue technique is used to quantitative climate reconstruction based on pollen analysis, which are compared with other high-resolution climate proxies. This research will demonstrate the vegetation response on climate changes and the glacial-interglacial cycle.