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综合分析根据鹤庆深钻孢粉数据计算的多种孢粉多样性指数,认为鹤庆地区2.78Ma以来,植物多样性分别在2.729~2.608,1.176~0.342Ma和自0.118Ma以来快速增加、波动幅度和波动频率也明显变大,而其他时期植物多样性则相对较低、波动较小.对古植物多样性与古环境关系的进一步探讨显示,鹤庆地区的古植物多样性取决于周围山地垂直植被带的增减与各植被带组成成分的丰富程度,并受控于山体构造抬升与气候变化的幅度.2.729~2.608Ma期间的植物多样性高值响应于此阶段的山体强烈抬升;而开始于1.176Ma左右的植物多样性大大增加、波动幅度和波动频率明显变大是对中更新世气候转型的明显响应;随后一次发生在0.991Ma附近的植物多样性及其波动幅度与频率进一步增加,则可能是受中更新气候转型与构造抬升的叠加影响;自0.118Ma以来的植物多样性增加,可能指示了西南季风增强,湿润的气候更适合多种植物的生长.
Based on the comprehensive analysis of various sporopollen diversity indices calculated from the data of Heqing deep-drilling sporopollen, the diversity of the plant diversity in Heqing area since 2.778 ~ 2.78Ma, 2.716 ~ 0.342Ma and 0.118Ma, respectively, increased rapidly and fluctuated The amplitudes and the frequency of fluctuation are obviously larger, while the plant diversity in other periods is relatively lower and the fluctuation is smaller.Further study on the relationship between ancient plant diversity and paleoenvironment shows that the ancient plant diversity in Heqing area is determined by the surrounding mountainous areas The increase of vegetation belts and the abundance of vegetation belts are controlled by the tectonic uplift of mountain structure and the extent of climate change. The high values of plant diversity during the period from 2.2929 to 2.608 Ma are strongly uplifted by the mountains at this stage. The plant diversity, which began at 1.176Ma, increased greatly and the frequency of fluctuation and fluctuation obviously increased, which was a clear response to the mid-Pleistocene climatic transition. The plant diversity and its fluctuation range and frequency in the subsequent occurrence of 0.991Ma were further increased , It may be due to the superposition effect of the intermediate update of climate change and tectonic uplift; the increase of plant diversity since 0.118 Ma may indicate the enhancement of southwest monsoon, Wet climate is more suitable for a variety of plant growth.