天山北坡奇台和呼图壁两地记录的全新世期间垂直植被带变化研究

山地在全球生态环境中占据着重要的地位，全球变化在深刻地影响着山地垂直植被，在干旱半干旱区尤其明显。天山垂直植被带的变化对当地的生产生活产生了巨大冲击，研究天山全新世垂直植被变迁和气候环境的关系，是理解全球变化背景下垂直植被带响应的重要途径。天山北坡垂直植被发育较好且海拔差异显著，是研究天山垂直植被和气候变化关系的理想区域。尽管我们和别的学者曾经对全新世期间天山垂直植被曾经进行过重建，但仅限于个别地点的初步推测，还没有进行过系统的重建。该项目拟通过奇台和呼图壁两条从山麓荒漠带直至山顶冰雪带的纵贯面，重建全新世垂直植被带的变化。每个纵贯面主要基于孢粉、土壤有机质含量等的变化，通过3个位于不同海拔、不同植被带的剖面记录的整合，重建垂直植被带的变化；再通过两个纵贯面对比分析，避免局地性，深入理解气候变化与垂直植被带之间的关系。这可为全球变化前景下天山生态调控、绿色“一带一路”建设供基础科学支撑。

Mountains play an important role in the global ecological environment. Global changes have a profound impact on the vertical vegetation in mountains, especially in arid and semi-arid areas. The change of vertical vegetation in Tianshan Mountain has a great impact on human activities. To study the relationship between the Holocene vertical vegetation change and climate environment, is an important way to understand the response of vertical vegetation in the context of global change. The vertical vegetation on the northern slope of Tianshan is well developed and the altitude difference is significant. Thus it is an ideal area to study the relationship between the vertical vegetation and climate change. Although we and other scholars have reconstructed the vertical vegetation of the Tianshan Mountains during the Holocene, we have not reconstructed the vertical vegetation systematically, but only limited to the preliminary speculation of individual sites. The project plans to reconstruct the variation of Holocene vertical vegetation belts of each longitudinal plane, through the integration of multiple profile records based on the changes of pollen and soil organic matter content, , and through the comparison of two longitudinal planes analyze, to deeply understand the relationship between climate change and vertical vegetation belt. This will provide scientific foundation for the ecological regulation of Tianshan Mountains, for the construction of green Belt and Road in the context of global change.