贺兰山不同植被类型土壤微生物呼吸及微生物多样性对全球气候变化的响应

全球气候变化已成为最受关注的热点议题，但其对高山土壤微生物多样性的影响以及微生物呼吸的热适应性机制尚不明确。本项目将基于贺兰山干旱山地森林生态系统温度梯度带的土壤置换试验，运用生态代谢理论，研究气候变暖（土壤下移）和气候变冷（土壤上移）条件下土壤微生物呼吸与群落结构变化特征，建立功能基因与土壤微生物呼吸强度的定量关系，探讨不同海拔土壤微生物多样性分布格局与复杂的环境之间的关系，揭示土壤微生物群落演替及功能基因组对气候条件变化的响应机制，从而为干旱风沙区高山土壤微生物功能多样性对气候变化的响应提供理论依据。

Global climate change has become the most concerned hot topic, but its impact on the microbial diversity of Alpine soil and the thermal adaptation mechanism of microbial respiration are not clear. Based on the experiment of soil replacement in the temperature gradient zone of forest ecosystem in the arid mountainous area of Helan Mountains, this project will use the theory of ecological metabolism to study the characteristics of soil microbial respiration and community structure change under the conditions of climate warming (soil moving down) and climate cooling (soil moving up), establish the quantitative relationship between functional genes and soil microbial respiration intensity, and explore the soil micro life at different altitudes The relationship between the distribution pattern of soil microbial diversity and the complex environment reveals the response mechanism of soil microbial community succession and functional genome to the change of climate conditions, so as to provide a theoretical basis for the response of Alpine soil microbial functional diversity to climate change in arid and windy sand areas.