Abstract：
Rapid urbanization leads to drastic environmental changes, directly or indirectly affecting the structure and function of soil microbial communities. However, the ecological response of soil microbes to environmental stresses has not yet been fully explored. In this study, we used high-throughput sequencing to analyze the assembly mechanism and driving factors of soil microbial community under environmental stresses. The results indicated that environmental stresses significantly affected soil properties and the levels of beryllium, cobalt, antimony, and vanadium contamination in soil generally increased from the suburban areas toward the city core. The composition and distribution of soil microbial communities demonstrated clear differences under different levels of environmental stress, but there was no significant difference in microbial diversity. Random forest and partial least squares structural equation modeling results suggested that multiple factors influenced microbial diversity, but antimony was the key driver. The influence of environmental stress led to deterministic processes dominating microbial community assembly processes, which promoted the regional homogenization of soil microbes. Therefore, this study provides new insights into urban soil microbial management under environmental stresses.
摘要：
快速的城市化导致剧烈的环境变化，直接或间接影响土壤微生物群落的结构和功能。然而,土壤微生物对环境胁迫的生态响应尚未得到充分探索。在这项研究中,利用高通量测序技术分析了环境胁迫下土壤微生物群落的组装机制和驱动因素。结果表明，环境胁迫显著影响土壤性质和铍含量，钴,锑,土壤中的钒污染通常从郊区向城市核心增加。土壤微生物群落的组成和分布在不同的环境胁迫下表现出明显的差异,但微生物多样性没有显著差异。随机森林和偏最小二乘结构方程模型的结果表明,多种因素影响微生物多样性,但锑是关键驱动因素.环境压力的影响导致决定性过程主导微生物群落组装过程，促进了土壤微生物的区域均质化。因此,这项研究为环境压力下的城市土壤微生物管理提供了新的见解。
