Soil microbial communities reflect changes associated with City construction in Northwest China
摘要
To investigate the impact of anthropogenic disturbances on soil microbial diversity during urbanization, topsoil samples were collected from both undisturbed and anthropogenically disturbed sites in the Hemaquan New District of Wulumuqi, China, during spring and summer. The physicochemical properties of these soils were then analyzed. The soil samples exhibited alkaline pH with low moisture and nutrient levels. Urban construction had varying effects on soil microbial diversity: urban greening appeared to enhance and sustain soil microbial diversity, while civil engineering activities led to a reduction in diversity. The dominant bacterial phyla, Actinomycetota and Pseudomonadota, were prevalent in the soil samples. In contrast, Acidobacteria, Verrucomicrobiota, and Chloroflexota were highly abundant in their undisturbed habitats. The abundance of the dominant fungal phylum, Ascomycota, significantly increased in the anthropogenically disturbed samples during summer. Basidiomycota were more abundant in the original summer habitat samples. At the genus level, RB41, Rubrobacter, Candidatus_Udaeobacter, Neocamarosporium, Mortierellomycota, and Alternaria were prevalent. Bacteria adapted to anthropogenic disturbances and seasonal variations by altering species abundance at the phylum and genus levels, while fungi adapted through changes at the genus level. Soil pH and water content were the primary physicochemical factors influencing soil microorganisms in the new district. Different types of anthropogenic disturbances during urban construction had distinct effects on soil microorganisms, with greening promoting soil microbial diversity and civil construction negatively impacting soil microorganisms.