Comparison on PM2.5 and Surface Soil Bacterial Community Structure among Different Urban Environmental Spaces
To investigate the composition and sources of airborne microorganisms in different environmental spaces,this study collected atmospheric fine Particulate Matter(PM2.5)and topsoil samples from eight typi-cal human activity environments in both urban and suburban areas of Guilin.High-throughput sequencing was employed to analyze the bacterial community structure.The results revealed that the bacterial communi-ty structure of PM2.5 samples varied little among different environmental spaces,while significant differences were observed in topsoil samples between urban and suburban areas.In addition,there were considerable differences between PM2.5 and topsoil samples from the same sampling points.The predominant bacterial phyla in both PM2.5 and topsoil were Proteobacteria,Actinobacteria,Chloroflexi,Bacteroidetes and Firmi-cutes,with the total relative abundance exceeding 80％.The microbial community differences between envi-ronmental spaces indicated substantial effects of human activities on these communities.Additionally,the dominant bacterial genera varied in different environments,correlating with environment characteristics and bacterial ecological functions.The dominant genera in PM2.5 samples included Allorhizobium-N eorhizobium-Pararhizobium-Rhizobium,Pseudolabrys,Methylobacterium and Acinetobacter,and those in topsoil samples comprised Sphingomonas,Deinococcus,Massilia and Subgroup_6 under Acidobacteria.
PM2.5topsoilbacterial community structuresource trackhigh-throughput sequencing
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