这里,描述了兰州市空气中微生物群落的分类组成和季节动态,中国西北地区。在两种滤膜(石英和PTFE)中研究了长达一年的样品。据报道,PTFE中的微生物负荷高于石英过滤器中的微生物负荷。据报道,两种过滤器的春季和夏季细菌负荷比冬季和秋季减少了一倍。真菌负荷在冬季最低,在秋季最高,其次是夏天。微生物群落包括放线菌和变形菌,子囊,和担子菌为主要成分。来自Gammaproteobacteria的成员的最大丰度,在PTFE膜上研究了所有季节的柯里细菌和梭菌,其次是,Erysipelotrichia,阴性和梭杆菌。放线菌和芽孢杆菌的成员在春季和冬季表现出更高的丰度,秋天的比例很小。梭菌的成员,γ变形杆菌,芽孢杆菌,放线菌在所有季节的石英过滤器上都显示出最大的丰度。同样,在PTFE上,真菌包括杆菌属和银孢菌属占优势,其次是酵母在夏季和冬季。结果表明,PM2.5、SO42-、NO2-,Na+,EC,和OC是影响季节性微生物群落的重要环境参数。然而,微生物组与环境的关系无法确定,因为环境因素是可变的,而且是相互关联的。
Here, the taxonomical composition and seasonal dynamics of airborne microbial communities were described in the urban city of Lanzhou, Northwest
China. Year-long samples were studied in two filter membranes (Quartz and PTFE). Higher microbial loads were reported in the PTFE than in the quartz filter. Onefold decrease was reported in bacterial loads in spring and summer than winter and autumn for both filters. The fungal loadings were lowest during winter and highest during autumn, followed by summer. The microbial communities included Actinobacteria and Proteobacteria, Ascomycota, and Basidiomycota as major components. Maximum abundance of the members from Gammaproteobacteria, Coriobacteria and Clostridia were studied in all seasons on PTFE membrane, followed by, Erysipelotrichia, Negativicutes and Fusobacteria. Members of Actinobacteria and Bacilli showed higher abundance in spring and winter, with a small proportion during autumn. Members of Clostridia, Gammaproteobacteria, Bacilli, and Actinobacteria showed maximum abundance on the quartz filter in all the seasons. Similarly, on the PTFE, fungi including Dothideomycetes and Agaricomycetes were dominant, followed by Saccharomycetes during summer and winter. The result showed that PM2.5, SO42-, NO2-, Na+, EC, and OC are important environmental parameters influencing the seasonal microbial community. However, the relation of the microbiome with the environment cannot be confidently defined because the environmental factors are changeable and yet interrelated.