青岛冬季霾天不同粒径生物气溶胶中细菌群落特征研究

发布时间：2018-05-31 03:56

本文选题：霾 + SrRNA　；参考：《中国环境科学》2017年08期

【摘要】：采用Illumina高通量测序方法对青岛冬季一次霾过程中大气生物气溶胶中细菌群落结构特征进行了研究.测序获得的807104条序列以97%的相似水平可划分为874个OTUs,其中有344个OTUs注释到属水平.结果表明,霾发生时,大气生物气溶胶中细菌群落结构和多样性变化显著.由非霾到重度霾天过程中,细菌群落丰富度和多样性逐渐降低,且细菌群落丰富度在不同粒径颗粒物上的差异逐渐减小,多样性在不同粒径颗粒物上的差异逐渐增大.非霾天优势菌属为假单胞菌属(Pseudomonas)、韦荣氏球菌属(Veillonella)和鞘氨醇单孢菌属(Sphingomonas);霾发生后,优势菌属转变为鞘氨醇单孢菌属(Sphingomonas).此次霾发生过程中,浓度升高的鞘氨醇单孢菌属(Sphingomonas)和新检出的皮生球菌属(Dermacoccus)、梭菌属(Fusobacterium)、纤毛菌属(Sneathia)、黄杆菌属(Flavobacterium)为条件致病菌,可能存在健康风险.
[Abstract]:The characteristics of bacterial community structure in atmospheric biological aerosol during a haze in winter in Qingdao were studied by Illumina high-throughput sequencing method. The 807104 sequences obtained by sequencing can be divided into 874 OTUs at a similar level of 97%, of which 344 OTUs are annotated to generic level. The results showed that the bacterial community structure and diversity in atmospheric biological aerosols changed significantly when haze occurred. During the period from non-haze to severe haze, the bacterial community richness and diversity gradually decreased, and the differences of bacterial community richness in different particle size gradually decreased, and the diversity in different particle size gradually increased. Pseudomonas pseudomonas, Veillonellaand sphingomonas and Sphingomonas sphagoides were the dominant genera of non-haze. After haze, the dominant bacteria were transformed into Sphingomonas sphagoides. In the process of haze, Sphingomonas), Dermacoccusis, Fusobacterium, Sneathia and Flavobacterium were the conditioned pathogens.
【作者单位】：中国海洋大学环境科学与工程学院;海洋环境与生态教育部重点实验室;青岛海洋科学与技术国家实验室海洋生态与环境科学功能实验室;
【基金】：国家自然科学基金项目(41375143) 教育部新世纪优秀人才支持计划(NCET-13-0531)
【分类号】：X513

【相似文献】