摘要
为探究雾、霾、沙尘等多种天气下生物气溶胶中细菌群落结构特征,于2017年12月—2018年4月采集了青岛晴天和多种特殊天气下的大气生物气溶胶样品,运用16S rRNA高通量测序方法分析了样品中细菌群落结构。结果表明,在雾、霾、沙尘天均检测到对人体健康存在潜在危害的条件致病菌,其中变形菌门(Proteobacteria)均是优势细菌门,不受天气条件变化影响;霾天时其相对丰度最大。除此以外,沙尘和霾发生时,细菌群落结构显著变化,丰富度和多样性高于晴天,但随霾污染程度的加剧,群落丰富度和多样性下降;雾天多样性下降,丰富度变化不显著。在霾天,不同气团来源中细菌群落结构也存在显著差异。属水平上,霾天不动杆菌(Acinetobacter)和鞘氨醇单胞菌(Sphingomonas)占主导地位;雾天微球菌(Micrococcus)、副球菌(Paracoccus)和假单胞菌(Pseudomonas)占主导地位;沙尘天的优势菌为芽孢杆菌(Bacillus)。RDA分析显示O_(3)是影响菌群的主要环境因子。
In order to evaluate the impact of foggy,hazy and dusty weather on the bacterial communities in atmospheric bioaerosols,bioaerosol samples were collected in the coastal region of Qingdao on different weather from Dec.2017 to Apr.2018.Bioaerosol bacterial community compositions were measured using 16S rRNA high-through sequencing.The results showed that the compositions of bacterial community were significant varied on the hazy and dusty weather,as indicated by the higher richness and diversity of community than those on the sunny weather,and have a negative correlation with the aggravation of haze pollution,but the diversity decreased in foggy days while the richness almost kept the same.Air mass source had an effect on bacterial communities in hazy days.Proteobacteria was the dominant bacteria on any weather conditions,with the highest relative abundance on hazy days.At the genus level,Actinetobacter and Sphingomonas were the dominant genera during the period of haze,and the relative abundance of Micrococcus,Paracoccus and Pseudomonas were increased on foggy weather,while Bacillus was the dominant genus on dusty days.RDA analysis showed that O_(3) was the major environmental factor that could affect bacterial community.Opportunistic pathogens could be detected in foggy,hazy and dusty weather,which had potential harm to human health.
作者
汪瑶
祁建华
张婷
张大海
WANG Yao;QI Jian-Hua;ZHANG Ting;ZHANG Da-Hai(Key Laboratory of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China;Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266237, China;College of Chemical Engineering, Ocean University of China, Qingdao 266100, China)
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2021年第6期88-98,共11页
Periodical of Ocean University of China
基金
国家自然科学基金项目(41775148)
中央高校基本科研业务费专项(201762006)资助。
