Culturable Airborne Bacteria in Outdoor Environments in Beijing,China |
| |
Authors: | Zhiguo Fang Zhiyun Ouyang Hua Zheng Xiaoke Wang Lifeng Hu |
| |
Institution: | (1) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China;(2) College of Bio-Safety Science and Technology, Hunan Agriculture University, Changsha, China |
| |
Abstract: | Airborne bacteria are important biological components of bioaerosol and play an important role in ecosystem. Bacteria at a
high concentration in the atmosphere can result in biological air pollution and all kinds of diseases. In this study, a systematical
survey on the culturable airborne bacteria was carried out for 1 year at three sites in Beijing urban area. Results showed
that concentrations of culturable bacteria ranged from 71 colony forming units (CFU)/m3 to 22,100 CFU/m3, and the mean was 2,217 CFU/m3. Bacterial concentrations at the human activity-enriched site (RCEES) and the highly trafficked site (XZM) were virtually
the same point. They were significantly higher than those at the greener site (BBG). Significant variation in bacterial concentrations
in different seasons was observed at RCEES and XZM with higher concentrations in summer and autumn. In a single day, significantly
lower concentrations were detected at 13:00 hours through all sampling sites. In this study, 165 species in 47 genera of culturable
bacteria were identified. Micrococcus was one of the most dominant bacterial groups and contributed to approximately 20∼30% of the total bacterial concentration,
followed by Staphylococcus, Bacillus, Corynebacterium, and Pseudomonas. The bacterial species with a high concentration percentage included Micrococcus luteus and Micrococcus roseus. |
| |
Keywords: | |
本文献已被 PubMed SpringerLink 等数据库收录! |
|