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)/m(3) to 22,100 CFU/m(3), and the mean was 2,217 CFU/m(3). 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 approximately 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.
journal_name
Microb Ecoljournal_title
Microbial ecologyauthors
Fang Z,Ouyang Z,Zheng H,Wang X,Hu Ldoi
10.1007/s00248-007-9216-3subject
Has Abstractpub_date
2007-10-01 00:00:00pages
487-96issue
3eissn
0095-3628issn
1432-184Xjournal_volume
54pub_type
杂志文章abstract：:Rates of leaf litter decomposition in streams are strongly influenced both by inorganic nutrients dissolved in stream water and by litter traits such as lignin, nitrogen (N) and phosphorus (P) concentrations. As a result, decomposition rates of different leaf species can show contrasting responses to stream nutrient e...
journal_title：Microbial ecology
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doi：10.1007/s00248-013-0295-z
更新日期：2014-01-01 00:00:00
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journal_title：Microbial ecology
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journal_title：Microbial ecology
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journal_title：Microbial ecology
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