[Community composition and dynamics of airborne bacteria in Beijing].
Airborne bacteria are important biological components of the aerosol. They have a close relation with human health. The much higher concentrations can result in kinds of microbial disease. Using BIOLOG identification technology, the study on the community structure and dynamics of airborne bacteria was carried out in three typical functional areas in Beijing by systemic site sampling. Results show that the gram positive bacteria contributing 80%-85% were much more than the gram negative bacteria. Amongst 47 genera of bacteria including 31 Gram positive bacteria and 16 Gram negative bacteria, Micrococcus, Staphylococcus, Bacillus, Corynebacterium, and Pseudomonas were dominant, and Micrococcus contributing 20%-30% was the most dominant genus. The concentration of airborne bacteria was significant lower in GGR than in CER and MTL. In a year, the bacterial concentrations of summer and autumn were much more than those of winter and spring in CER and MTL, and there were no significant variations of bacterial concentrations in GGR. In different periods, the lower concentration of airborne bacteria was exhibited at 13:00.
Fang
Zhi-guo
ZG
Ky Laboratory of Systems Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. zhgfang77@sohu.com
Ouyang
Zhi-yun
ZY
Zhao
Jing-zhu
JZ
Wang
Xiao-ke
XK
Zheng
Hua
H
D000391:Air Microbiology; D001407:Bacillus / Q000254:growth & development; D001419:Bacteria / Q000145:classification / Q000254:growth & development*; D002681:China; D003352:Corynebacterium / Q000254:growth & development; D006090:Gram-Negative Bacteria / Q000145:classification / Q000254:growth & development; D006094:Gram-Positive Bacteria / Q000145:classification / Q000254:growth & development; D008837:Micrococcus / Q000254:growth & development; D011549:Pseudomonas / Q000254:growth & development; D012621:Seasons; D013210:Staphylococcus / Q000254:growth & development