Climate factors influencing bacterial count in background air samples
Climate factors influencing bacterial count in background air samples
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DOI：
10.1007/s00484-004-0225-3
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发表时间：
2005-01-01
影响因子：
3.2
通讯作者：
Beswick, A
中科院分区：
文献类型：
--
作者：
Harrison, RM;Jones, AM;Beswick, A
总（而不是可培养的）细菌数量计数的报告，在英国的四个网站在运动中测量超过四个不同的季节。这些都是解释与简单的气候因素，即温度，风速和风向。温度有显着的影响，在所有四个网站的数据为农村沿海网站符合最好的一个简单的指数模型。其他农村和城市地区的数据显示，基线与沿海农村地区的基线相似，但有一些非常显著的正偏移。细菌数量的温度依赖性被发现符合典型的细菌生长速率。在沿海农村地区，温度归一化的细菌数量没有显示出对风速的依赖性，而在内陆地区，随着风速的增加，预计大面积来源的形式有所减少。只有一个网站似乎显示出系统的细菌浓度的风向，是在伯明翰郊区的一个网站，在接近市中心的风部门观察到的最高数量的浓度。PCR技术已被用来确定的优势类型的细菌和结果表明，芽孢杆菌是在三个内陆网站在冬季和夏季观察到的优势属。假单胞菌在某些地点和季节出现的频率相当。一般来说，在沿海站点的细菌比在内陆站点的多样性更大。
Total (as opposed to culturable) bacterial number counts are reported for four sites in the United Kingdom measured during campaigns over four separate seasons. These are interpreted in relation to simple climatic factors, i.e. temperature, wind speed and wind direction. Temperature has a marked effect at all four sites with data for a rural coastal site conforming best to a simple exponential model. Data for the other rural and urban locations show a baseline similar to that determined at the coastal rural location, but with some very significant positive excursions. The temperature dependence of bacterial number is found to conform to that typical of bacterial growth rates. At the coastal rural location, bacterial numbers normalised for temperature show no dependence on wind speed whilst at the inland sites there is a decrease with increasing wind speed of the form expected for a large area source. Only one site appeared to show a systematic relationship of bacterial concentrations to wind direction that being a site in the suburbs of Birmingham with highest number concentrations observed on a wind sector approaching from the city centre. PCR techniques have been used to identify predominant types of bacteria and results are presented which show that Bacillus was the dominant genus observed at the three inland sites during the winter and summer seasons. Pseudomonas appeared with comparable frequency at certain sites and seasons. There was in general a greater diversity of bacteria at the coastal site than at the inland sites.