Jánosi Imre M, Czirók András, Silhavy Dániel, Holczinger András
Department of Physics of Complex Systems, Eötvös University, PO Box 32, H-1518 Budapest, Hungary.
Environ Microbiol. 2002 Sep;4(9):525-31. doi: 10.1046/j.1462-2920.2002.00328.x.
Bioconvection is an intriguing pattern-forming phenomenon driven by the swimming activity of various aquatic microorganisms. It is generally assumed that bioconvection has a positive effect on the entire microbial population by carrying oxygen into deep layers of non-aerated suspensions. In order to examine the presence of such a biological benefit, we analysed the correlation between bioconvective pattern formation and population growth of several Bacillus subtilis and Bacillus licheniformis strains under non-aerated conditions. Bioconvection is a robust phenomenon, we observed its development in numerous cultures of various strains and growth phases. Nevertheless, evaluation of the data has not revealed detectable positive effects on population growth, questioning the potential biological relevance of bioconvection in natural habitats.
生物对流是一种由各种水生微生物的游动活动驱动的有趣的图案形成现象。通常认为，生物对流通过将氧气输送到未曝气悬浮液的深层，对整个微生物群体产生积极影响。为了检验这种生物学益处的存在，我们分析了在未曝气条件下几种枯草芽孢杆菌和地衣芽孢杆菌菌株的生物对流图案形成与种群生长之间的相关性。生物对流是一种稳健的现象，我们在各种菌株和生长阶段的众多培养物中观察到了它的发展。然而，对数据的评估并未揭示对种群生长有可检测到的积极影响，这对生物对流在自然栖息地中的潜在生物学相关性提出了质疑。
