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 nonaerated 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.
ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics