Study of a virus-bacteria interaction model in a chemostat: application of geometrical singular perturbation theory

J.-C. Poggiale, P. Auger, F. Cordoleani, T. Nguyen-Huu
2009 Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences  
This paper provides a mathematical analysis of a virus-marine bacteria interaction model. The model is a simplified case of the model published and used by Middelboe (Middelboe, M. 2000 Microb. Ecol. 40, 114-124). It takes account of the virus, the susceptible bacteria, the infected bacteria and the substrate in a chemostat. We show that the numerical values of the parameters given by Middelboe allow two different time scales to be considered. We then use the geometrical singular perturbation
more » ... eory to study the model. We show that there are two invariant submanifolds of dimension two in the four-dimensional phase space and that these manifolds cross themselves on the boundary of the domain of biological relevance. We then perform a rescaling to understand the dynamics in the vicinity of the intersection of the manifolds. Our results are discussed in the marine ecological context.
doi:10.1098/rsta.2009.0132 pmid:19884175 fatcat:pnio6tt7snd3vobllpeoxoz4rq