Abstract
AbstractThis paper describes an aspect of the growth dynamics exhibited by a ‘tight’ syntrophic association of two species in batch culture. Species X utilises substrate S and forms a product P. The substance P both inhibits the growth of X, by virtue of the thermodynamic back reaction, and constitutes the growth‐limiting substrate of the organism Y. It is predicted that the resulting dynamical balance in the level of P results in an equalisation of the specific growth rates of the two populations. It is demonstrated that the equalisation of specific growth rates is a characteristic property of tight syntrophic associations in general, and occurs whenever the growth dependencies on substances S and P satisfy certain qualitative conditions.
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