Dynamics of free-living nitrogen-fixing bacterial populations and nitrogen fixation in a two-prey–one-predator system

A. Kavadia, D.V. Vayenas, S. Pavlou and G. Aggelis

Ecological Modelling, 2008, vol. 218, issue 3, 323-338

Abstract: The dynamics of a model of a free-living nitrogen-fixing population, grown in a chemostat together with a non-nitrogen-fixing bacterial population in competition for the available nutrients and a predator, was studied through bifurcation analysis. When the nitrogen-fixing population is slightly inhibited by ammonium nitrogen (NH3), then this population survives at steady state at low NH3 concentration for a wide range of dilution rate values. At high NH3 concentration the nitrogen-fixing population survives at high dilution rate values, while at lower dilution rate values survival of the nitrogen-fixing population is possible when both the competitive population and the predator are present.

Keywords: Population dynamics; Nitrogen fixation; Competition; Predation; Coexistence (search for similar items in EconPapers)
Date: 2008
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Persistent link: https://EconPapers.repec.org/RePEc:eee:ecomod:v:218:y:2008:i:3:p:323-338

DOI: 10.1016/j.ecolmodel.2008.07.018

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