Effect of diseases on symbiotic systems

There are many species living in symbiotic communities. In this study, we analyzed models in which populations are in the mutualism symbiotic relations subject to a disease spreading among one of the species. The main goal is the characterization of symbiotic relations of coexisting species through...

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Bibliographic Details
Published in:BioSystems 2017-09, Vol.159, p.36-50
Main Authors: Tiwari, Pankaj Kumar, Sasmal, Sourav Kumar, Sha, Amar, Venturino, Ezio, Chattopadhyay, Joydev
Format: Article
Language:English
Subjects:
Animals
Disease Transmission, Infectious
Dynamics of coexisting species
Ecoepidemiology
Humans
Mathematical model
Models, Biological
Mortality
Nonlinear differential equations
Population Dynamics
Predatory Behavior
Symbiosis
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Summary:There are many species living in symbiotic communities. In this study, we analyzed models in which populations are in the mutualism symbiotic relations subject to a disease spreading among one of the species. The main goal is the characterization of symbiotic relations of coexisting species through their mutual influences on their respective carrying capacities, taking into account that this influence can be quite strong. The functional dependence of the carrying capacities reflects the fact that the correlations between populations cannot be realized merely through direct interactions, as in the usual predator-prey Lotka-Volterra model, but also through the influence of each species on the carrying capacities of the other one. Equilibria are analyzed for feasibility and stability, substantiated via numerical simulations, and global sensitivity analysis identifies the important parameters having a significant impact on the model dynamics. The infective growth rate and the disease-related mortality rate may alter the stability behavior of the system. Our results show that introducing a symbiotic species is a plausible way to control the disease in the population.
ISSN:0303-2647
1872-8324
DOI:10.1016/j.biosystems.2017.07.001