Noise and seasonal effects on the dynamics of plant-herbivore models with monotonic plant growth functions

Details Noise and seasonal effects on the dynamics of plant-herbivore models with monotonic plant growth functions Noise and seasonal effects on the dynamics of plant-herbivore models with monotonic plant growth functions

2011-02-11

arxiv.org/abs/1102.2279v1

International Journal of Biomathematics (2011)

Mathematics

Dynamical Systems

20 pages, 8 figures

Scientific paper

We formulate general plant-herbivore interaction models with monotone plant growth functions (rates). We study the impact of monotone plant growth functions in general plant-herbivore models on their dynamics. Our study shows that all monotone plant growth models generate a unique interior equilibrium and they are uniform persistent under certain range of {parameters} values. However, if the attacking rate of herbivore is too small or the quantity of plant is not enough, then herbivore goes extinct. Moreover, these models lead to noise sensitive bursting which can be identified as a dynamical mechanism for almost periodic outbreaks of the herbivore infestation. Monotone and non-monotone plant growth models are contrasted with respect to bistability and crises of chaotic attractors.

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