In this talk, we investigate a model of the oxygen-phytoplankton-zooplankton dynamics to understand the underlying properties of the effect of environmental stochasticity both on oxygen production rate and phytoplankton growth rate. We address this issue theoretically by means of a coupled oxygen-plankton dynamics where some parameters are affected from environmental stochasticity. Obtained results show that small noise on oxygen production rate results in less likely depletion of oxygen in a water body and it appears that the probability of oxygen depletion decreases with increasing value of temperature.  

Keywords - Oxygen-plankton system; stochasticity; mathematical modelling; spatial distribution; dynamical system.

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