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报告题目:Modelling planktonic blooms with toxin-producing phytoplankton and environmental fluctuations
发布日期:2018-12-17 14:57:40 浏览次数:

报 告 人:原三领 教授,上海理工大学 

报告时间:2018-12-22,16:00

报告地点:数学科学学院108报告厅

报告摘要:

Toxin-producing phytoplankton (TPP) and environmental fluctuations are important factors influencing the real aquatic ecosystems. Whether planktonic blooms are related to these factors is an interesting problem. In this talk, we focus on the effects of toxin-producing phytoplankton and environmental fluctuations on the planktonic blooms. Based on “bottom-up” mechanism, we formulate two nutrient-phytoplankton models with TPP under environmental fluctuations. In addition, based on “top-down” mechanism, we also propose a stochastic phytoplankton-zooplankton model with TPP in an impulsive polluted environment. With the help of stochastic differential equation theory, we have analyzed the above models in detail. Combined with the published data, we numerically illustrate the obtained results. From theoretical analysis and numerical simulations, periodic oscillatory succession of planktonic blooms can be seen clearly, which suggests that toxin-producing phytoplankton and environmental fluctuations play a key role in the termination of algal blooms. 

主办单位:扬州大学数学科学学院

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