Stationary distribution and extinction of a three-species food chain stochastic model

Stationary distribution and extinction of a three-species food chain stochastic model
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三物种食物链随机模型的平稳分布和灭绝

DOI:
10.1016/j.trmi.2017.12.002
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发表时间:
2018-08
期刊:
Transactions of A. Razmadze Mathematical Institute
影响因子:
--
通讯作者:
Qimin Zhang
Qimin Zhang
中科院分区:
其他
文献类型:
--
作者:
Yonggang Ma;Qimin Zhang

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在本文中,我们研究了随机三物种食物链模型的长期行为。通过马尔可夫半群理论,我们证明了该模型的密度在适当的条件下可以收敛到不变密度,或者可以弱地收敛到L 1 中的奇异测度。此外,还获得了这三个物种灭绝的几个充分条件。最后,进行数值模拟来说明我们的理论结果。
In this paper, we investigate long-time behaviour of a stochastic three-species food chain model. By Markov semigroups theory, we prove that the densities of this model can converge to an invariant density or can converge weakly to a singular measure in L 1 under appropriate conditions. Further, several sufficient conditions for the extinction of the three species were obtained. Finally, numerical simulations are carried out to illustrate our theoretical results.
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