Delay-driven irregular spatiotemporal patterns in a plankton system.
Delay-driven irregular spatiotemporal patterns in a plankton system.
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DOI：
10.1103/physreve.88.012713
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发表时间：
2013-07
期刊：
影响因子：
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通讯作者：
Canrong Tian;Lai Zhang
中科院分区：
文献类型：
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作者：
Canrong Tian;Lai Zhang
物种密度在物理空间上的不均匀分布是浮游生物系统中广泛观察到的情况。了解导致这些空间格局的机制是浮游生物生态学的中心议题。在本文中，我们探讨了时滞的影响时空模式的捕食-食饵浮游生物系统。我们发现，时间延迟可以触发出现不规则的空间图案通过一个霍普夫分岔。此外，还观察到从规则螺旋图案到不规则螺旋图案的相变，后者逐渐取代前者并无限期地持续。出现的空间格局的特征长度是一致的浮游生物模式在现场研究中观察到的规模。
An inhomogeneous distribution of species density over physical space is a widely observed scenario in plankton systems. Understanding the mechanisms resulting in these spatial patterns is a central topic in plankton ecology. In this paper we explore the impact of time delay on spatiotemporal patterns in a prey-predator plankton system. We find that time delay can trigger the emergence of irregular spatial patterns via a Hopf bifurcation. Moreover, a phase transition from a regular spiral pattern to an irregular one was observed and the latter gradually replaced the former and persisted indefinitely. The characteristic length of the emergent spatial pattern is consistent with the scale of plankton patterns observed in field studies.