论文标题
一般的非线性模仿导致限制生态进化动力学的周期
General non-linear imitation leads to limit cycles in eco-evolutionary dynamics
论文作者
论文摘要
生态进化动力学对于了解个人的行为和周围环境如何相互作用至关重要。通常,假定个人通过线性模仿功能(即复制器动力学)更新其行为。已经证明,这种生态进化动力学中不能有极限圈子。它表明,仅生态进化动力学不足以解释生物学和社会系统中广泛观察到的波动行为。我们从线性模仿函数推断为一般模仿函数,这可能是非线性的。结果表明,一般模仿不会改变内部平衡及其局部稳定性。但是,它导致限制周期,这些周期永远不会存在于经典的生态进化动力学中。此外,平均合作水平和平均环境状态与内部固定点的第一个和第二个组成部分一致。此外,我们估计了紧急极限周期的位置。一方面,我们的结果提供了一种替代机制,可以使合作者和叛逃者在“共同体的悲剧”中以周期性的方式共存,并表明全球生态进化动力学对模仿函数敏感。我们的工作表明,模仿的方式,即模仿函数在生态进化动力学中至关重要,这对于具有静态环境的进化动力学并不正确。
Eco-evolutionary dynamics is crucial to understand how individuals' behaviors and the surrounding environment interplay with each other. Typically, it is assumed that individuals update their behaviors via linear imitation function, i.e., the replicator dynamics. It has been proved that there cannot be limit circles in such eco-evolutionary dynamics. It suggests that eco-evolutionary dynamics alone is not sufficient to explain the widely observed fluctuating behavior in both the biological and social systems. We extrapolate from the linear imitation function to general imitation function, which can be non-linear. It is shown that the general imitation does not change the internal equilibrium and its local stability. It however leads to limit cycles, which are never present in classical eco-evolutionary dynamics. Moreover, the average cooperation level and average environment state agree with the first and the second component of the internal fixed point. Furthermore, we estimate the location of the emergent limit cycle. On the one hand, our results provide an alternative mechanism to make cooperators and defectors coexist in a periodic way in the "tragedy of the commons" and indicates the global eco-evolutionary dynamics is sensitive to the imitation function. Our work indicates that the way of imitation, i.e., the imitation function, is crucial in eco-evolutionary dynamics, which is not true for evolutionary dynamics with a static environment.