捕食者-猎物系统中的频率相关进化

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-05-04 DOI:10.1111/nrm.12308

Azmy S. Ackleh, A. Veprauskas

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引用次数: 1

摘要

我们提出了一个离散时间捕食者-猎物模型，在该模型中，假设猎物种群对毒物的反应是进化的。我们将频率依赖性选择纳入猎物进化，假设个体对捕食的易感性取决于它所拥有的特征和种群中其他人的特征。当频率相关选择是对称的时，我们表明特征方程无法跟踪适应度景观的变化，也就是说，当特征继续进化到相同的特征值时，适应度景观可能会发生变化。因此，进化可能会产生不合适的猎物种群。同时，我们证明了非对称频率依赖性可能对系统产生不稳定影响，通过Neimark–Sacker分岔产生闭合不变曲线。

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Frequency‐dependent evolution in a predator–prey system

We present a discrete‐time predator–prey model in which the prey population is assumed to evolve in response to a toxicant. We incorporate frequency‐dependent selection into the prey evolution, assuming that an individual's susceptibility to predation depends on both the trait it possesses and the traits of others in the population. When frequency‐dependent selection is symmetric, we show that the trait equation is unable to track changes in the fitness landscape, that is, the fitness landscape may change while the trait continues to evolve to the same trait value. As a result, evolution may produce unfit prey populations. Meanwhile, we show that asymmetric frequency‐dependence may have a destabilizing effect on the system, resulting in a closed invariant curve via a Neimark–Sacker bifurcation.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.