arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1707.05089q-bio.PEcond-mat.stat-mech
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环境随机性与进化速度

Environmental stochasticity and the speed of evolution

Matan Danino, David A. Kessler, Nadav M. Shnerb

摘要:

生物种群受到两种类型的噪音的影响:由于个体繁殖成功的波动而产生的人口统计随机性,以及连贯地影响整个种群相对适合度的环境变化。到目前为止,已被认为是使用纯人口统计随机模型的平均健身的社区增加的速度,在这里,我们提出了一些理论考虑和数值结果的一般情况下,环境的变化被考虑在内。当竞争是成对的,健身波动,以降低进化的速度,而在全球竞争的速度增加,由于环境的随机性。

英文摘要:

Biological populations are subject to two types of noise: demographic stochasticity due to fluctuations in the reproductive success of individuals, and environmental variations that affect coherently the relative fitness of entire populations. The rate in which the average fitness of a community increases has been considered so far using models with pure demographic stochasticity; here we present some theoretical considerations and numerical results for the general case where environmental variations are taken into account. When the competition is pairwise, fitness fluctuations are shown to reduce the speed of evolution, while under global competition the speed increases due to environmental stochasticity.

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