Specialization at an expanding front
Specialization at an expanding front
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不断扩大的专业化
DOI：
10.1103/physreve.108.l032402
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发表时间：
2023
影响因子：
2.4
通讯作者：
Kardar, Mehran
中科院分区：
文献类型：
--
作者：
Li, Lauren H.;Kardar, Mehran
随着种群的增长，向新环境的扩散可能有利于专业化。本文引入并探讨了一个在集群前沿同步扩张的专业化模型。我们通过数值模拟表明，通过积累突变获得适应度，初始种子种群的后代可以分化成不同的专家。由于竞争和选择仅限于增长前沿，新兴的专家首先被隔离到各个部门，然后扩展到整个人口。我们量化的固定时间的缩放与人口的大小，并观察到不同的行为对应于不同的普适性类：无界和有界的增益在健身导致superdiffusive（）和diffusive（）随机漫游的部门边界，分别。
As a population grows, spreading to new environments may favor specialization. In this paper, we introduce and explore a model for specialization at the front of a colony expanding synchronously into new territory. We show through numerical simulations that, by gaining fitness through accumulating mutations, progeny of the initial seed population can differentiate into distinct specialists. With competition and selection limited to the growth front, the emerging specialists first segregate into sectors, which then expand to dominate the entire population. We quantify the scaling of the fixation time with the size of the population and observe different behaviors corresponding to distinct universality classes: unbounded and bounded gains in fitness lead to superdiffusive () and diffusive () stochastic wanderings of the sector boundaries, respectively.