论文标题
分散结构群体中自然选择的动态
The dynamics of natural selection in dispersal-structured populations
论文作者
论文摘要
研究了由以不同扩散系数为特征的个体组成的分散结构种群中的自然选择问题。通过假设个体的繁殖和/或死亡概率受到半径r的邻域内个体的数量的影响，可以考虑到生物体之间的竞争。可以观察到，对于广泛的参数，竞争优势给出了竞争优势的运动，其运动的特征是散射系数的中间值，而不是大多数或最小的动作值。分散的最佳水平取决于各种因素之间的相互作用，例如集群形成，时间波动，初始条件和系统的承载能力。详细研究了系统的动力学和时间演变，揭示了这种分散结构的人群中自然选择的获胜机制和过程。此外，讨论了生物体相互作用半径R的不同值的结果的重新缩放。
The problem of natural selection in dispersal-structured populations consisting of individuals characterized by different diffusion coefficients is studied. The competition between the organisms is taken into account through the assumption that the reproduction and/or death probability of an individual is influenced by the number of other individuals within a neighborhood with radius R. It is observed that for a wide range of parameters the competition advantage is given to the individuals whose motion is characterized by intermediate values of diffusion coefficient, instead of the most or least motile ones. The optimal level of the dispersal is determined by the interplay between various factors such as cluster formation, temporal fluctuations, initial conditions, and carrying capacity of the system. The dynamics and the time evolution of the system are investigated in detail revealing the winning mechanism and process of the natural selection in such dispersal-structured populations. Furthermore, the rescaling of the results is discussed for different values of the interaction radius R of the organisms.
