Arnold Sommerfeld Center for Theoretical Physics and Center for NanoScience, Theresienstr. 37, Department of Physics, Ludwig-Maximilians-Universität München, D-80333 Munich, Germany.
Phys Rev E. 2018 Apr;97(4-1):042307. doi: 10.1103/PhysRevE.97.042307.
Multiple scales in metapopulations can give rise to paradoxical behavior: in a conceptual model for a public goods game, the species associated with a fitness cost due to the public good production can be stabilized in the well-mixed limit due to the mere existence of these scales. The scales in this model involve a length scale corresponding to separate patches, coupled by mobility, and separate time scales for reproduction and interaction with a local environment. Contrary to the well-mixed high mobility limit, we find that for low mobilities, the interaction rate progressively stabilizes this species due to stochastic effects, and that the formation of spatial patterns is not crucial for this stabilization.
在公共物品博弈的概念模型中,由于公共物品产生而导致适应成本的物种可以在充分混合的极限中稳定下来,仅仅是因为这些尺度的存在。该模型中的尺度涉及到与可动性相关的单独斑块的长度尺度,以及与局部环境进行繁殖和相互作用的单独时间尺度。与充分混合的高流动性极限相反,我们发现对于低流动性,由于随机效应,相互作用速率会逐渐稳定该物种,并且空间模式的形成对于这种稳定并不关键。