扩散在集合种群的生态准中性竞争中起着不寻常的作用
Diffusion plays an unusual role in ecological quasi-neutral competition in metapopulations
摘要：
我们研究了集合种群框架下准中性竞争的两种群动态现象。我们采用随机和确定性的方法，即空间约束的个人为基础的蒙特卡罗模拟和耦合平均场常微分方程。我们的研究结果表明，竞争，生灭动态和空间约束之间的多重相互作用，导致生态多数-少数切换和斑块之间的扩散之间的非单调关系。这意味着扩散可以引发出生-死亡比率，并加强物种的保护。
英文摘要：
We investigate the phenomenology emerging from a 2-species dynamics under the scenario of a quasi-neutral competition within a metapopulation framework. We employ stochastic and deterministic approaches, namely spatially-constrained individual-based Monte Carlo simulations and coupled mean-field ODEs. Our results show the multifold interplay between competition, birth-death dynamics and spatial constraints induces a nonmonotonic relation between the ecological majority-minority switching and the diffusion between patches. This means that diffusion can set off birth-death ratios and enhance the preservation of a species.
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