论文标题
分散引起的复杂生态系统的不稳定
Dispersal-induced instability in complex ecosystems
论文作者
论文摘要
罗伯特·梅（Robert May）在1970年代的开创性工作中建议，生态系统可以在稳定平衡中维持的物种数量有上限。这种推论与许多自然生态系统的直觉和观察到的复杂性不一致。随之而来的是所谓的稳定多样性辩论，有关导致生态系统稳定性或不稳定的因素的讨论一直持续到今天。我们在这项工作中表明，分散可能是不稳定的影响。为此，我们将艾伦·图灵（Alan Turing）关于模式形成的工作的想法与梅的随机矩阵方法相结合。我们证明了在复杂的生态系统中与营养结构的稳定平衡如何随着空间的扩散而变得不稳定，我们讨论了对这种效果的影响的因素。我们的工作强调，将更多细节添加到May的模型中可能会为生态系统变得不稳定带来更多方法。因此，使May的简单模型更加现实，因此不太可能完全消除复杂性的上限。
In his seminal work in the 1970s, Robert May suggested that there is an upper limit to the number of species that can be sustained in stable equilibrium by an ecosystem. This deduction was at odds with both intuition and the observed complexity of many natural ecosystems. The so-called stability-diversity debate ensued, and the discussion about the factors contributing to ecosystem stability or instability continues to this day. We show in this work that dispersal can be a destabilising influence. To do this, we combine ideas from Alan Turing's work on pattern formation with May's random-matrix approach. We demonstrate how a stable equilibrium in a complex ecosystem with trophic structure can become unstable with the introduction of dispersal in space, and we discuss the factors which contribute to this effect. Our work highlights that adding more details to the model of May can give rise to more ways for an ecosystem to become unstable. Making May's simple model more realistic is therefore unlikely to entirely remove the upper bound on complexity.
