Bonsall M B, Hassell M P
Department of Biology and Natural Environment Research Council Centre for Population Biology, Imperial College at Silwood Park, Ascot, Berkshire SL5 7PY, UK.
Proc Biol Sci. 2000 Nov 7;267(1458):2207-12. doi: 10.1098/rspb.2000.1270.
The interaction between two species that do not compete for resources but share a common natural enemy is known as apparent competition. In the absence of other limiting factors, such three-species interactions are impermanent, with one species being excluded from the assemblage by the natural enemy. Here, the effects of metapopulation structure are explored in a system of two hosts that experience apparent competition through a shared parasitoid. A coupled-map lattice model is developed and used to explore species coexistence and patterns of patch occupancy at the metapopulation scale. Linking local and regional dynamics favours coexistence by uncoupling the dynamics of the three species in space. Coexistence is promoted by the inferior species being either a fugitive or a sedentary species. The occurrence of these two mutually exclusive mechanisms of coexistence is influenced by the relative dispersal of the inferior apparent competitor.
两个物种之间不存在资源竞争但共享一个共同天敌的相互作用被称为似然竞争。在没有其他限制因素的情况下，这种三物种相互作用是不持久的，其中一个物种会被天敌从组合中排除。在此，在一个由两个宿主组成的系统中探索集合种群结构的影响，这两个宿主通过共享的寄生蜂经历似然竞争。开发了一个耦合映射格子模型，并用于探索集合种群尺度上的物种共存和斑块占据模式。将局部和区域动态联系起来，通过在空间中解耦三个物种的动态来促进共存。共存由劣势物种为逃亡物种或定居物种来促进。这两种相互排斥的共存机制的出现受到劣势似然竞争者相对扩散的影响。
