Roy Manojit, Pascual Mercedes, Levin Simon A
Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109-1048, USA.
Theor Popul Biol. 2004 Dec;66(4):341-53. doi: 10.1016/j.tpb.2004.06.012.
This paper investigates the effect of a dynamic landscape on the persistence of many interacting species. We develop a multi-species community model with an evolving landscape in which the creation and destruction of habitat are dynamic and local in space. Species interactions are also local involving hierarchical competitive trade-offs. We show that dynamic landscapes can reverse the trend of increasing species richness with higher fragmentation observed in static landscapes. The increase in the species-area exponent from a homogeneous to a fragmented landscape does not occur when dynamics are turned on. Thus, temporal aspects of the processes that generate and destroy habitat appear dominant relative to spatial characteristics. We also demonstrate, however, that temporal and spatial aspects interact to influence the persistence time of individual species, and therefore, rank-abundance curves. Specifically, persistence in the model increases in habitats with faster local turnover because of the presence of dynamic corridors.
本文研究了动态景观对众多相互作用物种持久性的影响。我们开发了一个多物种群落模型，其中景观是不断演化的，栖息地的创建和破坏在空间上是动态且局部的。物种间的相互作用也是局部的，涉及分层竞争权衡。我们表明，动态景观可以扭转在静态景观中观察到的随着破碎化程度增加物种丰富度上升的趋势。当开启动态变化时，从均匀景观到破碎景观的物种 - 面积指数不会增加。因此，相对于空间特征，产生和破坏栖息地过程的时间方面似乎占主导地位。然而，我们也证明，时间和空间方面相互作用，影响单个物种的持续时间，进而影响秩 - 丰度曲线。具体而言，由于动态廊道的存在，模型中的持久性在局部周转较快的栖息地中会增加。
