Community assembly time and the relationship between local and regional species richness
Community assembly time and the relationship between local and regional species richness
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群落聚集时间与当地和区域物种丰富度的关系
DOI：
10.1034/j.1600-0706.2003.12772.x
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发表时间：
2003
期刊：
影响因子：
3.4
通讯作者：
T. Miller
中科院分区：
文献类型：
--
作者：
N. Mouquet;P. Munguia;J. Kneitel;T. Miller
许多以前的研究假设，当地和区域物种丰富度之间的线性关系表明，社区是有限的区域过程，而饱和的关系表明，物种的相互作用限制了当地的丰富度。我们从理论上表明，当地和区域的丰富性之间的关系的变化在一个一致的方式与组装时间在相互作用的社区。社区在其早期集合阶段表现出饱和，因为只有一个子集的区域池可能殖民一个地方。在中间组装时间，社区将出现不饱和，直到显着的竞争排斥发生。最后，当社区达到平衡，我们发现饱和的结果，资源竞争导致的优势，数量有限的物种。我们发现，栖息地的大小和物种繁殖力是重要的，在确定所需的时间为社会达到平衡，从而影响当地和区域物种丰富度之间的关系。我们的研究结果表明，共存物种的数量是一个功能的本地和区域的过程，其相对影响可能会随着时间的推移而变化，研究使用本地和区域物种丰富度之间的关系，以推断限制物种丰富度的机制，必须有知识的组装时间的社会。
Many previous studies have assumed that a linear relationship between local and regional species richness indicates that communities are limited by regional processes, while a saturating relationship suggests that species interactions restrict local richness. We show theoretically that the relationship between local and regional richness changes in a consistent fashion with assembly time in interacting communities. Communities show saturation in their early assembly stages because only a subset of the regional pool may colonize a locality. At intermediate assembly times, communities will appear unsaturated until significant competitive exclusion occurs. Finally, when communities reach equilibrium, we found saturation as a result of resource competition resulting in the dominance of a limited number of species. We show that habitat size and species fecundity are important in determining the time needed for the community to reach equilibrium and thus affect the relationship between local and regional species richness. Our results suggest the number of coexisting species is a function of local and regional processes whose relative influences might vary over time and that research using the relationship between local and regional species richness to infer mechanisms limiting species richness must have knowledge of the assembly time of the community.