Regional Species Pools and the Assembly of Local Ecological Communities
Regional Species Pools and the Assembly of Local Ecological Communities
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区域物种库和当地生态群落的集合
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
R. Law
中科院分区：
文献类型：
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作者：
R. D. Morton;R. Law
摘要我们利用动态系统理论中的持久性概念，模拟了物种进入社区的顺序组装，研究了物种库对当地社区发展的影响。结果表明，从物种丰富的游泳池建立的社区发展到抗入侵状态的速度较慢。在消费者丰富的地方，发现的基底物种较少，尽管消费者对不同种类猎物的专门化使更多的基底物种在当地存在。通过这种组装过程最终达到的抗入侵状态可能是单一群落或群落的循环序列，而不是循环中的物种。这些组装的终态是物种库的属性，它们的形式取决于物种库的性质。如果足够丰富，物种库会导致当地社区的饱和，使得当地存在的物种数量与库的丰富程度脱钩。
Abstract We model the sequential assembly of species into communities, using a notion of permanence from dynamical-systems theory, to investigate effects of species pools on the development of local communities. The results show that communities built from species-rich pools develop more slowly to invasion-resistant states. Fewer basal species are found locally where species are rich in consumers, although specialization by the consumers for different kinds of prey enables more basal species to exist locally. The invasion-resistant states eventually achieved by such an assembly process may be single communities or cyclic sequences of communities uninvadable by species not in the cycle. These endstates of assembly are properties of the species pool, and the form they take depends on the nature of the pool. If made rich enough, species pools cause saturation of local communities such that the number of species present locally becomes uncoupled from the richness of the pool.