Long-Term Effects of Predator Arrival Timing on Prey Community Succession
Long-Term Effects of Predator Arrival Timing on Prey Community Succession
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DOI：
10.1086/596538
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发表时间：
2009-03-01
影响因子：
2.9
通讯作者：
Fukami, Tadashi
中科院分区：
文献类型：
--
作者：
Olito, Colin;Fukami, Tadashi
竞争物种的随机到来及其随后的相互作用已被强调为群落聚集中潜在的生物历史效应的主要力量。然而，尽管捕食对猎物群落的影响得到了广泛的认可，但捕食者的随机到来对聚集群落的影响却知之甚少。我们使用微生物微观世界实验来研究捕食者到达经历自然演替的猎物群落的时间是否会影响物种丰富度和群落多样性。捕食者到达的时间影响着被捕食者物种的长期丰富度，在没有捕食者的情况下，这种多样性在整个演替过程中都是持续的。我们的数据表明，这种时序效应是通过早期演替的捕食者和捕食者之间的瞬时相互作用间接发生的。具体地说，我们认为，短暂的早期演替的猎物物种为早到(但不是晚到)的捕食者提供了一个跳板，允许捕食者增加它们的丰富度，并随后改变长期的群落动态。这些结果表明，捕食者到来的历史可以对生态演替中的群落结构产生持久的影响。
The stochastic arrival of competing species and their subsequent interactions have been highlighted as principal forces underlying biotic historical effects in community assembly. However, despite the widely recognized effect of predation on prey communities, the effects that the stochastic arrival of predators may have on assembling communities are poorly understood. We used a microbial microcosm experiment to investigate whether the timing of predator arrival to a prey community undergoing naturalistic succession affected species abundances and community diversity. Predator arrival timing affected the long-term abundance of a prey species that was persistent throughout succession in the absence of predators. Our data indicate that this timing effect occurred indirectly via transient interactions between early-successional prey species and predators. Specifically, we suggest that transient early-successional prey species served as a springboard for early-arriving (but not late-arriving) predators, allowing the exploiting predators to increase their abundances and subsequently alter long-term community dynamics. These results show that the history of predator arrival can have lasting consequences for community structure in ecological succession.