Indirect commensalism promotes persistence of secondary consumer species
Indirect commensalism promotes persistence of secondary consumer species
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DOI：
10.1098/rsbl.2012.0572
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发表时间：
2012-12-23
期刊：
影响因子：
3.3
通讯作者：
van Veen, F. J. Frank
中科院分区：
文献类型：
--
作者：
Sanders, Dirk;van Veen, F. J. Frank
局部物种的灭绝往往会导致意想不到的二次灭绝。为了预测这些，我们需要了解在相互作用的物种网络中，间接影响是如何影响物种持续生存的能力的。据推测，一些捕食者的持续存在取决于其他捕食者物种，这些捕食者将竞争性优势猎物抑制到较低水平，从而允许更大的猎物物种及其捕食者共存。我们表明，在实验昆虫群落中，一种寄生蜂物种的消失确实会导致另一种被四个营养链隔开的寄生蜂物种的灭绝。这些结果强调了整体系统视角对生物多样性保护的重要性，以及在相互作用物种网络中预测级联灭绝的模型中包括间接种群动态效应的必要性。
Local species extinctions may lead to, often unexpected, secondary extinctions. To predict these, we need to understand how indirect effects, within a network of interacting species, affect the ability of species to persist. It has been hypothesized that the persistence of some predators depends on other predator species that suppress competitively dominant prey to low levels, allowing a greater diversity of prey species, and their predators, to coexist. We show that, in experimental insect communities, the absence of one parasitoid wasp species does indeed lead to the extinction of another that is separated by four trophic links. These results highlight the importance of a holistic systems perspective to biodiversity conservation and the necessity to include indirect population dynamic effects in models for predicting cascading extinctions in networks of interacting species.