Processes structuring communities: evidence for trait-mediated indirect effects through induced polymorphisms
Processes structuring communities: evidence for trait-mediated indirect effects through induced polymorphisms
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DOI：
10.1034/j.1600-0706.2000.910215.x
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发表时间：
2000-11-01
期刊：
影响因子：
3.4
通讯作者：
Lively, CM
中科院分区：
文献类型：
--
作者：
Raimondi, PT;Forde, SE;Lively, CM
Trail-mediated indirect effects（TMI）是由一个物种的一个或多个性状的诱导变化引起的一个物种密度的变化。例如，被捕食物种的诱导防御可能会改变通过该被捕食物种介导的间接效应的性质。在本研究中，我们调查了TMI，干之间的相互作用的肉食性海螺（当归）和潮间带藤壶（Chthalmus anisopoma）。根据相互作用的时间，捕食者要么杀死藤壶，要么诱导一种抗捕食的变体。基于以前的工作，解决了直接的相互作用之间的Chthalus和其他物种的社区，我们预测，随后发现，社区结构的变化作为这些不同的影响的函数。具体来说，我们发现，贻贝有一个积极的间接影响，当它与（杀死）不设防的成年藤壶。相反。捕食者在结壳藻类（Ralfsia）与幼年藤壶接触时对结壳藻类（Ralfsia）具有积极的间接影响，导致诱导抗捕食者的变体。我们建议进一步的研究应考虑环境诱导的多态性在构建社区中的作用。
Trail-mediated indirect affects (TMIs) are changes in the density of one species that are caused by induced changes in one or more traits of an intervening species. For example, induced defense in a prey species may alter the nature of indirect effects that are mediated through that prey species. In the present study, we investigated the TMIs that stem from an interaction between a carnivorous whelk (Acanthina angelica) and an intertidal barnacle (Chthamalus anisopoma). Depending on the timing of the interaction, the predator either kills the barnacle or induces a predation-resistant morph. Based on previous work that addressed the direct interactions between Chthamalus and other species in the community we predicted and subsequently found that community structure varies as a function of these differing effects. Specifically, we found that Acanthina has a positive indirect effect on mussels when it interacts with (kills) undefended adult barnacles. In contrast. the predator has a positive indirect effect on an encrusting algae (Ralfsia) when it comes into contact with juvenile barnacles, causing the induction of the predator-resistant morph. We suggest that further research should consider the role of environmentally induced polymorphisms in structuring communities.