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首页> 外文期刊>Ecology letters >Field evidence of trait-mediated indirect interactions in a rocky intertidal food web
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Field evidence of trait-mediated indirect interactions in a rocky intertidal food web

机译：岩石潮间带食物网中特质介导的间接相互作用的现场证据

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Studies on the implications of food web interactions to community structure have often focused on density-mediated interactions between predators and their prey. This approach emphasizes the importance of predator regulation of prey density via consumption (i.e. lethal effects), which, in turn, leads to cascading effects on the prey's resources. A more recent and contrasting view emphasizes the importance of non-lethal predator effects on prey traits (e.g. behaviour, morphology), or trait-mediated interactions. On rocky intertidal shores in New England, green crab (Carcinus maenas) predation is though to be important to patterns of algal abundance and diversity by regulating the density to herbivorous snails (Littorina littorea). We found, however, that risk cues from green crabs can dramatically suppress snail grazing, with large effects on fucoid algal communities. Our results suggest that predator-induced changes in prey behaviour may be an important and under-appreciated component of food web interactions and community dynamics on rocky intertidal shores.
机译：关于食物网相互作用对社区结构的影响的研究通常集中在掠食者与其猎物之间的密度介导的相互作用。这种方法强调了掠食者通过消耗来调节猎物密度的重要性（即致死作用），进而导致对猎物资源的连锁影响。最近的另一种观点强调了非致命捕食者对猎物特质（例如行为，形态）或特质介导的相互作用的重要性。在新英格兰的潮间带岩石海岸上，通过调节草食蜗牛的密度，绿蟹（Carcinus maenas）的捕食对于藻类丰富度和多样性的格局很重要。但是，我们发现，来自绿蟹的风险提示可以极大地抑制蜗牛的放牧，对岩藻类藻类群落产生巨大影响。我们的结果表明，捕食者引起的猎物行为变化可能是潮间带海岸食物网相互作用和群落动态的重要且未被充分认识的组成部分。

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