期刊
HYDROBIOLOGIA
卷 732, 期 1, 页码 173-181出版社
SPRINGER
DOI: 10.1007/s10750-014-1857-x
关键词
Damselfly; Foraging; Indirect effect; Newt; Predator-prey interaction; Shape
资金
- Sasakawa Scientific Research Grant from the Japan Science Society [23-509]
The presence of macrophytes in the littoral zone provide prey animals with protection from predators. Two macrophyte characters, stem density and branching, are known to hinder predator foraging in macrophyte beds. Stem stiffness is a character that allows the macrophyte to withstand current power in the intertidal zone, but its effect on predator movements in macrophyte beds has not been studied to date. In this study I examined whether the foraging success of predators is constrained by stem stiffness, as well as stem density and the presence of branches. Artificial macrophytes were constructed using two types of rubber that differed in stiffness. The newt Cynops ensicauda popei and larvae of the damselfly Paracercion melanotum were used as predator and prey, respectively, in this model system. The results revealed that all three plant characters studied influenced the survival rate of prey. Stiff stems consistently increased the survival rate compared with flexible stems. Stem density had the highest positive influence on survival rate. The direct effect of branches was negative and minute, but it altered the dependency on stem density. Although stiffness did have an effect on the survival rate of prey, its magnitude was relatively low. The effect of stiffness in other settings should be examined in future studies.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据