Effect of the canopy complexity of trees on the rate of predation of insects
Effect of the canopy complexity of trees on the rate of predation of insects
复制标题
树木冠层复杂性对昆虫捕食率的影响
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Pavel Kindlmann
中科院分区：
文献类型：
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作者：
Jan Šipoš;Jan Šipoš;Pavel Kindlmann
树冠的复杂性对捕食者生物控制树栖食草昆虫的有效性的影响一直被忽视。一个复杂的冠层提供了更大的各种资源比一个简单的冠层，这可能会导致在复杂的冠层和更高的捕食率的食草动物和捕食者的丰度增加。另一方面，在树冠复杂的树木中可能更难定位猎物，这可能会降低捕食率。本研究的主要目的是确定捕食率和冠层复杂性之间的关系。我们使用了一个系统，包括石灰树，幼虫的绿头苍蝇作为猎物和自然发生的捕食者（主要是鸟类和蚂蚁）。12的石灰树的树冠的复杂性减少修剪，并通过记录的猎物的命运确定捕食率固定在每棵树上30分钟几次，在一年的过程中。捕食率与林冠复杂度呈负相关。我们将这些结果与文献中报道的结果进行比较，并得出结论，捕食率和冠层复杂性之间的负相关关系是一种常见的现象，可以预期，不仅在伏击，而且在捕食者，积极寻找猎物的研究报告。
The effect of the complexity of tree canopies on the effectiveness of biological control of tree‐dwelling insect herbivores by predators has been neglected. A complex canopy provides a greater variety of resources than a simple canopy, which may result in an increase in the abundance of both herbivores and predators in complex canopies and a higher predation rate. On the other hand, it may be more difficult to locate prey in trees with a complex canopy, which may lower the predation rate. The main aim of this study is to determine the relationship between predation rate and canopy complexity. We have used a system consisting of lime trees, larvae of blowflies as prey and naturally occurring predators (mainly birds and ants). The complexity of the canopy of 12 of the lime trees was reduced by pruning, and the predation rate was determined by recording the fate of prey pinned on each of the trees for 30 min several times during the course of a year. The predation rate was negatively associated with canopy complexity. We compare these results with those reported in the literature and contrary to the widely held view conclude that a negative relationship between predation rate and canopy complexity is a common phenomenon and can be expected to be reported in studies not only on ambush but also on predators that actively search for prey.