Flexible components of functional responses.
Flexible components of functional responses.
复制标题
功能反应的灵活组成部分。
DOI：
--
复制
发表时间：
2012
影响因子：
4.8
通讯作者：
T. Okuyama
中科院分区：
文献类型：
--
作者：
T. Okuyama
1.捕食者的功能反应描述了捕食者消耗猎物的速度，是群落动态的重要决定因素。尽管重要性，大多数实证研究已经考虑了有限数量的功能反应模型。此外，模型往往作出强有力的假设模式的捕食过程中，即使功能反应可能会表现出各种各样的模式。2.除了有限的模型考虑，功能反应模型的模型选择不能梳理除了捕食的组件（即捕获率和处理时间）时，考虑灵活的性状，因为它总是可能的，许多不同的组合的捕获率和处理时间可以导致相同的捕食率。3.本研究直接考察了螨类群落功能反应的捕获率和处理时间。为了避免模型选择问题，收集了搜索和处理行为数据。模型选择直接应用于这两个组成部分的捕食数据。比较了常用的功能反应模型和允许更灵活模式的模型。4.结果表明，常用模型的假设不支持的数据，并选择了一个灵活的模型作为最佳模型。这些结果表明，需要考虑更广泛的各种捕食模式时，功能反应的特点。在没有做出强有力的假设（例如静态处理时间）的情况下，功能反应模型的模型选择不能用于对捕食机制做出可靠的推断。
1. The functional response of predators describes the rate at which a predator consumes prey and is an important determinant of community dynamics. Despite the importance, most empirical studies have considered a limited number of models of functional response. In addition, the models often make strong assumptions about the pattern of predation processes, even though functional responses can potentially exhibit a wide variety of patterns. 2. In addition to the limited model consideration, model selections of functional response models cannot tease apart the components of predation (i.e. capture rate and handling time) when flexible traits are considered because it is always possible that many different combinations of the capture rate and handling time can lead to the same predation rate. 3. This study directly examined the capture rate and handling time of functional response in a mite community. To avoid the model selection problem, the searching and handling behaviour data were collected. The model selection was applied directly to these two components of predation data. Commonly used functional response models and models that allow for more flexible patterns were compared. 4. The results indicated that assumptions of the commonly used models were not supported by the data, and a flexible model was selected as the best model. These results suggest the need to consider a wider variety of predation patterns when characterizing a functional response. Without making a strong assumption (e.g. static handling time), model selections on functional response models cannot be used to make reliable inferences on the predation mechanisms.