The impact of nonlinear functional responses on the long-term evolution of food web structure
The impact of nonlinear functional responses on the long-term evolution of food web structure
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DOI：
10.1016/j.jtbi.2004.04.033
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发表时间：
2004-08-21
影响因子：
2
通讯作者：
Quince, C
中科院分区：
文献类型：
--
作者：
Drossel, B;McKane, AJ;Quince, C
我们研究了当使用不同类型的功能反应时，进化食物网络模型中出现的长期网络结构。我们发现，只有当种群动态允许捕食者专注于它们最好的猎物物种时，才会出现具有多个营养层的大型复杂网络。这可以利用改进的Lotka-Volterra或Holling/Beddington功能反应实现，其有效耦合取决于捕食者利用猎物的效率，或利用自适应觅食的比率依赖的功能反应。相比之下，如果使用标准的Lotka-Volterra或Holling/Beddington功能反应，长期进化产生的网络几乎所有物种都是基生的，并且这些物种之间还有许多联系。有趣的是，在所有研究的案例中，很大一部分薄弱环节是食物网进化的自然结果。(C)2004爱思唯尔有限公司。保留所有权利。
We investigate the long-term web structure emerging in evolutionary food web models when different types of functional responses are used. We find that large and complex webs with several trophic layers arise only if the population dynamics is such that it allows predators to focus on their best prey species. This can be achieved using modified Lotka-Volterra or Holling/ Beddington functional responses with effective couplings that depend on the predator's efficiency at exploiting the prey, or a ratio-dependent functional response with adaptive foraging. In contrast, if standard Lotka-Volterra or Holling/Beddington functional responses are used, long-term evolution generates webs with almost all species being basal, and with additionally many links between these species. Interestingly, in all cases studied, a large proportion of weak links result naturally from the evolution of the food webs. (C) 2004 Elsevier Ltd. All rights reserved.