Interactive effects of body-size structure and adaptive foraging on food-web stability
Interactive effects of body-size structure and adaptive foraging on food-web stability
复制标题
DOI：
10.1111/j.1461-0248.2011.01733.x
复制
发表时间：
2012-03-01
期刊：
影响因子：
8.8
通讯作者：
Guill, Christian
中科院分区：
文献类型：
--
作者：
Heckmann, Lotta;Drossel, Barbara;Guill, Christian
食物网的体型结构和消费者的适应性觅食是我们理解自然生态系统如何维持其稳定性和多样性的两个主导概念。然而，这两个进程的相互作用是一个至关重要但尚未解决的问题。为了填补这一空白，在我们的知识生态系统的稳定性，我们调查动态随机和生态位模型的食物网，以评估持久性物种的比例。我们表明，更强的身体大小的结构和更快的适应稳定这些食物网。身体大小的结构产生稳定的配置的相互作用强度分布在整个食物网，和适应性觅食强调资源更接近基地的联系。此外，这两种机制结合起来具有累积效应。最重要的是，非结构化的随机网络通过适应性觅食演变成稳定的大小结构的食物网。这提供了一个机制的解释如何大小结构适应性地出现在复杂的食物网，从而建立一个新的桥梁，这两个重要的稳定机制。
Body-size structure of food webs and adaptive foraging of consumers are two of the dominant concepts of our understanding how natural ecosystems maintain their stability and diversity. The interplay of these two processes, however, is a critically important yet unresolved issue. To fill this gap in our knowledge of ecosystem stability, we investigate dynamic random and niche model food webs to evaluate the proportion of persistent species. We show that stronger body-size structures and faster adaptation stabilise these food webs. Body-size structures yield stabilising configurations of interaction strength distributions across food webs, and adaptive foraging emphasises links to resources closer to the base. Moreover, both mechanisms combined have a cumulative effect. Most importantly, unstructured random webs evolve via adaptive foraging into stable size-structured food webs. This offers a mechanistic explanation of how size structure adaptively emerges in complex food webs, thus building a novel bridge between these two important stabilising mechanisms.