Potential oscillators and keystone modules in food webs
Potential oscillators and keystone modules in food webs
复制标题
食物网中的潜在振荡器和基石模块
DOI：
10.1111/ele.13099
复制
发表时间：
2018
期刊：
影响因子：
8.8
通讯作者：
McCann Kevin S.
中科院分区：
文献类型：
--
作者：
Kadoya Taku;Gellner Gabriel;McCann Kevin S.
食物网理论认为，弱相互作用的位置是至关重要的，因此在某些条件下，即使一个位置良好的弱相互作用也可以稳定多个强相互作用。这一理论表明，复杂的稳定网络可能是从关键的弱相互作用建立起来的，因此即使移除一个到几个Keystone相互作用也可以对整个系统的多样性和结构产生重大的级联影响。然而，来自模块化食物网成分理论的弱相互作用与来自经验结果的关键物种之间的联系还没有被很好地理解。在这里，我们开发了数值技术来检测隐藏在复杂食物网中的潜在振荡器，并表明，在随机和真实的食物网中，Keystone消费者与资源的相互作用通常会起到稳定它们的作用。令人担忧的是，这一结果表明，即使失去一个或几个相互作用较弱的物种，大自然也可能经常危险地接近陡峭的变化。
Food web theory suggests that the placement of a weak interaction is critical such that under some conditions even one well‐placed weak interaction can stabilise multiple strong interactions. This theory suggests that complex stable webs may be built from pivotal weak interactions such that the removal of even one to a few keystone interactions can have significant cascading impacts on whole system diversity and structure. However, the connection between weak interactions, derived from the theory of modular food web components, and keystone species, derived from empirical results, is not yet well understood. Here, we develop numerical techniques to detect potential oscillators hidden in complex food webs, and show that, both in random and real food webs, keystone consumer–resource interactions often operate to stabilise them. Alarmingly, this result suggests that nature frequently may be dangerously close to precipitous change with even the loss of one or a few weakly interacting species.