Reorganization of interaction networks modulates the persistence of species in late successional stages
Reorganization of interaction networks modulates the persistence of species in late successional stages
复制标题
相互作用网络的重组调节物种在演替后期的持久性
DOI：
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发表时间：
2017
影响因子：
4.8
通讯作者：
Rudolf P. Rohr
中科院分区：
文献类型：
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作者：
Serguei Saavedra;S. Cenci;E. del‐Val;K. Boege;Rudolf P. Rohr
随着物种间相互作用在演替阶段和环境梯度上的变化，生态相互作用网络不断重组。这种重组也可能与物种改变其对其本地地点可用生态位类型的偏好的程度有关。尽管这些相互作用的变化是普遍存在的，但以往的研究表明，网络重组对网络体系结构的全局描述符(如连通性、模块化和嵌套性)的影响很小或不显著。然而，关于这些重组是否会对社区动态和组成产生影响，人们知之甚少。为了回答上述问题，我们研究了热带干旱森林次生演替阶段植物-食草动物相互作用网络的多年动态和重组。我们开发了基于结构稳定性方法的新的量化工具，以估计网络重组对物种持久性的潜在影响。然后，我们调查这种影响是否可以解释食草动物物种在观察到的群落中持续存在的可能性。我们发现，栖息(早到)的食草动物物种增加了它们在不同时间和演替阶段坚持生存的可能性。重要的是，我们证明，在后期演替阶段，栖息物种之间的相互作用的重组对定居(晚到)的草食动物的持久性具有强烈的抑制作用。这些发现支持了早先的预测，即在成熟的群落中，物种相互作用的变化可以作为群落控制机制(也称为优先效应)。此外，我们的结果表明，尽管全球网络性质是不变的，但如果不关注生态群落的重组过程，就不可能完全理解生态群落的动态和组成。
Ecological interaction networks constantly reorganize as interspecific interactions change across successional stages and environmental gradients. This reorganization can also be associated with the extent to which species change their preference for types of niches available in their local sites. Despite the pervasiveness of these interaction changes, previous studies have revealed that network reorganizations have a minimal or insignificant effect on global descriptors of network architecture, such as connectance, modularity and nestedness. However, little is known about whether these reorganizations may have an effect on community dynamics and composition. To answer the question above, we study the multi-year dynamics and reorganization of plant-herbivore interaction networks across secondary successional stages of a tropical dry forest. We develop new quantitative tools based on a structural stability approach to estimate the potential impact of network reorganization on species persistence. Then, we investigate whether this impact can explain the likelihood of persistence of herbivore species in the observed communities. We find that resident (early-arriving) herbivore species increase their likelihood of persistence across time and successional stages. Importantly, we demonstrate that, in late successional stages, the reorganization of interactions among resident species has a strong inhibitory effect on the likelihood of persistence of colonizing (late-arriving) herbivores. These findings support earlier predictions suggesting that, in mature communities, changes of species interactions can act as community-control mechanisms (also known as priority effects). Furthermore, our results illustrate that the dynamics and composition of ecological communities cannot be fully understood without attention to their reorganization processes, despite the invariability of global network properties.
影响因子：
8.8
作者：
Carboni M;Münkemüller T;Lavergne S;Choler P;Borgy B;Violle C;Essl F;Roquet C;Munoz F;DivGrass Consortium;Thuiller W
通讯作者：
Thuiller W