Although ecological networks are usually considered a static representation of species' interactions, the interactions can change when the preferred partners are absent (rewiring). In mutualistic networks, rewiring with non-preferred partners can palliate extinction cascades, contributing to communities' stability. In spite of its significance, whether general patterns can shape the rewiring of ecological interactions remains poorly understood. Here, we show a phylogenetic constraint in the rewiring of mycorrhizal networks, so that rewired interactions (i.e., with non-preferred hosts) tend to involve close relatives of preferred hosts. Despite this constraint, rewiring increases the robustness of the fungal community to the simulated loss of their host species. We identify preferred and non-preferred hosts based on the probability that, when the two partners co-occur, they actually interact. Understanding general patterns in the rewiring of interactions can improve our predictions of community responses to interactions' loss, which influences how global changes will affect ecosystem stability.

中文翻译：

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菌根-植物相互作用网络中的系统发育重新布线增加了自然破碎景观中的群落稳定性。

尽管生态网络通常被认为是物种相互作用的静态表示，但当首选伙伴不存在（重新布线）时，相互作用可能会发生变化。在互惠网络中，与非首选合作伙伴重新布线可以缓解灭绝级联，有助于社区的稳定。尽管具有重要意义，但人们对一般模式是否能够重塑生态相互作用仍知之甚少。在这里，我们展示了菌根网络重新布线的系统发育限制，因此重新布线的相互作用（即与非首选宿主）往往涉及首选宿主的近亲。尽管存在这种限制，重新布线仍增加了真菌群落对其宿主物种的模拟损失的鲁棒性。我们根据以下概率来识别首选和非首选主机：当两个伙伴同时发生时，他们实际上是相互作用的。了解相互作用重新布线的一般模式可以改善我们对社区对相互作用损失的反应的预测，这会影响全球变化如何影响生态系统的稳定性。