Different modelling approaches have been used to relate the structure of mutualistic interactions with the stability of communities. However, inconsistencies arise when we compare modelling outcomes with the patterns of interactions observed in empirical studies. To shed light on these inconsistencies, we explored the network structure–stability relationship by incorporating the cost of mutualistic interactions, a long ignored feature of mutualisms, into population dynamics models. We assessed the changes in the relationship between network structure (species richness, connectance, modularity) and community stability (species persistence, resilience), and between network structure and community structural attributes (average abundance), using models with increasing levels of cost for mutualistic communities. We found that adding the potential cost of mutualistic interactions affected the strength of the network structure–stability relationship. Our results revive the question of whether the structure of mutualistic networks determines community stability.

中文翻译：

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没有免费的午餐：互动成本以及互惠网络的结构和稳定性

已经使用了不同的建模方法来将互惠互动的结构与社区的稳定性联系起来。但是，当我们将建模结果与实证研究中观察到的相互作用模式进行比较时，会出现不一致的情况。为了阐明这些不一致之处，我们通过将交互作用（一种长期以来被忽视的特征）纳入人口动态模型，探索了网络结构与稳定性之间的关系。我们使用相互关系成本增加的模型，评估了网络结构（物种丰富度，连通性，模块性）与社区稳定性（物种持久性，弹性）之间以及网络结构与社区结构属性（平均丰度）之间关系的变化。社区。我们发现，增加相互影响的潜在成本会影响网络结构-稳定性关系的强度。我们的结果重提了互惠网络的结构是否决定社区稳定性的问题。