Phylogenetic reconstruction of ancestral ecological networks through time for pierid butterflies and their host plants,Ecology Letters

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Phylogenetic reconstruction of ancestral ecological networks through time for pierid butterflies and their host plants
Ecology Letters ( IF 7.6 ) Pub Date : 2021-07-23 , DOI: 10.1111/ele.13842
Mariana P Braga _{1,

2} , Niklas Janz ₁ , Sören Nylin ₁ , Fredrik Ronquist ₃ , Michael J Landis ₂

Affiliation

The study of herbivorous insects underpins much of the theory that concerns the evolution of species interactions. In particular, Pieridae butterflies and their host plants have served as a model system for studying evolutionary arms races. To learn more about the coevolution of these two clades, we reconstructed ancestral ecological networks using stochastic mappings that were generated by a phylogenetic model of host-repertoire evolution. We then measured if, when, and how two ecologically important structural features of the ancestral networks (modularity and nestedness) evolved over time. Our study shows that as pierids gained new hosts and formed new modules, a subset of them retained or recolonised the ancestral host(s), preserving connectivity to the original modules. Together, host-range expansions and recolonisations promoted a phase transition in network structure. Our results demonstrate the power of combining network analysis with Bayesian inference of host-repertoire evolution to understand changes in complex species interactions over time.

中文翻译：

蝶蝶及其寄主植物祖先生态网络的系统发育重建

对食草昆虫的研究支持了有关物种相互作用进化的大部分理论。特别是，粉蝶科蝴蝶及其寄主植物已成为研究进化军备竞赛的模型系统。为了更多地了解这两个进化枝的共同进化，我们使用由宿主 - 库进化的系统发育模型生成的随机映射重建了祖先生态网络。然后，我们测量了祖先网络的两个生态上重要的结构特征（模块化和嵌套性）是否、何时以及如何随时间演变。我们的研究表明，随着 pierids 获得新宿主并形成新模块，它们的一个子集保留或重新殖民祖先宿主，保持与原始模块的连接。一起，宿主范围的扩展和重新殖民促进了网络结构的相变。我们的结果证明了将网络分析与贝叶斯推断宿主 - 曲目进化相结合的力量，以了解复杂物种相互作用随时间的变化。

更新日期：2021-09-09

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