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Neighboring plants and core herbivores determine the importance of Swietenia macrophylla in the plant–herbivore network

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Abstract

Species contribute differently to the structure and stability of networks of interacting species. However, species contributions to the importance of other species is usually neglected, thus limiting our understanding of species dynamics beyond the general network structure. We combined knowledge on diversity effects on focal species and network ecology to analyze the influence of plants and herbivores on big-leaf mahogany's (Swietenia macrophylla) importance in the plant–herbivore network. To this end, we built interaction networks using information from a large-scale tree diversity experiment and performed computer simulations of species removal with redistribution of interactions. We compared the importance of big-leaf mahogany in the observed networks to simulated networks where we removed: (a) tree species with similar beetle assemblages to mahogany, (b) the most interconnected (core) tree species and (c) the core beetle species. Removal of the core and similar tree species increased the importance of mahogany, whereas eliminating core beetle species decreased it. Interestingly, the effect of core tree species on mahogany’s importance was mediated by core beetles (R2 = 0.46). Neither tree nor core beetle species’ effects were contingent on tree species richness or abundance. These results indicate that highly connected tree and herbivore species jointly determine the role of mahogany in the plant–herbivore network. Likewise, these results provide insight into the effect of tree species composition and highly interactive herbivores in shaping the role of species in the herbivore network.

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All data produced from this study are provided in this manuscript as supplementary material.

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Acknowledgements

We are thankful to INIFAP who provided logistic accommodations and infrastructure for the establishment of the experiment, subsequent sampling, and maintenance. We would like to thank to R. Anderson, A.R. Cline, P. Cifuentes, M.L. Gimmel, T.L. Grzymala, R. Jones, P. Leblanc, S. López, G.M. Rodríguez Mirón, V.H. Toledo and M.L. Zurita García for their help with the identifications. We are grateful to N. Celaya, E. Fonseca, A. González, V. Hernández, D. Marrufo, D. Medellín, P. Medina, R. Mena, O. Orozco, T. Quijano, N. Salinas, V. Solís, P. Téllez and J. Tun for field assistance. We thank T. Timberlake for proof reading the manuscript. We thank the reviewers for their valuable suggestions and comments that greatly improved the quality of the manuscript.

Funding

CONACyT grant awarded to VPT and LAR (128856).

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Contributions

EVG formulated the idea and analyzed the data. LA-R and VP-T conceived and designed the experimental site. JQ and MJC-N designed and conducted fieldwork. EVG wrote the manuscript with input from LA-R and VP-T; other authors provided editorial advice.

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Correspondence to Edith Villa-Galaviz.

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“All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.”

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Villa-Galaviz, E., Abdala-Roberts, L., Quinto, J. et al. Neighboring plants and core herbivores determine the importance of Swietenia macrophylla in the plant–herbivore network. Arthropod-Plant Interactions 16, 387–399 (2022). https://doi.org/10.1007/s11829-022-09906-z

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  • DOI: https://doi.org/10.1007/s11829-022-09906-z

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