Horizontal and vertical diversity jointly shape food web stability against small and large perturbations

Qinghua Zhao, Paul J. Van den Brink, Camille Carpentier, Yingying X.G. Wang, Pablo Rodríguez-Sánchez, Chi Xu, Silke Vollbrecht, Frits Gillissen, Marlies Vollebregt, Shaopeng Wang, Frederik De Laender

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Résumé

The biodiversity of food webs is composed of horizontal (i.e. within trophic levels) and vertical diversity (i.e. the number of trophic levels). Understanding their joint effect on stability is a key challenge. Theory mostly considers their individual effects and focuses on small perturbations near equilibrium in hypothetical food webs. Here, we study the joint effects of horizontal and vertical diversity on the stability of hypothetical (modelled) and empirical food webs. In modelled food webs, horizontal and vertical diversity increased and decreased stability, respectively, with a stronger positive effect of producer diversity on stability at higher consumer diversity. Experiments with an empirical plankton food web, where we manipulated horizontal and vertical diversity and measured stability from species interactions and from resilience against large perturbations, confirmed these predictions. Taken together, our findings highlight the need to conserve horizontal biodiversity at different trophic levels to ensure stability.

langue originaleAnglais
Pages (de - à)1152-1162
Nombre de pages11
journalEcology Letters
Volume22
Numéro de publication7
Les DOIs
Etat de la publicationPublié - 1 juil. 2019

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    Zhao, Q., Van den Brink, P. J., Carpentier, C., Wang, Y. X. G., Rodríguez-Sánchez, P., Xu, C., Vollbrecht, S., Gillissen, F., Vollebregt, M., Wang, S., & De Laender, F. (2019). Horizontal and vertical diversity jointly shape food web stability against small and large perturbations. Ecology Letters, 22(7), 1152-1162. https://doi.org/10.1111/ele.13282