Horizontal and vertical diversity jointly shape food web stability against small and large perturbations.
Equilibrium
horizontal diversity
large perturbations
small perturbations
stability
vertical diversity
Journal
Ecology letters
ISSN: 1461-0248
Titre abrégé: Ecol Lett
Pays: England
ID NLM: 101121949
Informations de publication
Date de publication:
Jul 2019
Jul 2019
Historique:
received:
28
01
2019
revised:
19
02
2019
accepted:
22
04
2019
pubmed:
17
5
2019
medline:
8
8
2019
entrez:
17
5
2019
Statut:
ppublish
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.
Identifiants
pubmed: 31095883
doi: 10.1111/ele.13282
pmc: PMC6852190
doi:
Types de publication
Letter
Langues
eng
Pagination
1152-1162Subventions
Organisme : China Scholarship Council
ID : 201606190229
Informations de copyright
© 2019 The Authors. Ecology Letters published by CNRS and John Wiley & Sons Ltd.
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