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Plant apparency, an overlooked driver of associational resistance to insect herbivory

hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorCASTAGNEYROL, Bastien
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorGIFFARD, Brice
ORCID: 0000-0003-4367-1245
IDREF: 156491966
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorPERE, Christelle
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorJACTEL, Herve
dc.date.accessioned2022-10-12T12:52:47Z
dc.date.available2022-10-12T12:52:47Z
dc.date.issued2013
dc.identifier.issn0022-0477
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/157387
dc.description.abstractEn1- Herbivore regulation is one of the services provided by plant diversity in terrestrial ecosystems. It has been suggested that tree diversity decreases insect herbivory in forests, but recent studies have reported opposite patterns, indicating that tree diversity can trigger associational resistance or susceptibility. The mechanisms underlying the tree diversity–resistance relationship thus remain a matter of debate. 2- We assessed insect herbivory on pedunculate oak saplings (Quercus robur) in a large-scale experiment in which we manipulated tree diversity and identity by mixing oaks, birch and pine species. 3- Tree diversity at the plot scale had no effect on damage due to leaf chewers, but abundance of leaf miners decreased with increasing tree diversity. The magnitude of this associational resistance increased with host dilution, consistent with the ‘resource concentration hypothesis’. 4- At a smaller scale, we estimated tree apparency as the difference in total height between focal oak saplings and their nearest neighbouring trees. Levels of oak infestation with leaf miners decreased significantly with decreasing tree apparency. As the probability of having taller neighbours increased with tree diversity, notably due to the increase in the proportion of faster growing nonhost trees, such as birches and pines, tree apparency may be seen as a ‘hidden’, sampling effect of tree diversity. 5- Synthesis. These findings suggest that greater host dilution and lower tree apparency contribute to associational resistance in young trees. They also highlight the importance of taking plant size into account as a covariate, to avoid misleading interpretations about the biodiversity–resistance relationship.
dc.language.isoen
dc.publisherWiley
dc.subjectplant–herbivore interactions
dc.subjectresource concentration
dc.subject.enphylogenetic diversity
dc.subject.entree apparency
dc.subject.enbiodiversity
dc.subject.enforest
dc.subject.enfunctional diversity
dc.subject.enleaf chewers
dc.subject.enleaf miners
dc.title.enPlant apparency, an overlooked driver of associational resistance to insect herbivory
dc.typeArticle de revue
dc.identifier.doi10.1111/1365-2745.12055
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalJournal of Ecology
bordeaux.page418-429
bordeaux.volume101
bordeaux.hal.laboratoriesBioGeCo (Biodiversité Gènes & Communautés) - UMR 1202*
bordeaux.issue2
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02648889
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02648889v1
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