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Tree diversity drives associational resistance to herbivory at both forest edge and interior

hal.structure.identifierDynamiques Forestières dans l'Espace Rural [DYNAFOR]
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorGUYOT, Virginie
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorJACTEL, Herve
hal.structure.identifierDynamiques Forestières dans l'Espace Rural [DYNAFOR]
dc.contributor.authorIMBAUD, Baptiste
hal.structure.identifierDynamiques Forestières dans l'Espace Rural [DYNAFOR]
dc.contributor.authorBURNEL, Laurent
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorCASTAGNEYROL, Bastien
hal.structure.identifierDynamiques Forestières dans l'Espace Rural [DYNAFOR]
dc.contributor.authorHEINTZ, Wilfried
hal.structure.identifierDynamiques Forestières dans l'Espace Rural [DYNAFOR]
dc.contributor.authorDECONCHAT, Marc
hal.structure.identifierDynamiques Forestières dans l'Espace Rural [DYNAFOR]
hal.structure.identifierDynamiques et écologie des paysages agriforestiers [DYNAFOR]
dc.contributor.authorVIALATTE, Aude
dc.date.issued2019
dc.description.abstractEnTree diversity is increasingly acknowledged as an important driver of insect herbivory. However, there is still a debate about the direction of associational effects that can range from associational resistance (i.e., less damage in mixed stands than in monocultures) to the opposite, associational susceptibility. Discrepancies among published studies may be due to the overlooked effect of spatially dependent processes such as tree location within forests. We addressed this issue by measuring crown defoliation and leaf damage made by different guilds of insect herbivores on oaks growing among conspecific versus heterospecific neighbors at forest edges versus interior, in two closed sites in SW France forests. Overall, oaks were significantly less defoliated among heterospecific neighbors (i.e., associational resistance), at both forest edge and interior. At the leaf level, guild diversity and leaf miner herbivory significantly increased with tree diversity regardless of oak location within stands. Other guilds showed no clear response to tree diversity or oak location. We showed that herbivore response to tree diversity varied among insect feeding guilds but not between forest edges and interior, with inconsistent patterns between sites. Importantly, we show that oaks were more defoliated in pure oak plots than in mixed plots at both edge and forest interior and that, on average, defoliation decreased with increasing tree diversity from one to seven species. We conclude that edge conditions could be interacting with tree diversity to regulate insect defoliation, but future investigations are needed to integrate them into the management of temperate forests, notably by better understanding the role of the landscape context.
dc.language.isoen
dc.publisherWiley Open Access
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.subject.enecosystem functioning
dc.subject.enforest edge
dc.subject.eninsect herbivory
dc.subject.enplant diversity
dc.title.enTree diversity drives associational resistance to herbivory at both forest edge and interior
dc.typeArticle de revue
dc.identifier.doi10.1002/ece3.5450
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalEcology and Evolution
bordeaux.page1-12
bordeaux.peerReviewedoui
hal.identifierhal-02268916
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02268916v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Ecology%20and%20Evolution&rft.date=2019&rft.spage=1-12&rft.epage=1-12&rft.au=GUYOT,%20Virginie&JACTEL,%20Herve&IMBAUD,%20Baptiste&BURNEL,%20Laurent&CASTAGNEYROL,%20Bastien&rft.genre=article


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