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Associational resistance to both insect and pathogen damage in mixed forests is modulated by tree neighbour identity and drought

hal.structure.identifierUniversity of Oxford
dc.contributor.authorFIELD, Elsa
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorCASTAGNEYROL, Bastien
hal.structure.identifierCentre for Ecology and Hydrology [Wallingford] [CEH]
dc.contributor.authorGIBBS, Melanie
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorJACTEL, Hervé
hal.structure.identifierAlice Holt Lodge
dc.contributor.authorBARSOUM, Nadia
hal.structure.identifierCentre for Ecology and Hydrology [Wallingford] [CEH]
dc.contributor.authorSCHONROGGE, Karsten
hal.structure.identifierUniversity of Oxford
dc.contributor.authorHECTOR, Andrew
dc.date2020
dc.date.issued2020
dc.identifier.issn0022-0477
dc.description.abstractEn1. Tree health declines can be caused by interactions between pests and pathogens and many studies have shown a reduction in their damage in mixed species forests compared to monocultures. Yet few authors have considered tree diversity effects on both groups simultaneously. Moreover, it is unclear whether diversity effects on tree pests and pathogens are robust to changes in abiotic conditions, such as drought. 2. We addressed tree diversity effects on foliar insect herbivory, oak powdery mildew and their interaction under contrasting water regimes in a large-scale tree diversity experiment in SW France. Using an irrigation treatment that alleviated drought conditions, we were able to experimentally assess the effects of tree diversity under contrasting abiotic environments. We surveyed plots along a richness gradient from one to four tree species, in which a focal study species of oak (Quercus robur) was mixed with other oak species (Q. pyrenaica and Q. ilex) and a taller, broadleaved species (Betula pendula). 3. Increasing tree species richness lowered leaf miner abundance, leaf chewer damage and oak powdery mildew infection, consistent with a protective effect of resource dilution. However, richness effects on leaf miners were stronger in irrigated compared to non-irrigated blocks, indicating that environmental conditions can modulate diversity effects. Separate from the effect of tree species richness, the presence of birch in a plot increased damage by leaf chewers and powdery mildew , but lowered leaf miner damage, suggesting additional tree neighbour identity effects potentially linked to modulation of microclimate. We found a negative association between leaf miner abundance and oak powdery mildew, consistent with antagonism between oak damage agents. 4. Synthesis. Overall, our study illustrates the importance of considering both tree diversity and composition (neighbour identity) in designing forests more resistant to pest and pathogen damage.
dc.description.sponsorshipDiversité et Productivité des forêTs impactées par le Changement Climatique
dc.language.isoen
dc.publisherWiley
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.subject.enBiodiversity
dc.subject.enErysiphe alphitoides
dc.subject.enMixed forest
dc.subject.enMulti-trophic interactions
dc.subject.enOak powdery mildew
dc.subject.enPlant apparency
dc.subject.enPlant vigour
dc.subject.enQuercus robur
dc.title.enAssociational resistance to both insect and pathogen damage in mixed forests is modulated by tree neighbour identity and drought
dc.typeArticle de revue
dc.identifier.doi10.1111/1365-2745.13397
dc.subject.halSciences de l'environnement
dc.subject.halSciences de l'environnement/Biodiversité et Ecologie
dc.subject.halSciences de l'environnement/Milieux et Changements globaux
bordeaux.journalJournal of Ecology
bordeaux.page1 - 12
bordeaux.peerReviewedoui
hal.identifierhal-02796042
hal.version1
hal.popularnon
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02796042v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Ecology&rft.date=2020&rft.spage=1%20-%2012&rft.epage=1%20-%2012&rft.eissn=0022-0477&rft.issn=0022-0477&rft.au=FIELD,%20Elsa&CASTAGNEYROL,%20Bastien&GIBBS,%20Melanie&JACTEL,%20Herv%C3%A9&BARSOUM,%20Nadia&rft.genre=article


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