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Pest damage in mixed forests: Disentangling the effects of neighbor identity, host density and host apparency at different spatial scales

hal.structure.identifierEcosystèmes, biodiversité, évolution [Rennes] [ECOBIO]
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDAMIEN, Maxime
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorJACTEL, Hervé
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorMEREDIEU, Céline
hal.structure.identifierAtlantic European Regional Office of the European Forest Institute [EFIATLANTIC]
dc.contributor.authorRÉGOLINI, Margot
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorVAN HALDER, Inge
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorCASTAGNEYROL, Bastien
dc.date.issued2016-10
dc.identifier.issn0378-1127
dc.description.abstractEnMixed forests are thought to be less prone to pest insect damage than monocultures. This may result from reduced host availability (i.e., density effect) or from non-host trees reducing the physical or chemical apparency of host trees (i.e., associational resistance, AR). However, associational and density effects are often confounded in mixed forests. We aimed to disentangle their relative contribution to attacks of pine trees by a specialist pest, the pine processionary moth (PPM, Thaumetopoea pityocampa). We assessed pine infestation by PPM by counting the number of winter nests during three consecutive years along an experimental gradient of pine density in presence or absence of a fast growing species, namely birch. The total number of PPM nests per plot increased with pine density (maximum in high density monocultures), while the proportion of attacked pine trees decreased along the same gradient. Birch provided associational resistance via reduced pine apparency due to their greatest higher. This mechanism occurred at two spatial scales, whenever birch was planted within pine plots or in adjacent plots. Associational resistance was stronger in dense stands, probably due to reduced distance between pines and neighboring birches. But AR faded with time, pines becoming taller than birches, making density effects preeminent over apparency effects. Our findings suggest that mixing tree species to trigger resistance to pest insects requires taking into account the relative growth rate of associated species together with the relative proportion of associated species, both within and between stands. © 2016 Elsevier B.V.
dc.language.isoen
dc.publisherElsevier
dc.subject.enBiodiversity
dc.subject.enDensity effects
dc.subject.enFast-growing species
dc.subject.enInsect herbivory
dc.subject.enPine processionary moth
dc.subject.enPinus pinaster
dc.subject.enForestry
dc.subject.enBetula
dc.subject.enHexapoda
dc.subject.enRelative contribution
dc.subject.enRelative growth rate
dc.subject.enThaumetopoea pityocampa
dc.title.enPest damage in mixed forests: Disentangling the effects of neighbor identity, host density and host apparency at different spatial scales
dc.typeArticle de revue
dc.identifier.doi10.1016/j.foreco.2016.07.025
dc.subject.halSciences du Vivant [q-bio]/Ecologie, Environnement
bordeaux.journalForest Ecology and Management
bordeaux.page103-110
bordeaux.volume378
bordeaux.peerReviewedoui
hal.identifierhal-01371826
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01371826v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Forest%20Ecology%20and%20Management&rft.date=2016-10&rft.volume=378&rft.spage=103-110&rft.epage=103-110&rft.eissn=0378-1127&rft.issn=0378-1127&rft.au=DAMIEN,%20Maxime&JACTEL,%20Herv%C3%A9&MEREDIEU,%20C%C3%A9line&R%C3%89GOLINI,%20Margot&VAN%20HALDER,%20Inge&rft.genre=article


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