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Pollen beetle mortality is increased by ground-dwelling generalist predators but not landscape complexity

hal.structure.identifierDepartment of Ecology
dc.contributor.authorRIGGI, Laura G.
hal.structure.identifierCommonwealth Scientific and Industrial Research Organisation [Canberra] [CSIRO]
dc.contributor.authorGAGIC, Vesna
hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorRUSCH, Adrien
hal.structure.identifierDepartment of Ecology
dc.contributor.authorMALSHER, Gerard
hal.structure.identifierDepartment of Ecology
dc.contributor.authorEKBOM, Barbara
hal.structure.identifierDepartment of Ecology
dc.contributor.authorBOMMARCO, Riccardo
dc.date.accessioned2024-04-08T12:34:05Z
dc.date.available2024-04-08T12:34:05Z
dc.date.issued2017
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/197241
dc.description.abstractEnBiological control of crop pests by naturally occurring arthropods depends on the entire community of natural enemies, but generalist predators and parasitoids are rarely considered in the same study. Also, the level of biological control in the field is affected by both within-field and landscape scale management. A multi-taxa approach that integrates multiple scales of management is needed to understand drivers for pest mortality. We examined local (weed cover and soil characteristics) and landscape (proportions of semi-natural and oilseed rape habitat) effects on natural enemy communities and biological control of pollen beetles in 15 oilseed rape (OSR) fields in Sweden. We found that agricultural intensification at the local (low weed cover) and landscape scale (low proportion of semi-natural area) increased evenness of generalist predators, but had no effect on the densities of pests and their natural enemies. This suggests that the generalist predators in OSR are well adapted to crop lands, at least within the examined gradient. Increasing OSR in the landscape decreased parasitoid densities and increased pest density, indicating a potential loss of pest control services by specialist natural enemies in landscapes with a high proportion of OSR. Finally, pollen beetle mortality increased with ground dwelling generalist predator abundance and soil clay content. Parasitism rates did not affect pest mortality, which is interesting as parasitoids have been considered major control agents in OSR. The hypothesis that increasing semi-natural habitat in the landscape enhances natural enemy abundances and species richness in agricultural landscapes was not supported. Local measures targeting generalist predators appear as a reasonable strategy to maximize pollen beetle control.
dc.language.isoen
dc.publisherElsevier
dc.subjectnatural enemies
dc.subject.enMeligethes aeneus
dc.subject.enBrassica napus
dc.subject.enintermediate landscape complexity hypothesis
dc.subject.enpredator community
dc.subject.enbiological control
dc.title.enPollen beetle mortality is increased by ground-dwelling generalist predators but not landscape complexity
dc.typeArticle de revue
dc.identifier.doi10.1016/j.agee.2017.06.039
dc.subject.halSciences du Vivant [q-bio]
dc.subject.halSciences de l'environnement
bordeaux.journalAgriculture, Ecosystems & Environment
bordeaux.page133-142
bordeaux.volume250
bordeaux.hal.laboratoriesSanté et Agro-Ecologie du Vignoble (SAVE) - UMR 1065*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02627643
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02627643v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Agriculture,%20Ecosystems%20&%20Environment&rft.date=2017&rft.volume=250&rft.spage=133-142&rft.epage=133-142&rft.au=RIGGI,%20Laura%20G.&GAGIC,%20Vesna&RUSCH,%20Adrien&MALSHER,%20Gerard&EKBOM,%20Barbara&rft.genre=article


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