Effects of agricultural intensification on ability of natural enemies to control aphids

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dc.contributor.authorZhao, Zi-Huaen_ZA
dc.contributor.authorHui, Cangen_ZA
dc.contributor.authorHe, Da-Hanen_ZA
dc.contributor.authorLi, Bai-Lianen_ZA
dc.date.accessioned2016-11-28T09:00:37Z
dc.date.available2016-11-28T09:00:37Z
dc.date.issued2015-01-26
dc.descriptionCITATION: Zhao, Z-H., Hui, C., He, D-H. & Li, B-L. 2015. Effects of agricultural intensification on ability of natural enemies to control aphids. Scientific Reports, 5:8024, doi:10.1038/srep08024.
dc.descriptionThe original publication is available at http://www.nature.com/srep
dc.description.abstractAgricultural intensification through increasing fertilization input and cropland expansion has caused rapid loss of semi-natural habitats and the subsequent loss of natural enemies of agricultural pests. It is however extremely difficult to disentangle the effects of agricultural intensification on arthropod communities at multiple spatial scales. Based on a two-year study of seventeen 1500 m-radius sites, we analyzed the relative importance of nitrogen input and cropland expansion on cereal aphids and their natural enemies. Both the input of nitrogen fertilizer and cropland expansion benefited cereal aphids more than primary parasitoids and leaf-dwelling predators, while suppressing ground-dwelling predators, leading to an disturbance of the interspecific relationship. The responses of natural enemies to cropland expansion were asymmetric and species-specific, with an increase of primary parasitism but a decline of predator/pest ratio with the increasing nitrogen input. As such, agricultural intensification (increasing nitrogen fertilizer and cropland expansion) can destabilize the interspecific relationship and lead to biodiversity loss. To this end, sustainable pest management needs to balance the benefit and cost of agricultural intensification and restore biocontrol service through proliferating the role of natural enemies at multiple scales.en_ZA
dc.description.urihttp://www.nature.com/articles/srep08024
dc.description.versionPublisher's version
dc.format.extent7 pages
dc.identifier.citationZhao, Z-H., Hui, C., He, D-H. & Li, B-L. 2015. Effects of agricultural intensification on ability of natural enemies to control aphids. Scientific Reports, 5:8024, doi:10.1038/srep08024.
dc.identifier.issn2045-2322 (online)
dc.identifier.otherdoi:10.1038/srep08024
dc.identifier.urihttp://hdl.handle.net/10019.1/99910
dc.language.isoen_ZAen_ZA
dc.publisherSpringer Nature
dc.rights.holderAuthors retain copyright
dc.subjectAgricultural intensificationen_ZA
dc.subjectAphids -- Biological controlen_ZA
dc.subjectBiomathematicsen_ZA
dc.subjectBiological pest control agentsen_ZA
dc.subjectNitrogen in agriculture -- Environmental aspectsen_ZA
dc.titleEffects of agricultural intensification on ability of natural enemies to control aphidsen_ZA
dc.typeArticleen_ZA
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