Response of pest control by generalist predators to local-scale plant diversity: a meta-analysis
| Autor: | Philippe Tixier, Anicet G. Dassou |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
H01 - Protection des végétaux - Considérations générales
0106 biological sciences Integrated pest management Relation plante animal Biological pest control habitat Generalist and specialist species 01 natural sciences Predation Interactions biologiques specialization Trophic level Original Research Lutte antiravageur Ecology Chaîne alimentaire food and beverages respiratory system Habitat Agroécosystème Biological control L20 - Écologie animale Biodiversité predation F40 - Écologie végétale Arthropoda effect size Biocénose Biology 010603 evolutionary biology Ecology Evolution Behavior and Systematics Nature and Landscape Conservation Herbivore business.industry fungi Pest control H10 - Ravageurs des plantes herbivores Lutte biologique plant diversity Prédateur 010602 entomology pest regulation service Plante de culture business human activities local scale |
| Zdroj: | Ecology and Evolution |
| ISSN: | 2045-7758 |
| Popis: | Disentangling the effects of plant diversity on the control of herbivores is important for understanding agricultural sustainability. Recent studies have investigated the relationships between plant diversity and arthropod communities at the landscape scale, but few have done so at the local scale. We conducted a meta‐analysis of 32 papers containing 175 independent measures of the relationship between plant diversity and arthropod communities. We found that generalist predators had a strong positive response to plant diversity, that is, their abundance increased as plant diversity increased. Herbivores, in contrast, had an overall weak and negative response to plant diversity. However, specialist and generalist herbivores differed in their response to plant diversity, that is, the response was negative for specialists and not significant for generalists. While the effects of scale remain unclear, the response to plant diversity tended to increase for specialist herbivores, but decrease for generalist herbivores as the scale increased. There was no clear effect of scale on the response of generalist predators to plant diversity. Our results suggest that the response of herbivores to plant diversity at the local scale is a balance between habitat and trophic effects that vary according to arthropod specialization and habitat type. Synthesis and applications. Positive effects of plant diversity on generalist predators confirm that, at the local scale, plant diversification of agroecosystems is a credible and promising option for increasing pest regulation. Results from our meta‐analysis suggest that natural control in plant‐diversified systems is more likely to occur for specialist than for generalist herbivores. In terms of pest management, our results indicate that small‐scale plant diversification (via the planting of cover crops or intercrops and reduced weed management) is likely to increase the control of specialist herbivores by generalist predators. |
| Databáze: | OpenAIRE |
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