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Master Thesis

À l'échelle d'une exploitation agricole, évaluation de l'impact de pratiques agronomiques et d'aménagements paysagers sur l'abondance et la diversité de Carabidés

Abstract : We managed to understand how agricultural practices and landscaping could influence the populations of Carabid beetles of cultivated plots in a farm. For this, we set up a pitfall trap protocol. It turned out that in plots of wheat, depending on the distance to the hedge rows, species assemblages of Carabid beetles differ in contrast to the overall density and species richness. In contrast, density and species richness were lower in the hedges. It turns out that these hedgerows are also responsible for the presence of forest species in plots up to 70 meters. In a second experimentation, an application of deltamethrin and thiacloprid negatively affected the overall density of Carabid beetles without apparently affected species richness. The overall resilience was 2 weeks. The nature of the effect (mortality, migration or decreased activity) could not be identified. Effects were different depending on the species: Poecilus cupreus was affected unlike Loricera pilicornis. Finally, we have not been able to demonstrate a possible effect of the application mode of an anti-slug on Carabid beetles populations. Natural variability intra and inter plots was too large and the protocol must be improved.
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Master Thesis
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Submitted on : Thursday, December 11, 2014 - 10:07:26 AM
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Arnaud Roncier. À l'échelle d'une exploitation agricole, évaluation de l'impact de pratiques agronomiques et d'aménagements paysagers sur l'abondance et la diversité de Carabidés. Sciences agricoles. 2014. ⟨dumas-01093755⟩

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