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Master Thesis

Évaluation de l’intérêt pour les abeilles domestiques, les cailles des blés et les perdrix grises de systèmes agricoles innovants et d’espaces semi-naturels

Abstract : The agrosystem of Mont Choisy (Champagne Crayeuse) is defined by a large agricultural area stripped of semi-natural areas (SNA). SNAs are necessary for the reproduction of several species of the plains’ fauna. These areas also allow the development of insects including the honeybee providing various ecosystem services such as crop pollination. The pollen and nectar supply of the Mont Choisy agro-ecosystem and the pollen harvest by its honey bees (Apis mellifera) were studied, as well as the available biomass for gray partridge (Perdrix perdrix) and common quail (Cortunix cortunix) chicks of 6 innovative cropping systems (CS). Agricultural production occupies 89% of the territory monitored, wheat and beet together account for 46.5%. The end of flowering of the rapeseed causes a fall of 90% of the pollen supply in June and 80% in July. SNAs account for 7.9% of which 4.1% are woods not flowering July. The pollens collected by honey bee colonies come from different sources, with up to 73% differences. Thistles, mayweeds, mignonettes and poppies are species considered as weeds but are major pollen sources, up to 73% of the collected pollen. The 'Couverts permanents' and 'AutoN' CSs, which have been sown directly are sources of available biomass up to 5.5 and 3.2 times higher than the 'Référence optimisée' CS being the representative system of the Champagne Crayeuse agricultural systems. An increase in the number of ESN associated with an optimization of the implanted species as well as a modification of the agricultural practices appears therefore essential to the recrudescence of the populations of quail of the wheats, gray partridges and honeybees in Champagne Crayeuse.
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Master Thesis
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Charles Blancher. Évaluation de l’intérêt pour les abeilles domestiques, les cailles des blés et les perdrix grises de systèmes agricoles innovants et d’espaces semi-naturels. Sciences du Vivant [q-bio]. 2019. ⟨dumas-02451314⟩

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