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Master Thesis

Azuré des Mouillères (Maculinea alcon alcon) et « Landes de Lessay » : milieux favorables et possibilités de déplacement hors-site Natura 2000

Abstract : Alcon Blue, as the others species of Maculinea butterflies, suffers from habitat fragmentation which drives an isolation of its populations. Isolation makes Alcon Blue's stations very vulnerable at every modification of its habitats and the extinction of one of them, for a threatened species like M. alcon alcon, is strongly prejudicial. Studying exchange possibilities between known Alcon Blue's stations in the "Landes de Lessay" (Lessay's Heathland) is falling within a better knowledge of the functioning of the existing populations and of action possibilities on the area with the objective to protect the species. The explorations realized allowed to produce a cartography of the vegetations which can be found outside of the Natura 2000's site "Havre de St-Germain-sur-Ay et Landes de Lessay" (St-Germain-sur-Ay's Haven and Lessay's Heathland"), and in which one are located most of Alcon Blue's populations. This knowledge supply allowed, in one hand, to know this environment, work which can used in numerous ways, and, in an other hand, in a more base point of view on the Alcon Blue species, to take an inventory of suitable and unsuitable habitats to be able to evaluate moving possibilities of the butterfly. An inventory of still existing heathland sites outside the Natura 2000, habitats where the majority of this species' populations can be found in Lower-Normandy, was realized in this way to know the potential of those sites for an eventual colonization or their utility as staging areas or corridors.
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Master Thesis
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https://dumas.ccsd.cnrs.fr/dumas-01135336
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Émilie Roinel. Azuré des Mouillères (Maculinea alcon alcon) et « Landes de Lessay » : milieux favorables et possibilités de déplacement hors-site Natura 2000. Sciences agricoles. 2014. ⟨dumas-01135336⟩

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