Guillaume Berdin
Animateur Nature - Environnement
35 ans
Permis de conduire
Angers (49000) France
Situation professionnelle
Freelance
Ouvert aux opportunités
Présentation
Après une Licence de biologie générale, puis une Licence 3 en Biologie des Organismes et des Populations, je me suis spécialisé, grâce à un Master en Écologie et Éco-ingénierie, dans l'étude des Zones Humides continentales et littorales.
Divers stages et expériences m'ont également permis d'affirmer mes compétences dans ce domaine et dans celui du SIG.
Motivé et déterminé, je souhaite aider au maintien et la sauvegarde des milieux naturels et de leur biodiversité.
Divers stages et expériences m'ont également permis d'affirmer mes compétences dans ce domaine et dans celui du SIG.
Motivé et déterminé, je souhaite aider au maintien et la sauvegarde des milieux naturels et de leur biodiversité.
Fourcade Y, Besnard AG, Beslot E, Hennique S, Mourgaud G, Berdin G, Secondi J (2018) Habitat selection in a dynamic seasonal environment: Vegetation composition drives the choice of the breeding habitat for the community of passerines in floodplain grasslands. Biological Conservation, 228, 301-309. doi:10.1016/j.biocon.2018.11.007
The conservation of grasslands is a concern worldwide as they are threatened by climate change and the expansion
of intensive agricultural practices. The management of these areas must take into account the decisional
process of habitat selection by individual organisms to identify potential ecological traps or underused habitats.
Organisms that live in heterogeneous environments must select their breeding habitat based on cues that reflect
habitat quality. In dynamic ecosystems such as grasslands, environmental cues used by individuals should show
a strong temporal autocorrelation, such that their characteristics during breeding can be predicted earlier in the
season. Our objective was to test if habitat features that explain grassland birds' distribution during the nesting
and chick-rearing period could be predicted from the habitat features available on territory settlement. In
western France, we analysed the relationships between the occurrence, richness and abundance of four passerine
species, and vegetation structure and composition during chick-rearing period. We then analysed the temporal
autocorrelation of vegetation features to determine whether the cues used during the settlement period reliably
predicted the vegetation features encountered at later stages of breeding. We found that birds selected habitats
characterized by a low cover of grasses, but did not respond to the physical structure of vegetation. The composition
of vegetation was also the only variable that exhibited temporal autocorrelation over the course of the
season, suggesting that individuals may rely on this feature to select optimal breeding habitats. Our results
suggest that in dynamic environments, and in the absence of breeding experience or public information, animals
can choose their breeding habitat based on a simple assessment of vegetation composition. A detailed knowledge
of the underlying drivers of habitat selection is essential to manage habitats, identify potential ecological traps,
and enhance the attractiveness of areas especially those under agri-environmental schemes.
The conservation of grasslands is a concern worldwide as they are threatened by climate change and the expansion
of intensive agricultural practices. The management of these areas must take into account the decisional
process of habitat selection by individual organisms to identify potential ecological traps or underused habitats.
Organisms that live in heterogeneous environments must select their breeding habitat based on cues that reflect
habitat quality. In dynamic ecosystems such as grasslands, environmental cues used by individuals should show
a strong temporal autocorrelation, such that their characteristics during breeding can be predicted earlier in the
season. Our objective was to test if habitat features that explain grassland birds' distribution during the nesting
and chick-rearing period could be predicted from the habitat features available on territory settlement. In
western France, we analysed the relationships between the occurrence, richness and abundance of four passerine
species, and vegetation structure and composition during chick-rearing period. We then analysed the temporal
autocorrelation of vegetation features to determine whether the cues used during the settlement period reliably
predicted the vegetation features encountered at later stages of breeding. We found that birds selected habitats
characterized by a low cover of grasses, but did not respond to the physical structure of vegetation. The composition
of vegetation was also the only variable that exhibited temporal autocorrelation over the course of the
season, suggesting that individuals may rely on this feature to select optimal breeding habitats. Our results
suggest that in dynamic environments, and in the absence of breeding experience or public information, animals
can choose their breeding habitat based on a simple assessment of vegetation composition. A detailed knowledge
of the underlying drivers of habitat selection is essential to manage habitats, identify potential ecological traps,
and enhance the attractiveness of areas especially those under agri-environmental schemes.