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Article Dans Une Revue Landscape Ecology Année : 2016

Butterfly assemblages in residential gardens are driven by species’ habitat preference and mobility

La préférence d'habitat et la capacité de dispersion des espèces structurent les assemblages de papillons dans les jardins résidentiels

Résumé

Context Understanding the factors contributing to maintaining biodiversity is crucial to mitigate the impact of anthropogenic disturbances. Representing large proportions of green area in highly modified landscapes, residential gardens are often seen as local habitats that can contribute to larger networks of suitable environments at the landscape scale. Objectives We investigated the impact of the landscape context on butterfly communities observed in residential gardens, taking into account garden characteristics, land-use types and presence of linear features in the surrounding landscape. We examined how species traits affected butterflies’ response to landscape context and habitat quality. Methods We performed a cross-scale study, based on citizen science data documenting butterfly species composition and abundance in 920 gardens across France. We examined the effect of garden quality, the area of different land-use types and the length of linear elements measured at three scales within the surrounding landscape. Species were grouped according to their habitat preference and mobility. Results Urbanization negatively affected total species richness and the abundance of butterfly in each group. This was related to declining habitat quality and reduced area of suitable habitat in the surrounding landscape. The magnitude of this effect, however, was negatively correlated with mobility, a trait related to habitat preference. The spatial scale at which landscape context best explained variation in butterfly abundance changed with species’ habitat preference. Conclusions This study highlights the importance of preserving high quality habitats in altered landscapes and considering species’ mobility and habitat preference when assessing the impact of landscapes on butterfly communities.
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Dates et versions

hal-02604797 , version 1 (16-05-2020)

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T. Olivier, R. Schmucki, B. Fontaine, Anne Villemey, Frédéric Archaux. Butterfly assemblages in residential gardens are driven by species’ habitat preference and mobility. Landscape Ecology, 2016, 31 (4), pp.865-876. ⟨10.1007/s10980-015-0299-9⟩. ⟨hal-02604797⟩
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