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Contribution à la connaissance des communautés d'Hétérocères et de Coléoptères crépusculaires et nocturnes de l’île de Porquerolles (archipel des îles d'Hyères, département du Var) en lien avec les milieux

Abstract : On the initiative of Hyères-les-Palmiers municipality and Port-Cros National Park, a study on the night quality at Porquerolles was launched by the Association Nationale pour la Protection du Ciel et de l’Environnement Nocturnes (ANPCEN) in 2016. The aim of this study is to promote efficient lighting while limiting its impact on the environment. The present study is related to this project. Its objective is to improve the knowledge of Porquerolles’ crepuscular and nocturnal Heterocera and Coleoptera and to analyze the results in relation to the problem of light pollution. Three survey points (jardin Emmanuel Lopez, constructed wetland, fort Repentance) representative of different environments and different exposures to light pollution were studied during 4 sessions in 2016/2017. According to the ANPCEN study, the night quality is less good in the jardin Emmanuel Lopez compared to constructed wetland and the fort Repentance, the latter being the point with the best night quality. In total, 93 species of Coleoptera and 64 species of Heterocera were observed during our survey. On the one hand, for Heterocera, a specific richness gradient is observed from the most exposed point to light pollution to the least exposed, with 21 species for the jardin Emmanuel Lopez (point n°1), 35 for the lagooning basins (point n°2) and 57 for the fort Repentance (point n°3). On the other hand, for Coleoptera, point n°1 is as rich as point n°3 with 56 species each, whereas point n°2 yielded 38 species only. It will be interesting to carry out a new survey with the same protocol when the action proposals for the reduction of the pollution, as promoted by the ANPCEN, will be effective in order to identify a possible evolution of diversity and abundance in Heterocera and Coleoptera.
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Marion Fouchard, Jean-Pierre Hebrard, David Geoffroy, Philippe Ponel. Contribution à la connaissance des communautés d'Hétérocères et de Coléoptères crépusculaires et nocturnes de l’île de Porquerolles (archipel des îles d'Hyères, département du Var) en lien avec les milieux. Sci. Rep. Port-Cros natl. Park, 2019, 33, pp.127-162. ⟨hal-02391229⟩

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