La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Rainfall and landscape features affect productivity in an alpine population of Eagle Owl Bubo bubo
Auteurs :	Radames Bionda, Auteur ; Mattia Brambilla, Auteur
Type de document :	Article
Dans :	Journal of Ornithology (153(1) JAN 2012)
Article en page(s) :	167-171
Langues:	Anglais
Résumé :	We investigated the effects of habitat structure and composition, rainfall and nest spacing on the productivity of an Eagle Owl Bubo bubo population in Piedmont, northern Italy, at 10 sites from 1996 to 2007. We modeled the effects of the above factors on the productivity of 85 breeding attempts through a mixed model procedure. The number of fledged young per pair was affected positively by wetland interspersion index (a potential estimate of prey abundance) and negatively by rainfall during chick-rearing and by cover of urbanized land in the nest surroundings. Our results demonstrated that productivity can be affected by a variety of factors of different kinds, which should be considered together in studies on habitat quality.

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