La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Variation in productivity and territory occupancy in an Eagle Owl Bubo bubo population
Auteurs :	Mattia Brambilla, Auteur ; Radames Bionda, Auteur
Type de document :	Article
Dans :	Ornis Fennica (90(1) 2013)
Article en page(s) :	50-56
Langues:	Anglais
Résumé :	Source-sink dynamics refer to systems with some units as sources of juveniles, and others as sinks. The same pattern can theoretically occur at a small spatial scale, within single populations. Under these circumstances, varying quality of breeding habitats/territories determines different levels of survival and/or reproduction, which in turn result in varying contributions of territories to the population dynamics. Territory occupancy has been proposed as an indirect measure of habitat quality. Here, we used territory occupancy and productivity from a long-term monitoring of an Eagle Owl Bubo bubo population in NW Italy to (i) show how different contributions to population dynamics may characterize territories over limited geographical scale in a strongly territorial species, and (ii) investigate the potential use of territory occupancy as a proxy for habitat quality in this species. Three out of

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