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Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Conservation status and favourable reference value for the bird species breeding in Italy /Stato di conservazione e valore di riferimento favorevole per le popolazioni di uccelli nidificanti in Italia (2016)
Auteurs :	Marco Gustin, Auteur ; Mattia Brambilla, Auteur ; Claudio Celada, Auteur
Type de document :	Article
Dans :	Rivista Italiana di Ornitologia (86(2) 2016/12/21)
Article en page(s) :	3-58
Langues:	Anglais ; Italien
Mots-clés :	Italie ; Oiseaux nicheurs ; Dynamique population
Mots-clés:	FRV (Valore di Riferimento Favorevole) ; PVA ; Popolazioni Italiane nidificanti ; Population modelling ; densità di popolazione ; stato di conservazione
Résumé :	EU guidelines for monitoring conservation status of species and habitat require that Member States of the EU provide an indication of the “Favourable Reference Value” (FRV). FRV represents a long term conservation objective, such as to identify a definitely favourable con dition for a species, ensuring long term persistence. Its use allows for a more thorough and transparent evaluation of the conservation status of a species. This work evaluated the conservation status of bird spe cies breeding in Italy, by developing a method based on EU Directives’ requirements and including FRV use. We developed a method for the definition of population, range and habitat FRVs, but until now only population FRVs have been calculated for species regularly breeding in Italy and currently not undergoing population increase after recent colonisation ( To evaluate the conservation status of the breeding species, the traffic light categories (red: poor, yellow: inadequate, green: favorable) proposed by Commission for Habitat Directive, were adopted and applied to all the three components considered (population, range and habitat), and an overall synthetic value was provided (favourable, inadequate, poor, unknown) according to the following scheme: favourable: green. All green or two green and one unkwnow; inadequate: yellow. One or more yellow but no red; poor: red. One or more red; unknown: white. Three unknown or two plus one green. Before the eventual evaluation of the conservation status for each component, it is essential to check whether there are factors potentially preventing reaching or maintaining FRV in a near future (warning lights). Overall, 42 species listed in the Annex I of the Birds Direc tive have bad conservation status, 39 inadequate, 6 favourable and 1 unknown. Among species not listed in the Annex I, 35 have bad con servation status, 44 inadequate, 67 favourable and 16 unknown. For some species, the conservation status was also evaluated at the biore gional level, and for each bioregion the traffic light evaluation was given. To be in a favourable conservation status, it is not enough that a species/population is out of extinction risk, as the species should fully play its key ecological functions in its environment. Thus, FRV provided should not be applied automatically and in an uncritical way. The strong pressures acting on many species and populations (climate change, environmental degradation, large scale changes in population dynamics) require an accurate evaluation of threats and pressures acting on species/populations now or in the next future, also for populations currently at or above the relative FRV. Furthermore, FRVs should be periodically reviewed and updated, with particular reference to the new data provided every six years by the reporting activity carried out within the framework of the Birds Directive. Key words: Italian breeding population, conservation status, FRV (Favourable Reference Status), PVA, Population modelling, population density
En ligne :	http://sisn.pagepress.org/index.php/rio/article/view/332

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