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Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Response of steppe birds to various levels of farming intensity and of modification of the agricultural landscape: a comparative analysis of their effects on population density and habitat selection in the Little and Great Bustards (Tetrax tetrax and Otis tarda)
Titre original:	Response of steppe birds to various levels of farming intensity and of modification of the agricultural landscape
Auteurs :	Manuel B. Morales, Auteur ; Francisco Suarez, Auteur ; Eladio L. Garcia de la Morena, Auteur ; Faculté des Sciences (Édifice de Biologie) Université Autonome de Madrid, Auteur
Type de document :	Article
Dans :	La Terre et la Vie (61(3) 2006)
Article en page(s) :	261-270
Langues:	Anglais
Mots-clés:	Agriculture ; Agriculture intensive ; Animal conservation ; Aves ; Choix habitat ; Comparaison interspécifique ; Densité population ; Environmental factor ; Facteur milieu ; Iberian Peninsula ; Intensification ; Intensive farming ; Interspecific comparison ; Modification ; Otis tarda ; Paysage rural ; Population Density ; Protection faune ; Péninsule Ibérique ; Rural landscape ; Tetrax tetrax ; habitat ; habitat selection
Résumé :	We review the main studies on habitat selection at the scale of agrarian substrate by two non-passerine birds typical of Iberian and Mediterranean cereal farmland, the Little Bustard Tetrax tetrax and the Great Bustard Otis tarda. For each species and at each study site, we analyse the influence of landscape composition and degree of agrarian intensification on population density and pattern of agrarian substrate selection. Neither landscape composition nor intensification level showed any significant effect on population density, although landscape diversity was positively co-related with little bustard population density. The pattern of agrarian substrate selection was unaffected by landscape composition or agrarian intensification in either species, while the type of substrate itself was the only variable affecting such pattern in both of them. We discuss the implications of these results for the conservation of both species Sujet: Paysage rural; Otis tarda; Tetrax tetrax; Intensification; Comparaison interspécifique; Protection faune; Péninsule Ibérique; Agriculture intensive; Choix habitat; Modification; Agriculture; Habitat; Densité population; Facteur milieu; Aves; Rural landscape; Intensification; Interspecific comparison; Animal conservation; Iberian Peninsula; Intensive farming; Habitat selection; Modification; Agriculture; Habitat; Population density; Environmental factor; Aves
En ligne :	http://hdl.handle.net/2042/55684

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