Assessing the ecological basis of conservation priority lists for bird species in an island scenario

摘要: Proneness to extinction varies naturally and continuously according the ecological phenomena that compound rarity even before anthropogenic effects may play a role. This is particularly obvious in islands, where populations are often (and naturally) small fragmented and, consequently, conservation priority lists have large number of species clustered unhelpfully higher threat categories. In this study we propose simple model based on natural descriptors taxonomic distinctiveness (area occupancy, population abundance trend, endemicity), assess its correlation with features (habitat preferences body size) check whether Spanish Red data Book normative list (the Canary Islands Catalogue Threatened Species administrative revision) includes these bases for birds. We found variation (48.2%) was explained by phylogeny, habitat breadth preference urban areas (with negative effect), agricultural environments (a positive effect). The tested poorly related ordering risk loss singularity, so some changes would make their categories more coherent. contend should be taken into account understand why populations/species at whereas others remain relatively safe, as provide firmer grounds which base priorities.