La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Survival and population size of a resident bird species are declining as temperature increases
Auteurs :	Leonard Santisteban, Auteur ; Craig W. Benkman, Auteur ; Trevor Fetz, Auteur ; Julie W. Smith, Auteur
Type de document :	Article
Dans :	Journal of Animal Ecology (81(2) MAR 2012)
Article en page(s) :	352-363
Résumé :	1. A large number of migratory bird species appear to be declining as the result of climate change, but whether resident bird species have or will be adversely affected by climate change is less clear. We focus on the South Hills crossbill (Loxia curvirostra complex), which is endemic to about 70 km(2) of Rocky Mountain lodgepole pine (Pinus contorta latifolia) forest in southern Idaho, USA. 2. Our results indicate that the South Hills crossbill has declined by over 60% between 2003 and 2008, and that decreasing adult survival drives this population decline. 3. We evaluated the relative support for multiple hypotheses linking crossbill survival to climate, an ectoparasitic mite (scaly-leg mites Knemidokoptes jamaicensis), and the recent emergence of West Nile virus. Changes in adult apparent survival rate were closely associated with average spring and annual temperatures, and with high temperatures (>=

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