La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Galapagos Rail Laterallus spilonotus population change associated with habitat invasion by the Red-barked Quinine Tree Cinchona pubescens
Auteurs :	W. Gregory Shriver, Auteur ; James P. Gibbs, Auteur ; Hara W. Woltz, Auteur ; Nicole P. Schwarz, Auteur ; Margaret A. Pepper, Auteur
Type de document :	Article
Dans :	Bird Conservation International (21(2) JUN 2011)
Article en page(s) :	221-227
Langues:	Anglais
Résumé :	Species on oceanic islands are more likely to be endemic as well as more extinction-prone than those on continents. The Galapagos Rail Laterallus spilonotus, endemic to the Galapagos Archipelago, is presently known to occur on just four of its seven previously occupied islands and is facing multiple threats to its persistence. In this study, we compared the rail's occurrence and abundance at 193 survey points between 2000 and 2007 on Santa Cruz Island and examined the influence of an invasion of the habitat of the species by the exotic Red-barked Quinine Tree Cinchona pubescens. We detected a 13% reduction in rail occurrence and a 31% reduction in abundance between 2000 and 2007. Rail abundance declined more in low elevation areas (

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