The invasive Red-vented bulbul (Pycnonotus cafer) outcompetes native birds in a tropical biodiversity hotspot

Abstract : Squamata are one of the most threatened groups among island vertebrates, facing high pressure from exotic species. However, the contribution of small terrestrial reptiles in invasive rodents' diet remains poorly investigated, partly because of the lack of tools for accurately identifying chewed prey fragments in gut contents. The New Caledonia archipelago (South Pacific) hosts an exceptional terrestrial squamata fauna (105 species, 91.6% endemic) that are faced with many invasive species (rodents, feral cats, feral pigs, ants) and strong human pressures. Our study aimed to evaluate the frequency of occurrence of endemic skink remains by gut content analysis of two species of invasive rodents. Four rodent trapping sessions were implemented at two ultramafic sites and for two distinct habitats (closed canopy forest and open shrubland habitat). A total of 284 rats were trapped from two species (the ship rat Rattus rattus and the Pacific rat R. exulans) over 1200 trap nights. Combined analysis of stomach and caecum contents provided far more information than traditional stomach analysis alone. Analyses showed that 15.9% of rat samples included remains of at least 12 different skink species out of the 23 present. Six species are classified as threatened by the IUCN, the most endangered being Marmorosphax taom (CR) and Kanakysaurus viviparus (EN). This study provides new prospects for the assessment of invasive rodent impacts and new insights into the respective impacts of two sympatric invasive rodent species on native skinks.
Type de document :
Article dans une revue
PLoS ONE, Public Library of Science, 2018, 13 (2), 〈10.1371/journal.pone.0192249〉
Liste complète des métadonnées

Littérature citée [21 références]  Voir  Masquer  Télécharger
Contributeur : Catherine Beaussier <>
Soumis le : lundi 17 septembre 2018 - 11:53:32
Dernière modification le : mardi 5 mars 2019 - 01:25:53
Document(s) archivé(s) le : mardi 18 décembre 2018 - 12:16:01


Fichiers éditeurs autorisés sur une archive ouverte


Distributed under a Creative Commons Paternité 4.0 International License



Martin Thibault, Eric Vidal, Murray Alan Potter, Thierry Sanchez, Fabrice Brescia. The invasive Red-vented bulbul (Pycnonotus cafer) outcompetes native birds in a tropical biodiversity hotspot. PLoS ONE, Public Library of Science, 2018, 13 (2), 〈10.1371/journal.pone.0192249〉. 〈hal-01793845〉



Consultations de la notice


Téléchargements de fichiers