The invasive Red-vented bulbul (Pycnonotus cafer) outcompetes native birds in a tropical biodiversity hotspot
International audience 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 accura...
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Online Access: | https://hal.science/hal-01793845 https://hal.science/hal-01793845/document https://hal.science/hal-01793845/file/journal.pone.0192249.pdf https://doi.org/10.1371/journal.pone.0192249 |
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ftunivnantes:oai:HAL:hal-01793845v1 2023-05-15T18:05:06+02:00 The invasive Red-vented bulbul (Pycnonotus cafer) outcompetes native birds in a tropical biodiversity hotspot Thibault, Martin Vidal, Eric Potter, Murray Alan Sanchez, Thierry Brescia, Fabrice Université du Québec en Outaouais (UQO) Institut méditerranéen de biodiversité et d'écologie marine et continentale (IMBE) Avignon Université (AU)-Aix Marseille Université (AMU)-Institut de recherche pour le développement IRD : UMR237-Centre National de la Recherche Scientifique (CNRS) Institut Agronomique Néo-Calédonien (IAC) 2018-02-01 https://hal.science/hal-01793845 https://hal.science/hal-01793845/document https://hal.science/hal-01793845/file/journal.pone.0192249.pdf https://doi.org/10.1371/journal.pone.0192249 en eng HAL CCSD Public Library of Science info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0192249 hal-01793845 https://hal.science/hal-01793845 https://hal.science/hal-01793845/document https://hal.science/hal-01793845/file/journal.pone.0192249.pdf doi:10.1371/journal.pone.0192249 IRD: fdi:010072073 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1932-6203 EISSN: 1932-6203 PLoS ONE https://hal.science/hal-01793845 PLoS ONE, 2018, 13 (2), ⟨10.1371/journal.pone.0192249⟩ Rattus rattus endemic skinks Rattus exulans island conservation diet analysis [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2018 ftunivnantes https://doi.org/10.1371/journal.pone.0192249 2023-01-25T00:42:53Z International audience 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. Article in Journal/Newspaper Rattus rattus Université de Nantes: HAL-UNIV-NANTES Pacific PLOS ONE 13 2 e0192249 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Rattus rattus endemic skinks Rattus exulans island conservation diet analysis [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
Rattus rattus endemic skinks Rattus exulans island conservation diet analysis [SDE.BE]Environmental Sciences/Biodiversity and Ecology Thibault, Martin Vidal, Eric Potter, Murray Alan Sanchez, Thierry Brescia, Fabrice The invasive Red-vented bulbul (Pycnonotus cafer) outcompetes native birds in a tropical biodiversity hotspot |
topic_facet |
Rattus rattus endemic skinks Rattus exulans island conservation diet analysis [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
International audience 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. |
author2 |
Université du Québec en Outaouais (UQO) Institut méditerranéen de biodiversité et d'écologie marine et continentale (IMBE) Avignon Université (AU)-Aix Marseille Université (AMU)-Institut de recherche pour le développement IRD : UMR237-Centre National de la Recherche Scientifique (CNRS) Institut Agronomique Néo-Calédonien (IAC) |
format |
Article in Journal/Newspaper |
author |
Thibault, Martin Vidal, Eric Potter, Murray Alan Sanchez, Thierry Brescia, Fabrice |
author_facet |
Thibault, Martin Vidal, Eric Potter, Murray Alan Sanchez, Thierry Brescia, Fabrice |
author_sort |
Thibault, Martin |
title |
The invasive Red-vented bulbul (Pycnonotus cafer) outcompetes native birds in a tropical biodiversity hotspot |
title_short |
The invasive Red-vented bulbul (Pycnonotus cafer) outcompetes native birds in a tropical biodiversity hotspot |
title_full |
The invasive Red-vented bulbul (Pycnonotus cafer) outcompetes native birds in a tropical biodiversity hotspot |
title_fullStr |
The invasive Red-vented bulbul (Pycnonotus cafer) outcompetes native birds in a tropical biodiversity hotspot |
title_full_unstemmed |
The invasive Red-vented bulbul (Pycnonotus cafer) outcompetes native birds in a tropical biodiversity hotspot |
title_sort |
invasive red-vented bulbul (pycnonotus cafer) outcompetes native birds in a tropical biodiversity hotspot |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-01793845 https://hal.science/hal-01793845/document https://hal.science/hal-01793845/file/journal.pone.0192249.pdf https://doi.org/10.1371/journal.pone.0192249 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Rattus rattus |
genre_facet |
Rattus rattus |
op_source |
ISSN: 1932-6203 EISSN: 1932-6203 PLoS ONE https://hal.science/hal-01793845 PLoS ONE, 2018, 13 (2), ⟨10.1371/journal.pone.0192249⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0192249 hal-01793845 https://hal.science/hal-01793845 https://hal.science/hal-01793845/document https://hal.science/hal-01793845/file/journal.pone.0192249.pdf doi:10.1371/journal.pone.0192249 IRD: fdi:010072073 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1371/journal.pone.0192249 |
container_title |
PLOS ONE |
container_volume |
13 |
container_issue |
2 |
container_start_page |
e0192249 |
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1766176530475515904 |