The Subantarctic Rayadito (Aphrastura subantarctica), a new bird species on the southernmost islands of the Americas.

Autor: Rozzi R; Cape Horn International Center (CHIC), Parque Etnobotánico Omora, Universidad de Magallanes, Puerto Williams, Chile. ricardo.rozzi@unt.edu.; Sub-Antarctic Biocultural Conservation Program, Department of Philosophy and Religion and Department of Biological Sciences, University of North Texas, Denton, TX, USA. ricardo.rozzi@unt.edu., Quilodrán CS; Cape Horn International Center (CHIC), Parque Etnobotánico Omora, Universidad de Magallanes, Puerto Williams, Chile. claudio.quilodran@unifr.ch.; Department of Biology, University of Fribourg, Fribourg, Switzerland. claudio.quilodran@unifr.ch., Botero-Delgadillo E; Department of Behavioural Ecology and Evolutionary Genetics, Max Plank Institute for Ornithology, Seewiesen, Germany.; Departamento de Ciencias Ecologicas, Facultad de Ciencias, Universidad de Chile, Santiago, Chile., Napolitano C; Cape Horn International Center (CHIC), Parque Etnobotánico Omora, Universidad de Magallanes, Puerto Williams, Chile.; Departamento de Ciencias Biológicas y Biodiversidad, Universidad de Los Lagos, Osorno, Chile.; Instituto de Ecología y Biodiversidad, Santiago, Chile., Torres-Mura JC; Cape Horn International Center (CHIC), Parque Etnobotánico Omora, Universidad de Magallanes, Puerto Williams, Chile.; AvesChile (Unión de Ornitólogos de Chile), Santiago, Chile., Barroso O; Cape Horn International Center (CHIC), Parque Etnobotánico Omora, Universidad de Magallanes, Puerto Williams, Chile., Crego RD; Smithsonian National Zoo and Conservation Biology Institute, Conservation Ecology Center, 1500 Remount Rd, Front Royal, VA, 22630, USA., Bravo C; Departamento de Ciencias Ecologicas, Facultad de Ciencias, Universidad de Chile, Santiago, Chile., Ippi S; Departamento de Zoología, CRUB Universidad Nacional del Comahue-CONICET, Bariloche, Argentina., Quirici V; Centro de Investigación Para la Sustentabilidad, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile., Mackenzie R; Cape Horn International Center (CHIC), Parque Etnobotánico Omora, Universidad de Magallanes, Puerto Williams, Chile., Suazo CG; Cape Horn International Center (CHIC), Parque Etnobotánico Omora, Universidad de Magallanes, Puerto Williams, Chile.; Department of Animal Ecology and Systematics, Justus Liebig University Giessen, Giessen, Germany., Rivero-de-Aguilar J; Cape Horn International Center (CHIC), Parque Etnobotánico Omora, Universidad de Magallanes, Puerto Williams, Chile., Goffinet B; Cape Horn International Center (CHIC), Parque Etnobotánico Omora, Universidad de Magallanes, Puerto Williams, Chile.; Department of Ecology and Evolutionary Biology, University of Connecticut, Storrs, CT, 06269, USA., Kempenaers B; Department of Behavioural Ecology and Evolutionary Genetics, Max Plank Institute for Ornithology, Seewiesen, Germany., Poulin E; Cape Horn International Center (CHIC), Parque Etnobotánico Omora, Universidad de Magallanes, Puerto Williams, Chile.; Departamento de Ciencias Ecologicas, Facultad de Ciencias, Universidad de Chile, Santiago, Chile.; Millennium Institute Biodiversity of Antarctic and Subantarctic Ecosystems (BASE), Facultad de Ciencias, Universidad de Chile, Santiago, Chile., Vásquez RA; Cape Horn International Center (CHIC), Parque Etnobotánico Omora, Universidad de Magallanes, Puerto Williams, Chile.; Departamento de Ciencias Ecologicas, Facultad de Ciencias, Universidad de Chile, Santiago, Chile.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2022 Aug 26; Vol. 12 (1), pp. 13957. Date of Electronic Publication: 2022 Aug 26.
DOI: 10.1038/s41598-022-17985-4
Abstrakt: We describe a new taxon of terrestrial bird of the genus Aphrastura (rayaditos) inhabiting the Diego Ramírez Archipelago, the southernmost point of the American continent. This archipelago is geographically isolated and lacks terrestrial mammalian predators as well as woody plants, providing a contrasted habitat to the forests inhabited by the other two Aphrastura spp. Individuals of Diego Ramírez differ morphologically from Aphrastura spinicauda, the taxonomic group they were originally attributed to, by their larger beaks, longer tarsi, shorter tails, and larger body mass. These birds move at shorter distances from ground level, and instead of nesting in cavities in trees, they breed in cavities in the ground, reflecting different life-histories. Both taxa are genetically differentiated based on mitochondrial and autosomal markers, with no evidence of current gene flow. Although further research is required to define how far divergence has proceeded along the speciation continuum, we propose A. subantarctica as a new taxonomic unit, given its unique morphological, genetic, and behavioral attributes in a non-forested habitat. The discovery of this endemic passerine highlights the need to monitor and conserve this still-pristine archipelago devoid of exotic species, which is now protected by the recently created Diego Ramírez Islands-Drake Passage Marine Park.
(© 2022. The Author(s).)
Databáze: MEDLINE
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