Genetic, morphological, and acoustic evidence reveals lack of diversification in the colonization process in an island bird
Songbirds with recently (i.e., early Holocene) founded populations are suitable models for studying incipient differentiation in oceanic islands. On such systems each colonization event represents a different evolutionary episode that can be studied by addressing sets of diverging phenotypic and genetic traits. We investigate the process of early differentiation in the spectacled warbler (Sylvia conspicillata) in 14 populations separated by sea barriers from three Atlantic archipelagos and from continental regions spanning from tropical to temperate latitudes. Our approach involved the study of sexual acoustic signals, morphology, and genetic data. Mitochondrial DNA did not provide clear population structure. However, microsatellites analyses consistently identified two genetic groups, albeit without correspondence to subspecies classification and little correspondence to geography. Coalescent analyses showed significant evidence for gene flow between the two genetic groups. Discriminant analyses could not correctly assign morphological or acoustic traits to source populations. Therefore, although theory predicting that in isolated populations genetic, morphological, or acoustic traits can lead to radiation, we have strikingly failed to document differentiation on these attributes in a resident passerine throughout three oceanic archipelagos.
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Wiley-VCH
2014-08
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Subjects: | Macaronesia, Lack of diversification, Gene flow, Avian evolution, Oceanic islands, |
Online Access: | http://hdl.handle.net/10261/180008 http://dx.doi.org/10.13039/501100007757 http://dx.doi.org/10.13039/501100000780 |
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dig-ipna-es-10261-1800082020-12-09T17:43:48Z Genetic, morphological, and acoustic evidence reveals lack of diversification in the colonization process in an island bird Illera, Juan Carlos Palmero, Ana M. Laiolo, Paola Rodríguez, F. Moreno, Á. C. Navascués, Miguel European Commission Agencia Canaria de Investigación, Innovación y Sociedad de la Información Ministerio de Educación (España) Macaronesia Lack of diversification Gene flow Avian evolution Oceanic islands Songbirds with recently (i.e., early Holocene) founded populations are suitable models for studying incipient differentiation in oceanic islands. On such systems each colonization event represents a different evolutionary episode that can be studied by addressing sets of diverging phenotypic and genetic traits. We investigate the process of early differentiation in the spectacled warbler (Sylvia conspicillata) in 14 populations separated by sea barriers from three Atlantic archipelagos and from continental regions spanning from tropical to temperate latitudes. Our approach involved the study of sexual acoustic signals, morphology, and genetic data. Mitochondrial DNA did not provide clear population structure. However, microsatellites analyses consistently identified two genetic groups, albeit without correspondence to subspecies classification and little correspondence to geography. Coalescent analyses showed significant evidence for gene flow between the two genetic groups. Discriminant analyses could not correctly assign morphological or acoustic traits to source populations. Therefore, although theory predicting that in isolated populations genetic, morphological, or acoustic traits can lead to radiation, we have strikingly failed to document differentiation on these attributes in a resident passerine throughout three oceanic archipelagos. The Canary Agency for Research and Innovation (ACIISI) and the European Regional Development Fund (Ref.: SolSubC200801000201) provided financial support. The Regional Government of the Canary Islands, Andalusia, Asturias and Madrid in Spain, the Natural Park of Madeira in Portugal, and the Governments of Cape Verde and Morocco gave permission to conduct fieldwork in these countries. AMP was funded by a graduate scholarship from the Spanish Ministry of Education, and JCI was supported by a Spanish postdoctoral fellowship (subprogram Ramón y Cajal). JCI obtained funding for and set up the study Peer Reviewed 2019-04-12T08:54:55Z 2019-04-12T08:54:55Z 2014-08 2019-04-12T08:54:56Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1111/evo.12429 issn: 0014-3820 e-issn: 1558-5646 Evolution: international journal of organic evolution 68(8): 2259-2274 (2014) http://hdl.handle.net/10261/180008 10.1111/evo.12429 http://dx.doi.org/10.13039/501100007757 http://dx.doi.org/10.13039/501100000780 https://doi.org/10.1111/evo.12429 Sí none Wiley-VCH Society for the Study of Evolution |
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Macaronesia Lack of diversification Gene flow Avian evolution Oceanic islands Macaronesia Lack of diversification Gene flow Avian evolution Oceanic islands |
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Macaronesia Lack of diversification Gene flow Avian evolution Oceanic islands Macaronesia Lack of diversification Gene flow Avian evolution Oceanic islands Illera, Juan Carlos Palmero, Ana M. Laiolo, Paola Rodríguez, F. Moreno, Á. C. Navascués, Miguel Genetic, morphological, and acoustic evidence reveals lack of diversification in the colonization process in an island bird |
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Songbirds with recently (i.e., early Holocene) founded populations are suitable models for studying incipient differentiation in oceanic islands. On such systems each colonization event represents a different evolutionary episode that can be studied by addressing sets of diverging phenotypic and genetic traits. We investigate the process of early differentiation in the spectacled warbler (Sylvia conspicillata) in 14 populations separated by sea barriers from three Atlantic archipelagos and from continental regions spanning from tropical to temperate latitudes. Our approach involved the study of sexual acoustic signals, morphology, and genetic data. Mitochondrial DNA did not provide clear population structure. However, microsatellites analyses consistently identified two genetic groups, albeit without correspondence to subspecies classification and little correspondence to geography. Coalescent analyses showed significant evidence for gene flow between the two genetic groups. Discriminant analyses could not correctly assign morphological or acoustic traits to source populations. Therefore, although theory predicting that in isolated populations genetic, morphological, or acoustic traits can lead to radiation, we have strikingly failed to document differentiation on these attributes in a resident passerine throughout three oceanic archipelagos. |
author2 |
European Commission |
author_facet |
European Commission Illera, Juan Carlos Palmero, Ana M. Laiolo, Paola Rodríguez, F. Moreno, Á. C. Navascués, Miguel |
format |
artículo |
topic_facet |
Macaronesia Lack of diversification Gene flow Avian evolution Oceanic islands |
author |
Illera, Juan Carlos Palmero, Ana M. Laiolo, Paola Rodríguez, F. Moreno, Á. C. Navascués, Miguel |
author_sort |
Illera, Juan Carlos |
title |
Genetic, morphological, and acoustic evidence reveals lack of diversification in the colonization process in an island bird |
title_short |
Genetic, morphological, and acoustic evidence reveals lack of diversification in the colonization process in an island bird |
title_full |
Genetic, morphological, and acoustic evidence reveals lack of diversification in the colonization process in an island bird |
title_fullStr |
Genetic, morphological, and acoustic evidence reveals lack of diversification in the colonization process in an island bird |
title_full_unstemmed |
Genetic, morphological, and acoustic evidence reveals lack of diversification in the colonization process in an island bird |
title_sort |
genetic, morphological, and acoustic evidence reveals lack of diversification in the colonization process in an island bird |
publisher |
Wiley-VCH |
publishDate |
2014-08 |
url |
http://hdl.handle.net/10261/180008 http://dx.doi.org/10.13039/501100007757 http://dx.doi.org/10.13039/501100000780 |
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