Tracing the biogeographic history of the world's most isolated insular floras

Inferring general biogeographic patterns in the sub-Antarctic region has been challenging due to the disparate geological origins of its islands and archipelagos—ranging from Gondwanan fragments to uplifted seafloor and more recently formed volcanic islands—and the remoteness of these island systems...

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Autores: Aguado-Lara, Ángela, Sanmartín, Isabel, Le Roux, Johannes J., García-Verdugo, Carlos, Molino, Sonia, Convey, Peter, Jansen van Vuuren, Bettine, Mairal, Mario
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/395370
Acceso en línea:http://hdl.handle.net/10261/395370
https://api.elsevier.com/content/abstract/scopus_id/105000877592
Access Level:acceso abierto
Palabra clave:Austral biogeography
Island colonization
Long-distance dispersal
Phylogenetics
Sub-Antarctic islands
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network_name_str España
repository_id_str
dc.title.none.fl_str_mv Tracing the biogeographic history of the world's most isolated insular floras
title Tracing the biogeographic history of the world's most isolated insular floras
spellingShingle Tracing the biogeographic history of the world's most isolated insular floras
Aguado-Lara, Ángela
Austral biogeography
Island colonization
Long-distance dispersal
Phylogenetics
Sub-Antarctic islands
title_short Tracing the biogeographic history of the world's most isolated insular floras
title_full Tracing the biogeographic history of the world's most isolated insular floras
title_fullStr Tracing the biogeographic history of the world's most isolated insular floras
title_full_unstemmed Tracing the biogeographic history of the world's most isolated insular floras
title_sort Tracing the biogeographic history of the world's most isolated insular floras
dc.creator.none.fl_str_mv Aguado-Lara, Ángela
Sanmartín, Isabel
Le Roux, Johannes J.
García-Verdugo, Carlos
Molino, Sonia
Convey, Peter
Jansen van Vuuren, Bettine
Mairal, Mario
author Aguado-Lara, Ángela
author_facet Aguado-Lara, Ángela
Sanmartín, Isabel
Le Roux, Johannes J.
García-Verdugo, Carlos
Molino, Sonia
Convey, Peter
Jansen van Vuuren, Bettine
Mairal, Mario
author_role author
author2 Sanmartín, Isabel
Le Roux, Johannes J.
García-Verdugo, Carlos
Molino, Sonia
Convey, Peter
Jansen van Vuuren, Bettine
Mairal, Mario
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv South African National Antarctic Programme
National Research Foundation (South Africa)
Ministerio de Ciencia e Innovación (España)
Comunidad de Madrid
Natural Environment Research Council (UK)
Aguado-Lara, Ángela [0009-0007-4106-6021]
Sanmartín, Isabel [0000-0001-6104-9658]
Le Roux, Johannes J. [0000-0001-7911-9810]
García-Verdugo, Carlos [0000-0003-0332-5583]
Molino, Sonia [0000-0003-2396-4649]
Convey, Peter [0000-0001-8497-9903]
Jansen van Vuuren, Bettine [0000-0002-5334-5358]
Mairal, Mario [0000-0002-6588-5634]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Austral biogeography
Island colonization
Long-distance dispersal
Phylogenetics
Sub-Antarctic islands
topic Austral biogeography
Island colonization
Long-distance dispersal
Phylogenetics
Sub-Antarctic islands
description Inferring general biogeographic patterns in the sub-Antarctic region has been challenging due to the disparate geological origins of its islands and archipelagos—ranging from Gondwanan fragments to uplifted seafloor and more recently formed volcanic islands—and the remoteness of these island systems, spread around the austral continental landmasses. Here, we conduct phylogenetic reconstruction, divergence time estimation, and Bayesian Island Biogeographic analyses to reconstruct the spatio–temporal colonization histories of seven vascular plant lineages, which are either widespread across the sub-Antarctic region (Acaena magellanica, Austroblechnum penna-marina, Azorella selago, Notogrammitis crassior) or restricted to an extremely remote sub-Antarctic province (Colobanthus kerguelensis, Polystichum marionense, Pringlea antiscorbutica). Our results reveal high biological connectivity within the sub-Antarctic region, with southern landmasses (Australia, New Zealand, South America) as key sources of sub-Antarctic plant diversity since the Miocene, supporting long-distance dispersal as the primary colonization mechanism rather than tectonic vicariance. Despite the geographic isolation of the sub-Antarctic islands, eastward and westward colonization events have maintained this connectivity, likely facilitated by eastward-moving marine and wind currents, short-term weather systems, and/or dispersal by birds. Divergence time estimates indicate that most species diverged within the Plio–Pleistocene, with crown ages predating the Last Glacial Maximum, suggesting that sub-Antarctic archipelagos acted as refuges for biodiversity. Our findings highlight the role of one of the most remote sub-Antarctic archipelagos as both a refugium and a source of (re)colonization for continental regions. These results underscore the urgent need for establishing priority conservation plans in the sub-Antarctic, particularly in the face of climate change.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/395370
https://api.elsevier.com/content/abstract/scopus_id/105000877592
url http://hdl.handle.net/10261/395370
https://api.elsevier.com/content/abstract/scopus_id/105000877592
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement///PID2019‐108109GB‐I00
info:eu-repo/grantAgreement///PID2023‐153023NB‐I00
The underlying dataset has been published as supplementary material of the article in the publisher platform at DOI https://doi.org/10.1111/jse.13170
https://doi.org/10.1111/jse.13170
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv John Wiley & Sons
publisher.none.fl_str_mv John Wiley & Sons
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
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repository.name.fl_str_mv
repository.mail.fl_str_mv
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spelling Tracing the biogeographic history of the world's most isolated insular florasAguado-Lara, ÁngelaSanmartín, IsabelLe Roux, Johannes J.García-Verdugo, CarlosMolino, SoniaConvey, PeterJansen van Vuuren, BettineMairal, MarioAustral biogeographyIsland colonizationLong-distance dispersalPhylogeneticsSub-Antarctic islandsInferring general biogeographic patterns in the sub-Antarctic region has been challenging due to the disparate geological origins of its islands and archipelagos—ranging from Gondwanan fragments to uplifted seafloor and more recently formed volcanic islands—and the remoteness of these island systems, spread around the austral continental landmasses. Here, we conduct phylogenetic reconstruction, divergence time estimation, and Bayesian Island Biogeographic analyses to reconstruct the spatio–temporal colonization histories of seven vascular plant lineages, which are either widespread across the sub-Antarctic region (Acaena magellanica, Austroblechnum penna-marina, Azorella selago, Notogrammitis crassior) or restricted to an extremely remote sub-Antarctic province (Colobanthus kerguelensis, Polystichum marionense, Pringlea antiscorbutica). Our results reveal high biological connectivity within the sub-Antarctic region, with southern landmasses (Australia, New Zealand, South America) as key sources of sub-Antarctic plant diversity since the Miocene, supporting long-distance dispersal as the primary colonization mechanism rather than tectonic vicariance. Despite the geographic isolation of the sub-Antarctic islands, eastward and westward colonization events have maintained this connectivity, likely facilitated by eastward-moving marine and wind currents, short-term weather systems, and/or dispersal by birds. Divergence time estimates indicate that most species diverged within the Plio–Pleistocene, with crown ages predating the Last Glacial Maximum, suggesting that sub-Antarctic archipelagos acted as refuges for biodiversity. Our findings highlight the role of one of the most remote sub-Antarctic archipelagos as both a refugium and a source of (re)colonization for continental regions. These results underscore the urgent need for establishing priority conservation plans in the sub-Antarctic, particularly in the face of climate change.Financial and logistical support was provided by the South African National Research Foundation (NRF) and by the South African National Antarctic Programme (SANAP). MM was supported by the National Research Foundation (grant 89967). AA was supported by a contract from the programme YO INVESTIGO (13‐2022‐005867), autonomous government of Madrid (CAM), PRTR and NextGenerationEU, and the predoctoral grant (PIPF‐2022/ ECO‐24376) funded by CAM and supervised by IS. IS was supported by projects PID2019‐108109GB‐I00 funded by MCIN/ AEI/10.13039/501100011033; and PID2023‐153023NB‐I00 by MICIU/AEI/10.13039/501100011033 and FEDER/UE. PC is sup ported by NERC core funding to the British Antarctic Survey's “Biodiversity, Evolution and Adaptation” Team.Peer reviewedJohn Wiley & SonsSouth African National Antarctic ProgrammeNational Research Foundation (South Africa)Ministerio de Ciencia e Innovación (España)Comunidad de MadridNatural Environment Research Council (UK)Aguado-Lara, Ángela [0009-0007-4106-6021]Sanmartín, Isabel [0000-0001-6104-9658]Le Roux, Johannes J. [0000-0001-7911-9810]García-Verdugo, Carlos [0000-0003-0332-5583]Molino, Sonia [0000-0003-2396-4649]Convey, Peter [0000-0001-8497-9903]Jansen van Vuuren, Bettine [0000-0002-5334-5358]Mairal, Mario [0000-0002-6588-5634]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/395370https://api.elsevier.com/content/abstract/scopus_id/105000877592reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement///PID2019‐108109GB‐I00info:eu-repo/grantAgreement///PID2023‐153023NB‐I00The underlying dataset has been published as supplementary material of the article in the publisher platform at DOI https://doi.org/10.1111/jse.13170https://doi.org/10.1111/jse.13170Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3953702026-05-22T06:33:51Z
score 15,811543

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