Biome conservatism prevailed in repeated long-distance colonization of Madagascar's mountains by Helichrysum (Compositae, Gnaphalieae)

Colonization and diversification processes are responsible for the distinctiveness of island biotas, with Madagascar standing out as a biodiversity hotspot exceptionally rich in species and endemism. Regardless of its significance, the evolutionary history and diversification drivers of Madagascar¿s...

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Autores: Blanco-Gavaldà, C., Roquet, Cristina, Puig-Surroca, Genís, Andrés-Sánchez, Santiago, Razafimandimbison, Sylvain G., Letsara, Rokiman, Bergh, Nicola G., Cron, Glynis V., Moreyra, Lucía D., Calleja, Juan Antonio, Castillo, Òscar, Bayer, Randall J., Leliaert, Frederik, Susanna de la Serna, Alfonso, Galbany-Casals, Mercè
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:10261/376952
Acceso en línea:http://hdl.handle.net/10261/376952
Access Level:acceso abierto
Palabra clave:Afromontane flora
Asteraceae
Biogeography
Dispersal
Helichrysum
Madagascar
Target-enrichment
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oai_identifier_str oai:digital.csic.es:10261/376952
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network_name_str España
repository_id_str
dc.title.none.fl_str_mv Biome conservatism prevailed in repeated long-distance colonization of Madagascar's mountains by Helichrysum (Compositae, Gnaphalieae)
title Biome conservatism prevailed in repeated long-distance colonization of Madagascar's mountains by Helichrysum (Compositae, Gnaphalieae)
spellingShingle Biome conservatism prevailed in repeated long-distance colonization of Madagascar's mountains by Helichrysum (Compositae, Gnaphalieae)
Blanco-Gavaldà, C.
Afromontane flora
Asteraceae
Biogeography
Dispersal
Helichrysum
Madagascar
Target-enrichment
title_short Biome conservatism prevailed in repeated long-distance colonization of Madagascar's mountains by Helichrysum (Compositae, Gnaphalieae)
title_full Biome conservatism prevailed in repeated long-distance colonization of Madagascar's mountains by Helichrysum (Compositae, Gnaphalieae)
title_fullStr Biome conservatism prevailed in repeated long-distance colonization of Madagascar's mountains by Helichrysum (Compositae, Gnaphalieae)
title_full_unstemmed Biome conservatism prevailed in repeated long-distance colonization of Madagascar's mountains by Helichrysum (Compositae, Gnaphalieae)
title_sort Biome conservatism prevailed in repeated long-distance colonization of Madagascar's mountains by Helichrysum (Compositae, Gnaphalieae)
dc.creator.none.fl_str_mv Blanco-Gavaldà, C.
Roquet, Cristina
Puig-Surroca, Genís
Andrés-Sánchez, Santiago
Razafimandimbison, Sylvain G.
Letsara, Rokiman
Bergh, Nicola G.
Cron, Glynis V.
Moreyra, Lucía D.
Calleja, Juan Antonio
Castillo, Òscar
Bayer, Randall J.
Leliaert, Frederik
Susanna de la Serna, Alfonso
Galbany-Casals, Mercè
author Blanco-Gavaldà, C.
author_facet Blanco-Gavaldà, C.
Roquet, Cristina
Puig-Surroca, Genís
Andrés-Sánchez, Santiago
Razafimandimbison, Sylvain G.
Letsara, Rokiman
Bergh, Nicola G.
Cron, Glynis V.
Moreyra, Lucía D.
Calleja, Juan Antonio
Castillo, Òscar
Bayer, Randall J.
Leliaert, Frederik
Susanna de la Serna, Alfonso
Galbany-Casals, Mercè
author_role author
author2 Roquet, Cristina
Puig-Surroca, Genís
Andrés-Sánchez, Santiago
Razafimandimbison, Sylvain G.
Letsara, Rokiman
Bergh, Nicola G.
Cron, Glynis V.
Moreyra, Lucía D.
Calleja, Juan Antonio
Castillo, Òscar
Bayer, Randall J.
Leliaert, Frederik
Susanna de la Serna, Alfonso
Galbany-Casals, Mercè
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia, Innovación y Universidades (España)
Generalitat de Catalunya
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Afromontane flora
Asteraceae
Biogeography
Dispersal
Helichrysum
Madagascar
Target-enrichment
topic Afromontane flora
Asteraceae
Biogeography
Dispersal
Helichrysum
Madagascar
Target-enrichment
description Colonization and diversification processes are responsible for the distinctiveness of island biotas, with Madagascar standing out as a biodiversity hotspot exceptionally rich in species and endemism. Regardless of its significance, the evolutionary history and diversification drivers of Madagascar¿s flora remain understudied. Here we focus on Helichrysum (Compositae, Gnaphalieae) to investigate the evolutionary and biogeographic origins of the Malagasy flora. We inferred a highly resolved phylogeny based on target-enrichment data from 327 species (including 51 % of Malagasy endemics) and conducted ancestral range estimation analyses. Our results revealed at least six trans-oceanic dispersal events from different African regions to Madagascar during the Pliocene. In this process, biome conservatism prevailed, as evidenced by similarities between Malagasy lineages and their African relatives. The southern African grasslands, known to be the center of diversification and the main source of African Helichrysum lineages, played a key role in the colonization of Madagascar as the ancestral source area of at least three clades. The Tropical Afromontane region was revealed as the source of at least two montane Malagasy lineages that substantially radiated in-situ. Finally, a dispersal event from southwestern Africa led to a lineage represented by a single species adapted to the island¿s southwestern arid conditions. The main radiations of Helichrysum in Madagascar¿s mountains occurred within the last 2 My, coinciding with a transition towards cooler and drier conditions and the expansion of open habitats, likely driven by a combination of geographic and ecological speciation. Overall, our findings highlight the affinities between the montane floras of continental Africa and Madagascar.
publishDate 2025
dc.date.none.fl_str_mv 2025
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/10261/376952
url http://hdl.handle.net/10261/376952
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-105583GB-C22
http://dx.doi.org/10.1016/j.ympev.2024.108283
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier BV
publisher.none.fl_str_mv Elsevier BV
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
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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spelling Biome conservatism prevailed in repeated long-distance colonization of Madagascar's mountains by Helichrysum (Compositae, Gnaphalieae)Blanco-Gavaldà, C.Roquet, CristinaPuig-Surroca, GenísAndrés-Sánchez, SantiagoRazafimandimbison, Sylvain G.Letsara, RokimanBergh, Nicola G.Cron, Glynis V.Moreyra, Lucía D.Calleja, Juan AntonioCastillo, ÒscarBayer, Randall J.Leliaert, FrederikSusanna de la Serna, AlfonsoGalbany-Casals, MercèAfromontane floraAsteraceaeBiogeographyDispersalHelichrysumMadagascarTarget-enrichmentColonization and diversification processes are responsible for the distinctiveness of island biotas, with Madagascar standing out as a biodiversity hotspot exceptionally rich in species and endemism. Regardless of its significance, the evolutionary history and diversification drivers of Madagascar¿s flora remain understudied. Here we focus on Helichrysum (Compositae, Gnaphalieae) to investigate the evolutionary and biogeographic origins of the Malagasy flora. We inferred a highly resolved phylogeny based on target-enrichment data from 327 species (including 51 % of Malagasy endemics) and conducted ancestral range estimation analyses. Our results revealed at least six trans-oceanic dispersal events from different African regions to Madagascar during the Pliocene. In this process, biome conservatism prevailed, as evidenced by similarities between Malagasy lineages and their African relatives. The southern African grasslands, known to be the center of diversification and the main source of African Helichrysum lineages, played a key role in the colonization of Madagascar as the ancestral source area of at least three clades. The Tropical Afromontane region was revealed as the source of at least two montane Malagasy lineages that substantially radiated in-situ. Finally, a dispersal event from southwestern Africa led to a lineage represented by a single species adapted to the island¿s southwestern arid conditions. The main radiations of Helichrysum in Madagascar¿s mountains occurred within the last 2 My, coinciding with a transition towards cooler and drier conditions and the expansion of open habitats, likely driven by a combination of geographic and ecological speciation. Overall, our findings highlight the affinities between the montane floras of continental Africa and Madagascar.This work received financial support from the Spanish Ministry of Science, Innovation and Universities (PD2019-105583GB-C22/AEI/10.13039/501100011033) and the Catalan government (“Ajuts a grups consolidats” 2021SGR00315 and Ph.D. FI-AGAUR grant to C.B.-G. 2022FI_B00150).1. Introduction 2. Materials and methods 2.1. Taxon sampling 2.2. Next-generation sequencing 2.3. Molecular data processing 2.4. Phylogenetic analyses 2.5. Divergence time estimation 2.6. Ancestral geographic range reconstruction 3. Results 3.1. Molecular data processing 3.2. Phylogenetic analyses 3.3. Biogeographic reconstruction 4. Discussion 4.1. Helichrysum colonized Madagascar multiple times from Africa since the late Pliocene and likely returned once to the continent 4.2. Biome conservatism prevails in the colonization of Madagascar by Helichrysum: The continental Afromontane region reveals as the main source of Malagasy lineages 4.3. Diversification within Madagascar 5. Conclusions CRediT authorship contribution statement Funding Declaration of competing interest Acknowledgements Appendix A. Supplementary data Data availability ReferencesElsevier BVMinisterio de Ciencia, Innovación y Universidades (España)Generalitat de CatalunyaConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2025202520252025info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/376952reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-105583GB-C22http://dx.doi.org/10.1016/j.ympev.2024.108283Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3769522026-05-22T06:33:51Z
score 15,811543

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