The Role of Photobionts as Drivers of Diversification in an Island Radiation of Lichen-Forming Fungi

Speciation in oceanic islands has attracted the interest of scientists since the 19th century. One of the most striking evolutionary phenomena that can be studied in islands is adaptive radiation, that is, when a lineage gives rise to different species by means of ecological speciation. Some of the...

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Autores: Blázquez, Miguel, Hernández-Moreno, Lucía S., Gasulla, Francisco, Pérez-Vargas, Israel, Pérez-Ortega, Sergio
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/281252
Acceso en línea:http://hdl.handle.net/10261/281252
Access Level:acceso abierto
Palabra clave:Macaronesia
Ramalina
trophic niche
metabarcoding
Adaptive radiation
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spelling The Role of Photobionts as Drivers of Diversification in an Island Radiation of Lichen-Forming FungiBlázquez, MiguelHernández-Moreno, Lucía S.Gasulla, FranciscoPérez-Vargas, IsraelPérez-Ortega, SergioMacaronesiaRamalinatrophic nichemetabarcodingAdaptive radiationSpeciation in oceanic islands has attracted the interest of scientists since the 19th century. One of the most striking evolutionary phenomena that can be studied in islands is adaptive radiation, that is, when a lineage gives rise to different species by means of ecological speciation. Some of the best-known examples of adaptive radiation are charismatic organisms like the Darwin finches of the Galapagos and the cichlid fishes of the great African lakes. In these and many other examples, a segregation of the trophic niche has been shown to be an important diversification driver. Radiations are known in other groups of organisms, such as lichen-forming fungi. However, very few studies have investigated their adaptive nature, and none have focused on the trophic niche. In this study, we explore the role of the trophic niche in a putative radiation of endemic species from the Macaronesian Region, the Ramalina decipiens group. The photobiont diversity was studied by Illumina MiSeq sequencing of the ITS2 region of 197 specimens spanning the phylogenetic breadth and geographic range of the group. A total of 66 amplicon sequence variants belonging to the four main clades of the algal genus Trebouxia were found. Approximately half of the examined thalli showed algal coexistence, but in most of them, a single main photobiont amounted to more than 90% of the reads. However, there were no significant differences in photobiont identity and in the abundance of ITS2 reads across the species of the group. We conclude that a segregation of the trophic niche has not occurred in the R. decipiens radiation.Frontiers MediaMinisterio de Ciencia e Innovación (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2022202220222022info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/281252reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO//RYC-2014-16784http://dx.doi.org/10.3389/fmicb.2021.784182Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2812522026-05-22T06:33:51Z
dc.title.none.fl_str_mv The Role of Photobionts as Drivers of Diversification in an Island Radiation of Lichen-Forming Fungi
title The Role of Photobionts as Drivers of Diversification in an Island Radiation of Lichen-Forming Fungi
spellingShingle The Role of Photobionts as Drivers of Diversification in an Island Radiation of Lichen-Forming Fungi
Blázquez, Miguel
Macaronesia
Ramalina
trophic niche
metabarcoding
Adaptive radiation
title_short The Role of Photobionts as Drivers of Diversification in an Island Radiation of Lichen-Forming Fungi
title_full The Role of Photobionts as Drivers of Diversification in an Island Radiation of Lichen-Forming Fungi
title_fullStr The Role of Photobionts as Drivers of Diversification in an Island Radiation of Lichen-Forming Fungi
title_full_unstemmed The Role of Photobionts as Drivers of Diversification in an Island Radiation of Lichen-Forming Fungi
title_sort The Role of Photobionts as Drivers of Diversification in an Island Radiation of Lichen-Forming Fungi
dc.creator.none.fl_str_mv Blázquez, Miguel
Hernández-Moreno, Lucía S.
Gasulla, Francisco
Pérez-Vargas, Israel
Pérez-Ortega, Sergio
author Blázquez, Miguel
author_facet Blázquez, Miguel
Hernández-Moreno, Lucía S.
Gasulla, Francisco
Pérez-Vargas, Israel
Pérez-Ortega, Sergio
author_role author
author2 Hernández-Moreno, Lucía S.
Gasulla, Francisco
Pérez-Vargas, Israel
Pérez-Ortega, Sergio
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Macaronesia
Ramalina
trophic niche
metabarcoding
Adaptive radiation
topic Macaronesia
Ramalina
trophic niche
metabarcoding
Adaptive radiation
description Speciation in oceanic islands has attracted the interest of scientists since the 19th century. One of the most striking evolutionary phenomena that can be studied in islands is adaptive radiation, that is, when a lineage gives rise to different species by means of ecological speciation. Some of the best-known examples of adaptive radiation are charismatic organisms like the Darwin finches of the Galapagos and the cichlid fishes of the great African lakes. In these and many other examples, a segregation of the trophic niche has been shown to be an important diversification driver. Radiations are known in other groups of organisms, such as lichen-forming fungi. However, very few studies have investigated their adaptive nature, and none have focused on the trophic niche. In this study, we explore the role of the trophic niche in a putative radiation of endemic species from the Macaronesian Region, the Ramalina decipiens group. The photobiont diversity was studied by Illumina MiSeq sequencing of the ITS2 region of 197 specimens spanning the phylogenetic breadth and geographic range of the group. A total of 66 amplicon sequence variants belonging to the four main clades of the algal genus Trebouxia were found. Approximately half of the examined thalli showed algal coexistence, but in most of them, a single main photobiont amounted to more than 90% of the reads. However, there were no significant differences in photobiont identity and in the abundance of ITS2 reads across the species of the group. We conclude that a segregation of the trophic niche has not occurred in the R. decipiens radiation.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022
2022
2022
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/10261/281252
url http://hdl.handle.net/10261/281252
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/MINECO//RYC-2014-16784
http://dx.doi.org/10.3389/fmicb.2021.784182
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Frontiers Media
publisher.none.fl_str_mv Frontiers Media
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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