Linking seascape with landscape genetics: Oceanic currents favour colonization across the Galápagos Islands by a coastal plant

[Aim]: Coastal plants are terrestrial organisms for which ocean surface currents often act as long‐distance dispersal vectors (thalassochorous species) favouring broad distributions and connecting distant populations. However, few studies have statistically assessed the role of currents in modulatin...

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Autores: Arjona, Yurena, Fernández-López, Javier, Navascués, Miguel, Álvarez, Nadir, Nogales, Manuel, Vargas, Pablo
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/220575
Acceso en línea:http://hdl.handle.net/10261/220575
Access Level:acceso abierto
Palabra clave:Directional dispersal
Isolation by resistance
Oceanic islands
Population genetics
Salt bush
Thalassochory
id ES_85510e4db11cd9ab0bc3c2fbfc974ea8
oai_identifier_str oai:digital.csic.es:10261/220575
network_acronym_str ES
network_name_str España
repository_id_str
dc.title.none.fl_str_mv Linking seascape with landscape genetics: Oceanic currents favour colonization across the Galápagos Islands by a coastal plant
title Linking seascape with landscape genetics: Oceanic currents favour colonization across the Galápagos Islands by a coastal plant
spellingShingle Linking seascape with landscape genetics: Oceanic currents favour colonization across the Galápagos Islands by a coastal plant
Arjona, Yurena
Directional dispersal
Isolation by resistance
Oceanic islands
Population genetics
Salt bush
Thalassochory
title_short Linking seascape with landscape genetics: Oceanic currents favour colonization across the Galápagos Islands by a coastal plant
title_full Linking seascape with landscape genetics: Oceanic currents favour colonization across the Galápagos Islands by a coastal plant
title_fullStr Linking seascape with landscape genetics: Oceanic currents favour colonization across the Galápagos Islands by a coastal plant
title_full_unstemmed Linking seascape with landscape genetics: Oceanic currents favour colonization across the Galápagos Islands by a coastal plant
title_sort Linking seascape with landscape genetics: Oceanic currents favour colonization across the Galápagos Islands by a coastal plant
dc.creator.none.fl_str_mv Arjona, Yurena
Fernández-López, Javier
Navascués, Miguel
Álvarez, Nadir
Nogales, Manuel
Vargas, Pablo
author Arjona, Yurena
author_facet Arjona, Yurena
Fernández-López, Javier
Navascués, Miguel
Álvarez, Nadir
Nogales, Manuel
Vargas, Pablo
author_role author
author2 Fernández-López, Javier
Navascués, Miguel
Álvarez, Nadir
Nogales, Manuel
Vargas, Pablo
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Directional dispersal
Isolation by resistance
Oceanic islands
Population genetics
Salt bush
Thalassochory
topic Directional dispersal
Isolation by resistance
Oceanic islands
Population genetics
Salt bush
Thalassochory
description [Aim]: Coastal plants are terrestrial organisms for which ocean surface currents often act as long‐distance dispersal vectors (thalassochorous species) favouring broad distributions and connecting distant populations. However, few studies have statistically assessed the role of currents in modulating gene flow and species distributions of terrestrial organisms. Here we evaluate the hypothesis that some thalassochorous plants exhibit population connectivity, presumably due to effective seed dispersal driven by sea currents. Location Galápagos Islands (Ecuador). Taxon Salt bush (Cryptocarpus pyriformis Kunth), a Galápagos native and locally widespread coastal angiosperm. Methods Using 1806 SNPs obtained by ddRADseq, we evaluated the genetic structure and differentiation of the Galápagos salt bush. To assess the role of sea currents in modulating inter‐population gene flow, four explicit hypotheses were tested using reciprocal causal modelling and spatial eigenvector analysis: (a) isolation by sea resistance, considering that only sea dispersal is possible; (b) isolation by sea and inland resistance, considering that inland dispersal is also possible; (c) isolation by barrier, considering the sea as an obstacle to seed dispersal; and (d) isolation by geographical distance. Results Low differentiation and little genetic structure were detected among populations of C. pyriformis. Pairwise genetic distances between populations from different islands were significantly correlated with cost distances calculated from sea‐current direction and speed. Nonetheless, inland dispersal also accounted for some gene flow within each island. Main conclusion Extensive and frequent seed dispersal by sea has apparently favoured strong inter‐island genetic connectivity within Galápagos. A combination of methods developed for terrestrial and marine domains (landscape and seascape genetics) aids in understanding how landscape features modulate gene flow of coastal plant species, as these terrestrial organisms are highly dependent on the sea for seed dispersal.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020
2020
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/10261/220575
url http://hdl.handle.net/10261/220575
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/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2012‐C02‐01
https://doi.org/10.1111/jbi.13967
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Wiley-VCH
publisher.none.fl_str_mv Wiley-VCH
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 Linking seascape with landscape genetics: Oceanic currents favour colonization across the Galápagos Islands by a coastal plantArjona, YurenaFernández-López, JavierNavascués, MiguelÁlvarez, NadirNogales, ManuelVargas, PabloDirectional dispersalIsolation by resistanceOceanic islandsPopulation geneticsSalt bushThalassochory[Aim]: Coastal plants are terrestrial organisms for which ocean surface currents often act as long‐distance dispersal vectors (thalassochorous species) favouring broad distributions and connecting distant populations. However, few studies have statistically assessed the role of currents in modulating gene flow and species distributions of terrestrial organisms. Here we evaluate the hypothesis that some thalassochorous plants exhibit population connectivity, presumably due to effective seed dispersal driven by sea currents. Location Galápagos Islands (Ecuador). Taxon Salt bush (Cryptocarpus pyriformis Kunth), a Galápagos native and locally widespread coastal angiosperm. Methods Using 1806 SNPs obtained by ddRADseq, we evaluated the genetic structure and differentiation of the Galápagos salt bush. To assess the role of sea currents in modulating inter‐population gene flow, four explicit hypotheses were tested using reciprocal causal modelling and spatial eigenvector analysis: (a) isolation by sea resistance, considering that only sea dispersal is possible; (b) isolation by sea and inland resistance, considering that inland dispersal is also possible; (c) isolation by barrier, considering the sea as an obstacle to seed dispersal; and (d) isolation by geographical distance. Results Low differentiation and little genetic structure were detected among populations of C. pyriformis. Pairwise genetic distances between populations from different islands were significantly correlated with cost distances calculated from sea‐current direction and speed. Nonetheless, inland dispersal also accounted for some gene flow within each island. Main conclusion Extensive and frequent seed dispersal by sea has apparently favoured strong inter‐island genetic connectivity within Galápagos. A combination of methods developed for terrestrial and marine domains (landscape and seascape genetics) aids in understanding how landscape features modulate gene flow of coastal plant species, as these terrestrial organisms are highly dependent on the sea for seed dispersal.[Location]: Galápagos Islands (Ecuador).[Taxon]: Salt bush (Cryptocarpus pyriformis Kunth), a Galápagos native and locally widespread coastal angiosperm.[Methods]: Using 1806 SNPs obtained by ddRADseq, we evaluated the genetic structure and differentiation of the Galápagos salt bush. To assess the role of sea currents in modulating inter‐population gene flow, four explicit hypotheses were tested using reciprocal causal modelling and spatial eigenvector analysis: (a) isolation by sea resistance, considering that only sea dispersal is possible; (b) isolation by sea and inland resistance, considering that inland dispersal is also possible; (c) isolation by barrier, considering the sea as an obstacle to seed dispersal; and (d) isolation by geographical distance.[Results]: Low differentiation and little genetic structure were detected among populations of C. pyriformis. Pairwise genetic distances between populations from different islands were significantly correlated with cost distances calculated from sea‐current direction and speed. Nonetheless, inland dispersal also accounted for some gene flow within each island. Main conclusion Extensive and frequent seed dispersal by sea has apparently favoured strong inter‐island genetic connectivity within Galápagos. A combination of methods developed for terrestrial and marine domains (landscape and seascape genetics) aids in understanding how landscape features modulate gene flow of coastal plant species, as these terrestrial organisms are highly dependent on the sea for seed dispersal.This study is framed within a project also financed by the Ministerio de Economía y Competitividad (CGL2012‐C02‐01).Peer reviewedWiley-VCHMinisterio de Economía y Competitividad (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202020202020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/220575reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2012‐C02‐01https://doi.org/10.1111/jbi.13967Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2205752026-05-22T06:33:51Z
score 15,811543

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