The loss of dispersal on islands hypothesis revisited: Implementing phylogeography to investigate evolution of dispersal traits in Periploca (Apocynaceae)

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dc.contributor.authorGarcía‐Verdugo, Carlos
dc.contributor.authorMairal Pisa, Mario José
dc.contributor.authorMonroy, Pedro
dc.contributor.authorSajeva, Maurizia
dc.contributor.authorCaujapé‐Castells, Juli
dc.date.accessioned2024-02-06T11:39:46Z
dc.date.available2024-02-06T11:39:46Z
dc.date.issued2017
dc.description.abstractThe loss of dispersal on islands hypothesis (LDIH posits that wind‐dispersed plants should exhibit reduced dispersal potential, particularly if island populations are old. In this study, we tested this hypothesis using a detailed phylogeographical framework across different geographical scales. Location Mainland and island areas of the Atlantic and Mediterranean regions, including Macaronesia (Canary Islands and Cape Verde) and Mediterranean islands in the strait of Sicily. Methods Forty‐five populations of Periploca laevigata, a wind‐dispersed shrub, were sampled. Plastid and nuclear microsatellite data were used to reconstruct spatio‐temporal patterns of island colonization, and estimates of seed terminal velocity used as a surrogate for dispersal ability under both field and common garden conditions. Results Our findings did not provide evidence of loss of dispersability in any island lineage. In all of the regions considered, dispersal ability was similar on island and mainland populations, or higher on islands. Contrary to expectations, lineages inferred as the oldest (western Canaries and Cape Verde) converged towards the most dispersive seed phenotype. This pattern was supported by data obtained under common garden conditions. Within the western Canarian lineage, successful dispersal was shown to be very rare among islands and extensive within islands, but dispersability did not vary significantly from older to more recent sublineages. Considering all the study islands, we found a strong, positive correlation between dispersal ability and estimates of within‐island habitat availability. Main conclusions This study suggests that dispersal ability can be favoured on islands, possibly because traits enhancing wind dispersal are positively selected when habitat availability is high. Our results challenge broad generalizations of the LDIH, but we discuss how overlooking species′ phylogeographical history may give rise to misleading conclusions.
dc.description.departmentDepto. de Biodiversidad, Ecología y Evolución
dc.description.facultyFac. de Ciencias Biológicas
dc.description.refereedTRUE
dc.description.statuspub
dc.identifier.citationGarcía‐Verdugo, C., et al. «The Loss of Dispersal on Islands Hypothesis Revisited: Implementing Phylogeography to Investigate Evolution of Dispersal Traits in Periploca (Apocynaceae)». Journal of Biogeography, vol. 44, n.o 11, noviembre de 2017, pp. 2595-606. DOI.org (Crossref), https://doi.org/10.1111/jbi.13050.
dc.identifier.doi10.1111/jbi.13050
dc.identifier.issn0305-0270
dc.identifier.issn1365-2699
dc.identifier.officialurlhttps://doi.org/10.1111/jbi.13050
dc.identifier.urihttps://hdl.handle.net/20.500.14352/99414
dc.journal.titleJournal of Biogeography
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.accessRightsrestricted access
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject.ucmBotánica (Biología)
dc.subject.unesco2417 Biología Vegetal (Botánica)
dc.titleThe loss of dispersal on islands hypothesis revisited: Implementing phylogeography to investigate evolution of dispersal traits in Periploca (Apocynaceae)
dc.typejournal article
dc.type.hasVersionVoR
dspace.entity.typePublication
relation.isAuthorOfPublication243505a8-3d58-411e-8bcf-a055541de0b4
relation.isAuthorOfPublication.latestForDiscovery243505a8-3d58-411e-8bcf-a055541de0b4
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