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dc.contributor.authorLeiva, Carlos
dc.contributor.authorTaboada, Sergi
dc.contributor.authorKenny, Nathan J.
dc.contributor.authorCombosch, David
dc.contributor.authorGiribet, Gonzalo
dc.contributor.authorJombart, Thibaut
dc.contributor.authorRiesgo, Ana
dc.date.accessioned2019-08-08T13:28:00Z
dc.date.available2019-08-08T13:28:00Z
dc.date.issued2019-05-24
dc.date.submitted2019-08-08
dc.identifier.citationLeiva, C, Taboada, S, Kenny, NJ, et al. Population substructure and signals of divergent adaptive selection despite admixture in the sponge Dendrilla antarctica from shallow waters surrounding the Antarctic Peninsula. Mol Ecol. 2019; 28: 3151– 3170. https://doi.org/10.1111/mec.15135en_US
dc.identifier.doi10.1111/mec.15135
dc.identifier.urihttp://hdl.handle.net/10141/622553
dc.description.abstractAntarctic shallow‐water invertebrates are exceptional candidates to study population genetics and evolution, because of their peculiar evolutionary history and adaptation to extreme habitats that expand and retreat with the ice sheets. Among them, sponges are one of the major components, yet population connectivity of none of their many Antarctic species has been studied. To investigate gene flow, local adaptation and resilience to near‐future changes caused by global warming, we sequenced 62 individuals of the sponge Dendrilla antarctica along the Western Antarctic Peninsula (WAP) and the South Shetlands (spanning ~900 km). We obtained information from 577 double digest restriction site‐associated DNA sequencing (ddRADseq)‐derived single nucleotide polymorphism (SNP), using RADseq techniques for the first time with shallow‐water sponges. In contrast to other studies in sponges, our 389 neutral SNPs data set showed high levels of gene flow, with a subtle substructure driven by the circulation system of the studied area. However, the 140 outlier SNPs under positive selection showed signals of population differentiation, separating the central–southern WAP from the Bransfield Strait area, indicating a divergent selection process in the study area despite panmixia. Fourteen of these outliers were annotated, being mostly involved in immune and stress responses. We suggest that the main selective pressure on D. antarctica might be the difference in the planktonic communities present in the central–southern WAP compared to the Bransfield Strait area, ultimately depending on sea‐ice control of phytoplankton blooms. Our study unveils an unexpectedly long‐distance larval dispersal exceptional in Porifera, broadening the use of genome‐wide markers within nonmodel Antarctic organisms.en_US
dc.language.isoenen_US
dc.publisherWileyen_US
dc.rightsclosedAccessen_US
dc.titlePopulation substructure and signals of divergent adaptive selection despite admixture in the sponge Dendrilla antarctica from shallow waters surrounding the Antarctic Peninsulaen_US
dc.typeJournal Articleen_US
dc.identifier.eissn1365-294X
dc.identifier.journalMolecular Ecologyen_US
dc.identifier.volume28en_US
dc.identifier.startpage3151en_US
dc.description.nhm© 2019 John Wiley & Sons Ltd. This is the pre-peer reviewed version of the following article: Leiva, C, Taboada, S, Kenny, NJ, et al. Population substructure and signals of divergent adaptive selection despite admixture in the sponge Dendrilla antarctica from shallow waters surrounding the Antarctic Peninsula. Mol Ecol. 2019; 28: 3151– 3170. https://doi.org/10.1111/mec.15135, which has been published in final form at https://doi.org/10.1111/mec.15135. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.en_US
dc.subject.nhmadaptationen_US
dc.subject.nhmddRADseqen_US
dc.subject.nhmmitochondrial genomeen_US
dc.subject.nhmRNA‐seqen_US
dc.subject.nhmSNPsen_US
dc.subject.nhmSouth Shetland Islandsen_US
refterms.dateFOA2019-08-08T13:28:00Z


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