Multi-model seascape genomics identifies distinct environmental drivers of selection among sympatric marine species

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dc.contributor.authorNielsen, Erica S.en_ZA
dc.contributor.authorHenriques, Rominaen_ZA
dc.contributor.authorBeger, Mariaen_ZA
dc.contributor.authorToonen, Robert J.en_ZA
dc.contributor.authorVon der Heyden, Sophieen_ZA
dc.date.accessioned2020-10-12T10:40:25Z
dc.date.available2020-10-12T10:40:25Z
dc.date.issued2020-09-16
dc.date.updated2020-09-20T03:32:14Z
dc.descriptionCITATION: Nielsen, E. S., et al. 2020. Multi-model seascape genomics identifies distinct environmental drivers of selection among sympatric marine species. BMC Evolutionary Biology, 20:121, doi:10.1186/s12862-020-01679-4.
dc.descriptionThe original publication is available at https://bmcevolbiol.biomedcentral.com
dc.description.abstractBackground: As global change and anthropogenic pressures continue to increase, conservation and management increasingly needs to consider species’ potential to adapt to novel environmental conditions. Therefore, it is imperative to characterise the main selective forces acting on ecosystems, and how these may influence the evolutionary potential of populations and species. Using a multi-model seascape genomics approach, we compare putative environmental drivers of selection in three sympatric southern African marine invertebrates with contrasting ecology and life histories: Cape urchin (Parechinus angulosus), Common shore crab (Cyclograpsus punctatus), and Granular limpet (Scutellastra granularis). Results: Using pooled (Pool-seq), restriction-site associated DNA sequencing (RAD-seq), and seven outlier detection methods, we characterise genomic variation between populations along a strong biogeographical gradient. Of the three species, only S. granularis showed significant isolation-by-distance, and isolation-by-environment driven by sea surface temperatures (SST). In contrast, sea surface salinity (SSS) and range in air temperature correlated more strongly with genomic variation in C. punctatus and P. angulosus. Differences were also found in genomic structuring between the three species, with outlier loci contributing to two clusters in the East and West Coasts for S. granularis and P. angulosus, but not for C. punctatus. Conclusion: The findings illustrate distinct evolutionary potential across species, suggesting that species-specific habitat requirements and responses to environmental stresses may be better predictors of evolutionary patterns than the strong environmental gradients within the region. We also found large discrepancies between outlier detection methodologies, and thus offer a novel multi-model approach to identifying the principal environmental selection forces acting on species. Overall, this work highlights how adding a comparative approach to seascape genomics (both with multiple models and species) can elucidate the intricate evolutionary responses of ecosystems to global change.
dc.description.urihttps://bmcevolbiol.biomedcentral.com/articles/10.1186/s12862-020-01679-4
dc.description.versionPublisher's version
dc.format.extent17 pages : illustrationsen_ZA
dc.identifier.citationNielsen, E. S., et al. 2020. Multi-model seascape genomics identifies distinct environmental drivers of selection among sympatric marine species. BMC Evolutionary Biology, 20:121, doi:10.1186/s12862-020-01679-4
dc.identifier.issn1471-2148 (online)
dc.identifier.otherdoi:10.1186/s12862-020-01679-4
dc.identifier.urihttp://hdl.handle.net/10019.1/108879
dc.language.isoen_ZAen_ZA
dc.publisherBMC (part of Springer Nature)
dc.rights.holderAuthors retain copyright
dc.subjectMarine invertebratesen_ZA
dc.subjectGenomicsen_ZA
dc.subjectConservation geneticsen_ZA
dc.subjectGenetic diversityen_ZA
dc.subjectPhylogeographyen_ZA
dc.subjectEnvironmentalismen_ZA
dc.subjectCyclographsus punctatus -- Genomicsen_ZA
dc.subjectParechinus angulosus -- Genomicsen_ZA
dc.subjectScutellastra granularis -- Genomicsen_ZA
dc.subjectDNA (RAD) sequencingen_ZA
dc.titleMulti-model seascape genomics identifies distinct environmental drivers of selection among sympatric marine speciesen_ZA
dc.typeArticleen_ZA
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