Diversification dynamics of a common deep-sea octocoral family linked to the Paleocene-Eocene thermal maximum

dc.creatorNúnez-Flores, Mónica
dc.creatorSolórzano, Andrés
dc.creatorAvaria-Llautureo, Jorge
dc.creatorGómez-Uchida, Daniel
dc.creatorLópez-González, Pablo J.
dc.date2023-11-30T17:25:43Z
dc.date2023-11-30T17:25:43Z
dc.date2024
dc.date.accessioned2024-05-02T20:31:52Z
dc.date.available2024-05-02T20:31:52Z
dc.identifierhttp://repositorio.ucm.cl/handle/ucm/5105
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/9275288
dc.descriptionThe deep-sea has experienced dramatic changes in physical and chemical variables in the geological past. However, little is known about how deep-sea species richness responded to such changes over time and space. Here, we studied the diversification dynamics of one of the most diverse octocorallian families inhabiting deep sea benthonic environments worldwide and sustaining highly diverse ecosystems, Primnoidae. A newly dated species-level phylogeny was constructed to infer their ancestral geographic locations and dispersal rates initially. Then, we tested whether their global and regional (the Southern Ocean) diversification dynamics were mediated by dispersal rate and abiotic factors as changes in ocean geochemistry. Finally, we tested whether primnoids showed changes in speciation and extinction at discrete time points. Our results suggested primnoids likely originated in the southwestern Pacific Ocean during the Lower Cretaceous ~112 Ma, with further dispersal after the physical separation of continental landmasses along the late Mesozoic and Cenozoic. Only the speciation rate of the Southern Ocean primnoids showed a significant correlation to ocean chemistry. Moreover, the PaleoceneEocene thermal maximum marked a significant increase in the diversification of primnoids at global and regional scales. Our results provide new perspectives on the macroevolutionary and biogeographic patterns of an ecologically important benthic organism typically found in deep-sea environments.
dc.languageen
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 Chile
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/
dc.sourceMolecular Phylogenetics and Evolution, 190, 107945
dc.subjectPETM
dc.subjectDiversification dynamics
dc.subjectHistorical biogeography
dc.subjectDeep-sea
dc.subjectSouthern Ocean
dc.subjectPrimnoidae
dc.titleDiversification dynamics of a common deep-sea octocoral family linked to the Paleocene-Eocene thermal maximum
dc.typeArticle


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