Do Differences in Latitudinal Distributions of Species and Organelle Haplotypes Reflect Thermal Reaction Norms Within the Emiliania/Gephyrocapsa Complex?

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dc.contributor.authorvon Dassow, Peter
dc.contributor.authorMunoz Farias, Paula Valentina
dc.contributor.authorPinon, Sarah
dc.contributor.authorVelasco Senovilla, Esther
dc.contributor.authorAnguita Salinas, Simon
dc.date.accessioned2024-01-10T13:44:52Z
dc.date.available2024-01-10T13:44:52Z
dc.date.issued2021
dc.description.abstractThe cosmopolitan phytoplankter Emiliania huxleyi contrasts with its closest relatives that are restricted to narrower latitudinal bands, making it interesting for exploring how alternative outcomes in phytoplankton range distributions arise. Mitochondrial and chloroplast haplogroups within E. huxleyi are shared with their closest relatives: Some E. huxleyi share organelle haplogroups with Gephyrocapsa parvula and G. ericsonii which inhabit lower latitudes, while other E. huxleyi share organelle haplogroups with G. muellerae, which inhabit high latitudes. We investigated whether the phylogeny of E. huxleyi organelles reflects environmental gradients, focusing on the Southeast Pacific where the different haplogroups and species co-occur. There was a high congruence between mitochondrial and chloroplast haplogroups within E. huxleyi. Haplogroup II of E. huxleyi is negatively associated with cooler less saline waters, compared to haplogroup I, both when analyzed globally and across temporal variability at the small special scale of a center of coastal upwelling at 30 degrees S. A new mitochondrial haplogroup Ib detected in coastal Chile was associated with warmer waters. In an experiment focused on inter-species comparisons, laboratory-determined thermal reaction norms were consistent with latitudinal/thermal distributions of species, with G. oceanica exhibiting warm thermal optima and tolerance and G. muellerae exhibiting cooler thermal optima and tolerances. Emiliania huxleyi haplogroups I and II tended to exhibit a wider thermal niche compared to the other Gephyrocapsa, but no differences among haplogroups within E. huxleyi were found. A second experiment, controlling for local adaptation and time in culture, found a significant difference between E. huxleyi haplogroups. The difference between I and II was of the expected sign, but not the difference between I and Ib. The differences were small (<= 1 degrees C) compared to differences reported previously within E. huxleyi by local adaptation and even in-culture evolution. Haplogroup Ib showed a narrower thermal niche. The cosmopolitanism of E. huxleyi might result from both wide-spread generalist phenotypes and specialist phenotypes, as well as a capacity for local adaptation. Thermal reaction norm differences can well explain the species distributions but poorly explain distributions among mitochondrial haplogroups within E. huxleyi. Perhaps organelle haplogroup distributions reflect historical rather than selective processes.
dc.fechaingreso.objetodigital2024-05-23
dc.format.extent21 páginas
dc.fuente.origenWOS
dc.identifier.doi10.3389/fmars.2021.785763
dc.identifier.eissn2296-7745
dc.identifier.urihttps://doi.org/10.3389/fmars.2021.785763
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/78948
dc.identifier.wosidWOS:000730752500001
dc.information.autorucFacultad de Ciencias Biológicas; Von Dassow No Informado, Peter; S/I; 1009321
dc.language.isoen
dc.nota.accesocontenido completo
dc.publisherFRONTIERS MEDIA SA
dc.revistaFRONTIERS IN MARINE SCIENCE
dc.rightsacceso abierto
dc.subjectEmiliania huxleyi
dc.subjectGephyrocapsa
dc.subjectphytoplankton
dc.subjectthermal reaction norms
dc.subjectthermal performance curves
dc.subjecthaplogroup
dc.subjectcytochrome oxidase
dc.subjectEMILIANIA-HUXLEYI PRYMNESIOPHYCEAE
dc.subjectHUMBOLDT CURRENT SYSTEM
dc.subjectNATURAL-SELECTION
dc.subjectCLIMATE-CHANGE
dc.subjectIN-SITU
dc.subjectTEMPERATURE
dc.subjectGROWTH
dc.subjectCOCCOLITHOPHORES
dc.subjectEVOLUTION
dc.subjectCOASTAL
dc.subject.ods14 Life Below Water
dc.subject.ods13 Climate Action
dc.subject.odspa14 Vida submarina
dc.subject.odspa13 Acción por el clima
dc.titleDo Differences in Latitudinal Distributions of Species and Organelle Haplotypes Reflect Thermal Reaction Norms Within the Emiliania/Gephyrocapsa Complex?
dc.typeartículo
dc.volumen8
sipa.codpersvinculados1009321
sipa.indexWOS
sipa.trazabilidadCarga SIPA;09-01-2024
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