Mid-latitudinal habitable environment for marine eukaryotes during the waning stage of the Marinoan snowball glaciation

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dc.contributor.authorSong, Huyueen
dc.contributor.authorAn, Zhihuien
dc.contributor.authorYe, Qinen
dc.contributor.authorStueken, Eva E.en
dc.contributor.authorLi, Jingen
dc.contributor.authorHu, Junen
dc.contributor.authorAlgeo, Thomas J.en
dc.contributor.authorTian, Lien
dc.contributor.authorChu, Daoliangen
dc.contributor.authorSong, Haijunen
dc.contributor.authorXiao, Shuhaien
dc.contributor.authorTong, Jinnanen
dc.date.accessioned2023-09-11T17:37:50Zen
dc.date.available2023-09-11T17:37:50Zen
dc.date.issued2023-04en
dc.description.abstractBased on geochemical and paleontological data, this study shows that habitable open-oceans extended to mid-latitude coastal oceans during the waning stage of the Marinoan snowball Earth, offering refugia for benthic photosynthetic eukaryotes During the Marinoan Ice Age (ca. 654-635 Ma), one of the 'Snowball Earth' events in the Cryogenian Period, continental icesheets reached the tropical oceans. Oceanic refugia must have existed for aerobic marine eukaryotes to survive this event, as evidenced by benthic phototrophic macroalgae of the Songluo Biota preserved in black shales interbedded with glacial diamictites of the late Cryogenian Nantuo Formation in South China. However, the environmental conditions that allowed these organisms to thrive are poorly known. Here, we report carbon-nitrogen-iron geochemical data from the fossiliferous black shales and adjacent diamictites of the Nantuo Formation. Iron-speciation data document dysoxic-anoxic conditions in bottom waters, whereas nitrogen isotopes record aerobic nitrogen cycling perhaps in surface waters. These findings indicate that habitable open-ocean conditions were more extensive than previously thought, extending into mid-latitude coastal oceans and providing refugia for eukaryotic organisms during the waning stage of the Marinoan Ice Age.en
dc.description.notesAcknowledgementsWe would like thank Professor Chao Li (now at Chengdu University of Technology) for the support of the iron species analyzes in his lab at BGEG. We thank Yong Du and Teng Xing for lab assistance. This research was supported by the National Natural Science Foundation of China (42172032; 41872033) to H-Y.S., and the China Geological Survey (1212011120787, 12120114066301) to J.T.en
dc.description.sponsorshipNational Natural Science Foundation of China [42172032, 41872033]; China Geological Survey [1212011120787, 12120114066301]en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1038/s41467-023-37172-xen
dc.identifier.eissn2041-1723en
dc.identifier.issue1en
dc.identifier.other1564en
dc.identifier.pmid37015913en
dc.identifier.urihttp://hdl.handle.net/10919/116262en
dc.identifier.volume14en
dc.language.isoenen
dc.publisherNature Portfolioen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectcryogenian nantuo formationen
dc.subjectferruginous conditionsen
dc.subjectnitrogen isotopesen
dc.subjectearthen
dc.subjectclimateen
dc.subjectproxiesen
dc.subjectoceanen
dc.subjectriseen
dc.subjectironen
dc.subjectageen
dc.titleMid-latitudinal habitable environment for marine eukaryotes during the waning stage of the Marinoan snowball glaciationen
dc.title.serialNature Communicationsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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