Global marine redox changes drove the rise and fall of the Ediacara biota

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dc.contributor.authorZhang, Feifeien
dc.contributor.authorXiao, Shuhaien
dc.contributor.authorRomaniello, Stephen J.en
dc.contributor.authorHardisty, Daltonen
dc.contributor.authorLi, Chaoen
dc.contributor.authorMelezhik, Victoren
dc.contributor.authorPokrovsky, Borisen
dc.contributor.authorCheng, Mengen
dc.contributor.authorShi, Weien
dc.contributor.authorLenton, Timothy M.en
dc.contributor.authorAnbar, Ariel D.en
dc.date.accessioned2021-10-07T14:00:18Zen
dc.date.available2021-10-07T14:00:18Zen
dc.date.issued2019-07-28en
dc.date.updated2021-10-07T14:00:13Zen
dc.description.abstractThe role of O2 in the evolution of early animals, as represented by some members of the Ediacara biota, has been heavily debated because current geochemical evidence paints a conflicting picture regarding global marine O2 levels during key intervals of the rise and fall of the Ediacara biota. Fossil evidence indicates that the diversification the Ediacara biota occurred during or shortly after the Ediacaran Shuram negative C-isotope Excursion (SE), which is often interpreted to reflect ocean oxygenation. However, there is conflicting evidence regarding ocean oxygen levels during the SE and the middle Ediacaran Period. To help resolve this debate, we examined U isotope variations (δ238U) in three carbonate sections from South China, Siberia, and USA that record the SE. The δ238U data from all three sections are in excellent agreement and reveal the largest positive shift in δ238U ever reported in the geologic record (from ~ −0.74‰ to ~ −0.26‰). Quantitative modeling of these data suggests that the global ocean switched from a largely anoxic state (26%–100% of the seafloor overlain by anoxic waters) to near-modern levels of ocean oxygenation during the SE. This episode of ocean oxygenation is broadly coincident with the rise of the Ediacara biota. Following this initial radiation, the Ediacara biota persisted until the terminal Ediacaran period, when recently published U isotope data indicate a return to more widespread ocean anoxia. Taken together, it appears that global marine redox changes drove the rise and fall of the Ediacara biota.en
dc.description.versionPublished versionen
dc.format.extentPages 594-610en
dc.format.extent17 page(s)en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1111/gbi.12359en
dc.identifier.eissn1472-4669en
dc.identifier.issn1472-4677en
dc.identifier.issue6en
dc.identifier.orcidXiao, Shuhai [0000-0003-4655-2663]en
dc.identifier.pmid31353777en
dc.identifier.urihttp://hdl.handle.net/10919/105197en
dc.identifier.volume17en
dc.language.isoenen
dc.publisherWileyen
dc.relation.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000478338200001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=930d57c9ac61a043676db62af60056c1en
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectLife Sciences & Biomedicineen
dc.subjectPhysical Sciencesen
dc.subjectBiologyen
dc.subjectEnvironmental Sciencesen
dc.subjectGeosciences, Multidisciplinaryen
dc.subjectLife Sciences & Biomedicine - Other Topicsen
dc.subjectEnvironmental Sciences & Ecologyen
dc.subjectGeologyen
dc.subjectearly animalsen
dc.subjectNeoproterozoicen
dc.subjectocean oxygenationen
dc.subjectShuram negative carbon isotope excursionen
dc.subjecturanium isotopesen
dc.subjectCARBON-ISOTOPE EXCURSIONen
dc.subjectYANGTZE GORGES AREAen
dc.subjectSOUTH CHINA IMPLICATIONSen
dc.subjectURANIUM ISOTOPEen
dc.subjectJOHNNIE FORMATIONen
dc.subjectOCEAN OXYGENATIONen
dc.subjectDEATH-VALLEYen
dc.subjectDOUSHANTUO FORMATIONen
dc.subject1ST APPEARANCEen
dc.subjectSHURAMen
dc.subject0402 Geochemistryen
dc.subject0403 Geologyen
dc.subject0602 Ecologyen
dc.subjectGeochemistry & Geophysicsen
dc.subject.meshUraniumen
dc.subject.meshOxygenen
dc.subject.meshSeawateren
dc.subject.meshOxidation-Reductionen
dc.subject.meshGeologic Sedimentsen
dc.subject.meshPaleontologyen
dc.subject.meshUnited Statesen
dc.subject.meshChinaen
dc.subject.meshSiberiaen
dc.subject.meshOceans and Seasen
dc.subject.meshBiotaen
dc.titleGlobal marine redox changes drove the rise and fall of the Ediacara biotaen
dc.title.serialGeobiologyen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.otherArticleen
dc.type.otherJournalen
dcterms.dateAccepted2019-07-04en
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/Scienceen
pubs.organisational-group/Virginia Tech/Science/Geosciencesen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Science/COS T&R Facultyen

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