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A diverse Ediacara assemblage survived under low-oxygen conditions

dc.contributor.authorCherry, Lucas B.
dc.contributor.authorGilleaudeau, Geoffrey J
dc.contributor.authorGrazhdankin, Dmitry
dc.contributor.authorRomaniello, Stephen
dc.contributor.authorMartin, Aaron James
dc.contributor.authorKaufman, Alan Jay
dc.date.accessioned2023-06-14T16:12:28Z
dc.date.available2023-06-14T16:12:28Z
dc.date.issued2022
dc.identifier.citationCherry, L.B., Gilleaudeau, G.J., Grazhdankin, D.V. et al. A diverse Ediacara assemblage survived under low-oxygen conditions. Nat Commun 13, 7306 (2022). https://doi.org/10.1038/s41467-022-35012-y
dc.identifier.urihttp://hdl.handle.net/11627/6349
dc.description.abstract"The Ediacaran biota were soft-bodied organisms, many with enigmatic phylogenetic placement and ecology, living in marine environments between 574 and 539 million years ago. Some studies hypothesize a metazoan affinity and aerobic metabolism for these taxa, whereas others propose a fundamentally separate taxonomic grouping and a reliance on chemoautotrophy. To distinguish between these hypotheses and test the redox-sensitivity of Ediacaran organisms, here we present a high-resolution local and global redox dataset from carbonates that contain in situ Ediacaran fossils from Siberia. Cerium anomalies are consistently >1, indicating that local environments, where a diverse Ediacaran assemblage is preserved in situ as nodules and carbonaceous compressions, were pervasively anoxic. Additionally, delta U-238 values match other terminal Ediacaran sections, indicating widespread marine euxinia. These data suggest that some Ediacaran biotas were tolerant of at least intermittent anoxia, and thus had the capacity for a facultatively anaerobic lifestyle. Alternatively, these soft-bodied Ediacara organisms may have colonized the seafloor during brief oxygenation events not recorded by redox proxy data. Broad temporal correlations between carbon, sulfur, and uranium isotopes further highlight the dynamic redox landscape of Ediacaran-Cambrian evolutionary events."
dc.publisherSpringer Nature
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectUramium isotope evidence
dc.subjectDoushantuo formation
dc.subjectCambrian radiation
dc.subjectSuperheavy pyrite
dc.subjectOcean oxygenation
dc.subjectOlenek uplift
dc.subjectAnoxia
dc.subjectBasin
dc.subjectEvolution
dc.subjectSeawater
dc.subject.classificationCIENCIAS TECNOLÓGICAS
dc.titleA diverse Ediacara assemblage survived under low-oxygen conditions
dc.typearticle
dc.identifier.doihttps://doi.org/10.1038/s41467-022-35012-y
dc.rights.accessAcceso Abierto


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Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 Internacional