Extensive marine anoxia during the terminal ediacaran period

Feifei Zhang, Shuhai Xiao, Brian Kendall, Stephen J. Romaniello, Huan Cui, Mike Meyer, Geoffrey J. Gilleaudeau, Alan J. Kaufman, Ariel Anbar

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The terminal Ediacaran Period witnessed the decline of the Ediacara biota (which may have included many stem-group animals). To test whether oceanic anoxia might have played a role in this evolutionary event, we measured U isotope compositions (d238U) in sedimentary carbonates from the Dengying Formation of South China to obtain new constraints on the extent of global redox change during the terminal Ediacaran. We found the most negative carbonate d238U values yet reported (−0.95 per mil), which were reproduced in two widely spaced coeval sections spanning the terminal Ediacaran Period (551 to 541 million years ago). Mass balance modeling indicates an episode of extensive oceanic anoxia, during which anoxia covered >21% of the seafloor and most U entering the oceans was removed into sediments below anoxic waters. The results suggest that an expansion of oceanic anoxia and temporal-spatial redox heterogeneity, independent of other environmental and ecological factors, may have contributed to the decline of the Ediacara biota and may have also stimulated animal motility.

Original languageEnglish (US)
Article numbereaan8983
JournalScience advances
Volume4
Issue number6
DOIs
StatePublished - Jun 20 2018

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Ediacaran
anoxia
biota
carbonate
animal
motility
mass balance
environmental factor
seafloor
stem
isotope
ocean
sediment
modeling
water

ASJC Scopus subject areas

  • General

Cite this

Zhang, F., Xiao, S., Kendall, B., Romaniello, S. J., Cui, H., Meyer, M., ... Anbar, A. (2018). Extensive marine anoxia during the terminal ediacaran period. Science advances, 4(6), [eaan8983]. https://doi.org/10.1126/sciadv.aan8983

Extensive marine anoxia during the terminal ediacaran period. / Zhang, Feifei; Xiao, Shuhai; Kendall, Brian; Romaniello, Stephen J.; Cui, Huan; Meyer, Mike; Gilleaudeau, Geoffrey J.; Kaufman, Alan J.; Anbar, Ariel.

In: Science advances, Vol. 4, No. 6, eaan8983, 20.06.2018.

Research output: Contribution to journalArticle

Zhang, F, Xiao, S, Kendall, B, Romaniello, SJ, Cui, H, Meyer, M, Gilleaudeau, GJ, Kaufman, AJ & Anbar, A 2018, 'Extensive marine anoxia during the terminal ediacaran period', Science advances, vol. 4, no. 6, eaan8983. https://doi.org/10.1126/sciadv.aan8983
Zhang F, Xiao S, Kendall B, Romaniello SJ, Cui H, Meyer M et al. Extensive marine anoxia during the terminal ediacaran period. Science advances. 2018 Jun 20;4(6). eaan8983. https://doi.org/10.1126/sciadv.aan8983
Zhang, Feifei ; Xiao, Shuhai ; Kendall, Brian ; Romaniello, Stephen J. ; Cui, Huan ; Meyer, Mike ; Gilleaudeau, Geoffrey J. ; Kaufman, Alan J. ; Anbar, Ariel. / Extensive marine anoxia during the terminal ediacaran period. In: Science advances. 2018 ; Vol. 4, No. 6.
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