气候变化领域集成服务门户(CCPortal): Possible links between extreme oxygen perturbations and the Cambrian radiation of animals

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DOI	10.1038/s41561-019-0357-z
	Possible links between extreme oxygen perturbations and the Cambrian radiation of animals
	He T.; Zhu M.; Mills B.J.W.; Wynn P.M.; Zhuravlev A.Y.; Tostevin R.; Pogge von Strandmann P.A.E.; Yang A.; Poulton S.W.; Shields G.A.
发表日期	2019
ISSN	17520894
卷号	12 期号:6
英文摘要	The role of oxygen as a driver for early animal evolution is widely debated. During the Cambrian explosion, episodic radiations of major animal phyla occurred coincident with repeated carbon isotope fluctuations. However, the driver of these isotope fluctuations and potential links to environmental oxygenation are unclear. Here we report high-resolution carbon and sulfur isotope data for marine carbonates from the southeastern Siberian Platform that document the canonical explosive phase of the Cambrian radiation from ~524 to ~514 Myr ago. These analyses demonstrate a strong positive covariation between carbonate δ13C and carbonate-associated sulfate δ34S through five isotope cycles. Biogeochemical modelling suggests that this isotopic coupling reflects periodic oscillations in the atmospheric O2 and the extent of shallow-ocean oxygenation. Episodic maxima in the biodiversity of animal phyla directly coincided with these extreme oxygen perturbations. Conversely, the subsequent Botoman–Toyonian animal extinction events (~514 to ~512 Myr ago) coincided with decoupled isotope records that suggest a shrinking marine sulfate reservoir and expanded shallow marine anoxia. We suggest that fluctuations in oxygen availability in the shallow marine realm exerted a primary control on the timing and tempo of biodiversity radiations at a crucial phase in the early history of animal life. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	animal community; biodiversity; Cambrian; carbon isotope; carbonate; extinction; marine environment; oxygen; oxygenation; perturbation; sulfur isotope; Russian Federation; Siberian Platform; Animalia
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124659
作者单位	London Geochemistry and Isotope Centre (LOGIC), Institute of Earth and Planetary Sciences, University College London and Birkbeck, University of London, London, United Kingdom; School of Earth and Environment, University of Leeds, Leeds, United Kingdom; State Key Laboratory of Palaeobiology and Stratigraphy & Center for Excellence in Life and Paleoenvironment, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China; College of Earth Sciences, University of Chinese Academy of Sciences, Beijing, China; Lancaster Environment Centre, Lancaster University, Lancaster, United Kingdom; Department of Biological Evolution, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russian Federation; Department of Earth Sciences, University of Oxford, Oxford, United Kingdom; State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing, China
推荐引用方式 GB/T 7714	He T.,Zhu M.,Mills B.J.W.,et al. Possible links between extreme oxygen perturbations and the Cambrian radiation of animals[J],2019,12(6).
APA	He T..,Zhu M..,Mills B.J.W..,Wynn P.M..,Zhuravlev A.Y..,...&Shields G.A..(2019).Possible links between extreme oxygen perturbations and the Cambrian radiation of animals.Nature Geoscience,12(6).
MLA	He T.,et al."Possible links between extreme oxygen perturbations and the Cambrian radiation of animals".Nature Geoscience 12.6(2019).