气候变化领域集成服务门户(CCPortal): Phosphorus-limited conditions in the early Neoproterozoic ocean maintained low levels of atmospheric oxygen

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DOI	10.1038/s41561-020-0548-7
	Phosphorus-limited conditions in the early Neoproterozoic ocean maintained low levels of atmospheric oxygen
	Guilbaud R.; Poulton S.W.; Thompson J.; Husband K.F.; Zhu M.; Zhou Y.; Shields G.A.; Lenton T.M.
发表日期	2020
ISSN	17520894
英文摘要	The redox chemistry of anoxic continental margin settings evolved from widespread sulfide-containing (euxinic) conditions to a global ferruginous (iron-containing) state in the early Neoproterozoic era (from ~1 to 0.8 billion years ago). Ocean redox chemistry exerts a strong control on the biogeochemical cycling of phosphorus, a limiting nutrient, and hence on primary production, but the response of the phosphorus cycle to this major ocean redox transition has not been investigated. Here, we use a geochemical speciation technique to investigate the phase partitioning of phosphorus in an open marine, early Neoproterozoic succession from the Huainan Basin, North China. We find that effective removal of bioavailable phosphorus in association with iron minerals in a globally ferruginous ocean resulted in oligotrophic (nutrient limited) conditions, and hence a probable global decrease in primary production, organic carbon burial and, subsequently, oxygen production. Nevertheless, phosphorus availability and organic carbon burial were sufficient to maintain an oxidizing atmosphere. These data imply substantial nutrient-driven variability in atmospheric oxygen levels through the Proterozoic, rather than the stable levels commonly invoked. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
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/124520
作者单位	Géosciences Environnement Toulouse, Université de Toulouse, CNRS, Toulouse, France; School of Earth and Environment, University of Leeds, Leeds, United Kingdom; State Key Laboratory of Palaeobiology and Stratigraphy and Center for Excellence in Life and Paleoenvironment, Nanjing Institute of Geology and Palaeontology, Nanjing, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China; Department of Earth Sciences, University College London, London, United Kingdom; Global Systems Institute, University of Exeter, Exeter, United Kingdom
推荐引用方式 GB/T 7714	Guilbaud R.,Poulton S.W.,Thompson J.,et al. Phosphorus-limited conditions in the early Neoproterozoic ocean maintained low levels of atmospheric oxygen[J],2020.
APA	Guilbaud R..,Poulton S.W..,Thompson J..,Husband K.F..,Zhu M..,...&Lenton T.M..(2020).Phosphorus-limited conditions in the early Neoproterozoic ocean maintained low levels of atmospheric oxygen.Nature Geoscience.
MLA	Guilbaud R.,et al."Phosphorus-limited conditions in the early Neoproterozoic ocean maintained low levels of atmospheric oxygen".Nature Geoscience (2020).