Heterogenous oceanic redox conditions through the Ediacaran-Cambrian boundary limited the metazoan zonation

Abstract Recent studies have enhanced our understanding of the linkage of oxygenation and metazoan evolution in Early Cambrian time. However, little of this work has addressed the apparent lag of animal diversification and atmospheric oxygenation during this critical period of Earth history. This st...

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Autores principales:	Junpeng Zhang, Tailiang Fan, Yuandong Zhang, Gary G. Lash, Yifan Li, Yue Wu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f92194b5f20d41dd87edafc884747455
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spelling	oai:doaj.org-article:f92194b5f20d41dd87edafc8847474552021-12-02T11:53:06ZHeterogenous oceanic redox conditions through the Ediacaran-Cambrian boundary limited the metazoan zonation10.1038/s41598-017-07904-32045-2322https://doaj.org/article/f92194b5f20d41dd87edafc8847474552017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07904-3https://doaj.org/toc/2045-2322Abstract Recent studies have enhanced our understanding of the linkage of oxygenation and metazoan evolution in Early Cambrian time. However, little of this work has addressed the apparent lag of animal diversification and atmospheric oxygenation during this critical period of Earth history. This study utilizes the geochemical proxy and N isotope record of the Ediacaran–Cambrian boundary preserved in intra-shelf basin, slope, and slope basin deposits of the Yangtze Sea to assess the ocean redox state during the Early Cambrian metazoan radiation. Though ferruginous conditions appear to have prevailed through the water column during this time, episodes of local bottom-water anoxia extending into the photic-zone impacted the slope belt of the basin. Heterogenous oceanic redox conditions are expressed by trace element concentrations and Fe speciation, and spatial variation of N isotopes. We propose that the coupling of ocean chemistry and Early Cambrian animal diversification was not a simple cause-and-effect relationship, but rather a complex interaction. Specifically, it is likely that animal diversification expanded not only temporally but also spatially from the shallow shelf to deep-water environments in tandem with progressive oxygenation of the extensive continental margin.Junpeng ZhangTailiang FanYuandong ZhangGary G. LashYifan LiYue WuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Junpeng Zhang Tailiang Fan Yuandong Zhang Gary G. Lash Yifan Li Yue Wu Heterogenous oceanic redox conditions through the Ediacaran-Cambrian boundary limited the metazoan zonation
description	Abstract Recent studies have enhanced our understanding of the linkage of oxygenation and metazoan evolution in Early Cambrian time. However, little of this work has addressed the apparent lag of animal diversification and atmospheric oxygenation during this critical period of Earth history. This study utilizes the geochemical proxy and N isotope record of the Ediacaran–Cambrian boundary preserved in intra-shelf basin, slope, and slope basin deposits of the Yangtze Sea to assess the ocean redox state during the Early Cambrian metazoan radiation. Though ferruginous conditions appear to have prevailed through the water column during this time, episodes of local bottom-water anoxia extending into the photic-zone impacted the slope belt of the basin. Heterogenous oceanic redox conditions are expressed by trace element concentrations and Fe speciation, and spatial variation of N isotopes. We propose that the coupling of ocean chemistry and Early Cambrian animal diversification was not a simple cause-and-effect relationship, but rather a complex interaction. Specifically, it is likely that animal diversification expanded not only temporally but also spatially from the shallow shelf to deep-water environments in tandem with progressive oxygenation of the extensive continental margin.
format	article
author	Junpeng Zhang Tailiang Fan Yuandong Zhang Gary G. Lash Yifan Li Yue Wu
author_facet	Junpeng Zhang Tailiang Fan Yuandong Zhang Gary G. Lash Yifan Li Yue Wu
author_sort	Junpeng Zhang
title	Heterogenous oceanic redox conditions through the Ediacaran-Cambrian boundary limited the metazoan zonation
title_short	Heterogenous oceanic redox conditions through the Ediacaran-Cambrian boundary limited the metazoan zonation
title_full	Heterogenous oceanic redox conditions through the Ediacaran-Cambrian boundary limited the metazoan zonation
title_fullStr	Heterogenous oceanic redox conditions through the Ediacaran-Cambrian boundary limited the metazoan zonation
title_full_unstemmed	Heterogenous oceanic redox conditions through the Ediacaran-Cambrian boundary limited the metazoan zonation
title_sort	heterogenous oceanic redox conditions through the ediacaran-cambrian boundary limited the metazoan zonation
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/f92194b5f20d41dd87edafc884747455
work_keys_str_mv	AT junpengzhang heterogenousoceanicredoxconditionsthroughtheediacarancambrianboundarylimitedthemetazoanzonation AT tailiangfan heterogenousoceanicredoxconditionsthroughtheediacarancambrianboundarylimitedthemetazoanzonation AT yuandongzhang heterogenousoceanicredoxconditionsthroughtheediacarancambrianboundarylimitedthemetazoanzonation AT garyglash heterogenousoceanicredoxconditionsthroughtheediacarancambrianboundarylimitedthemetazoanzonation AT yifanli heterogenousoceanicredoxconditionsthroughtheediacarancambrianboundarylimitedthemetazoanzonation AT yuewu heterogenousoceanicredoxconditionsthroughtheediacarancambrianboundarylimitedthemetazoanzonation
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Heterogenous oceanic redox conditions through the Ediacaran-Cambrian boundary limited the metazoan zonation

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