气候变化领域集成服务门户(CCPortal): Permian–Triassic mass extinction pulses driven by major marine carbon cycle perturbations

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DOI	10.1038/s41561-020-00646-4
	Permian–Triassic mass extinction pulses driven by major marine carbon cycle perturbations
	Jurikova H.; Gutjahr M.; Wallmann K.; Flögel S.; Liebetrau V.; Posenato R.; Angiolini L.; Garbelli C.; Brand U.; Wiedenbeck M.; Eisenhauer A.
发表日期	2020
ISSN	17520894
起始页码	745
结束页码	750
卷号	13 期号:11
英文摘要	The Permian/Triassic boundary approximately 251.9 million years ago marked the most severe environmental crisis identified in the geological record, which dictated the onwards course for the evolution of life. Magmatism from Siberian Traps is thought to have played an important role, but the causational trigger and its feedbacks are yet to be fully understood. Here we present a new boron-isotope-derived seawater pH record from fossil brachiopod shells deposited on the Tethys shelf that demonstrates a substantial decline in seawater pH coeval with the onset of the mass extinction in the latest Permian. Combined with carbon isotope data, our results are integrated in a geochemical model that resolves the carbon cycle dynamics as well as the ocean redox conditions and nitrogen isotope turnover. We find that the initial ocean acidification was intimately linked to a large pulse of carbon degassing from the Siberian sill intrusions. We unravel the consequences of the greenhouse effect on the marine environment, and show how elevated sea surface temperatures, export production and nutrient input driven by increased rates of chemical weathering gave rise to widespread deoxygenation and sporadic sulfide poisoning of the oceans in the earliest Triassic. Our findings enable us to assemble a consistent biogeochemical reconstruction of the mechanisms that resulted in the largest Phanerozoic mass extinction. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
英文关键词	boron isotope; brachiopod; carbon cycle; carbon isotope; chemical weathering; fossil record; geological record; historical record; marine ecosystem; mass extinction; ocean acidification; Permian-Triassic boundary; perturbation; trigger mechanism; Russian Federation; Siberian Platform
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/206796
作者单位	GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany; Helmholtz Zentrum Potsdam, Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany; Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, Ferrara, Italy; Dipartimento di Scienze della Terra, Università di Milano, Milan, Italy; Department of Earth Sciences, Brock University, St Catharines, ON, Canada; School of Earth and Environmental Sciences, University of St Andrews, St Andrews, United Kingdom
推荐引用方式 GB/T 7714	Jurikova H.,Gutjahr M.,Wallmann K.,等. Permian–Triassic mass extinction pulses driven by major marine carbon cycle perturbations[J],2020,13(11).
APA	Jurikova H..,Gutjahr M..,Wallmann K..,Flögel S..,Liebetrau V..,...&Eisenhauer A..(2020).Permian–Triassic mass extinction pulses driven by major marine carbon cycle perturbations.Nature Geoscience,13(11).
MLA	Jurikova H.,et al."Permian–Triassic mass extinction pulses driven by major marine carbon cycle perturbations".Nature Geoscience 13.11(2020).