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DOI	10.1038/s41561-022-01034-w
	Early and late phases of the Permian-Triassic mass extinction marked by different atmospheric CO2 regimes
	Shen, Jiaheng; Zhang, Yi Ge; Yang, Huan; Xie, Shucheng; Pearson, Ann
发表日期	2022
ISSN	1752-0894
EISSN	1752-0908
起始页码	839
结束页码	+
卷号	15 期号:10 页码:20
英文摘要	The Permian-Triassic mass extinction is characterized by a massive injection of carbon dioxide associated with Siberian Traps volcanism, pronounced global warming and ocean acidification. However, in the absence of high-resolution records of atmospheric CO2(p(CO2)), detailed changes in the carbon cycle and their relationship to biosphere perturbations remain unresolved. Here we present a continuous and high-resolution p(CO2) record and quantitative estimates of marine phytoplankton community structure across this interval, using carbon and nitrogen isotope analyses of chlorophyll degradation products from the Shangsi section, China. We find that the first extinction pulse in the latest Permian coincided with a minimum in p(CO2), which was followed by a rapid rise to a prolonged high p(CO2) interval that persisted through the second extinction pulse in the Early Triassic, and that cyanobacteria increasingly dominated marine export production between these two pulses. While the first extinction appears to have been associated with intense initial weathering that briefly suppressed the p(CO2) rise and promoted eutrophy and anoxia-driven habitat loss, incorporating our observations into a biogeochemical model indicates the second extinction was sustained by reduced export production driven by the expansion of bacterial production in response to oligotrophic conditions. Such conditions were potentially caused by a long-term failure of the weathering feedback and may mark a catastrophic combination of food web collapse, hyperthermal climate and hypercapnia.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000865214900002
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/272556
作者单位	Peking University; Texas A&M University System; Texas A&M University College Station; China University of Geosciences; China University of Geosciences; Harvard University
推荐引用方式 GB/T 7714	Shen, Jiaheng,Zhang, Yi Ge,Yang, Huan,et al. Early and late phases of the Permian-Triassic mass extinction marked by different atmospheric CO2 regimes[J],2022,15(10):20.
APA	Shen, Jiaheng,Zhang, Yi Ge,Yang, Huan,Xie, Shucheng,&Pearson, Ann.(2022).Early and late phases of the Permian-Triassic mass extinction marked by different atmospheric CO2 regimes.NATURE GEOSCIENCE,15(10),20.
MLA	Shen, Jiaheng,et al."Early and late phases of the Permian-Triassic mass extinction marked by different atmospheric CO2 regimes".NATURE GEOSCIENCE 15.10(2022):20.