气候变化领域集成服务门户(CCPortal): Infaunal Response During the End-Permian Mass Extinction

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DOI	10.1130/B35524.1
	Infaunal Response During the End-Permian Mass Extinction
	Luo M.; Buatois L.A.; Shi >G.R.; Chen A.-Q.
发表日期	2020
ISSN	167606
起始页码	91
结束页码	99
卷号	133
英文摘要	The end-Permian mass extinction (EPME) profoundly shaped shallow marine ecosystems. Although much has been learned about this event based on the body-fossil record, the global infaunal response to the EPME, as represented by ichnofossils, is much less understood. Here we analyze secular changes in ichnodiversity and ichnodisparity from the late Permian to the Middle Triassic based on a global trace-fossil data set. Results show that, in contrast to the body-fossil record, late Permian global ichnodiversity and ichnodisparity maintained their level until the Griesbachian, followed by a sharp loss in the Dienerian. Notably, the Griesbachian shows an unusual dominance of shallower tiers. The discrepancy between the body- and tracefossil record is interpreted to be the result of the resurgence of widespread microbial matgrounds in the Griesbachian that aided the preservation of surface, semi-infaunal, and shallow-tier ichnofossils. Our study shows that the EPME strongly affected the sediment mixed layer, allowing the preservation of shallower tier trace fossils. The disappearance of the mixed layer in the earliest Triassic may have enhanced pyrite burial in sediments and inhibited its further re-oxidation, therefore impacting sea water sulfate concentrations. © 2020 Geological Society of America
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184774
作者单位	State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, 39 East Beijing Road, Nanjing, 210008, United States; Department of Geological Sciences, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada; School of Earth, Atmospheric and Life Sciences, University of Wollongong, Northfields AvenueNSW 2522, Australia; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Wuhan), Wuhan, 430074, China; University of Chinese Academy of Sciences, Beijing, 100049, United States
推荐引用方式 GB/T 7714	Luo M.,Buatois L.A.,Shi >G.R.,et al. Infaunal Response During the End-Permian Mass Extinction[J],2020,133.
APA	Luo M.,Buatois L.A.,Shi >G.R.,&Chen A.-Q..(2020).Infaunal Response During the End-Permian Mass Extinction.Bulletin of the Geological Society of America,133.
MLA	Luo M.,et al."Infaunal Response During the End-Permian Mass Extinction".Bulletin of the Geological Society of America 133(2020).