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DOI	10.1016/j.palaeo.2019.05.011
	How quick was marine recovery after the end-Triassic mass extinction and what role did anoxia play?
	Atkinson J.W.; Wignall P.B.
发表日期	2019
ISSN	0031-0182
起始页码	99
结束页码	119
卷号	528
英文摘要	Oxygen restricted conditions were widespread in European shelf seas after the end-Triassic mass extinction event and they are reported to have hindered the recovery of marine benthos. Here we reconstruct the redox history of the Early Jurassic Blue Lias Formation of southwest Britain using pyrite framboid size analysis and compare this with the recovery of bivalves based on field and museum collections. Results suggest widespread dysoxia punctuated by periods of anoxia in the region, with the latter developing frequently in deeper water settings. Despite these harsh conditions, initial benthic recovery occurred rapidly in the British Jurassic, especially in shallowest settings, and shows no relationship with the intensity of dysoxia. A stable diversity was reached by the first recognised ammonite zone after the end-Triassic mass extinction. This contrasts with the deeper-water, more oxygen-poor sections where the diversity increase was still continuing in the earliest Sinemurian Stage, considerably longer than previously reported. Similar recovery rates are seen amongst other groups (brachiopods and ammonites). Oxygen-poor conditions have been suggested to delay recovery after the Permo-Triassic mass extinction, but this is not the case after the end-Triassic crisis. We suggest that this was because the European dysoxia was only a regional phenomenon and there were plenty of well-ventilated regions available to allow an untrammelled bounce back. © 2019 Elsevier B.V.
英文关键词	Benthic recovery; Blue Lias Formation; Diversification; Early Jurassic; Pyrite framboids
语种	英语
scopus关键词	ammonite; anoxic conditions; benthos; bivalve; Jurassic; mass extinction; pyrite; Sinemurian; Triassic; United Kingdom; Ammonoidea; Bivalvia; Brachiopoda
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150931
作者单位	School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, United Kingdom
推荐引用方式 GB/T 7714	Atkinson J.W.,Wignall P.B.. How quick was marine recovery after the end-Triassic mass extinction and what role did anoxia play?[J],2019,528.
APA	Atkinson J.W.,&Wignall P.B..(2019).How quick was marine recovery after the end-Triassic mass extinction and what role did anoxia play?.Palaeogeography, Palaeoclimatology, Palaeoecology,528.
MLA	Atkinson J.W.,et al."How quick was marine recovery after the end-Triassic mass extinction and what role did anoxia play?".Palaeogeography, Palaeoclimatology, Palaeoecology 528(2019).