气候变化领域集成服务门户(CCPortal): Early Middle Triassic trace fossils from the Luoping Biota; southwestern China: Evidence of recovery from mass extinction

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DOI	10.1016/j.palaeo.2017.11.028
	Early Middle Triassic trace fossils from the Luoping Biota; southwestern China: Evidence of recovery from mass extinction
	Luo M.; Shi G.R.; Hu S.; Benton M.J.; Chen Z.-Q.; Huang J.; Zhang Q.; Zhou C.; Wen W.
发表日期	2019
ISSN	0031-0182
起始页码	6
结束页码	22
卷号	515
英文摘要	Trace fossils have proven useful for studying the timing and process of biotic recovery after the Permian–Triassic Mass Extinction (PTME). Recovery stages are defined by comparing successive ichnoassemblages from the latest Permian to the early Middle Triassic. Lower Triassic trace fossils have been explored in some detail, but those of the lower Middle Triassic are less well known. Here, well-preserved fossil materials from the Luoping Biota from Yunnan Province, South China suggest that a fully recovered shallow-marine ecosystem was re-established by the early Middle Triassic. Trace fossil assemblages of the Luoping Biota are characterized by high ichnodiversity, with 14 ichnogenera in the shallow-marine environment of an intra-carbonate platform basin, and nine ichnogenera in the subtidal environment. Such moderate to high ichnodiversity, together with a marked increase in burrow sizes and the common occurrence of key ichnotaxa (e.g. Rhizocorallium and Thalassinoides), suggests that the ichnofauna had reached recovery stage four. In contrast, non-turbiditic strata of the offshore setting record only three ichnogenera, with bioturbation indices never exceeding one. Periodic anoxia in bottom waters was presumably the main control for such a protracted trace fossil recovery in an offshore setting, which otherwise aided the fine preservation of body fossils of the Luoping Biota. Furthermore, event sedimentation (turbidite deposits) in the offshore setting incorporated moderate ichnodiversity and moderate to high bioturbation indices, both interpreted as a result of short-term colonization by transported infaunal animals from proximal settings. The occurrence of variable crustacean traces (e.g. Sinusichnus, Spongeliomorpha, and Thalassinoides) at Luoping and the locomotion traces of marine reptiles, together with abundant fishes and fossil decapods, highlights the value of trace fossils in ecosystem reconstruction after the PTME. © 2017 Elsevier B.V.
英文关键词	Biotic recovery; Guanling Formation; Ichnological parameter; South China; Yunnan
语种	英语
scopus关键词	anoxia; bioturbation; colonization; crustacean; fossil assemblage; ichnology; marine ecosystem; marine environment; mass extinction; parameter estimation; Permian; reconstruction; sedimentation; subtidal environment; trace fossil; Triassic; China; China; Yunnan; Animalia; Crustacea; Pisces; Reptilia; Rhizocorallium; Sinusichnus; Thalassinoides
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/151123
作者单位	Deakin University, Geelong, Australia; School of Life and Environmental Sciences, Melbourne Burwood Campus. 221, Burwood Highway, Burwood, Victoria 3125, Australia; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China; State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, 430074, China; Chengdu Centre of China Geological Survey, Chengdu, 610081, China; School of Earth Sciences, University of Bristol, Bristol, BS8 1RJ, United Kingdom
推荐引用方式 GB/T 7714	Luo M.,Shi G.R.,Hu S.,et al. Early Middle Triassic trace fossils from the Luoping Biota; southwestern China: Evidence of recovery from mass extinction[J],2019,515.
APA	Luo M..,Shi G.R..,Hu S..,Benton M.J..,Chen Z.-Q..,...&Wen W..(2019).Early Middle Triassic trace fossils from the Luoping Biota; southwestern China: Evidence of recovery from mass extinction.Palaeogeography, Palaeoclimatology, Palaeoecology,515.
MLA	Luo M.,et al."Early Middle Triassic trace fossils from the Luoping Biota; southwestern China: Evidence of recovery from mass extinction".Palaeogeography, Palaeoclimatology, Palaeoecology 515(2019).