气候变化领域集成服务门户(CCPortal): Early Triassic trace fossils from South China marginal-marine settings: Implications for biotic recovery following the end-Permian mass extinction

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DOI	10.1130/B31867.1
	Early Triassic trace fossils from South China marginal-marine settings: Implications for biotic recovery following the end-Permian mass extinction
	Zhang L.-J.; Buatois L.A.; Mángano M.G.; Qi Y.-A.; Tai C.
发表日期	2019
ISSN	167606
起始页码	235
结束页码	251
卷号	131 期号:2021-01-02
英文摘要	The Longmendong section is one of the few Early Triassic successions containing fluvial to marine deposits in South China. No trace fossils have been recorded in the fluvial deposits, but a total of 26 ichnospecies are reported from the Lower Triassic Dongchuan, Feixianguan and Jialingjiang formations in this section. This ichnofauna represents brackish- water conditions during the late Dienerian to Smithian, and fully shallow-marine settings in the Spathian. Several ichnologic metrics, such as ichnodiversity, ichnodisparity, ichnoabundance, bioturbation intensity, burrow size, and depth of bioturbation, have been analyzed in order to evaluate the role of environmental and evolutionary factors. Although the upward increases in ichnodiversity, ichnodisparity, burrow size, and bioturbation intensity may be linked to the biotic recovery after the end-Permian mass extinction, environmental controls also play an important role in this case. Transgressiveestuarine successions typically show a vertical decrease in the salinity stress, showing the passage of brackish-water ichnofaunas to more diverse associations showing more marine affinities. However, the vertical increase in depth of bioturbation cannot be explained by environmental controls alone, instead most likely reflecting the phase of biotic recovery. Overall, ichnologic data suggest that the brackish-water ecosystem was less impacted by the end-Permian mass extinction than the fully marine realm. The shallow, fully marine benthos completely recovered in the Spathian as is the case for other areas in South China. This study underscores the importance of a careful evaluation of sedimentary facies and environmental conditions as a prerequisite for interpreting evolutionary mechanisms of biotic recovery. © 2018 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/184977
作者单位	Institute of Resources and Environment, Henan Polytechnic University, Key Laboratory of Biogenic Traces and Sedimentary Minerals of Henan Province, Collab. Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region, Jiaozuo, 454003, China; Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, SK S7N 5E2, Canada
推荐引用方式 GB/T 7714	Zhang L.-J.,Buatois L.A.,Mángano M.G.,et al. Early Triassic trace fossils from South China marginal-marine settings: Implications for biotic recovery following the end-Permian mass extinction[J],2019,131(2021-01-02).
APA	Zhang L.-J.,Buatois L.A.,Mángano M.G.,Qi Y.-A.,&Tai C..(2019).Early Triassic trace fossils from South China marginal-marine settings: Implications for biotic recovery following the end-Permian mass extinction.Bulletin of the Geological Society of America,131(2021-01-02).
MLA	Zhang L.-J.,et al."Early Triassic trace fossils from South China marginal-marine settings: Implications for biotic recovery following the end-Permian mass extinction".Bulletin of the Geological Society of America 131.2021-01-02(2019).