气候变化领域集成服务门户(CCPortal): A stable and productive marine microbial community was sustained through the end-Devonian Hangenberg Crisis within the Cleveland Shale of the Appalachian Basin, United States

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DOI	10.1111/gbi.12314
	A stable and productive marine microbial community was sustained through the end-Devonian Hangenberg Crisis within the Cleveland Shale of the Appalachian Basin, United States
	Martinez A.M.; Boyer D.L.; Droser M.L.; Barrie C.; Love G.D.
发表日期	2019
ISSN	14724677
起始页码	27
结束页码	42
卷号	17 期号:1
英文摘要	The end-Devonian Hangenberg Crisis constituted one of the greatest ecological and environmental perturbations of the Paleozoic Era. To date, however, it has been difficult to precisely constrain the occurrence of the Hangenberg Crisis in the Appalachian Basin of the United States and thus to directly assess the effects of this crisis on marine microbial communities and paleoenvironmental conditions. Here, we integrate organic and inorganic chemostratigraphic records compiled from two discrete outcrop locations to characterize the onset and paleoenvironmental transitions associated with the Hangenberg Crisis within the Cleveland Shale member of the Ohio Shale. The upper Cleveland Shale records both positive carbon (δ 13 C org ) and nitrogen (δ 15 N total ) isotopic excursions, and replenished trace metal inventories with links to eustatic rise. These dual but apparently temporally offset isotope excursions may be useful for stratigraphic correlation with other productive end-Devonian epeiric marine locations. Deposition of the black shale succession occurred locally beneath a redox-stratified water column with euxinic zones, with signs of strengthening denitrification during the Hangenberg Crisis interval, but with an otherwise stable and algal-rich marine microbial community structure sustained in the surface mixed layer as ascertained by lipid biomarker assemblages. Discernible trace fossil signals in some horizons suggest, however, that bioturbation and seafloor oxygenation occurred episodically throughout this succession and highlight that geochemical proxies often fail to capture these rapid and sporadic redox fluctuations in ancient black shales. The paleoenvironmental conditions, source biota, and accumulations of black shale are consistent with expressions of the Hangenberg Crisis globally, suggesting this event is likely captured within the uppermost strata of the Cleveland Shale in North America. © 2018 John Wiley & Sons Ltd
关键词	biomarker black shale chemostratigraphy Devonian marine environment microbial community paleoenvironment Paleozoic seafloor trace fossil water column Appalachian Basin Cleveland [Ohio]Ohio United States algae sea water aquatic species chemistry environment evolution fossil microflora Ohio sediment Aquatic Organisms Biological Evolution Environment Fossils Geologic Sediments Microbiota Ohio Seawater
语种	英语
来源机构	Geobiology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133256
推荐引用方式 GB/T 7714	Martinez A.M.,Boyer D.L.,Droser M.L.,et al. A stable and productive marine microbial community was sustained through the end-Devonian Hangenberg Crisis within the Cleveland Shale of the Appalachian Basin, United States[J]. Geobiology,2019,17(1).
APA	Martinez A.M.,Boyer D.L.,Droser M.L.,Barrie C.,&Love G.D..(2019).A stable and productive marine microbial community was sustained through the end-Devonian Hangenberg Crisis within the Cleveland Shale of the Appalachian Basin, United States.,17(1).
MLA	Martinez A.M.,et al."A stable and productive marine microbial community was sustained through the end-Devonian Hangenberg Crisis within the Cleveland Shale of the Appalachian Basin, United States".17.1(2019).