气候变化领域集成服务门户(CCPortal): Stratigraphic and environmental control on marine benthic community change through the early Toarcian extinction event (Iberian Range; Spain)

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DOI	10.1016/j.palaeo.2019.03.039
	Stratigraphic and environmental control on marine benthic community change through the early Toarcian extinction event (Iberian Range; Spain)
	Danise S.; Clémence M.-E.; Price G.D.; Murphy D.P.; Gómez J.J.; Twitchett R.J.
发表日期	2019
ISSN	0031-0182
起始页码	183
结束页码	200
卷号	524
英文摘要	In the Early Jurassic (~183 Ma ago) global warming and associated environmental changes coincided with an extinction event in the marine realm (early Toarcian extinction event). Anoxia was previously considered to have been the main cause of extinction, but extinctions also occur at localities that remained oxygenated throughout the event, suggesting that other factors, such as temperature, may have played a major role. To test this hypothesis, we integrated quantitative analyses of benthic macro-invertebrates with high-resolution geochemical proxies on the bulk rock (TOC, δ 13 C, δ 18 O) and on belemnites and brachiopod shells (δ 13 C, δ 18 O) from two sections from the Iberian Range, Spain, with no black shale deposition. The sections are orientated SE-NW along an onshore-offshore gradient deepening to the north. The dominant benthic groups, bivalves and brachiopods, show a different response to the extinction: brachiopods go through a complete species-level turnover, while many bivalve species range through the event. In the shallower section, changes in richness and evenness correlate with TOC (Total Organic Carbon), suggesting that variations in nutrient input from runoff, and the possible local onset of low-redox conditions (TOC > 4 wt%), controlled faunal diversity. In contrast, at the deeper section, community change correlates with changes in δ 18 O, indicating that temperature variations might have influenced faunal change. Different stratigraphic patterns of extinction occur between the two localities, with last-occurrences clustering at the maximum flooding surface in the shallower section, and at the transgressive surface in the deeper one. The observed differences between the two localities highlight the important role of local sedimentary and stratigraphic processes in controlling the shape of the geochemical and fossil record, and the need for studying multiple sections along onshore-offshore gradients in order to extrapolate regional and global patterns. © 2019 Elsevier B.V.
英文关键词	Anoxia; Bivalves; Brachiopods; Jurassic; Stable isotopes; Warming
语种	英语
scopus关键词	anoxia; benthos; bivalve; black shale; brachiopod; extinction; flooding; fossil record; global warming; Jurassic; macroinvertebrate; marine environment; shell; stable isotope; stratigraphy; Toarcian; type locality; Iberian Cordillera; Spain; Bivalvia; Brachiopoda; Invertebrata
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/150968
作者单位	Università degli Studi di Firenze, Dipartimento di Sicenze della Terra, via La Pira 4, Firenze, 50121, Italy; School of Geography, Earth and Environmental Sciences, University of Plymouth, Drake Circus, Plymouth, Devon PL4 8AA, United Kingdom; Eastfield College, Dallas County Community College District, 3737 Motley Drive, Mesquite, TX 75150, United States; Departamento de Geodinámica, Estratigrafía y Paleontología, Facultad de Ciencias Geológicas (UCM), Instituto de Geociencias (CSIC-UCM), c/ Jose Antonio Novais, 12, Madrid, 28040, Spain; Department of Earth Sciences, Natural History Museum, Cromwell Road, London, SW7 5BD, United Kingdom
推荐引用方式 GB/T 7714	Danise S.,Clémence M.-E.,Price G.D.,et al. Stratigraphic and environmental control on marine benthic community change through the early Toarcian extinction event (Iberian Range; Spain)[J],2019,524.
APA	Danise S.,Clémence M.-E.,Price G.D.,Murphy D.P.,Gómez J.J.,&Twitchett R.J..(2019).Stratigraphic and environmental control on marine benthic community change through the early Toarcian extinction event (Iberian Range; Spain).Palaeogeography, Palaeoclimatology, Palaeoecology,524.
MLA	Danise S.,et al."Stratigraphic and environmental control on marine benthic community change through the early Toarcian extinction event (Iberian Range; Spain)".Palaeogeography, Palaeoclimatology, Palaeoecology 524(2019).