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DOI	10.1016/j.palaeo.2020.109975
	Is there a reliable taphonomic clock in the temperate North Atlantic? An example from a North Sea population of the mollusc Arctica islandica
	Butler P.G.; Fraser N.M.; Scourse J.D.; Richardson C.A.; Bryant C.; Heinemeier J.
发表日期	2020
ISSN	0031-0182
卷号	560
英文摘要	Two hundred and seventy-seven shells of the long-lived bivalve mollusc Arctica islandica, collected from the Fladen Ground, northern North Sea, were radiocarbon dated and their taphonomic condition assessed, in order to determine whether taphonomic condition might provide a reliable indication of time since the death of the animal. With nine stations from across the Fladen Ground sampled, some strong geographic biases in 14C ages were apparent, with living and modern (post-bomb pulse) material found in the northern part of the Fladen Ground while older material (first half of the last millennium and Early Holocene/Lateglacial) was concentrated in the central and western sites. Samples from the south and east Fladen Ground were sparse and were dominated by material from the second half of the last millennium. This south-north distribution is interpreted as the result of environmental change over millennial time-scales in the North Sea causing a gradual northward shift of living A. islandica populations and is not thought to be related to post mortem transport of shells to the south and east. Taphonomic condition, assessed using discriminant analysis and principal component analysis of five characteristics (amount of remaining periostracum, presence and condition of the ligament, extent of erosion at the shell margin, amount of bioerosion, and nacre condition), appeared to be a generally unreliable indicator of time since the death of the animal. Based on these five taphonomic characteristics, discriminant analysis placed 81.1% of post-bomb shells, 39.6% of shells from the period 0–500 yr BP, 68.0% of shells from the period 500–1000 yr BP and 20.0% of shells from the Early Holocene/Lateglacial group into the correct radiocarbon age grouping, providing no support for the idea that this method can be used to triage shells for chronology construction as an alternative to radiometric dating. © 2020 The Authors
英文关键词	Fladen Ground; Radiocarbon; Sclerochronology
语种	英语
scopus关键词	bivalve; chronology; dating method; environmental change; Holocene; late glacial; taphonomy; temperate environment; Atlantic Ocean; Atlantic Ocean (North); Fladen Ground; North Sea; Animalia; Arctica islandica; Bivalvia; Mollusca
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/150314
作者单位	Centre for Geography and Environmental Sciences, College of Life and Environmental Sciences, University of Exeter, Penryn, Cornwall TR10 9EZ, United Kingdom; École Internationale de Genève - La Châtagneraie Chemin de la Ferme 2, Founex, 1297, Switzerland; School of Ocean Sciences, College of Environmental Sciences and Engineering, Bangor University, Menai Bridge, Anglesey, LL59 5AB, United Kingdom; NERC Radiocarbon Facility, Scottish Universities Environmental Research Centre, University of Glasgow, Rankine Avenue, G75 OQF, East Kilbride, Scotland, United Kingdom; Department of Physics and Astronomy, University of Aarhus, Ny Munkegade 120, Building 1525, Aarhus C, DK-8000, Denmark
推荐引用方式 GB/T 7714	Butler P.G.,Fraser N.M.,Scourse J.D.,et al. Is there a reliable taphonomic clock in the temperate North Atlantic? An example from a North Sea population of the mollusc Arctica islandica[J],2020,560.
APA	Butler P.G.,Fraser N.M.,Scourse J.D.,Richardson C.A.,Bryant C.,&Heinemeier J..(2020).Is there a reliable taphonomic clock in the temperate North Atlantic? An example from a North Sea population of the mollusc Arctica islandica.Palaeogeography, Palaeoclimatology, Palaeoecology,560.
MLA	Butler P.G.,et al."Is there a reliable taphonomic clock in the temperate North Atlantic? An example from a North Sea population of the mollusc Arctica islandica".Palaeogeography, Palaeoclimatology, Palaeoecology 560(2020).