气候变化领域集成服务门户(CCPortal): Ichnological analysis as a tool for assessing deep-sea circulation in the westernmost Mediterranean over the last Glacial Cycle

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DOI	10.1016/j.palaeo.2020.110082
	Ichnological analysis as a tool for assessing deep-sea circulation in the westernmost Mediterranean over the last Glacial Cycle
	Casanova-Arenillas S.; Rodríguez-Tovar F.J.; Martínez-Ruiz F.
发表日期	2020
ISSN	0031-0182
英文摘要	During the Last Glacial Cycle (last ~130 kyr) climatically induced changes in the ocean dynamics affected the tracemaker habitat in the Alboran Sea Basin (westernmost Mediterranean), as observed in sediment records from ODP Leg 161 Sites 976 and 977. The trace fossil assemblage present is assigned to the Zoophycos ichnofacies and is of low/moderate diversity and comprises common Planolites, Chondrites and Thalassinoides, with occasional Scolicia and Zoophycos. Ichnodiversity, size of biogenic structures and percentage of bioturbational sedimentary structures clearly correlate. Fluctuations in ichnological features evidence a well-developed short-term cyclic pattern that could be related to environmental changes such as export production and oxygenation at the seafloor. The percentage of bioturbational sedimentary structures correlates well with sea-surface temperature (SST) records obtained for the Alboran Sea and Gulf of Lions, as well as with the δ18O profiles of Greenland ice cores. Correlation is seen for both the long-term (over the Last Glacial Cycle) and short-term changes, the latter comprising climate oscillations such as Heinrich Events, Younger Dryas, and periods of organic-rich layer deposition. Ichnological data also allow for a reconstruction of climatically induced changes in the ocean dynamics, which have a major incidence in the Western Mediterranean Deep Water that, in turn, affects deep-sea environmental conditions. © 2020 Elsevier B.V.
英文关键词	Alboran Sea; Ocean dynamics; Oxygenation; Palaeoclimate; Pleistocene; Trace fossils
语种	英语
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/150713
作者单位	Departamento de Estratigrafía y Palaeontología, Universidad de Granada, Campus Fuentenueva s/n, 18002, Granada, Spain; Instituto Andaluz de Ciencias de la Tierra, Consejo Superior de Investigaciones Científicas-Universidad de Granada (CSIC-UGR), Avda. de las Palmeras 4, Armilla, Granada, 18100, Spain
推荐引用方式 GB/T 7714	Casanova-Arenillas S.,Rodríguez-Tovar F.J.,Martínez-Ruiz F.. Ichnological analysis as a tool for assessing deep-sea circulation in the westernmost Mediterranean over the last Glacial Cycle[J],2020.
APA	Casanova-Arenillas S.,Rodríguez-Tovar F.J.,&Martínez-Ruiz F..(2020).Ichnological analysis as a tool for assessing deep-sea circulation in the westernmost Mediterranean over the last Glacial Cycle.Palaeogeography, Palaeoclimatology, Palaeoecology.
MLA	Casanova-Arenillas S.,et al."Ichnological analysis as a tool for assessing deep-sea circulation in the westernmost Mediterranean over the last Glacial Cycle".Palaeogeography, Palaeoclimatology, Palaeoecology (2020).