气候变化领域集成服务门户(CCPortal): Recovery of benthic communities following the Toarcian oceanic anoxic event in the Cleveland Basin; UK

CCPortal

DOI	10.1016/j.palaeo.2019.02.014
	Recovery of benthic communities following the Toarcian oceanic anoxic event in the Cleveland Basin; UK
	Caswell B.A.; Dawn S.J.
发表日期	2019
ISSN	0031-0182
起始页码	114
结束页码	126
卷号	521
英文摘要	During the Toarcian oceanic anoxic event (OAE) considerable environmental changes occurred that were associated with global warming, perturbations to the C-cycle and ocean deoxygenation which resulted in a mass extinction of marine fauna. Recovery of the biota after the event was protracted and has to date undergone limited study. However, understanding the patterns and processes of recovery are critical to anticipating ecosystem responses to the environmental changes predicted for the near future. Results showed that increases in benthic diversity, and the re-establishment of the Toarcian infauna was gradual and followed the changing redox conditions. Pioneering infauna, such as Dacryomya ovum that dominated the seafloor after the event in the Cleveland Basin, Yorkshire, UK, can modify the physico-chemical environment and thus facilitate ecological succession after disturbance. The length of D. ovum increased >8 mm throughout the bifrons Zone and these body-size changes were linked with total organic carbon (TOC) content suggesting a link to primary productivity, although only at intermediate levels of deoxygenation. Major changes in the phytoplankton, and so food supply, seem to have driven changes in bivalve body size, across trophic guilds, both during and after the event in Yorkshire, and on the mid to lower shelf in Spain and France, respectively. Primary productivity collapse seems then to have been a major driver of biotic change throughout the Toarcian event, as it was during the Permian–Triassic, Triassic/Jurassic and Cretaceous/Tertiary mass extinctions. Further investigation of both the palaeontological and geochemical changes that occurred within early successional Toarcian infaunal communities are required to more fully understand the pattern of recovery after the OAE. © 2019 Elsevier B.V.
英文关键词	Alum Shale Member; Dysoxia; Jurassic; Lilliput effect; Population structure; Shell morphology
语种	英语
scopus关键词	anoxic conditions; benthos; bivalve; Cretaceous-Paleogene boundary; disturbance; ecosystem response; environmental change; Jurassic; mass extinction; morphology; organic carbon; Permian-Triassic boundary; population structure; primary production; redox conditions; seafloor; shell; Toarcian; total organic carbon; Cleveland Basin; England; North Yorkshire; Spain; United Kingdom; Bivalvia
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/151007
作者单位	Environmental Futures Research Institute, Griffith University, Gold Coast Campus, Parklands DriveQueensland 4222, Australia; Department of Geography, Geology and Environment, University of Hull, Hull, HU6 7RX, United Kingdom; School of Environmental Sciences, University of Liverpool, Brownlow Hill, Liverpool, L69 3GP, United Kingdom
推荐引用方式 GB/T 7714	Caswell B.A.,Dawn S.J.. Recovery of benthic communities following the Toarcian oceanic anoxic event in the Cleveland Basin; UK[J],2019,521.
APA	Caswell B.A.,&Dawn S.J..(2019).Recovery of benthic communities following the Toarcian oceanic anoxic event in the Cleveland Basin; UK.Palaeogeography, Palaeoclimatology, Palaeoecology,521.
MLA	Caswell B.A.,et al."Recovery of benthic communities following the Toarcian oceanic anoxic event in the Cleveland Basin; UK".Palaeogeography, Palaeoclimatology, Palaeoecology 521(2019).