DOI: 10.1016/j.palaeo.2015.09.004
论文题名: Environmental controls on the post-Permian recovery of benthic, tropical marine ecosystems in western Palaeotethys (Aggtelek Karst, Hungary)
作者: Foster W.J. ; Danise S. ; Sedlacek A. ; Price G.D. ; Hips K. ; Twitchett R.J.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2015
卷: 440 起始页码: 374
结束页码: 394
语种: 英语
英文关键词: Anoxia
; Benthic recovery
; Early triassic
; Eutrophication
; Marine invertebrates
; Mass extinction
英文摘要: Climate warming during the late Permian is associated with the most severe mass extinction event of the Phanerozoic, and the expansion of hypoxic and anoxic conditions in shallow shelf settings. It has been hypothesised that wave aeration provided a 'habitable zone' in the shallowest environments that allowed the survival and rapid recovery of benthic invertebrates during the Early Triassic. We test this hypothesis by studying the rock and fossil records of the Aggtelek Karst, Hungary. Nearshore settings recorded in the Bódvaszilas Sandstone Formation and units A and D of the Szin Marl Formation are characterised by taxonomically homogenous fossil assemblages of low diversity and low evenness. Ecological and taxonomic recovery in this environmental setting was hampered by persistent environmental stress. This stress is attributed to increased runoff related to climate warming during the Early Triassic that resulted in large salinity fluctuations, increased sedimentation rates and eutrophication that led to seasonal hypoxia and an environment only favourable for opportunistic taxa. In contrast, shoal and mid-ramp settings further offshore are characterised by high diversity faunas with a greater functional complexity. Prior to the late Spathian Tirolites carniolicus Zone, the shelly fossils and trace fossils are limited to settings aerated by wave activity, which supports the habitable zone hypothesis. In the Tirolites carniolicus Zone, however, the oxygen minimum zone retreats offshore and the habitable deeper shelf settings are rapidly colonised by shallow water taxa, evidenced by the highest levels of diversity and bioturbation recorded in the study. Locally, full recovery of marine ecosystems is not recorded until the Illyrian, with the establishment of a sponge reef complex. © 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68750
Appears in Collections: 过去全球变化的重建
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作者单位: Plymouth University, School of Geography, Earth and Environmental Sciences, Drake Circus, Plymouth, Devon, United Kingdom; Natural History Museum, Department of Earth Sciences, Cromwell Road, London, United Kingdom; Department of Geology, University of Georgia, Athens, GA, United States; Department of Earth Science, University of Northern Iowa, Cedar Falls, IA, United States; MTA-ELTE Geological, Geophysical and Space Science Research Group, Pázmány s. 1/c, Budapest, Hungary
Recommended Citation:
Foster W.J.,Danise S.,Sedlacek A.,et al. Environmental controls on the post-Permian recovery of benthic, tropical marine ecosystems in western Palaeotethys (Aggtelek Karst, Hungary)[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2015-01-01,440