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The End-Permian Crisis, Aftermath and Subsequent Recovery
| Title: | The End-Permian Crisis, Aftermath and Subsequent Recovery |
| Authors: | Wignall, Paul B. Browse this author |
| Keywords: | Mass Extinction | | End-Permian | | Smithian | | Carbon isotopes |
| Issue Date: | 2008 |
| Publisher: | 21st Century COE for Neo-Science of Natural History, Hokkaido University |
| Citation: | Edited by Hisatake Okada, Shunsuke F. Mawatari, Noriyuki Suzuki, Pitambar Gautam. ISBN: 978-4-9903990-0-9 |
| Journal Title: | Origin and Evolution of Natural Diversity : Proceedings of the International Symposium, The Origin and Evolution of Natural Diversity, held from 1-5 October 2007 in Sapporo, Japan |
| Start Page: | 43 |
| End Page: | 48 |
| Abstract: | Improvements in biostratigraphic and radiometric dating, combined with palynological and palaeoecological studies of the same sections, have allowed the relative timing of ecosystem destruction during the end-Permian crisis to be determined in the past few years. The extinction is revealed to be neither synchronous nor instantaneous but instead reveals a protracted crisis. This is especially the case for terrestrial floral communities that show the onset of floral changes prior to the marine mass extinction, but a final extinction after the marine event making a total duration for the terrestrial extinctions of a few hundred thousand years. In the oceans the radiolarians provide the only detailed record of the fate of planktonic communities and these undergo a phase of stress and final extinction before the marine benthos. The initial phase of the aftermath is characterized by a globally-distributed, low diversity biota and, in shallow, equatorial settings, by the precipitation of Precambrian-like anachronistic carbonates. These are well developed during low points in the δ13C record and may be related to super-saturated anoxic waters. Few groups radiate in the Early Triassic and those that did suffered a second mass extinction event late in the Smithian Stage, around 2 million years after the end-Permian event. Only during the ensuing Spathian are there clear signs of uninterrupted recovery. |
| Description: | International Symposium, "The Origin and Evolution of Natural Diversity". 1–5 October 2007. Sapporo, Japan. |
| Conference Name: | International Symposium, "The Origin and Evolution of Natural Diversity" |
| Conference Place: | Sapporo |
| Type: | proceedings |
| URI: | http://hdl.handle.net/2115/38434 |
| Appears in Collections: | Origin and Evolution of Natural Diversity > Proceedings
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