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DOI | 10.1038/s41561-017-0006-3 |
Oxygenation as a driver of the Great Ordovician Biodiversification Event | |
Edwards, Cole T.1; Saltzman, Matthew R.2; Royer, Dana L.3; Fike, David A.4 | |
2017-12-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The largest radiation of Phanerozoic marine animal life quadrupled genus-level diversity towards the end of the Ordovician Period about 450 million years ago. A leading hypothesis for this Great Ordovician Biodiversification Event is that cooling of the Ordovician climate lowered sea surface temperatures into the thermal tolerance window of many animal groups, such as corals. A complementary role for oxygenation of subsurface environments has been inferred based on the increasing abundance of skeletal carbonate, but direct constraints on atmospheric O-2 levels remain elusive. Here, we use high-resolution paired bulk carbonate and organic carbon isotope records to determine the changes in isotopic fractionation between these phases throughout the Ordovician radiation. These results can be used to reconstruct atmospheric O-2 levels based on the O-2-dependent fractionation of carbon isotopes by photosynthesis. We find a strong temporal link between the Great Ordovician Biodiversification Event and rising O-2 concentrations, a pattern that is corroborated by O-2 models that use traditional carbon-sulfur mass balance. We conclude that that oxygen levels probably played an important role in regulating early Palaeozoic biodiversity levels, even after the Cambrian Explosion. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000416858000014 |
WOS关键词 | ATMOSPHERIC OXYGEN ; ORGANIC-MATTER ; NORTH-AMERICA ; LATE MIDDLE ; CARBON ; FRACTIONATION ; GEOCARBSULF ; RECORD ; MODEL ; O-2 |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/34783 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Appalachian State Univ, Dept Geol & Environm Sci, Boone, NC 28608 USA; 2.Ohio State Univ, Sch Earth Sci, Columbus, OH 43210 USA; 3.Wesleyan Univ, Dept Earth & Environm Sci, Middletown, CT USA; 4.Washington Univ, Dept Earth & Planetary Sci, St Louis, MO 63130 USA |
推荐引用方式 GB/T 7714 | Edwards, Cole T.,Saltzman, Matthew R.,Royer, Dana L.,et al. Oxygenation as a driver of the Great Ordovician Biodiversification Event[J]. NATURE GEOSCIENCE,2017,10(12). |
APA | Edwards, Cole T.,Saltzman, Matthew R.,Royer, Dana L.,&Fike, David A..(2017).Oxygenation as a driver of the Great Ordovician Biodiversification Event.NATURE GEOSCIENCE,10(12). |
MLA | Edwards, Cole T.,et al."Oxygenation as a driver of the Great Ordovician Biodiversification Event".NATURE GEOSCIENCE 10.12(2017). |
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