Knowledge Management System Of Guangzhou Institute of Geochemistry，CAS
Wang, Wen-qian1,2; Zhang, Feifei1,2; Zhang, Shuang2,3; Cui, Ying4; Zheng, Quan-feng5; Zhang, Yi-chun5; Zhang, Hua5; Xu, Yi-gang7,8 ; Yuan, Dong-xun6; Shen, Shu-zhong1
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| Ecosystem responses of two Permian biocrises modulated by CO2 emission rates | |
| Source Publication | EARTH AND PLANETARY SCIENCE LETTERS
 |
| ISSN | 0012-821X |
| 2023-01-15 | |
| Volume | 602Pages:12 |
| DOI | 10.1016/j.epsl.2022.117940 |
| Language | 英语 |
| WOS Research Area | Geochemistry & Geophysics |
| Abstract | Carbon dioxide (CO2) emissions and associated climate change are thought to have caused a number of widespread marine anoxia and mass extinction events in the geologic past. However, how marine ecosystems respond to different CO2 emission patterns remains an important unresolved question. The geologic records of the Permian Period, which witnessed two mass extinctions associated with volcanic eruption (thus CO2 emissions) but with vastly different biological responses, provide a unique window to address this issue. Here, we present a long-term uranium isotope (8238U) record using marine limestones covering the latest Early Permian through Middle to Late Permian. The 8238U values show two episodes of low values in the middle Capitanian and late Changhsingian, indicating two periods of expansion of marine anoxia during the Permian Period. We use a uranium isotope mass balance model to quantify the anoxic seafloor areas, and we further use a carbon cycle model (LOSCAR, Long-term Ocean Sediment Carbon Reservoir) based on observed 813C of marine carbonates, sea surface temperature records, and ocean surface pH data to quantify the carbon emission rates across the two biocrises. The uranium isotope mass balance model reveals that the anoxic seafloor area is three times larger during the end-Permian mass extinction (EPME, covering -35% of the seafloor areas) than that during the end-Guadalupian event (EGE, covering -10% of the seafloor areas). The CO2 emission rates across the two biocrises modeled from the LOSCAR model show that the carbon emission rate across the EPME was at least five times faster than that during the EGE, with the best-fit 813C values of the input sources ranging from -8 to -12%o, indicating a predominant volcanic CO2 source during the EPME, and close to -25%o during the EGE. Comparing model results and observed proxy data led to the suggestion that the more severe ecosystem responses during the EPME, including higher extinction rate and larger extent of seafloor anoxia, are closely linked to the faster carbon emission rates compared to the EGE.(c) 2022 Elsevier B.V. All rights reserved. |
| Keyword | Guadalupian-Lopingian biocrisis end -Permian mass extinction uranium isotopes marine anoxia carbon emission rate hyperthermal events |
| WOS ID | WOS:000904613800001 |
| Indexed By | SCI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.gig.ac.cn/handle/344008/72401 |
| Collection | 同位素地球化学国家重点实验室 |
| Corresponding Author | Zhang, Feifei; Zhang, Shuang; Cui, Ying; Shen, Shu-zhong |
| Affiliation | 1.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, 163 Xianlin Ave, Nanjing 210023, Peoples R China 2.Nanjing Univ, Frontiers Sci Ctr Crit Earth Mat Cycling, 163 Xianlin Ave, Nanjing 210023, Peoples R China 3.Texas A&M Univ, Dept Oceanog, College Stn, TX 77843 USA 4.Montclair State Univ, Dept Earth Environm Studies, 1 Normal Ave, Montclair, NJ 07470 USA 5.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Ctr Excellence Life & Paleoenvironment, State Key Lab Palaeobiol & Stratig, 39 East Beijing Rd, Nanjing 210008, Peoples R China 6.China Univ Min & Technol, Sch Resources & Geosci, 1 Daxue Rd, Xuzhou 221116, Peoples R China 7.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 8.Guangzhou Inst Geochem, Chinese Acad Sci, Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China |
| Recommended Citation GB/T 7714 | Wang, Wen-qian,Zhang, Feifei,Zhang, Shuang,et al. Ecosystem responses of two Permian biocrises modulated by CO2 emission rates[J]. EARTH AND PLANETARY SCIENCE LETTERS,2023,602:12. |
| APA | Wang, Wen-qian.,Zhang, Feifei.,Zhang, Shuang.,Cui, Ying.,Zheng, Quan-feng.,...&Shen, Shu-zhong.(2023).Ecosystem responses of two Permian biocrises modulated by CO2 emission rates.EARTH AND PLANETARY SCIENCE LETTERS,602,12. |
| MLA | Wang, Wen-qian,et al."Ecosystem responses of two Permian biocrises modulated by CO2 emission rates".EARTH AND PLANETARY SCIENCE LETTERS 602(2023):12. |
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