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Multiple episodes of extensive marine anoxia linked to global warming and continental weathering following the latest Permian mass extinction.
Sci Adv. 2018 04; 4(4):e1602921.SA

Abstract

Explaining the ~5-million-year delay in marine biotic recovery following the latest Permian mass extinction, the largest biotic crisis of the Phanerozoic, is a fundamental challenge for both geological and biological sciences. Ocean redox perturbations may have played a critical role in this delayed recovery. However, the lack of quantitative constraints on the details of Early Triassic oceanic anoxia (for example, time, duration, and extent) leaves the links between oceanic conditions and the delayed biotic recovery ambiguous. We report high-resolution U-isotope (δ238U) data from carbonates of the uppermost Permian to lowermost Middle Triassic Zal section (Iran) to characterize the timing and global extent of ocean redox variation during the Early Triassic. Our δ238U record reveals multiple negative shifts during the Early Triassic. Isotope mass-balance modeling suggests that the global area of anoxic seafloor expanded substantially in the Early Triassic, peaking during the latest Permian to mid-Griesbachian, the late Griesbachian to mid-Dienerian, the Smithian-Spathian transition, and the Early/Middle Triassic transition. Comparisons of the U-, C-, and Sr-isotope records with a modeled seawater PO43- concentration curve for the Early Triassic suggest that elevated marine productivity and enhanced oceanic stratification were likely the immediate causes of expanded oceanic anoxia. The patterns of redox variation documented by the U-isotope record show a good first-order correspondence to peaks in ammonoid extinctions during the Early Triassic. Our results indicate that multiple oscillations in oceanic anoxia modulated the recovery of marine ecosystems following the latest Permian mass extinction.

Authors+Show Affiliations

School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287-6004, USA.School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287-6004, USA.Department of Geology, University of Cincinnati, Cincinnati, OH 45221-0013, USA. State Key Laboratories of Biogeology and Environmental Geology and Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China.Deparment of Earth Sciences, University of California, Riverside, Riverside, CA 92521, USA.Department of Earth and Planetary Sciences, University of California, Santa Cruz, Santa Cruz, CA 95064, USA.Institute of Earth Sciences, NAWI Graz, University of Graz, Heinrichstraβe 26, 8010 Graz, Austria. Department of Geology, Lund University, Sölvegatan 12, 22362 Lund, Sweden.Department of Geology and Geophysics, Louisiana State University, Baton Rouge, LA 70803, USA.School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287-6004, USA.Institute of Earth Sciences, NAWI Graz, University of Graz, Heinrichstraβe 26, 8010 Graz, Austria. Lehr- und Forschungszentrum Francisco-Josephinum, 3250 Wieselburg, Austria. Department of Lithospheric Research, Vienna University, Althanstr. 14, 1090 Vienna, Austria.School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287-6004, USA. School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287, USA.

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

29651454

Citation

Zhang, Feifei, et al. "Multiple Episodes of Extensive Marine Anoxia Linked to Global Warming and Continental Weathering Following the Latest Permian Mass Extinction." Science Advances, vol. 4, no. 4, 2018, pp. e1602921.
Zhang F, Romaniello SJ, Algeo TJ, et al. Multiple episodes of extensive marine anoxia linked to global warming and continental weathering following the latest Permian mass extinction. Sci Adv. 2018;4(4):e1602921.
Zhang, F., Romaniello, S. J., Algeo, T. J., Lau, K. V., Clapham, M. E., Richoz, S., Herrmann, A. D., Smith, H., Horacek, M., & Anbar, A. D. (2018). Multiple episodes of extensive marine anoxia linked to global warming and continental weathering following the latest Permian mass extinction. Science Advances, 4(4), e1602921. https://doi.org/10.1126/sciadv.1602921
Zhang F, et al. Multiple Episodes of Extensive Marine Anoxia Linked to Global Warming and Continental Weathering Following the Latest Permian Mass Extinction. Sci Adv. 2018;4(4):e1602921. PubMed PMID: 29651454.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Multiple episodes of extensive marine anoxia linked to global warming and continental weathering following the latest Permian mass extinction. AU - Zhang,Feifei, AU - Romaniello,Stephen J, AU - Algeo,Thomas J, AU - Lau,Kimberly V, AU - Clapham,Matthew E, AU - Richoz,Sylvain, AU - Herrmann,Achim D, AU - Smith,Harrison, AU - Horacek,Micha, AU - Anbar,Ariel D, Y1 - 2018/04/11/ PY - 2016/11/22/received PY - 2018/02/26/accepted PY - 2018/4/14/entrez PY - 2018/4/14/pubmed PY - 2018/4/14/medline SP - e1602921 EP - e1602921 JF - Science advances JO - Sci Adv VL - 4 IS - 4 N2 - Explaining the ~5-million-year delay in marine biotic recovery following the latest Permian mass extinction, the largest biotic crisis of the Phanerozoic, is a fundamental challenge for both geological and biological sciences. Ocean redox perturbations may have played a critical role in this delayed recovery. However, the lack of quantitative constraints on the details of Early Triassic oceanic anoxia (for example, time, duration, and extent) leaves the links between oceanic conditions and the delayed biotic recovery ambiguous. We report high-resolution U-isotope (δ238U) data from carbonates of the uppermost Permian to lowermost Middle Triassic Zal section (Iran) to characterize the timing and global extent of ocean redox variation during the Early Triassic. Our δ238U record reveals multiple negative shifts during the Early Triassic. Isotope mass-balance modeling suggests that the global area of anoxic seafloor expanded substantially in the Early Triassic, peaking during the latest Permian to mid-Griesbachian, the late Griesbachian to mid-Dienerian, the Smithian-Spathian transition, and the Early/Middle Triassic transition. Comparisons of the U-, C-, and Sr-isotope records with a modeled seawater PO43- concentration curve for the Early Triassic suggest that elevated marine productivity and enhanced oceanic stratification were likely the immediate causes of expanded oceanic anoxia. The patterns of redox variation documented by the U-isotope record show a good first-order correspondence to peaks in ammonoid extinctions during the Early Triassic. Our results indicate that multiple oscillations in oceanic anoxia modulated the recovery of marine ecosystems following the latest Permian mass extinction. SN - 2375-2548 UR - https://www.unboundmedicine.com/medline/citation/29651454/Multiple_episodes_of_extensive_marine_anoxia_linked_to_global_warming_and_continental_weathering_following_the_latest_Permian_mass_extinction_ L2 - https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/29651454/ DB - PRIME DP - Unbound Medicine ER -
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