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Phanerozoic concentrations of atmospheric oxygen reconstructed from sedimentary charcoal

Abstract

Variations of the Earth’s atmospheric oxygen concentration (pO2) are thought to be closely tied to the evolution of life, with strong feedbacks between uni- and multicellular life and oxygen1,2. On the geologic timescale, pO2 is regulated by the burial of organic carbon and sulphur, as well as by weathering3. Reconstructions of atmospheric O2 for the past 400 million years have therefore been based on geochemical models of carbon and sulphur cycling4,5,6. However, these reconstructions vary widely4,5,6,7,8,9,10, particularly for the Mesozoic and early Cenozoic eras. Here we show that the abundance of charcoal in mire settings is controlled by pO2, and use this proxy to reconstruct the concentration of atmospheric oxygen for the past 400 million years. We estimate that pO2 was continuously above 26% during the Carboniferous and Permian periods, and that it declined abruptly around the time of the Permian–Triassic mass extinction. During the Triassic and Jurassic periods, pO2 fluctuated cyclically, with amplitudes up to 10% and a frequency of 20–30 million years. Atmospheric oxygen concentrations have declined steadily from the middle of the Cretaceous period to present-day values of about 21%. We conclude, however, that variation in pO2 was not the main driver of the loss of faunal diversity during the Permo–Triassic and Triassic–Jurassic mass extinction events.

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Figure 1: Phanerozoic inertinite distribution and predictions of pO2.

References

  1. Flück, M. et al. Coping with cyclic oxygen availability: Evolutionary aspects. Integr. Comp. Biol. 47, 324–331 (2007).

    Article  Google Scholar 

  2. Watson, A., Lovelock, J. E. & Margulis, L. Methanogenesis, fires and the regulation of atmospheric oxygen. Biosystems 10, 293–298 (1978).

    Article  Google Scholar 

  3. Kump, L. R. Terrestrial feedback in atmospheric oxygen regulation by fire and phosphorous. Nature 335, 152–154 (1988).

    Article  Google Scholar 

  4. Falkowski, P. G. et al. The rise of oxygen over the past 205 million years and the evolution of large placental mammals. Science 309, 2202–2204 (2005).

    Article  Google Scholar 

  5. Berner, R. A. GEOCARBSULF: A combined model for Phanerozoic atmospheric O2 and CO2 . Geochim. Cosmochim. 70, 5653–5664 (2006).

    Article  Google Scholar 

  6. Berner, R. A. Phanerozoic atmospheric oxygen: New results using the GEOCARBSULF model. Am. J. Sci. 309, 603–606 (2009).

    Article  Google Scholar 

  7. Berner, R. A. & Canfield, D. E. A new model for atmospheric oxygen over Phanerozoic time. Am. J. Sci. 289, 333–361 (1989).

    Article  Google Scholar 

  8. Hansen, K. W. & Wallmann, K. Cretaceous and Cenozoic evolution of seawater composition, atmospheric O2 and CO2: A model perspective. Am. J. Sci. 303, 94–148 (2003).

    Article  Google Scholar 

  9. Bergman, N. M., Lenton, T. M. & Watson, A. J. COPSE: A new model of biogeochemical cycling over Phanerozoic time. Am. J. Sci. 304, 397–437 (2004).

    Article  Google Scholar 

  10. Arvidson, R. S. & Mackenzie, F. T. MAGic: A Phanerozoic model for the geochemical cycling of major rock-forming components. Am. J. Sci. 306, 155–190 (2006).

    Article  Google Scholar 

  11. Jones, T. P. & Chaloner, W. G. Fossil charcoal, its recognition and paleoatmospheric significance. Palaeogeogr. Palaeoclimatol. Palaeoecol. 97, 39–50 (1991).

    Article  Google Scholar 

  12. Glasspool, I. J., Edwards, D. & Axe, L. Charcoal in the Silurian as evidence for the earliest wildfire. Geology 32, 381–383 (2004).

    Article  Google Scholar 

  13. Bowman, D. M. J. S. et al. Fire in the Earth system. Science 324, 481–484 (2009).

    Article  Google Scholar 

  14. Scott, A. C. The pre-quaternary history of fire. Palaeogeogr. Palaeoclimatol. Palaeoecol. 164, 281–329 (2000).

    Article  Google Scholar 

  15. Wildman, R. A. et al. Burning of forest materials under late Paleozoic high atmospheric oxygen levels. Geology 32, 457–460 (2004).

    Article  Google Scholar 

  16. Belcher, C. M. & McElwain, J. C. Limits for combustion in low O2 redefine paleoatmospheric predictions for the Mesozoic. Science 321, 1197–1200 (2008).

    Article  Google Scholar 

  17. Cope, M. J. & Chaloner, W. G. Fossil charcoal as evidence of past atmospheric composition. Nature 283, 647–649 (1980).

    Article  Google Scholar 

  18. Christian, H. J. et al. Global frequency and distribution of lightning as observed from space by the optical transient detector. J. Geophys. Res. 108, 4005 (2003).

    Article  Google Scholar 

  19. Scott, A. C. & Jones, T. P. Fossil charcoal: A plant-fossil record preserved by fire. Geol. Today 7, 214–216 (1991).

    Article  Google Scholar 

  20. Whelan, R. J. The Ecology of Fire (Cambridge Univ. Press, 1995).

    Google Scholar 

  21. Taylor, G. H. et al. Organic Petrology (Gebruder Borntraeger, 1998).

    Google Scholar 

  22. Scott, A. C. & Glasspool, I. J. Observations and experiments on the origin and formation of inertinite group macerals. Int. J. Coal Geol. 70, 53–66 (2007).

    Article  Google Scholar 

  23. Diessel, C. F. K. The stratigraphic distribution of inertinite. Int. J. Coal Geol. 81, 251–268 (2010).

    Article  Google Scholar 

  24. Robinson, J. M. Phanerozoic atmospheric reconstructions: A terrestrial perspective. Palaeogeogr. Palaeoclimatol. Palaeoecol. 97, 51–62 (1991).

    Article  Google Scholar 

  25. Lenton, T. M. & Watson, A. J. Redfield revisited: 2. What regulates the oxygen content of the atmosphere. Glob. Biogeochem. Cycles 14, 249–268 (2000).

    Article  Google Scholar 

  26. Beerling, D. J. et al. Carbon isotope evidence implying high O2/CO2 ratios in the Permo-Carboniferous atmosphere. Geochim. Cosmochim. Acta 66, 3757–3767 (2002).

    Article  Google Scholar 

  27. Robinson, J. M. Phanerozoic O2 variation, fire, and terrestrial ecology. Palaeogeogr. Palaeoclimatol. Palaeoecol. 75, 223–240 (1989).

    Article  Google Scholar 

  28. Retallack, G. J. et al. Middle-Late Permian mass extinction on land. Geol. Soc. Am. Bull. 118, 1398–1411 (2006).

    Article  Google Scholar 

  29. Isozaki, Y. Permo–Triassic boundary superanoxia and stratified superocean: Records from lost deep sea. Science 276, 235–238 (1997).

    Article  Google Scholar 

  30. Bond, W. J. The tortoise and the hare: Ecology of angiosperm dominance and gymnosperm persistence. Biol. J. Linn. Soc. 36, 227–249 (1989).

    Article  Google Scholar 

Download references

Acknowledgements

We thank the Grainger Fund at FMNH for financial support, and acknowledge R. A. Berner, W. G. Chaloner and A. J. Watson for helpful discussions. The work of A.C.S. is financially supported by private charitable donations.

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I.J.G. and A.C.S. designed the research. I.J.G. gathered, compiled and interpreted data and A.C.S. contributed data. I.J.G. wrote the paper with additions by A.C.S.

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Correspondence to Ian J. Glasspool.

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The authors declare no competing financial interests.

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Glasspool, I., Scott, A. Phanerozoic concentrations of atmospheric oxygen reconstructed from sedimentary charcoal. Nature Geosci 3, 627–630 (2010). https://doi.org/10.1038/ngeo923

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