Cited by 437Paleontology and Stratigraphy of FossilsFire effects on ecosystemsCoal and Its By-products

The diversification of Paleozoic fire systems and fluctuations in atmospheric oxygen concentration

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Scott, Andrew C., Glasspool, Ian J.·2006·Proceedings of the National Academy of Sciences

Abstract

By comparing Silurian through end Permian [approximately 250 million years (Myr)] charcoal abundance with contemporaneous macroecological changes in vegetation and climate we aim to demonstrate that long-term variations in fire occurrence and fire system diversification are related to fluctuations in Late Paleozoic atmospheric oxygen concentration. Charcoal, a proxy for fire, occurs in the fossil record from the Late Silurian (approximately 420 Myr) to the present. Its presence at any interval in the fossil record is already taken to constrain atmospheric oxygen within the range of 13% to 35% (the "fire window"). Herein, we observe that, as predicted, atmospheric oxygen levels rise from approximately 13% in the Late Devonian to approximately 30% in the Late Permian so, too, fires progressively occur in an increasing diversity of ecosystems. Sequentially, data of note include: the occurrence of charcoal in the Late Silurian/Early Devonian, indicating the burning of a diminutive, dominantly rhyniophytoid vegetation; an apparent paucity of charcoal in the Middle to Late Devonian that coincides with a predicted atmospheric oxygen low; and the subsequent diversification of fire systems throughout the remainder of the Late Paleozoic. First, fires become widespread during the Early Mississippian, they then become commonplace in mire systems in the Middle Mississippian; in the Pennsylvanian they are first recorded in upland settings and finally, based on coal petrology, become extremely important in many Permian mire settings. These trends conform well to changes in atmospheric oxygen concentration, as predicted by modeling, and indicate oxygen levels are a significant control on long-term fire occurrence.

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Crossref · 10.1073/pnas.0604090103

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  • Oxygen levels were sufficient to oxygenate some deep ocean basins and deposit gypsum during the Lomagundi carbon isotope excursion ∼2.22-2.06 Ga.

    “Oxygen levels were sufficient to oxygenate some deep ocean basins23 and deposit gypsum45 during the ‘Lomagundi' carbon isotope excursion234567 ∼2.22–2.06 Ga.”
  • Atmospheric oxygen eventually approached modern levels during ∼0.6-0.4 Ga, with the first compelling evidence for pO2≥0.6 PAL from the appearance of Palaeozoic fossil charcoal at ∼0.4 Ga.

    “Atmospheric oxygen eventually approached modern levels611 during ∼0.6–0.4 Ga, with the first compelling evidence for pO2≥0.6 PAL from the appearance of Palaeozoic fossil charcoal23 at ∼0.4 Ga.”
  • The first appearance of fossil charcoal in the Late Silurian and its ongoing occurrence through the Devonian indicates O2 >15-17% (vol) already by ∼420-400 Ma.

    “The first appearance of fossil charcoal in the Late Silurian (11) and its ongoing occurrence through the Devonian (12) (Table S1), albeit rare and at low concentrations, indicates O2 > 15 -17% (vol) of the atmosphere (13) (or O2 > ∼ 0.7 PAL assuming a constant N2 reservoir) already by ∼ 420 -400 Ma.”
  • The early charcoal record was compiled from the literature using existing compilations and checking them where possible against the original sources.

    “The early charcoal record (Table S1) was compiled from the literature (11, 12, 28, 44 -72) using existing compilations (12, 44 -47) and checking them where possible against the original sources.”

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Research works printed but not linked: 9

  1. [24]Hotton, C. L., Heuber, F. M., Griffing, D. H. & Bridge, J. S. (2001) in Plants Invade the Land: Evolutionary and Environmental Perspectives , eds. Gensel, P. G. & Edwards, D. (Columbia Univ. Press, New York), pp. 179-203.
  2. [25]Algeo, T. J., Scheckler, S. E. & Maynard, J. B. (2001) in Plants Invade the Land: Evolutionary and Environmental Perspectives , eds. Gensel, P. G. & Edwards, D. (Columbia Univ. Press, New York), pp. 213-236.
  3. [39]Brown, R., Scott, A. C. & Jones, T. P. (1994) Trans. R. Soc. Edinburgh Earth Sci. 84, 267-274.
  4. [54]Scott, A. C. (1978) Proc. Yorkshire Geol. Soc. 41, 461-508.
  5. [55]Scott, A. C. & Chaloner, W. G. (1983) Proc. R. Soc. London B 220, 163-182.
  6. [80]Diessel, C. F. K. (1985) Proc. 10th Int. Congr. Carb. Strat. Geol. Madrid 1983 4, 197-210.
  7. [81]Scott, A. C. & Meyer-Berthaud, B. (1985) Trans. R. Soc. Edinburgh Earth Sci. 76, 13-20.
  8. [86]Scott, A. C. & Collinson, M. E. (1978) in SEM in the Study of Sediments , ed. Whalley, W. B. (Geoabstracts, Norwich, U.K.), pp. 137-167.
  9. [103]Kalkreuth, W., Holz, M., Kern, M., Machado, G. Mexias, A., Silva, A. M., Willett, J., Finkleman, R. & Berger, H. (2006) Int. J. Coal Geol. , in press.

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Authors
Scott, A. C., & Glasspool, I. J.
Affiliations
  • Royal Holloway University of London (GB)
  • Field Museum of Natural History (US)
Venue
Proceedings of the National Academy of Sciences
Published
2006-07-18
Volume
103
Issue
29
Pages
10861-10865
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W1991612932
Cited by
437
References
99
Citations by year
2026: 23 · 2025: 24 · 2024: 39 · 2023: 24 · 2022: 32 · 2021: 22 · 2020: 31 · 2019: 21 · 2018: 15 · 2017: 18 · 2016: 27 · 2015: 24 · 2014: 17 · 2013: 30 · 2012: 16
FWCI
10.01
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Royal Holloway, University of London
Topics
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
  • Physical Sciences › Environmental Science › Global and Planetary Change › Fire effects on ecosystems
  • Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Coal and Its By-products
Keywords
atmospheric oxygen concentration, charcoal, Late Paleozoic, Late Devonian, Mississippian, Pennsylvanian, Permian, coal petrology, paleoclimate, paleovegetation
MeSH terms
Air, Charcoal, Biological Evolution, Fires, Oxygen, Time Factors

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