The following information was submitted:
Transactions: WSEAS TRANSACTIONS ON ENVIRONMENT AND DEVELOPMENT
Transactions ID Number: 27-595
Full Name: Andre Jasper
Position: Professor
Age: ON
Sex: Male
Address: Avenida Avelino Tallini, 171, Bairro Universitario
Country: BRAZIL
Tel: 0555137147000
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Fax: 0555137147001
E-mail address: ajasper@univates.br
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Title of the Paper: Permian and Triassic wildfires and atmospheric oxygen levels
Authors as they appear in the Paper: Dieter Uhl; André Jasper; Abdallah M.B. Abu Hamad; Michael Montenari
Email addresses of all the authors: dieter.uhl@senckenberg.de; ajasper@univates.br: dieter.uhl@senckenberg.de; m.montenari@esci.keele.ac.uk
Number of paper pages: 10
Abstract: Our present knowledge of Permian and Triassic occurrences of fossil charcoal, as direct evidence of palaeo-wildfire, is summarized. These data show that contrary to previous assumptions at least for the Permian a more or les continuous fossil record of charcoal exists. Permian gaps in the fossil record of charcoal are very likely to be explained by taphonomic biases and can not be linked to changes in atmospheric oxygen concentrations. In contrast the record of Triassic charcoal seems to be extremely scarce and this scarcity may be linked, at least to some extent, to rather low oxygen levels. However, parallel to the delayed recovery of terrestrial vegetation after the mass extinction at the Permian-Triassic boundary the fossil record of charcoal improves from the Ladinian up to the Rhaetian, contrary to a drop in atmospheric oxygen concentrations reconstructed by geochemical modeling. Probably a simple correlation between atmospheric oxygen concentrations and the !
fre-quency and intensity of naturally occurring wildfires may not be as easily linked to the abundance of fossil charcoal as proposed earlier. Additional factors like taphonomical filters should be taken into account whenever it is attempted to use the frequency and abundance of fossil charcoal as evidence for changes in atmospheric oxygen concentrations.
Keywords: Permian; Triassic; charcoal; atmospheric oxygen; taphonomy; vegetation recovery
EXTENSION of the file: .pdf
Special (Invited) Session: Permian and Triassic wildfires and atmospheric oxygen levels
Organizer of the Session: 598-266.pdf
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