Atmospheric CO2 from fossil plant cuticles

Hans Kerp ()
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Hans Kerp: Forschungsstelle für Paläobotanik, Geologisch-Paläontologisches Institut, Westfälische Wilhelms-Universität

Nature, 2002, vol. 415, issue 6867, 38-38

Abstract: Abstract Plants respond to changes in atmospheric carbon dioxide levels by regulating the number of stomata in their leaves. In his reconstruction of a continuous, 300-million-year record of atmospheric CO2, Retallack bases his curve on stomatal counts of fossil plant cuticles taken from published micrographs1. However, the preservation of cuticles from Permian times is generally too fragmentary for the stomatal index to be reliably determined, the micrographs used could have biased the results, and there are important errors in the supplementary data1 — all of which cast doubt on the Permian part of Retallack's record.

Date: 2002
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DOI: 10.1038/415038a

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