Journal
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
Volume 295, Issue 1-2, Pages 146-161Publisher
ELSEVIER
DOI: 10.1016/j.palaeo.2010.05.034
Keywords
Triassic; Stomatal density; Stomatal index; Seedfern; Atmospheric CO2; Palaeoclimate
Funding
- Utrecht University
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End-Triassic fluctuations in atmospheric carbon dioxide (CO2) concentration were reconstructed by the use of stomatal frequency analysis on a single plant species: the seedfern Lepidopteris ottonis (Goeppert) Schimper. Stomatal index showed no distinct intra- and interpinnule variation which makes it a suitable proxy for past relative CO2 changes. Records of decreasing stomatal index and density from the bottom to the top of the Rhaetian-Hettangian Wustenwelsberg section (Bavaria, Germany) indicate rising CO2 levels during the Triassic-Jurassic transition. Additionally, stomatal frequency data of fossil ginkgoalean leaves (Ginkgoites taeniatus (Braun) Harris) suggest a maximum palaeoatmospheric CO2 concentration of 2750 ppmv for the latest Triassic. (C) 2010 Elsevier B.V. All rights reserved.
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