Changing CO2 conditions during the end-Triassic inferred from stomatal frequency analysis on Lepidopteris ottonis (Goeppert) Schimper and Ginkgoites taeniatus (Braun) Harris

被引：70

作者：

Bonis, N. R. ^{[1
]}

Van Konijnenburg-Van Cittert, J. H. A. ^{[1
,2
]}

Kurschner, W. M. ^{[1
]}

机构：

[1] Univ Utrecht, Fac Sci, Lab Palaeobot & Palynol, Inst Environm Biol, NL-3584 CD Utrecht, Netherlands

[2] Netherlands Ctr Biodivers Nat, NL-2300 RA Leiden, Netherlands

来源：

PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY | 2010年 / 295卷 / 1-2期

关键词：

Triassic; Stomatal density; Stomatal index; Seedfern; Atmospheric CO2; Palaeoclimate; ATMOSPHERIC CARBON-DIOXIDE; JURASSIC BOUNDARY; FOSSIL PLANTS; ISOTOPE STRATIGRAPHY; PEDOGENIC CARBONATE; TERRESTRIAL; DENSITY; SIGNAL; INDEX; LEAF;

D O I：

10.1016/j.palaeo.2010.05.034

中图分类号：

P9 [自然地理学];

学科分类号：

070501 [自然地理学];

摘要：

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.

引用

页码：146 / 161

页数：16

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