Fossil plants and global warming at the Triassic-Jurassic boundary

被引:503
作者
McElwain, JC [1 ]
Beerling, DJ [1 ]
Woodward, FI [1 ]
机构
[1] Univ Sheffield, Dept Anim & Plant Sci, Sheffield S10 2TN, S Yorkshire, England
关键词
D O I
10.1126/science.285.5432.1386
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The Triassic-Jurassic boundary marks a major faunal mass extinction, but records of accompanying environmental changes are Limited. Paleobotanical evidence indicates a fourfold increase in atmospheric carbon dioxide concentration and suggests an associated 3 degrees to 4 degrees C "greenhouse" warming across the boundary. These environmental conditions are calculated to have raised leaf temperatures above a highly conserved Lethal Limit, perhaps contributing to the >95 percent species-level turnover of Triassic-Jurassic megaflora.
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收藏
页码:1386 / 1390
页数:5
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