Evidence for atmospheric pollution across the Permian-Triassic transition
Evidence for atmospheric pollution across the Permian-Triassic transition
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DOI：
10.1130/g39496.1
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发表时间：
2017-12-01
期刊：
影响因子：
5.8
通讯作者：
Bucher, Hugo
中科院分区：
文献类型：
--
作者：
Hochuli, Peter A.;Schneebeli-Hermann, Elke;Bucher, Hugo
在过去的几十年里，西伯利亚圈闭大火成岩省的就位和二叠纪-三叠纪海洋生物大灭绝之间的因果关系的证据越来越多。然而，西伯利亚火山活动如何影响陆生植被至今仍是一个有争议的问题。在这里，我们证明了植物生命周期的很大一部分，即它们的生殖器官，受到环境条件的不利影响。影响包括畸形的孢子和花粉粒，未分离的四分体，以及来自挪威近海芬马克平台的二叠纪-三叠纪沉积物的孢子和花粉（孢子壁）的暗色壁。这些形态变化与主要的碳同位素漂移和海洋大规模灭绝的共同发生可能表明，它们是由与西伯利亚陷阱排放有关的大气污染造成的。
Evidence for a cause-and-effect relationship between the emplacement of the Siberian Traps large igneous province and the Permian-Triassic marine mass extinction has been growing over the past decades. However, how the Siberian Traps volcanism affected the terrestrial vegetation is still a matter of controversy. Here, we demonstrate that a substantial part of plants' life cycle, namely their reproductive organs, was adversely affected by environmental conditions. Effects include malformed spores and pollen grains, unseparated tetrads, and darkened walls of spores and pollen (sporoderm) from Permian-Triassic sediments from the Finnmark Platform offshore Norway. The co-occurrence of these morphological changes with the main carbon isotope excursion and the marine mass extinction may suggest that they were caused by atmospheric pollution linked to Siberian Traps emissions.