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Evidence for atmospheric pollution across the Permian-Triassic transition


Hochuli, Peter A; Schneebeli-Hermann, Elke; Mangerud, Gunn; Bucher, Hugo (2017). Evidence for atmospheric pollution across the Permian-Triassic transition. Geology, 45(12):1123-1126.

Abstract

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.

Abstract

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.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Paleontological Institute and Museum
Dewey Decimal Classification:560 Fossils & prehistoric life
Date:2017
Deposited On:29 Nov 2017 16:18
Last Modified:19 Feb 2018 09:26
Publisher:Geological Society of America
ISSN:0091-7613
OA Status:Closed
Publisher DOI:https://doi.org/10.1130/G39496.1

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Embargo till: 2018-10-27