Arctic ice and the ecological rise of the dinosaurs
Abundant lake ice-rafted debris in Late Triassic and earliest Jurassic strata of the Junggar Basin of northwestern China (paleolatitude ~71°N) indicates that freezing winter temperatures typified the forested Arctic, despite a persistence of extremely high levels of atmospheric P co 2 (partial press...
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American Association for the Advancement of Science (AAAS)
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Online Access: | http://dx.doi.org/10.1126/sciadv.abo6342 https://www.science.org/doi/pdf/10.1126/sciadv.abo6342 |
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craaas:10.1126/sciadv.abo6342 2024-09-09T19:20:21+00:00 Arctic ice and the ecological rise of the dinosaurs Olsen, Paul Sha, Jingeng Fang, Yanan Chang, Clara Whiteside, Jessica H. Kinney, Sean Sues, Hans-Dieter Kent, Dennis Schaller, Morgan Vajda, Vivi 2022 http://dx.doi.org/10.1126/sciadv.abo6342 https://www.science.org/doi/pdf/10.1126/sciadv.abo6342 en eng American Association for the Advancement of Science (AAAS) Science Advances volume 8, issue 26 ISSN 2375-2548 journal-article 2022 craaas https://doi.org/10.1126/sciadv.abo6342 2024-08-15T04:00:44Z Abundant lake ice-rafted debris in Late Triassic and earliest Jurassic strata of the Junggar Basin of northwestern China (paleolatitude ~71°N) indicates that freezing winter temperatures typified the forested Arctic, despite a persistence of extremely high levels of atmospheric P co 2 (partial pressure of CO 2 ). Phylogenetic bracket analysis shows that non-avian dinosaurs were primitively insulated, enabling them to access rich deciduous and evergreen Arctic vegetation, even under freezing winter conditions. Transient but intense volcanic winters associated with massive eruptions and lowered light levels led to the end-Triassic mass extinction (201.6 Ma) on land, decimating all medium- to large-sized nondinosaurian, noninsulated continental reptiles. In contrast, insulated dinosaurs were already well adapted to cold temperatures, and not only survived but also underwent a rapid adaptive radiation and ecological expansion in the Jurassic, taking over regions formerly dominated by large noninsulated reptiles. Article in Journal/Newspaper Arctic AAAS Resource Center (American Association for the Advancement of Science) Arctic Science Advances 8 26 |
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Open Polar |
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AAAS Resource Center (American Association for the Advancement of Science) |
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craaas |
language |
English |
description |
Abundant lake ice-rafted debris in Late Triassic and earliest Jurassic strata of the Junggar Basin of northwestern China (paleolatitude ~71°N) indicates that freezing winter temperatures typified the forested Arctic, despite a persistence of extremely high levels of atmospheric P co 2 (partial pressure of CO 2 ). Phylogenetic bracket analysis shows that non-avian dinosaurs were primitively insulated, enabling them to access rich deciduous and evergreen Arctic vegetation, even under freezing winter conditions. Transient but intense volcanic winters associated with massive eruptions and lowered light levels led to the end-Triassic mass extinction (201.6 Ma) on land, decimating all medium- to large-sized nondinosaurian, noninsulated continental reptiles. In contrast, insulated dinosaurs were already well adapted to cold temperatures, and not only survived but also underwent a rapid adaptive radiation and ecological expansion in the Jurassic, taking over regions formerly dominated by large noninsulated reptiles. |
format |
Article in Journal/Newspaper |
author |
Olsen, Paul Sha, Jingeng Fang, Yanan Chang, Clara Whiteside, Jessica H. Kinney, Sean Sues, Hans-Dieter Kent, Dennis Schaller, Morgan Vajda, Vivi |
spellingShingle |
Olsen, Paul Sha, Jingeng Fang, Yanan Chang, Clara Whiteside, Jessica H. Kinney, Sean Sues, Hans-Dieter Kent, Dennis Schaller, Morgan Vajda, Vivi Arctic ice and the ecological rise of the dinosaurs |
author_facet |
Olsen, Paul Sha, Jingeng Fang, Yanan Chang, Clara Whiteside, Jessica H. Kinney, Sean Sues, Hans-Dieter Kent, Dennis Schaller, Morgan Vajda, Vivi |
author_sort |
Olsen, Paul |
title |
Arctic ice and the ecological rise of the dinosaurs |
title_short |
Arctic ice and the ecological rise of the dinosaurs |
title_full |
Arctic ice and the ecological rise of the dinosaurs |
title_fullStr |
Arctic ice and the ecological rise of the dinosaurs |
title_full_unstemmed |
Arctic ice and the ecological rise of the dinosaurs |
title_sort |
arctic ice and the ecological rise of the dinosaurs |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2022 |
url |
http://dx.doi.org/10.1126/sciadv.abo6342 https://www.science.org/doi/pdf/10.1126/sciadv.abo6342 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Science Advances volume 8, issue 26 ISSN 2375-2548 |
op_doi |
https://doi.org/10.1126/sciadv.abo6342 |
container_title |
Science Advances |
container_volume |
8 |
container_issue |
26 |
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1809760491427332096 |