Molecular preservation of Cenozoic conifer fossil lagersttten from banks island, the canadian Arctic
The molecular preservation of exceptionally preserved conifer needles from middle Miocene and Pliocene deposits on Banks Island, Canada, was investigated using pyrolysisgas chromatographymass spectrometry (Py-GC-MS). Solvent-extracted residues from Miocene Larix, Glyptostrobus, and Pinus, Pliocene P...
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2012
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Online Access: | https://researchers.mq.edu.au/en/publications/8ffe4b82-aed1-4ecf-9683-5341cbc7733c https://doi.org/10.2110/palo.2011.p11-031r http://www.scopus.com/inward/record.url?scp=84862136991&partnerID=8YFLogxK |
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ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/8ffe4b82-aed1-4ecf-9683-5341cbc7733c 2023-05-15T14:25:35+02:00 Molecular preservation of Cenozoic conifer fossil lagersttten from banks island, the canadian Arctic Witkowski, Caitlyn Gupta, Neal S. Yang, Hong Leng, Qin Williams, Christopher J. Briggs, Derek E G Summons, Roger E. 2012-05 https://researchers.mq.edu.au/en/publications/8ffe4b82-aed1-4ecf-9683-5341cbc7733c https://doi.org/10.2110/palo.2011.p11-031r http://www.scopus.com/inward/record.url?scp=84862136991&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Witkowski , C , Gupta , N S , Yang , H , Leng , Q , Williams , C J , Briggs , D E G & Summons , R E 2012 , ' Molecular preservation of Cenozoic conifer fossil lagersttten from banks island, the canadian Arctic ' , Palaios , vol. 27 , no. 5 , pp. 279-287 . https://doi.org/10.2110/palo.2011.p11-031r article 2012 ftmacquarieunicr https://doi.org/10.2110/palo.2011.p11-031r 2022-11-06T06:50:01Z The molecular preservation of exceptionally preserved conifer needles from middle Miocene and Pliocene deposits on Banks Island, Canada, was investigated using pyrolysisgas chromatographymass spectrometry (Py-GC-MS). Solvent-extracted residues from Miocene Larix, Glyptostrobus, and Pinus, Pliocene Picea, and their associated bulk material, yielded abundant polysaccharide pyrolysis products, such as 2-methylfuran, 2-furaldehyde, and levoglucosan, indicating excellent molecular preservation. Comparison of pyrolysates of individual plant taxa and bulk material from the same deposits revealed the dominance of particular plant taxa in these high latitude floras. Comparison with fossil Lagersttten from Ellesmere Island (late Paleocene) and Axel Heiberg Island (middle Eocene), both in the Canadian Arctic Archipelago, and Clarkia in Idaho, United States (middle Miocene), demonstrated that the quality of molecular preservation of material from Banks Island is similar to that of Axel Heiberg Island and lies between those of Ellesmere Island and the Clarkia deposit. The ranking of molecular preservation was paralleled by scanning electron microscopy (SEM) observations. Analysis of Larix and Glyptostrobus from different geological ages (Eocenerecent) and locations indicated that age does not correlate with molecular preservation in these fossil Lagersttten. When relative abundance ratios of vinyl phenol (m/z 91120), guaiacyl (m/z 109124), and levoglucosan (m/z 6073) are used as indicators of the preservation of cutin, lignin, and cellulose, our results suggest that variations in the pyrolysates among several genera reflect different original molecular compositions as well as paleoenvironmental conditions for preservation. The data also illuminate the role of labile biomolecules in the taphonomy of three-dimensionally preserved morphological structures in these Arctic plant fossils. Article in Journal/Newspaper Arctic Arctic Archipelago Arctic Axel Heiberg Island Banks Island Canadian Arctic Archipelago Ellesmere Island Macquarie University Research Portal Arctic Ellesmere Island Canadian Arctic Archipelago Canada Heiberg ENVELOPE(13.964,13.964,66.424,66.424) Axel Heiberg Island ENVELOPE(-91.001,-91.001,79.752,79.752) PALAIOS 27 5 279 287 |
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Open Polar |
collection |
Macquarie University Research Portal |
op_collection_id |
ftmacquarieunicr |
language |
English |
description |
The molecular preservation of exceptionally preserved conifer needles from middle Miocene and Pliocene deposits on Banks Island, Canada, was investigated using pyrolysisgas chromatographymass spectrometry (Py-GC-MS). Solvent-extracted residues from Miocene Larix, Glyptostrobus, and Pinus, Pliocene Picea, and their associated bulk material, yielded abundant polysaccharide pyrolysis products, such as 2-methylfuran, 2-furaldehyde, and levoglucosan, indicating excellent molecular preservation. Comparison of pyrolysates of individual plant taxa and bulk material from the same deposits revealed the dominance of particular plant taxa in these high latitude floras. Comparison with fossil Lagersttten from Ellesmere Island (late Paleocene) and Axel Heiberg Island (middle Eocene), both in the Canadian Arctic Archipelago, and Clarkia in Idaho, United States (middle Miocene), demonstrated that the quality of molecular preservation of material from Banks Island is similar to that of Axel Heiberg Island and lies between those of Ellesmere Island and the Clarkia deposit. The ranking of molecular preservation was paralleled by scanning electron microscopy (SEM) observations. Analysis of Larix and Glyptostrobus from different geological ages (Eocenerecent) and locations indicated that age does not correlate with molecular preservation in these fossil Lagersttten. When relative abundance ratios of vinyl phenol (m/z 91120), guaiacyl (m/z 109124), and levoglucosan (m/z 6073) are used as indicators of the preservation of cutin, lignin, and cellulose, our results suggest that variations in the pyrolysates among several genera reflect different original molecular compositions as well as paleoenvironmental conditions for preservation. The data also illuminate the role of labile biomolecules in the taphonomy of three-dimensionally preserved morphological structures in these Arctic plant fossils. |
format |
Article in Journal/Newspaper |
author |
Witkowski, Caitlyn Gupta, Neal S. Yang, Hong Leng, Qin Williams, Christopher J. Briggs, Derek E G Summons, Roger E. |
spellingShingle |
Witkowski, Caitlyn Gupta, Neal S. Yang, Hong Leng, Qin Williams, Christopher J. Briggs, Derek E G Summons, Roger E. Molecular preservation of Cenozoic conifer fossil lagersttten from banks island, the canadian Arctic |
author_facet |
Witkowski, Caitlyn Gupta, Neal S. Yang, Hong Leng, Qin Williams, Christopher J. Briggs, Derek E G Summons, Roger E. |
author_sort |
Witkowski, Caitlyn |
title |
Molecular preservation of Cenozoic conifer fossil lagersttten from banks island, the canadian Arctic |
title_short |
Molecular preservation of Cenozoic conifer fossil lagersttten from banks island, the canadian Arctic |
title_full |
Molecular preservation of Cenozoic conifer fossil lagersttten from banks island, the canadian Arctic |
title_fullStr |
Molecular preservation of Cenozoic conifer fossil lagersttten from banks island, the canadian Arctic |
title_full_unstemmed |
Molecular preservation of Cenozoic conifer fossil lagersttten from banks island, the canadian Arctic |
title_sort |
molecular preservation of cenozoic conifer fossil lagersttten from banks island, the canadian arctic |
publishDate |
2012 |
url |
https://researchers.mq.edu.au/en/publications/8ffe4b82-aed1-4ecf-9683-5341cbc7733c https://doi.org/10.2110/palo.2011.p11-031r http://www.scopus.com/inward/record.url?scp=84862136991&partnerID=8YFLogxK |
long_lat |
ENVELOPE(13.964,13.964,66.424,66.424) ENVELOPE(-91.001,-91.001,79.752,79.752) |
geographic |
Arctic Ellesmere Island Canadian Arctic Archipelago Canada Heiberg Axel Heiberg Island |
geographic_facet |
Arctic Ellesmere Island Canadian Arctic Archipelago Canada Heiberg Axel Heiberg Island |
genre |
Arctic Arctic Archipelago Arctic Axel Heiberg Island Banks Island Canadian Arctic Archipelago Ellesmere Island |
genre_facet |
Arctic Arctic Archipelago Arctic Axel Heiberg Island Banks Island Canadian Arctic Archipelago Ellesmere Island |
op_source |
Witkowski , C , Gupta , N S , Yang , H , Leng , Q , Williams , C J , Briggs , D E G & Summons , R E 2012 , ' Molecular preservation of Cenozoic conifer fossil lagersttten from banks island, the canadian Arctic ' , Palaios , vol. 27 , no. 5 , pp. 279-287 . https://doi.org/10.2110/palo.2011.p11-031r |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.2110/palo.2011.p11-031r |
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PALAIOS |
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27 |
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279 |
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287 |
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