A new quantitative approach to identify reworking in Eocene to Miocene pollen records from offshore Antarctica using red fluorescence and digital imaging
Antarctic palaeoclimate evolution and vegetation history after the formation of a continent-scale cryosphere at the Eocene–Oligocene boundary, 33.9 million years ago, has remained a matter of controversy. In particular, the reconstruction of terrestrial climate and vegetation has been strongly hampe...
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European Geosciences Union
2017
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ftleedsuniv:oai:eprints.whiterose.ac.uk:118822 2023-05-15T13:38:35+02:00 A new quantitative approach to identify reworking in Eocene to Miocene pollen records from offshore Antarctica using red fluorescence and digital imaging Strother, SL Salzmann, U Sangiorgi, F Bijl, PK Pross, J Escutia, C Salabarnada, A Pound, MJ Voss, J Woodward, J 2017-04-24 text https://eprints.whiterose.ac.uk/118822/ https://eprints.whiterose.ac.uk/118822/13/bg-14-2089-2017.pdf https://eprints.whiterose.ac.uk/118822/7/SupplementaryInformation.pdf en eng European Geosciences Union https://eprints.whiterose.ac.uk/118822/13/bg-14-2089-2017.pdf https://eprints.whiterose.ac.uk/118822/7/SupplementaryInformation.pdf Strother, SL, Salzmann, U, Sangiorgi, F et al. (7 more authors) (2017) A new quantitative approach to identify reworking in Eocene to Miocene pollen records from offshore Antarctica using red fluorescence and digital imaging. Biogeosciences, 14 (8). pp. 2089-2100. ISSN 1726-4170 Article NonPeerReviewed 2017 ftleedsuniv 2023-01-30T21:56:50Z Antarctic palaeoclimate evolution and vegetation history after the formation of a continent-scale cryosphere at the Eocene–Oligocene boundary, 33.9 million years ago, has remained a matter of controversy. In particular, the reconstruction of terrestrial climate and vegetation has been strongly hampered by uncertainties in unambiguously identifying non-reworked as opposed to reworked sporomorphs that have been transported into Antarctic marine sedimentary records by waxing and waning ice sheets. Whereas reworked sporomorph grains over longer non-successive geological timescales are easily identifiable within younger sporomorph assemblages (e.g. Permian sporomorphs in Pliocene sediments), distinguishing non-reworked from reworked material in palynological assemblages over successive geological time periods (e.g. Eocene sporomorphs in Oligocene sediments) has remained problematic. This study presents a new quantitative approach to identifying non-reworked pollen assemblages in marine sediment cores from circum-Antarctic waters. We measured the fluorescence colour signature, including red, green, and blue fluorescence; brightness; intensity; and saturation values of selected pollen and spore taxa from Eocene, Oligocene, and Miocene sediments from the Wilkes Land margin Site U1356 (East Antarctica) recovered during Integrated Ocean Drilling Program (IODP) Expedition 318. Our study identified statistically significant differences in red-fluorescence values of non-reworked sporomorph taxa against age. We conclude that red fluorescence is a reliable parameter for identifying the presence of non-reworked pollen and spores in Antarctic marine sediment records from the circum-Antarctic realm that are influenced by glaciation and extensive reworking. Our study provides a new tool to accurately reconstruct Cenozoic terrestrial climate change on Antarctica using fossil pollen and spores. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Wilkes Land White Rose Research Online (Universities of Leeds, Sheffield & York) Antarctic East Antarctica Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) |
institution |
Open Polar |
collection |
White Rose Research Online (Universities of Leeds, Sheffield & York) |
op_collection_id |
ftleedsuniv |
language |
English |
description |
Antarctic palaeoclimate evolution and vegetation history after the formation of a continent-scale cryosphere at the Eocene–Oligocene boundary, 33.9 million years ago, has remained a matter of controversy. In particular, the reconstruction of terrestrial climate and vegetation has been strongly hampered by uncertainties in unambiguously identifying non-reworked as opposed to reworked sporomorphs that have been transported into Antarctic marine sedimentary records by waxing and waning ice sheets. Whereas reworked sporomorph grains over longer non-successive geological timescales are easily identifiable within younger sporomorph assemblages (e.g. Permian sporomorphs in Pliocene sediments), distinguishing non-reworked from reworked material in palynological assemblages over successive geological time periods (e.g. Eocene sporomorphs in Oligocene sediments) has remained problematic. This study presents a new quantitative approach to identifying non-reworked pollen assemblages in marine sediment cores from circum-Antarctic waters. We measured the fluorescence colour signature, including red, green, and blue fluorescence; brightness; intensity; and saturation values of selected pollen and spore taxa from Eocene, Oligocene, and Miocene sediments from the Wilkes Land margin Site U1356 (East Antarctica) recovered during Integrated Ocean Drilling Program (IODP) Expedition 318. Our study identified statistically significant differences in red-fluorescence values of non-reworked sporomorph taxa against age. We conclude that red fluorescence is a reliable parameter for identifying the presence of non-reworked pollen and spores in Antarctic marine sediment records from the circum-Antarctic realm that are influenced by glaciation and extensive reworking. Our study provides a new tool to accurately reconstruct Cenozoic terrestrial climate change on Antarctica using fossil pollen and spores. |
format |
Article in Journal/Newspaper |
author |
Strother, SL Salzmann, U Sangiorgi, F Bijl, PK Pross, J Escutia, C Salabarnada, A Pound, MJ Voss, J Woodward, J |
spellingShingle |
Strother, SL Salzmann, U Sangiorgi, F Bijl, PK Pross, J Escutia, C Salabarnada, A Pound, MJ Voss, J Woodward, J A new quantitative approach to identify reworking in Eocene to Miocene pollen records from offshore Antarctica using red fluorescence and digital imaging |
author_facet |
Strother, SL Salzmann, U Sangiorgi, F Bijl, PK Pross, J Escutia, C Salabarnada, A Pound, MJ Voss, J Woodward, J |
author_sort |
Strother, SL |
title |
A new quantitative approach to identify reworking in Eocene to Miocene pollen records from offshore Antarctica using red fluorescence and digital imaging |
title_short |
A new quantitative approach to identify reworking in Eocene to Miocene pollen records from offshore Antarctica using red fluorescence and digital imaging |
title_full |
A new quantitative approach to identify reworking in Eocene to Miocene pollen records from offshore Antarctica using red fluorescence and digital imaging |
title_fullStr |
A new quantitative approach to identify reworking in Eocene to Miocene pollen records from offshore Antarctica using red fluorescence and digital imaging |
title_full_unstemmed |
A new quantitative approach to identify reworking in Eocene to Miocene pollen records from offshore Antarctica using red fluorescence and digital imaging |
title_sort |
new quantitative approach to identify reworking in eocene to miocene pollen records from offshore antarctica using red fluorescence and digital imaging |
publisher |
European Geosciences Union |
publishDate |
2017 |
url |
https://eprints.whiterose.ac.uk/118822/ https://eprints.whiterose.ac.uk/118822/13/bg-14-2089-2017.pdf https://eprints.whiterose.ac.uk/118822/7/SupplementaryInformation.pdf |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) |
geographic |
Antarctic East Antarctica Wilkes Land |
geographic_facet |
Antarctic East Antarctica Wilkes Land |
genre |
Antarc* Antarctic Antarctica East Antarctica Wilkes Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Wilkes Land |
op_relation |
https://eprints.whiterose.ac.uk/118822/13/bg-14-2089-2017.pdf https://eprints.whiterose.ac.uk/118822/7/SupplementaryInformation.pdf Strother, SL, Salzmann, U, Sangiorgi, F et al. (7 more authors) (2017) A new quantitative approach to identify reworking in Eocene to Miocene pollen records from offshore Antarctica using red fluorescence and digital imaging. Biogeosciences, 14 (8). pp. 2089-2100. ISSN 1726-4170 |
_version_ |
1766108569051070464 |