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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Copernicus Publications
2017
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00010311 2023-05-15T13:34:49+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, Stephanie L. Salzmann, Ulrich Sangiorgi, Francesca Bijl, Peter K. Pross, Jörg Escutia, Carlota Salabarnada, Ariadna Pound, Matthew J. Voss, Jochen Woodward, John 2017-04 electronic https://doi.org/10.5194/bg-14-2089-2017 https://noa.gwlb.de/receive/cop_mods_00010311 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00010268/bg-14-2089-2017.pdf https://bg.copernicus.org/articles/14/2089/2017/bg-14-2089-2017.pdf eng eng Copernicus Publications Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-14-2089-2017 https://noa.gwlb.de/receive/cop_mods_00010311 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00010268/bg-14-2089-2017.pdf https://bg.copernicus.org/articles/14/2089/2017/bg-14-2089-2017.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2017 ftnonlinearchiv https://doi.org/10.5194/bg-14-2089-2017 2022-02-08T22:57:06Z 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 Niedersächsisches Online-Archiv NOA Antarctic East Antarctica Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Biogeosciences 14 8 2089 2100 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Strother, Stephanie L. Salzmann, Ulrich Sangiorgi, Francesca Bijl, Peter K. Pross, Jörg Escutia, Carlota Salabarnada, Ariadna Pound, Matthew J. Voss, Jochen Woodward, John A new quantitative approach to identify reworking in Eocene to Miocene pollen records from offshore Antarctica using red fluorescence and digital imaging |
topic_facet |
article Verlagsveröffentlichung |
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, Stephanie L. Salzmann, Ulrich Sangiorgi, Francesca Bijl, Peter K. Pross, Jörg Escutia, Carlota Salabarnada, Ariadna Pound, Matthew J. Voss, Jochen Woodward, John |
author_facet |
Strother, Stephanie L. Salzmann, Ulrich Sangiorgi, Francesca Bijl, Peter K. Pross, Jörg Escutia, Carlota Salabarnada, Ariadna Pound, Matthew J. Voss, Jochen Woodward, John |
author_sort |
Strother, Stephanie L. |
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 |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/bg-14-2089-2017 https://noa.gwlb.de/receive/cop_mods_00010311 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00010268/bg-14-2089-2017.pdf https://bg.copernicus.org/articles/14/2089/2017/bg-14-2089-2017.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 |
Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-14-2089-2017 https://noa.gwlb.de/receive/cop_mods_00010311 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00010268/bg-14-2089-2017.pdf https://bg.copernicus.org/articles/14/2089/2017/bg-14-2089-2017.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-14-2089-2017 |
container_title |
Biogeosciences |
container_volume |
14 |
container_issue |
8 |
container_start_page |
2089 |
op_container_end_page |
2100 |
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1766057915533230080 |