Molecular fossils as a tool for tracking Holocene sea‐level change in the Loch of Stenness, Orkney
ABSTRACT Sediments deposited in the Loch of Stenness (Orkney Islands, Scotland) during the Holocene transgression, previously dated to between ~5939–5612 bp , were analysed for molecular fossils – lipids and chlorophyll pigments from primary producers – that complement conventional microfossil and l...
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crwiley:10.1002/jqs.3238 2024-06-02T07:55:56+00:00 Molecular fossils as a tool for tracking Holocene sea‐level change in the Loch of Stenness, Orkney Conti, Martina L. G. Bates, Martin R. Preece, Richard C. Penkman, Kirsty E. H. Keely, Brendan J. 2020 http://dx.doi.org/10.1002/jqs.3238 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3238 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jqs.3238 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Journal of Quaternary Science volume 35, issue 7, page 881-891 ISSN 0267-8179 1099-1417 journal-article 2020 crwiley https://doi.org/10.1002/jqs.3238 2024-05-03T11:57:19Z ABSTRACT Sediments deposited in the Loch of Stenness (Orkney Islands, Scotland) during the Holocene transgression, previously dated to between ~5939–5612 bp , were analysed for molecular fossils – lipids and chlorophyll pigments from primary producers – that complement conventional microfossil and lithological approaches for studying past sea‐level change. While microfossil and lithological studies identified a transgression between 102 and 81 cm core depth, key molecular fossils fluctuate in occurrence and concentration between 118 and 85 cm, suggesting an earlier start to the transgression. Terrestrial lipid concentrations decreased and algal‐derived, short‐chain, n ‐alkanoic acid concentrations increased at 118 cm, indicating a disruption of the freshwater lake conditions associated with the early stages of the marine transgression. The lipid and pigment analyses provided information that complements and extends that from microfossil analysis, presenting a more complete record of Holocene sea‐level changes and local vegetation changes in the Loch of Stenness. The isostatic stability of Stenness during the Holocene points towards other factors to explain the transgression, such as regional factors and/or melting of the Antarctic ice sheet (which occurred up to 3 ka). Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Wiley Online Library Antarctic The Antarctic Journal of Quaternary Science 35 7 881 891 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
ABSTRACT Sediments deposited in the Loch of Stenness (Orkney Islands, Scotland) during the Holocene transgression, previously dated to between ~5939–5612 bp , were analysed for molecular fossils – lipids and chlorophyll pigments from primary producers – that complement conventional microfossil and lithological approaches for studying past sea‐level change. While microfossil and lithological studies identified a transgression between 102 and 81 cm core depth, key molecular fossils fluctuate in occurrence and concentration between 118 and 85 cm, suggesting an earlier start to the transgression. Terrestrial lipid concentrations decreased and algal‐derived, short‐chain, n ‐alkanoic acid concentrations increased at 118 cm, indicating a disruption of the freshwater lake conditions associated with the early stages of the marine transgression. The lipid and pigment analyses provided information that complements and extends that from microfossil analysis, presenting a more complete record of Holocene sea‐level changes and local vegetation changes in the Loch of Stenness. The isostatic stability of Stenness during the Holocene points towards other factors to explain the transgression, such as regional factors and/or melting of the Antarctic ice sheet (which occurred up to 3 ka). |
format |
Article in Journal/Newspaper |
author |
Conti, Martina L. G. Bates, Martin R. Preece, Richard C. Penkman, Kirsty E. H. Keely, Brendan J. |
spellingShingle |
Conti, Martina L. G. Bates, Martin R. Preece, Richard C. Penkman, Kirsty E. H. Keely, Brendan J. Molecular fossils as a tool for tracking Holocene sea‐level change in the Loch of Stenness, Orkney |
author_facet |
Conti, Martina L. G. Bates, Martin R. Preece, Richard C. Penkman, Kirsty E. H. Keely, Brendan J. |
author_sort |
Conti, Martina L. G. |
title |
Molecular fossils as a tool for tracking Holocene sea‐level change in the Loch of Stenness, Orkney |
title_short |
Molecular fossils as a tool for tracking Holocene sea‐level change in the Loch of Stenness, Orkney |
title_full |
Molecular fossils as a tool for tracking Holocene sea‐level change in the Loch of Stenness, Orkney |
title_fullStr |
Molecular fossils as a tool for tracking Holocene sea‐level change in the Loch of Stenness, Orkney |
title_full_unstemmed |
Molecular fossils as a tool for tracking Holocene sea‐level change in the Loch of Stenness, Orkney |
title_sort |
molecular fossils as a tool for tracking holocene sea‐level change in the loch of stenness, orkney |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1002/jqs.3238 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3238 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jqs.3238 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_source |
Journal of Quaternary Science volume 35, issue 7, page 881-891 ISSN 0267-8179 1099-1417 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/jqs.3238 |
container_title |
Journal of Quaternary Science |
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35 |
container_issue |
7 |
container_start_page |
881 |
op_container_end_page |
891 |
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1800752151953145856 |