Measurements of valves of the diatom Fragilariopsis kerguelensis from Southern Ocean sediment core PS1768-8
Fragilariopsis kerguelensis is one of the most abundant diatoms in the sediments of the Southern Ocean. Its morphometric features have been proposed as proxies, based on links with, for example, iron availability, sea surface temperature and glacial/interglacial conditions. We investigated morphomet...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.892593 2023-05-15T14:04:56+02:00 Measurements of valves of the diatom Fragilariopsis kerguelensis from Southern Ocean sediment core PS1768-8 Kloster, Michael Kauer, Gerhard Esper, Oliver Fuchs, Nike Beszteri, Bánk LATITUDE: -52.593000 * LONGITUDE: 4.476000 * DATE/TIME START: 1989-11-11T21:40:00 * DATE/TIME END: 1989-11-11T21:40:00 2018-07-19 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.892593 https://doi.org/10.1594/PANGAEA.892593 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.892593 https://doi.org/10.1594/PANGAEA.892593 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Kloster, Michael; Kauer, Gerhard; Esper, Oliver; Fuchs, Nike; Beszteri, Bánk (2018): Morphometry of the diatom Fragilariopsis kerguelensis from Southern Ocean sediment: High-throughput measurements show second morphotype occurring during glacials. Marine Micropaleontology, https://doi.org/10.1016/j.marmicro.2018.07.002 ANT-VIII/3 Gravity corer (Kiel type) Polarstern Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas PS16 PS16/311 PS1768-8 Shona Ridge SL SPP1158 Dataset 2018 ftpangaea https://doi.org/10.1594/PANGAEA.892593 https://doi.org/10.1016/j.marmicro.2018.07.002 2023-01-20T07:34:11Z Fragilariopsis kerguelensis is one of the most abundant diatoms in the sediments of the Southern Ocean. Its morphometric features have been proposed as proxies, based on links with, for example, iron availability, sea surface temperature and glacial/interglacial conditions. We investigated morphometric changes in F. kerguelensis valves in a well-studied sediment core record, focusing on transition periods between glacials and interglacials. By applying a high-throughput diatom imaging and morphometry workflow, we found two clearly distinct morphotypes which were differentiated by their rectangularity. One of them occurred preferentially in glacial samples, whilst the other persisted throughout. This indicates that their relative abundances depend on environmental conditions and thereby points to the possibility that paleo-proxies based on F. kerguelensis valve morphometric features might in the future benefit from differentiating these two morphotypes. As an initial exploration of this idea, we show that the abundance ratio of both morphotypes correlates well with paleo-temperatures which had been reconstructed using independent data from the same core. Distinguishing between the two morphotypes only became possible by image analysis for precisely measuring diatom valve outlines and area, highlighting the potential of such methods for diatom analyses. Dataset Antarc* Antarctic Arctic Sea ice Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Arctic Antarctic Southern Ocean Shona Ridge ENVELOPE(2.750,2.750,-51.000,-51.000) ENVELOPE(4.476000,4.476000,-52.593000,-52.593000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANT-VIII/3 Gravity corer (Kiel type) Polarstern Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas PS16 PS16/311 PS1768-8 Shona Ridge SL SPP1158 |
spellingShingle |
ANT-VIII/3 Gravity corer (Kiel type) Polarstern Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas PS16 PS16/311 PS1768-8 Shona Ridge SL SPP1158 Kloster, Michael Kauer, Gerhard Esper, Oliver Fuchs, Nike Beszteri, Bánk Measurements of valves of the diatom Fragilariopsis kerguelensis from Southern Ocean sediment core PS1768-8 |
topic_facet |
ANT-VIII/3 Gravity corer (Kiel type) Polarstern Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas PS16 PS16/311 PS1768-8 Shona Ridge SL SPP1158 |
description |
Fragilariopsis kerguelensis is one of the most abundant diatoms in the sediments of the Southern Ocean. Its morphometric features have been proposed as proxies, based on links with, for example, iron availability, sea surface temperature and glacial/interglacial conditions. We investigated morphometric changes in F. kerguelensis valves in a well-studied sediment core record, focusing on transition periods between glacials and interglacials. By applying a high-throughput diatom imaging and morphometry workflow, we found two clearly distinct morphotypes which were differentiated by their rectangularity. One of them occurred preferentially in glacial samples, whilst the other persisted throughout. This indicates that their relative abundances depend on environmental conditions and thereby points to the possibility that paleo-proxies based on F. kerguelensis valve morphometric features might in the future benefit from differentiating these two morphotypes. As an initial exploration of this idea, we show that the abundance ratio of both morphotypes correlates well with paleo-temperatures which had been reconstructed using independent data from the same core. Distinguishing between the two morphotypes only became possible by image analysis for precisely measuring diatom valve outlines and area, highlighting the potential of such methods for diatom analyses. |
format |
Dataset |
author |
Kloster, Michael Kauer, Gerhard Esper, Oliver Fuchs, Nike Beszteri, Bánk |
author_facet |
Kloster, Michael Kauer, Gerhard Esper, Oliver Fuchs, Nike Beszteri, Bánk |
author_sort |
Kloster, Michael |
title |
Measurements of valves of the diatom Fragilariopsis kerguelensis from Southern Ocean sediment core PS1768-8 |
title_short |
Measurements of valves of the diatom Fragilariopsis kerguelensis from Southern Ocean sediment core PS1768-8 |
title_full |
Measurements of valves of the diatom Fragilariopsis kerguelensis from Southern Ocean sediment core PS1768-8 |
title_fullStr |
Measurements of valves of the diatom Fragilariopsis kerguelensis from Southern Ocean sediment core PS1768-8 |
title_full_unstemmed |
Measurements of valves of the diatom Fragilariopsis kerguelensis from Southern Ocean sediment core PS1768-8 |
title_sort |
measurements of valves of the diatom fragilariopsis kerguelensis from southern ocean sediment core ps1768-8 |
publisher |
PANGAEA |
publishDate |
2018 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.892593 https://doi.org/10.1594/PANGAEA.892593 |
op_coverage |
LATITUDE: -52.593000 * LONGITUDE: 4.476000 * DATE/TIME START: 1989-11-11T21:40:00 * DATE/TIME END: 1989-11-11T21:40:00 |
long_lat |
ENVELOPE(2.750,2.750,-51.000,-51.000) ENVELOPE(4.476000,4.476000,-52.593000,-52.593000) |
geographic |
Arctic Antarctic Southern Ocean Shona Ridge |
geographic_facet |
Arctic Antarctic Southern Ocean Shona Ridge |
genre |
Antarc* Antarctic Arctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Arctic Sea ice Southern Ocean |
op_source |
Supplement to: Kloster, Michael; Kauer, Gerhard; Esper, Oliver; Fuchs, Nike; Beszteri, Bánk (2018): Morphometry of the diatom Fragilariopsis kerguelensis from Southern Ocean sediment: High-throughput measurements show second morphotype occurring during glacials. Marine Micropaleontology, https://doi.org/10.1016/j.marmicro.2018.07.002 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.892593 https://doi.org/10.1594/PANGAEA.892593 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.892593 https://doi.org/10.1016/j.marmicro.2018.07.002 |
_version_ |
1766276403964149760 |