Morphometry of the diatom Fragilariopsis kerguelensis from Southern Ocean sediment: High-throughput measurements show second morphotype occurring during glacials
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...
Published in: | Marine Micropaleontology |
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Online Access: | https://epic.awi.de/id/eprint/47937/ https://epic.awi.de/id/eprint/47937/1/Kloster-2018-Fkerg-2-morphotypes.pdf https://hdl.handle.net/10013/epic.6a77c1e9-5e3d-4fb0-8045-dd4ea0afd13d https://hdl.handle.net/ |
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ftawi:oai:epic.awi.de:47937 2023-05-15T18:25:00+02:00 Morphometry of the diatom Fragilariopsis kerguelensis from Southern Ocean sediment: High-throughput measurements show second morphotype occurring during glacials Kloster, Michael Kauer, Gerhard Esper, Oliver Fuchs, Nike Beszteri, Bank 2018 application/pdf https://epic.awi.de/id/eprint/47937/ https://epic.awi.de/id/eprint/47937/1/Kloster-2018-Fkerg-2-morphotypes.pdf https://hdl.handle.net/10013/epic.6a77c1e9-5e3d-4fb0-8045-dd4ea0afd13d https://hdl.handle.net/ unknown ELSEVIER SCIENCE BV https://epic.awi.de/id/eprint/47937/1/Kloster-2018-Fkerg-2-morphotypes.pdf https://hdl.handle.net/ Kloster, M. orcid:0000-0001-9244-4925 , Kauer, G. , Esper, O. orcid:0000-0002-4342-3471 , Fuchs, N. and Beszteri, B. orcid:0000-0002-6852-1588 (2018) Morphometry of the diatom Fragilariopsis kerguelensis from Southern Ocean sediment: High-throughput measurements show second morphotype occurring during glacials , Marine Micropaleontology, 143 , pp. 70-79 . doi:10.1016/j.marmicro.2018.07.002 <https://doi.org/10.1016/j.marmicro.2018.07.002> , hdl:10013/epic.6a77c1e9-5e3d-4fb0-8045-dd4ea0afd13d EPIC3Marine Micropaleontology, ELSEVIER SCIENCE BV, 143, pp. 70-79, ISSN: 0377-8398 Article isiRev 2018 ftawi https://doi.org/10.1016/j.marmicro.2018.07.002 2021-12-24T15:44:06Z 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. Article in Journal/Newspaper Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Southern Ocean Marine Micropaleontology 143 70 79 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
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 |
Article in Journal/Newspaper |
author |
Kloster, Michael Kauer, Gerhard Esper, Oliver Fuchs, Nike Beszteri, Bank |
spellingShingle |
Kloster, Michael Kauer, Gerhard Esper, Oliver Fuchs, Nike Beszteri, Bank Morphometry of the diatom Fragilariopsis kerguelensis from Southern Ocean sediment: High-throughput measurements show second morphotype occurring during glacials |
author_facet |
Kloster, Michael Kauer, Gerhard Esper, Oliver Fuchs, Nike Beszteri, Bank |
author_sort |
Kloster, Michael |
title |
Morphometry of the diatom Fragilariopsis kerguelensis from Southern Ocean sediment: High-throughput measurements show second morphotype occurring during glacials |
title_short |
Morphometry of the diatom Fragilariopsis kerguelensis from Southern Ocean sediment: High-throughput measurements show second morphotype occurring during glacials |
title_full |
Morphometry of the diatom Fragilariopsis kerguelensis from Southern Ocean sediment: High-throughput measurements show second morphotype occurring during glacials |
title_fullStr |
Morphometry of the diatom Fragilariopsis kerguelensis from Southern Ocean sediment: High-throughput measurements show second morphotype occurring during glacials |
title_full_unstemmed |
Morphometry of the diatom Fragilariopsis kerguelensis from Southern Ocean sediment: High-throughput measurements show second morphotype occurring during glacials |
title_sort |
morphometry of the diatom fragilariopsis kerguelensis from southern ocean sediment: high-throughput measurements show second morphotype occurring during glacials |
publisher |
ELSEVIER SCIENCE BV |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/47937/ https://epic.awi.de/id/eprint/47937/1/Kloster-2018-Fkerg-2-morphotypes.pdf https://hdl.handle.net/10013/epic.6a77c1e9-5e3d-4fb0-8045-dd4ea0afd13d https://hdl.handle.net/ |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
EPIC3Marine Micropaleontology, ELSEVIER SCIENCE BV, 143, pp. 70-79, ISSN: 0377-8398 |
op_relation |
https://epic.awi.de/id/eprint/47937/1/Kloster-2018-Fkerg-2-morphotypes.pdf https://hdl.handle.net/ Kloster, M. orcid:0000-0001-9244-4925 , Kauer, G. , Esper, O. orcid:0000-0002-4342-3471 , Fuchs, N. and Beszteri, B. orcid:0000-0002-6852-1588 (2018) Morphometry of the diatom Fragilariopsis kerguelensis from Southern Ocean sediment: High-throughput measurements show second morphotype occurring during glacials , Marine Micropaleontology, 143 , pp. 70-79 . doi:10.1016/j.marmicro.2018.07.002 <https://doi.org/10.1016/j.marmicro.2018.07.002> , hdl:10013/epic.6a77c1e9-5e3d-4fb0-8045-dd4ea0afd13d |
op_doi |
https://doi.org/10.1016/j.marmicro.2018.07.002 |
container_title |
Marine Micropaleontology |
container_volume |
143 |
container_start_page |
70 |
op_container_end_page |
79 |
_version_ |
1766206107458469888 |