Temporal changes in size distributions of the Southern Ocean diatom Fragilariopsis kerguelensis through high-throughput microscopy of sediment trap samples
Some aspects of the life cycle of the Southern Ocean diatom Fragilariopsis kerguelensis have been investigated previously, but many of its details have not been surveyed in nature. We investigated material from a two-year sediment trap time series by high-throughput imaging and image analysis, looki...
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/203454 2024-01-14T10:01:25+01:00 Temporal changes in size distributions of the Southern Ocean diatom Fragilariopsis kerguelensis through high-throughput microscopy of sediment trap samples Kloster, Michael Rigual-Hernandez, Andres S Armand, Leanne Kauer, Gerhard Trull, Thomas W Beszteri, Bank 16 pages application/pdf http://hdl.handle.net/1885/203454 https://doi.org/10.1080/0269249X.2019.1626770 https://openresearch-repository.anu.edu.au/bitstream/1885/203454/5/01_%2bKLOSTER_Temporal_changes_in_size_2019.pdf.jpg en_AU eng Taylor & Francis 0269-249X http://hdl.handle.net/1885/203454 doi:10.1080/0269249X.2019.1626770 https://openresearch-repository.anu.edu.au/bitstream/1885/203454/5/01_%2bKLOSTER_Temporal_changes_in_size_2019.pdf.jpg © 2019 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group https://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Diatom Research morphometry phytoplankton SHERPA slide scanner valve size distribution Journal article ftanucanberra https://doi.org/10.1080/0269249X.2019.1626770 2023-12-15T09:38:45Z Some aspects of the life cycle of the Southern Ocean diatom Fragilariopsis kerguelensis have been investigated previously, but many of its details have not been surveyed in nature. We investigated material from a two-year sediment trap time series by high-throughput imaging and image analysis, looking for morphometric signals of life cycle stages. Valve length distributions appeared close to unimodal but positively (right-) skewed. Size cohorts resulting from synchronized sexual reproduction events were not clearly distinguishable. Nevertheless, based on changes in valve length distributions, we found three general seasonal phases. These corresponded to periods of proliferation (with higher proportions of smaller cells during late spring/early summer), cessation of growth (relative loss of smaller cells during late summer/early autumn), and overwintering (little change in size distributions, with an increased proportion of large cells). We discuss possible causes of these signals, and their relevance to growth, sexual activity and adaption to environmental conditions, such as grazing pressures and the need for an overwintering strategy. This work was supported by the Deutsche Forschungsgemeinschaft (DFG) in the framework of the priority programme 1158 ‘Antarctic Research with comparative investigations in Arctic ice areas’ under grant nr. BE4316/4-1, KA1655/3-1; and by an outgoing scholarship, as well as travel expenses, granted by the Helmholtz Graduate School for Polar and Marine Research (POLMAR). Part of this work was supported by the Australian Government’s Australian Antarctic Science Grant Program under project number 4078, and Macquarie University (A. RigualHernández and L. Armand). Article in Journal/Newspaper Antarc* Antarctic Arctic Phytoplankton Southern Ocean Australian National University: ANU Digital Collections Arctic Antarctic Southern Ocean Diatom Research 34 3 133 147 |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
English |
topic |
morphometry phytoplankton SHERPA slide scanner valve size distribution |
spellingShingle |
morphometry phytoplankton SHERPA slide scanner valve size distribution Kloster, Michael Rigual-Hernandez, Andres S Armand, Leanne Kauer, Gerhard Trull, Thomas W Beszteri, Bank Temporal changes in size distributions of the Southern Ocean diatom Fragilariopsis kerguelensis through high-throughput microscopy of sediment trap samples |
topic_facet |
morphometry phytoplankton SHERPA slide scanner valve size distribution |
description |
Some aspects of the life cycle of the Southern Ocean diatom Fragilariopsis kerguelensis have been investigated previously, but many of its details have not been surveyed in nature. We investigated material from a two-year sediment trap time series by high-throughput imaging and image analysis, looking for morphometric signals of life cycle stages. Valve length distributions appeared close to unimodal but positively (right-) skewed. Size cohorts resulting from synchronized sexual reproduction events were not clearly distinguishable. Nevertheless, based on changes in valve length distributions, we found three general seasonal phases. These corresponded to periods of proliferation (with higher proportions of smaller cells during late spring/early summer), cessation of growth (relative loss of smaller cells during late summer/early autumn), and overwintering (little change in size distributions, with an increased proportion of large cells). We discuss possible causes of these signals, and their relevance to growth, sexual activity and adaption to environmental conditions, such as grazing pressures and the need for an overwintering strategy. This work was supported by the Deutsche Forschungsgemeinschaft (DFG) in the framework of the priority programme 1158 ‘Antarctic Research with comparative investigations in Arctic ice areas’ under grant nr. BE4316/4-1, KA1655/3-1; and by an outgoing scholarship, as well as travel expenses, granted by the Helmholtz Graduate School for Polar and Marine Research (POLMAR). Part of this work was supported by the Australian Government’s Australian Antarctic Science Grant Program under project number 4078, and Macquarie University (A. RigualHernández and L. Armand). |
format |
Article in Journal/Newspaper |
author |
Kloster, Michael Rigual-Hernandez, Andres S Armand, Leanne Kauer, Gerhard Trull, Thomas W Beszteri, Bank |
author_facet |
Kloster, Michael Rigual-Hernandez, Andres S Armand, Leanne Kauer, Gerhard Trull, Thomas W Beszteri, Bank |
author_sort |
Kloster, Michael |
title |
Temporal changes in size distributions of the Southern Ocean diatom Fragilariopsis kerguelensis through high-throughput microscopy of sediment trap samples |
title_short |
Temporal changes in size distributions of the Southern Ocean diatom Fragilariopsis kerguelensis through high-throughput microscopy of sediment trap samples |
title_full |
Temporal changes in size distributions of the Southern Ocean diatom Fragilariopsis kerguelensis through high-throughput microscopy of sediment trap samples |
title_fullStr |
Temporal changes in size distributions of the Southern Ocean diatom Fragilariopsis kerguelensis through high-throughput microscopy of sediment trap samples |
title_full_unstemmed |
Temporal changes in size distributions of the Southern Ocean diatom Fragilariopsis kerguelensis through high-throughput microscopy of sediment trap samples |
title_sort |
temporal changes in size distributions of the southern ocean diatom fragilariopsis kerguelensis through high-throughput microscopy of sediment trap samples |
publisher |
Taylor & Francis |
url |
http://hdl.handle.net/1885/203454 https://doi.org/10.1080/0269249X.2019.1626770 https://openresearch-repository.anu.edu.au/bitstream/1885/203454/5/01_%2bKLOSTER_Temporal_changes_in_size_2019.pdf.jpg |
geographic |
Arctic Antarctic Southern Ocean |
geographic_facet |
Arctic Antarctic Southern Ocean |
genre |
Antarc* Antarctic Arctic Phytoplankton Southern Ocean |
genre_facet |
Antarc* Antarctic Arctic Phytoplankton Southern Ocean |
op_source |
Diatom Research |
op_relation |
0269-249X http://hdl.handle.net/1885/203454 doi:10.1080/0269249X.2019.1626770 https://openresearch-repository.anu.edu.au/bitstream/1885/203454/5/01_%2bKLOSTER_Temporal_changes_in_size_2019.pdf.jpg |
op_rights |
© 2019 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group https://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
op_doi |
https://doi.org/10.1080/0269249X.2019.1626770 |
container_title |
Diatom Research |
container_volume |
34 |
container_issue |
3 |
container_start_page |
133 |
op_container_end_page |
147 |
_version_ |
1788067193790922752 |