Mesoscale oceanographic meanders influence protist community function and structure in the southern Indian Ocean
Abstract The interface between the nutrient‐rich Southern Ocean and oligotrophic Indian Ocean creates unique environmental conditions that can strongly influence biological processes. We investigated protist communities across a mesoscale meander of the Subtropical Front within the Southern Indian O...
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Online Access: | http://dx.doi.org/10.1111/1462-2920.16500 https://sfamjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1462-2920.16500 |
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crwiley:10.1111/1462-2920.16500 2024-06-02T08:14:45+00:00 Mesoscale oceanographic meanders influence protist community function and structure in the southern Indian Ocean Sturm, Daniela de Vries, Joost Balch, William M. Wheeler, Glen Brownlee, Colin H2020 European Research Council Leverhulme Trust National Science Foundation Natural Environment Research Council 2023 http://dx.doi.org/10.1111/1462-2920.16500 https://sfamjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1462-2920.16500 en eng Wiley http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/ Environmental Microbiology volume 25, issue 12, page 3161-3179 ISSN 1462-2912 1462-2920 journal-article 2023 crwiley https://doi.org/10.1111/1462-2920.16500 2024-05-03T10:38:27Z Abstract The interface between the nutrient‐rich Southern Ocean and oligotrophic Indian Ocean creates unique environmental conditions that can strongly influence biological processes. We investigated protist communities across a mesoscale meander of the Subtropical Front within the Southern Indian Ocean. 18S V9 rDNA metabarcoding suggests a diverse protist community in which the dinoflagellates and parasitic Syndiniales were abundant. Diversity was highest in frontal waters of the mesoscale meander, with differences in community structure inside and outside the meander. While the overall community was dominated by mixotrophic taxa, the frontal boundary of the meander had increased abundances of heterotrophic taxa, with potential implications for net atmospheric CO 2 drawdown. Pulse amplitude modulated (PAM) fluorimetry revealed significant differences in the photophysiology of phytoplankton communities inside and outside the meander. By using single‐cell PAM microscopy, we identified physiological differences between dinoflagellate and coccolithophore taxa, which may have contributed to changes in photophysiology observed at community level. Overall, our results demonstrate that frontal areas have a strong impact on the composition of protist communities in the Southern Ocean with important implications for understanding biological processes in this region. Article in Journal/Newspaper Southern Ocean Wiley Online Library Indian Southern Ocean Environmental Microbiology 25 12 3161 3179 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The interface between the nutrient‐rich Southern Ocean and oligotrophic Indian Ocean creates unique environmental conditions that can strongly influence biological processes. We investigated protist communities across a mesoscale meander of the Subtropical Front within the Southern Indian Ocean. 18S V9 rDNA metabarcoding suggests a diverse protist community in which the dinoflagellates and parasitic Syndiniales were abundant. Diversity was highest in frontal waters of the mesoscale meander, with differences in community structure inside and outside the meander. While the overall community was dominated by mixotrophic taxa, the frontal boundary of the meander had increased abundances of heterotrophic taxa, with potential implications for net atmospheric CO 2 drawdown. Pulse amplitude modulated (PAM) fluorimetry revealed significant differences in the photophysiology of phytoplankton communities inside and outside the meander. By using single‐cell PAM microscopy, we identified physiological differences between dinoflagellate and coccolithophore taxa, which may have contributed to changes in photophysiology observed at community level. Overall, our results demonstrate that frontal areas have a strong impact on the composition of protist communities in the Southern Ocean with important implications for understanding biological processes in this region. |
author2 |
H2020 European Research Council Leverhulme Trust National Science Foundation Natural Environment Research Council |
format |
Article in Journal/Newspaper |
author |
Sturm, Daniela de Vries, Joost Balch, William M. Wheeler, Glen Brownlee, Colin |
spellingShingle |
Sturm, Daniela de Vries, Joost Balch, William M. Wheeler, Glen Brownlee, Colin Mesoscale oceanographic meanders influence protist community function and structure in the southern Indian Ocean |
author_facet |
Sturm, Daniela de Vries, Joost Balch, William M. Wheeler, Glen Brownlee, Colin |
author_sort |
Sturm, Daniela |
title |
Mesoscale oceanographic meanders influence protist community function and structure in the southern Indian Ocean |
title_short |
Mesoscale oceanographic meanders influence protist community function and structure in the southern Indian Ocean |
title_full |
Mesoscale oceanographic meanders influence protist community function and structure in the southern Indian Ocean |
title_fullStr |
Mesoscale oceanographic meanders influence protist community function and structure in the southern Indian Ocean |
title_full_unstemmed |
Mesoscale oceanographic meanders influence protist community function and structure in the southern Indian Ocean |
title_sort |
mesoscale oceanographic meanders influence protist community function and structure in the southern indian ocean |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1111/1462-2920.16500 https://sfamjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1462-2920.16500 |
geographic |
Indian Southern Ocean |
geographic_facet |
Indian Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Environmental Microbiology volume 25, issue 12, page 3161-3179 ISSN 1462-2912 1462-2920 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/1462-2920.16500 |
container_title |
Environmental Microbiology |
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25 |
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12 |
container_start_page |
3161 |
op_container_end_page |
3179 |
_version_ |
1800738722769010688 |