Effect of dissolved iron (II) and temperature on growth of the Southern Ocean phytoplankton species Fragilariopsis cylindrus and Phaeocystis antarctica
Low bioavailability of the vital element iron (Fe) limits primary production in large regions of the Southern Ocean, thus impacting phytoplankton community structures. Primary productivity seems to be particularly sensitive to the reduced form of iron (Fe(II)), which is thought to be the most readil...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/371084 2024-04-28T07:57:58+00:00 Effect of dissolved iron (II) and temperature on growth of the Southern Ocean phytoplankton species Fragilariopsis cylindrus and Phaeocystis antarctica Aflenzer, Helene Hoffmann, Linn J. Holmes, Thomas T.M. Wuttig, Kathrin Genovese, Cristina Bowie, Andrew Ross 2023-11 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/371084 https://dipot.ulb.ac.be/dspace/bitstream/2013/371084/1/doi_354728.pdf en eng uri/info:doi/10.1007/s00300-023-03191-z uri/info:scp/85172005066 https://dipot.ulb.ac.be/dspace/bitstream/2013/371084/1/doi_354728.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/371084 1 full-text file(s): info:eu-repo/semantics/openAccess Polar biology, 46 (11 Sciences bio-médicales et agricoles Antarctic phytoplankton Climate change Iron bioavailability Ocean warming Phytoplankton species composition info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2023 ftunivbruxelles 2024-04-10T00:10:31Z Low bioavailability of the vital element iron (Fe) limits primary production in large regions of the Southern Ocean, thus impacting phytoplankton community structures. Primary productivity seems to be particularly sensitive to the reduced form of iron (Fe(II)), which is thought to be the most readily bioavailable redox form of Fe in the ocean. Here, we investigated the impact of temperature (3 °C, 5 °C and 7 °C) and Fe(II) additions (+ 5 nM) on growth of two Southern Ocean phytoplankton species Fragilariopsis cylindrus and Phaeocystis antarctica in coastal and open ocean water. At all tested temperatures, growth rates of P. antarctica were significantly higher with added iron, compared to the treatments without added iron in both waters. Temperature only had a significant effect on the growth rate of this species when it was raised to 7 °C in all treatments. For F. cylindrus, growth rates only significantly increased with iron addition at 7 °C in both water types. Temperature did not affect the growth rate of F. cylindrus except for a significant reduction without iron addition at 7 °C in coastal water. These results highlight the complex interactions between Fe bioavailability and temperature on Southern Ocean phytoplankton growth. Thus, certain Southern Ocean phytoplankton species may have higher growth rates in regions of the ocean that will warm the most and possibly experience greater Fe supply under future climate conditions, such as coastal regions. This may result in changes in phytoplankton community structures with implications for carbon sequestration efficiency under future climate conditions. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper Antarc* Antarctic Antarctica Polar Biology Southern Ocean DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Sciences bio-médicales et agricoles Antarctic phytoplankton Climate change Iron bioavailability Ocean warming Phytoplankton species composition |
spellingShingle |
Sciences bio-médicales et agricoles Antarctic phytoplankton Climate change Iron bioavailability Ocean warming Phytoplankton species composition Aflenzer, Helene Hoffmann, Linn J. Holmes, Thomas T.M. Wuttig, Kathrin Genovese, Cristina Bowie, Andrew Ross Effect of dissolved iron (II) and temperature on growth of the Southern Ocean phytoplankton species Fragilariopsis cylindrus and Phaeocystis antarctica |
topic_facet |
Sciences bio-médicales et agricoles Antarctic phytoplankton Climate change Iron bioavailability Ocean warming Phytoplankton species composition |
description |
Low bioavailability of the vital element iron (Fe) limits primary production in large regions of the Southern Ocean, thus impacting phytoplankton community structures. Primary productivity seems to be particularly sensitive to the reduced form of iron (Fe(II)), which is thought to be the most readily bioavailable redox form of Fe in the ocean. Here, we investigated the impact of temperature (3 °C, 5 °C and 7 °C) and Fe(II) additions (+ 5 nM) on growth of two Southern Ocean phytoplankton species Fragilariopsis cylindrus and Phaeocystis antarctica in coastal and open ocean water. At all tested temperatures, growth rates of P. antarctica were significantly higher with added iron, compared to the treatments without added iron in both waters. Temperature only had a significant effect on the growth rate of this species when it was raised to 7 °C in all treatments. For F. cylindrus, growth rates only significantly increased with iron addition at 7 °C in both water types. Temperature did not affect the growth rate of F. cylindrus except for a significant reduction without iron addition at 7 °C in coastal water. These results highlight the complex interactions between Fe bioavailability and temperature on Southern Ocean phytoplankton growth. Thus, certain Southern Ocean phytoplankton species may have higher growth rates in regions of the ocean that will warm the most and possibly experience greater Fe supply under future climate conditions, such as coastal regions. This may result in changes in phytoplankton community structures with implications for carbon sequestration efficiency under future climate conditions. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Aflenzer, Helene Hoffmann, Linn J. Holmes, Thomas T.M. Wuttig, Kathrin Genovese, Cristina Bowie, Andrew Ross |
author_facet |
Aflenzer, Helene Hoffmann, Linn J. Holmes, Thomas T.M. Wuttig, Kathrin Genovese, Cristina Bowie, Andrew Ross |
author_sort |
Aflenzer, Helene |
title |
Effect of dissolved iron (II) and temperature on growth of the Southern Ocean phytoplankton species Fragilariopsis cylindrus and Phaeocystis antarctica |
title_short |
Effect of dissolved iron (II) and temperature on growth of the Southern Ocean phytoplankton species Fragilariopsis cylindrus and Phaeocystis antarctica |
title_full |
Effect of dissolved iron (II) and temperature on growth of the Southern Ocean phytoplankton species Fragilariopsis cylindrus and Phaeocystis antarctica |
title_fullStr |
Effect of dissolved iron (II) and temperature on growth of the Southern Ocean phytoplankton species Fragilariopsis cylindrus and Phaeocystis antarctica |
title_full_unstemmed |
Effect of dissolved iron (II) and temperature on growth of the Southern Ocean phytoplankton species Fragilariopsis cylindrus and Phaeocystis antarctica |
title_sort |
effect of dissolved iron (ii) and temperature on growth of the southern ocean phytoplankton species fragilariopsis cylindrus and phaeocystis antarctica |
publishDate |
2023 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/371084 https://dipot.ulb.ac.be/dspace/bitstream/2013/371084/1/doi_354728.pdf |
genre |
Antarc* Antarctic Antarctica Polar Biology Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Polar Biology Southern Ocean |
op_source |
Polar biology, 46 (11 |
op_relation |
uri/info:doi/10.1007/s00300-023-03191-z uri/info:scp/85172005066 https://dipot.ulb.ac.be/dspace/bitstream/2013/371084/1/doi_354728.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/371084 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/openAccess |
_version_ |
1797591225665060864 |