In contrast to diatoms, cryptophytes are susceptible to iron limitation, but not to ocean acidification
Abstract Previous field studies in the Southern Ocean (SO) indicated an increased occurrence and dominance of cryptophytes over diatoms due to climate change. To gain a better mechanistic understanding of how the two ecologically important SO phytoplankton groups cope with ocean acidification (OA) a...
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crwiley:10.1111/ppl.13614 2023-12-03T10:13:16+01:00 In contrast to diatoms, cryptophytes are susceptible to iron limitation, but not to ocean acidification Camoying, Marianne G. Thoms, Silke Geuer, Jana K. Koch, Boris P. Bischof, Kai Trimborn, Scarlett Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Katholischer Akademischer Ausländer-Dienst 2022 http://dx.doi.org/10.1111/ppl.13614 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ppl.13614 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/ppl.13614 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Physiologia Plantarum volume 174, issue 1 ISSN 0031-9317 1399-3054 Cell Biology Plant Science Genetics General Medicine Physiology journal-article 2022 crwiley https://doi.org/10.1111/ppl.13614 2023-11-09T14:19:05Z Abstract Previous field studies in the Southern Ocean (SO) indicated an increased occurrence and dominance of cryptophytes over diatoms due to climate change. To gain a better mechanistic understanding of how the two ecologically important SO phytoplankton groups cope with ocean acidification (OA) and iron (Fe) availability, we chose two common representatives of Antarctic waters, the cryptophyte Geminigera cryophila and the diatom Pseudo‐nitzschia subcurvata . Both species were grown at 2°C under different p CO 2 (400 vs. 900 μatm) and Fe (0.6 vs. 1.2 nM) conditions. For P. subcurvata , an additional high p CO 2 level was applied (1400 μatm). At ambient p CO 2 under low Fe supply, growth of G. cryophila almost stopped while it remained unaffected in P. subcurvata . Under high Fe conditions, OA was not beneficial for P. subcurvata , but stimulated growth and carbon production of G. cryophila . Under low Fe supply, P. subcurvata coped much better with OA than the cryptophyte, but invested more energy into photoacclimation. Our study reveals that Fe limitation was detrimental for the growth of G. cryophila and suppressed the positive OA effect. The diatom was efficient in coping with low Fe, but was stressed by OA while both factors together strongly impacted its growth. The distinct physiological response of both species to OA and Fe limitation explains their occurrence in the field. Based on our results, Fe availability is an important modulator of OA effects on SO phytoplankton, with different implications on the occurrence of cryptophytes and diatoms in the future. Article in Journal/Newspaper Antarc* Antarctic Ocean acidification Southern Ocean Wiley Online Library (via Crossref) Antarctic Southern Ocean Physiologia Plantarum 174 1 |
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Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Cell Biology Plant Science Genetics General Medicine Physiology |
spellingShingle |
Cell Biology Plant Science Genetics General Medicine Physiology Camoying, Marianne G. Thoms, Silke Geuer, Jana K. Koch, Boris P. Bischof, Kai Trimborn, Scarlett In contrast to diatoms, cryptophytes are susceptible to iron limitation, but not to ocean acidification |
topic_facet |
Cell Biology Plant Science Genetics General Medicine Physiology |
description |
Abstract Previous field studies in the Southern Ocean (SO) indicated an increased occurrence and dominance of cryptophytes over diatoms due to climate change. To gain a better mechanistic understanding of how the two ecologically important SO phytoplankton groups cope with ocean acidification (OA) and iron (Fe) availability, we chose two common representatives of Antarctic waters, the cryptophyte Geminigera cryophila and the diatom Pseudo‐nitzschia subcurvata . Both species were grown at 2°C under different p CO 2 (400 vs. 900 μatm) and Fe (0.6 vs. 1.2 nM) conditions. For P. subcurvata , an additional high p CO 2 level was applied (1400 μatm). At ambient p CO 2 under low Fe supply, growth of G. cryophila almost stopped while it remained unaffected in P. subcurvata . Under high Fe conditions, OA was not beneficial for P. subcurvata , but stimulated growth and carbon production of G. cryophila . Under low Fe supply, P. subcurvata coped much better with OA than the cryptophyte, but invested more energy into photoacclimation. Our study reveals that Fe limitation was detrimental for the growth of G. cryophila and suppressed the positive OA effect. The diatom was efficient in coping with low Fe, but was stressed by OA while both factors together strongly impacted its growth. The distinct physiological response of both species to OA and Fe limitation explains their occurrence in the field. Based on our results, Fe availability is an important modulator of OA effects on SO phytoplankton, with different implications on the occurrence of cryptophytes and diatoms in the future. |
author2 |
Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Katholischer Akademischer Ausländer-Dienst |
format |
Article in Journal/Newspaper |
author |
Camoying, Marianne G. Thoms, Silke Geuer, Jana K. Koch, Boris P. Bischof, Kai Trimborn, Scarlett |
author_facet |
Camoying, Marianne G. Thoms, Silke Geuer, Jana K. Koch, Boris P. Bischof, Kai Trimborn, Scarlett |
author_sort |
Camoying, Marianne G. |
title |
In contrast to diatoms, cryptophytes are susceptible to iron limitation, but not to ocean acidification |
title_short |
In contrast to diatoms, cryptophytes are susceptible to iron limitation, but not to ocean acidification |
title_full |
In contrast to diatoms, cryptophytes are susceptible to iron limitation, but not to ocean acidification |
title_fullStr |
In contrast to diatoms, cryptophytes are susceptible to iron limitation, but not to ocean acidification |
title_full_unstemmed |
In contrast to diatoms, cryptophytes are susceptible to iron limitation, but not to ocean acidification |
title_sort |
in contrast to diatoms, cryptophytes are susceptible to iron limitation, but not to ocean acidification |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1111/ppl.13614 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ppl.13614 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/ppl.13614 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Ocean acidification Southern Ocean |
genre_facet |
Antarc* Antarctic Ocean acidification Southern Ocean |
op_source |
Physiologia Plantarum volume 174, issue 1 ISSN 0031-9317 1399-3054 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/ppl.13614 |
container_title |
Physiologia Plantarum |
container_volume |
174 |
container_issue |
1 |
_version_ |
1784259976041070592 |