Interactive effects of iron and temperature on the growth of Fragilariopsis cylindrus
Abstract Iron and temperature are important drivers controlling phytoplankton growth in the Southern Ocean (SO). Most studies examining phytoplankton responses to these variables consider them independently, testing responses to changing temperature under constant iron and vice versa. Consequently,...
Published in: | Limnology and Oceanography Letters |
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Online Access: | http://dx.doi.org/10.1002/lol2.10158 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flol2.10158 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10158 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lol2.10158 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10158 |
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crwiley:10.1002/lol2.10158 2024-09-15T18:37:11+00:00 Interactive effects of iron and temperature on the growth of Fragilariopsis cylindrus Jabre, Loay Bertrand, Erin M. Natural Sciences and Engineering Research Council of Canada Simons Foundation 2020 http://dx.doi.org/10.1002/lol2.10158 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flol2.10158 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10158 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lol2.10158 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10158 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Limnology and Oceanography Letters volume 5, issue 5, page 363-370 ISSN 2378-2242 2378-2242 journal-article 2020 crwiley https://doi.org/10.1002/lol2.10158 2024-08-06T04:15:47Z Abstract Iron and temperature are important drivers controlling phytoplankton growth in the Southern Ocean (SO). Most studies examining phytoplankton responses to these variables consider them independently, testing responses to changing temperature under constant iron and vice versa. Consequently, we lack a phenomenological and mechanistic understanding of how concurrent changes in these variables influence primary productivity. Here, we used a matrix of three temperatures and eight iron levels to examine changes in growth rate, photophysiology, and size in Fragilariopsis cylindrus . Temperature and iron interactively influenced growth; warming decreased iron demand, allowing cells to maintain half‐maximal growth rate at lower iron concentrations. We also observed possible mechanisms underpinning this phenomenon: warming increased light‐harvesting cross section and reduced cell size, thereby increasing light energy availability and iron uptake efficiency. These results suggest that interactive iron‐warming effects could lead to larger increases in SO phytoplankton growth than those currently predicted by marine ecosystem models. Article in Journal/Newspaper Southern Ocean Wiley Online Library Limnology and Oceanography Letters 5 5 363 370 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Iron and temperature are important drivers controlling phytoplankton growth in the Southern Ocean (SO). Most studies examining phytoplankton responses to these variables consider them independently, testing responses to changing temperature under constant iron and vice versa. Consequently, we lack a phenomenological and mechanistic understanding of how concurrent changes in these variables influence primary productivity. Here, we used a matrix of three temperatures and eight iron levels to examine changes in growth rate, photophysiology, and size in Fragilariopsis cylindrus . Temperature and iron interactively influenced growth; warming decreased iron demand, allowing cells to maintain half‐maximal growth rate at lower iron concentrations. We also observed possible mechanisms underpinning this phenomenon: warming increased light‐harvesting cross section and reduced cell size, thereby increasing light energy availability and iron uptake efficiency. These results suggest that interactive iron‐warming effects could lead to larger increases in SO phytoplankton growth than those currently predicted by marine ecosystem models. |
author2 |
Natural Sciences and Engineering Research Council of Canada Simons Foundation |
format |
Article in Journal/Newspaper |
author |
Jabre, Loay Bertrand, Erin M. |
spellingShingle |
Jabre, Loay Bertrand, Erin M. Interactive effects of iron and temperature on the growth of Fragilariopsis cylindrus |
author_facet |
Jabre, Loay Bertrand, Erin M. |
author_sort |
Jabre, Loay |
title |
Interactive effects of iron and temperature on the growth of Fragilariopsis cylindrus |
title_short |
Interactive effects of iron and temperature on the growth of Fragilariopsis cylindrus |
title_full |
Interactive effects of iron and temperature on the growth of Fragilariopsis cylindrus |
title_fullStr |
Interactive effects of iron and temperature on the growth of Fragilariopsis cylindrus |
title_full_unstemmed |
Interactive effects of iron and temperature on the growth of Fragilariopsis cylindrus |
title_sort |
interactive effects of iron and temperature on the growth of fragilariopsis cylindrus |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1002/lol2.10158 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flol2.10158 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10158 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lol2.10158 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10158 |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Limnology and Oceanography Letters volume 5, issue 5, page 363-370 ISSN 2378-2242 2378-2242 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/lol2.10158 |
container_title |
Limnology and Oceanography Letters |
container_volume |
5 |
container_issue |
5 |
container_start_page |
363 |
op_container_end_page |
370 |
_version_ |
1810481524442660864 |