Essential omega‐3 fatty acids are depleted in sea ice and pelagic algae of the Central Arctic Ocean
Abstract Microalgae are the main source of the omega‐3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), essential for the healthy development of most marine and terrestrial fauna including humans. Inverse correlations of algal EPA and DHA proportions (% of total fatty acids) w...
Published in: | Global Change Biology |
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Online Access: | http://dx.doi.org/10.1111/gcb.17090 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.17090 |
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crwiley:10.1111/gcb.17090 2024-06-02T08:01:02+00:00 Essential omega‐3 fatty acids are depleted in sea ice and pelagic algae of the Central Arctic Ocean Schmidt, Katrin Graeve, Martin Hoppe, Clara J. M. Torres‐Valdes, Sinhué Welteke, Nahid Whitmore, Laura M. Anhaus, Philipp Atkinson, Angus Belt, Simon T. Brenneis, Tina Campbell, Robert G. Castellani, Giulia Copeman, Louise A. Flores, Hauke Fong, Allison A. Hildebrandt, Nicole Kohlbach, Doreen Nielsen, Jens M. Parrish, Christopher C. Rad‐Menéndez, Cecilia Rokitta, Sebastian D. Tippenhauer, Sandra Zhuang, Yanpei Bundesministerium für Bildung und Forschung Directorate for STEM Education Natural Environment Research Council Norges Forskningsråd 2023 http://dx.doi.org/10.1111/gcb.17090 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.17090 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Global Change Biology volume 30, issue 1 ISSN 1354-1013 1365-2486 journal-article 2023 crwiley https://doi.org/10.1111/gcb.17090 2024-05-03T10:39:38Z Abstract Microalgae are the main source of the omega‐3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), essential for the healthy development of most marine and terrestrial fauna including humans. Inverse correlations of algal EPA and DHA proportions (% of total fatty acids) with temperature have led to suggestions of a warming‐induced decline in the global production of these biomolecules and an enhanced importance of high latitude organisms for their provision. The cold Arctic Ocean is a potential hotspot of EPA and DHA production, but consequences of global warming are unknown. Here, we combine a full‐seasonal EPA and DHA dataset from the Central Arctic Ocean (CAO), with results from 13 previous field studies and 32 cultured algal strains to examine five potential climate change effects; ice algae loss, community shifts, increase in light, nutrients, and temperature. The algal EPA and DHA proportions were lower in the ice‐covered CAO than in warmer peripheral shelf seas, which indicates that the paradigm of an inverse correlation of EPA and DHA proportions with temperature may not hold in the Arctic. We found no systematic differences in the summed EPA and DHA proportions of sea ice versus pelagic algae, and in diatoms versus non‐diatoms. Overall, the algal EPA and DHA proportions varied up to four‐fold seasonally and 10‐fold regionally, pointing to strong light and nutrient limitations in the CAO. Where these limitations ease in a warming Arctic, EPA and DHA proportions are likely to increase alongside increasing primary production, with nutritional benefits for a non‐ice‐associated food web. Article in Journal/Newspaper Arctic Arctic Ocean Climate change Global warming ice algae Sea ice Wiley Online Library Arctic Arctic Ocean Global Change Biology 30 1 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Microalgae are the main source of the omega‐3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), essential for the healthy development of most marine and terrestrial fauna including humans. Inverse correlations of algal EPA and DHA proportions (% of total fatty acids) with temperature have led to suggestions of a warming‐induced decline in the global production of these biomolecules and an enhanced importance of high latitude organisms for their provision. The cold Arctic Ocean is a potential hotspot of EPA and DHA production, but consequences of global warming are unknown. Here, we combine a full‐seasonal EPA and DHA dataset from the Central Arctic Ocean (CAO), with results from 13 previous field studies and 32 cultured algal strains to examine five potential climate change effects; ice algae loss, community shifts, increase in light, nutrients, and temperature. The algal EPA and DHA proportions were lower in the ice‐covered CAO than in warmer peripheral shelf seas, which indicates that the paradigm of an inverse correlation of EPA and DHA proportions with temperature may not hold in the Arctic. We found no systematic differences in the summed EPA and DHA proportions of sea ice versus pelagic algae, and in diatoms versus non‐diatoms. Overall, the algal EPA and DHA proportions varied up to four‐fold seasonally and 10‐fold regionally, pointing to strong light and nutrient limitations in the CAO. Where these limitations ease in a warming Arctic, EPA and DHA proportions are likely to increase alongside increasing primary production, with nutritional benefits for a non‐ice‐associated food web. |
author2 |
Bundesministerium für Bildung und Forschung Directorate for STEM Education Natural Environment Research Council Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Schmidt, Katrin Graeve, Martin Hoppe, Clara J. M. Torres‐Valdes, Sinhué Welteke, Nahid Whitmore, Laura M. Anhaus, Philipp Atkinson, Angus Belt, Simon T. Brenneis, Tina Campbell, Robert G. Castellani, Giulia Copeman, Louise A. Flores, Hauke Fong, Allison A. Hildebrandt, Nicole Kohlbach, Doreen Nielsen, Jens M. Parrish, Christopher C. Rad‐Menéndez, Cecilia Rokitta, Sebastian D. Tippenhauer, Sandra Zhuang, Yanpei |
spellingShingle |
Schmidt, Katrin Graeve, Martin Hoppe, Clara J. M. Torres‐Valdes, Sinhué Welteke, Nahid Whitmore, Laura M. Anhaus, Philipp Atkinson, Angus Belt, Simon T. Brenneis, Tina Campbell, Robert G. Castellani, Giulia Copeman, Louise A. Flores, Hauke Fong, Allison A. Hildebrandt, Nicole Kohlbach, Doreen Nielsen, Jens M. Parrish, Christopher C. Rad‐Menéndez, Cecilia Rokitta, Sebastian D. Tippenhauer, Sandra Zhuang, Yanpei Essential omega‐3 fatty acids are depleted in sea ice and pelagic algae of the Central Arctic Ocean |
author_facet |
Schmidt, Katrin Graeve, Martin Hoppe, Clara J. M. Torres‐Valdes, Sinhué Welteke, Nahid Whitmore, Laura M. Anhaus, Philipp Atkinson, Angus Belt, Simon T. Brenneis, Tina Campbell, Robert G. Castellani, Giulia Copeman, Louise A. Flores, Hauke Fong, Allison A. Hildebrandt, Nicole Kohlbach, Doreen Nielsen, Jens M. Parrish, Christopher C. Rad‐Menéndez, Cecilia Rokitta, Sebastian D. Tippenhauer, Sandra Zhuang, Yanpei |
author_sort |
Schmidt, Katrin |
title |
Essential omega‐3 fatty acids are depleted in sea ice and pelagic algae of the Central Arctic Ocean |
title_short |
Essential omega‐3 fatty acids are depleted in sea ice and pelagic algae of the Central Arctic Ocean |
title_full |
Essential omega‐3 fatty acids are depleted in sea ice and pelagic algae of the Central Arctic Ocean |
title_fullStr |
Essential omega‐3 fatty acids are depleted in sea ice and pelagic algae of the Central Arctic Ocean |
title_full_unstemmed |
Essential omega‐3 fatty acids are depleted in sea ice and pelagic algae of the Central Arctic Ocean |
title_sort |
essential omega‐3 fatty acids are depleted in sea ice and pelagic algae of the central arctic ocean |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1111/gcb.17090 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.17090 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Climate change Global warming ice algae Sea ice |
genre_facet |
Arctic Arctic Ocean Climate change Global warming ice algae Sea ice |
op_source |
Global Change Biology volume 30, issue 1 ISSN 1354-1013 1365-2486 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/gcb.17090 |
container_title |
Global Change Biology |
container_volume |
30 |
container_issue |
1 |
_version_ |
1800745275431583744 |