Higher sensitivity towards light stress and ocean acidification in an Arctic sea‐ice‐associated diatom compared to a pelagic diatom
Summary Thalassiosira hyalina and Nitzschia frigida are important members of Arctic pelagic and sympagic (sea‐ice‐associated) diatom communities. We investigated the effects of light stress (shift from 20 to 380 µmol photons m −2 s −1 , resembling upwelling or ice break‐up) under contemporary and fu...
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Online Access: | http://dx.doi.org/10.1111/nph.16501 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fnph.16501 https://onlinelibrary.wiley.com/doi/pdf/10.1111/nph.16501 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/nph.16501 https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.16501 |
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crwiley:10.1111/nph.16501 2024-09-15T18:28:14+00:00 Higher sensitivity towards light stress and ocean acidification in an Arctic sea‐ice‐associated diatom compared to a pelagic diatom Kvernvik, Ane C. Rokitta, Sebastian D. Leu, Eva Harms, Lars Gabrielsen, Tove M. Rost, Björn Hoppe, Clara J. M. Norges Forskningsråd 2020 http://dx.doi.org/10.1111/nph.16501 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fnph.16501 https://onlinelibrary.wiley.com/doi/pdf/10.1111/nph.16501 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/nph.16501 https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.16501 en eng Wiley http://creativecommons.org/licenses/by/4.0/ New Phytologist volume 226, issue 6, page 1708-1724 ISSN 0028-646X 1469-8137 journal-article 2020 crwiley https://doi.org/10.1111/nph.16501 2024-08-06T04:13:27Z Summary Thalassiosira hyalina and Nitzschia frigida are important members of Arctic pelagic and sympagic (sea‐ice‐associated) diatom communities. We investigated the effects of light stress (shift from 20 to 380 µmol photons m −2 s −1 , resembling upwelling or ice break‐up) under contemporary and future p CO 2 (400 vs 1000 µatm). The responses in growth, elemental composition, pigmentation and photophysiology were followed over 120 h and are discussed together with underlying gene expression patterns. Stress response and subsequent re‐acclimation were efficiently facilitated by T. hyalina , which showed only moderate changes in photophysiology and elemental composition, and thrived under high light after 120 h. In N. frigida , photochemical damage and oxidative stress appeared to outweigh cellular defenses, causing dysfunctional photophysiology and reduced growth. p CO 2 alone did not specifically influence gene expression, but amplified the transcriptomic reactions to light stress, indicating that p CO 2 affects metabolic equilibria rather than sensitive genes. Large differences in acclimation capacities towards high light and high p CO 2 between T. hyalina and N. frigida indicate species‐specific mechanisms in coping with the two stressors, which may reflect their respective ecological niches. This could potentially alter the balance between sympagic and pelagic primary production in a future Arctic. Article in Journal/Newspaper Ocean acidification Sea ice Wiley Online Library New Phytologist 226 6 1708 1724 |
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Wiley Online Library |
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English |
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Summary Thalassiosira hyalina and Nitzschia frigida are important members of Arctic pelagic and sympagic (sea‐ice‐associated) diatom communities. We investigated the effects of light stress (shift from 20 to 380 µmol photons m −2 s −1 , resembling upwelling or ice break‐up) under contemporary and future p CO 2 (400 vs 1000 µatm). The responses in growth, elemental composition, pigmentation and photophysiology were followed over 120 h and are discussed together with underlying gene expression patterns. Stress response and subsequent re‐acclimation were efficiently facilitated by T. hyalina , which showed only moderate changes in photophysiology and elemental composition, and thrived under high light after 120 h. In N. frigida , photochemical damage and oxidative stress appeared to outweigh cellular defenses, causing dysfunctional photophysiology and reduced growth. p CO 2 alone did not specifically influence gene expression, but amplified the transcriptomic reactions to light stress, indicating that p CO 2 affects metabolic equilibria rather than sensitive genes. Large differences in acclimation capacities towards high light and high p CO 2 between T. hyalina and N. frigida indicate species‐specific mechanisms in coping with the two stressors, which may reflect their respective ecological niches. This could potentially alter the balance between sympagic and pelagic primary production in a future Arctic. |
author2 |
Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Kvernvik, Ane C. Rokitta, Sebastian D. Leu, Eva Harms, Lars Gabrielsen, Tove M. Rost, Björn Hoppe, Clara J. M. |
spellingShingle |
Kvernvik, Ane C. Rokitta, Sebastian D. Leu, Eva Harms, Lars Gabrielsen, Tove M. Rost, Björn Hoppe, Clara J. M. Higher sensitivity towards light stress and ocean acidification in an Arctic sea‐ice‐associated diatom compared to a pelagic diatom |
author_facet |
Kvernvik, Ane C. Rokitta, Sebastian D. Leu, Eva Harms, Lars Gabrielsen, Tove M. Rost, Björn Hoppe, Clara J. M. |
author_sort |
Kvernvik, Ane C. |
title |
Higher sensitivity towards light stress and ocean acidification in an Arctic sea‐ice‐associated diatom compared to a pelagic diatom |
title_short |
Higher sensitivity towards light stress and ocean acidification in an Arctic sea‐ice‐associated diatom compared to a pelagic diatom |
title_full |
Higher sensitivity towards light stress and ocean acidification in an Arctic sea‐ice‐associated diatom compared to a pelagic diatom |
title_fullStr |
Higher sensitivity towards light stress and ocean acidification in an Arctic sea‐ice‐associated diatom compared to a pelagic diatom |
title_full_unstemmed |
Higher sensitivity towards light stress and ocean acidification in an Arctic sea‐ice‐associated diatom compared to a pelagic diatom |
title_sort |
higher sensitivity towards light stress and ocean acidification in an arctic sea‐ice‐associated diatom compared to a pelagic diatom |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/nph.16501 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fnph.16501 https://onlinelibrary.wiley.com/doi/pdf/10.1111/nph.16501 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/nph.16501 https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.16501 |
genre |
Ocean acidification Sea ice |
genre_facet |
Ocean acidification Sea ice |
op_source |
New Phytologist volume 226, issue 6, page 1708-1724 ISSN 0028-646X 1469-8137 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/nph.16501 |
container_title |
New Phytologist |
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226 |
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6 |
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1708 |
op_container_end_page |
1724 |
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1810469573043945472 |