Contrasting nonphotochemical quenching patterns under high light and darkness aligns with light niche occupancy in Arctic diatoms
Abstract Over the seasons, Arctic diatom species occupy shifting habitats defined by contrasting light climates, constrained by snow and ice cover dynamics interacting with extreme photoperiod and solar angle variations. How Arctic diatom photoadaptation strategies differ across their heterogeneous...
Published in: | Limnology and Oceanography |
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crwiley:10.1002/lno.11587 2024-09-30T14:29:10+00:00 Contrasting nonphotochemical quenching patterns under high light and darkness aligns with light niche occupancy in Arctic diatoms Croteau, Dany Guérin, Sébastien Bruyant, Flavienne Ferland, Joannie Campbell, Douglas A. Babin, Marcel Lavaud, Johann Canada Excellence Research Chairs, Government of Canada Natural Sciences and Engineering Research Council of Canada Canada First Research Excellence Fund 2020 http://dx.doi.org/10.1002/lno.11587 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11587 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11587 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11587 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Limnology and Oceanography volume 66, issue S1 ISSN 0024-3590 1939-5590 journal-article 2020 crwiley https://doi.org/10.1002/lno.11587 2024-09-05T05:05:26Z Abstract Over the seasons, Arctic diatom species occupy shifting habitats defined by contrasting light climates, constrained by snow and ice cover dynamics interacting with extreme photoperiod and solar angle variations. How Arctic diatom photoadaptation strategies differ across their heterogeneous light niches remains a poorly documented but crucial missing link to anticipate Arctic Ocean responses to shrinking sea‐ice and increasing light. To address this question, we selected five Arctic diatom species with diverse life traits, representative of distinct light niches across the seasonal light environment continuum: from snow‐covered dimly lit bottom ice to summer stratified waters. We studied their photoacclimation plasticity to two growth light levels and the subsequent responses of their nonphotochemical quenching (NPQ) and xanthophyll cycle to both dark incubations and light shifts. We deciphered NPQ and xanthophyll cycle tuning in darkness and their light‐dependent induction kinetics, which aligned with species' light niche occupancy. In ice‐related species, NPQ was sustained in darkness and its induction was more reactive to moderate light shifts. Open‐water species triggered strong NPQ induction in darkness and reached higher maximal NPQ under high light. Marginal ice zone species showed strong adaptation to light fluctuations with a dark response fine‐tuned depending upon light history. We argue these traits are anchored in diverging photoadaption strategies fostering Arctic diatom success in their respective light niches. Article in Journal/Newspaper Arctic Arctic Ocean Sea ice Wiley Online Library Arctic Arctic Ocean Limnology and Oceanography 66 S1 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Over the seasons, Arctic diatom species occupy shifting habitats defined by contrasting light climates, constrained by snow and ice cover dynamics interacting with extreme photoperiod and solar angle variations. How Arctic diatom photoadaptation strategies differ across their heterogeneous light niches remains a poorly documented but crucial missing link to anticipate Arctic Ocean responses to shrinking sea‐ice and increasing light. To address this question, we selected five Arctic diatom species with diverse life traits, representative of distinct light niches across the seasonal light environment continuum: from snow‐covered dimly lit bottom ice to summer stratified waters. We studied their photoacclimation plasticity to two growth light levels and the subsequent responses of their nonphotochemical quenching (NPQ) and xanthophyll cycle to both dark incubations and light shifts. We deciphered NPQ and xanthophyll cycle tuning in darkness and their light‐dependent induction kinetics, which aligned with species' light niche occupancy. In ice‐related species, NPQ was sustained in darkness and its induction was more reactive to moderate light shifts. Open‐water species triggered strong NPQ induction in darkness and reached higher maximal NPQ under high light. Marginal ice zone species showed strong adaptation to light fluctuations with a dark response fine‐tuned depending upon light history. We argue these traits are anchored in diverging photoadaption strategies fostering Arctic diatom success in their respective light niches. |
author2 |
Canada Excellence Research Chairs, Government of Canada Natural Sciences and Engineering Research Council of Canada Canada First Research Excellence Fund |
format |
Article in Journal/Newspaper |
author |
Croteau, Dany Guérin, Sébastien Bruyant, Flavienne Ferland, Joannie Campbell, Douglas A. Babin, Marcel Lavaud, Johann |
spellingShingle |
Croteau, Dany Guérin, Sébastien Bruyant, Flavienne Ferland, Joannie Campbell, Douglas A. Babin, Marcel Lavaud, Johann Contrasting nonphotochemical quenching patterns under high light and darkness aligns with light niche occupancy in Arctic diatoms |
author_facet |
Croteau, Dany Guérin, Sébastien Bruyant, Flavienne Ferland, Joannie Campbell, Douglas A. Babin, Marcel Lavaud, Johann |
author_sort |
Croteau, Dany |
title |
Contrasting nonphotochemical quenching patterns under high light and darkness aligns with light niche occupancy in Arctic diatoms |
title_short |
Contrasting nonphotochemical quenching patterns under high light and darkness aligns with light niche occupancy in Arctic diatoms |
title_full |
Contrasting nonphotochemical quenching patterns under high light and darkness aligns with light niche occupancy in Arctic diatoms |
title_fullStr |
Contrasting nonphotochemical quenching patterns under high light and darkness aligns with light niche occupancy in Arctic diatoms |
title_full_unstemmed |
Contrasting nonphotochemical quenching patterns under high light and darkness aligns with light niche occupancy in Arctic diatoms |
title_sort |
contrasting nonphotochemical quenching patterns under high light and darkness aligns with light niche occupancy in arctic diatoms |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1002/lno.11587 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11587 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11587 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11587 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Ocean Sea ice |
op_source |
Limnology and Oceanography volume 66, issue S1 ISSN 0024-3590 1939-5590 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/lno.11587 |
container_title |
Limnology and Oceanography |
container_volume |
66 |
container_issue |
S1 |
_version_ |
1811634560358678528 |