Pigment composition and photoprotection of Arctic sea ice algae during spring
International audience From the beginning of spring to the melt period, ice algae in the bottom of Arctic sea ice experience a large irradiance range, varying from <0.1% up to 25 or 30% of the incoming visible radiation. The increase in spring is usually rapid, with a varying photoacclimative res...
Published in: | Marine Ecology Progress Series |
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Online Access: | https://doi.org/10.3354/meps12398 https://hal.archives-ouvertes.fr/hal-02323832/file/2017-MEPS-Galindo%20et%20al.pdf https://hal.archives-ouvertes.fr/hal-02323832 |
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fttriple:oai:gotriple.eu:10670/1.sxc40f 2023-05-15T15:00:04+02:00 Pigment composition and photoprotection of Arctic sea ice algae during spring Galindo, Virginie Gosselin, Michel Lavaud, Johann Mundy, C, Else, Brent Ehn, Jens Babin, Marcel Rysgaard, Søren University of Manitoba Winnipeg Institut des Sciences de la MER de Rimouski (ISMER) Université du Québec à Rimouski (UQAR) Takuvik Joint International Laboratory ULAVAL-CNRS Université Laval Québec (ULaval)-Centre National de la Recherche Scientifique (CNRS) Department of Geography Calgary University of Calgary Greenland Institute for Natural Resources (GINR) 2017-12-27 https://doi.org/10.3354/meps12398 https://hal.archives-ouvertes.fr/hal-02323832/file/2017-MEPS-Galindo%20et%20al.pdf https://hal.archives-ouvertes.fr/hal-02323832 en eng HAL CCSD Inter Research hal-02323832 doi:10.3354/meps12398 10670/1.sxc40f https://hal.archives-ouvertes.fr/hal-02323832/file/2017-MEPS-Galindo%20et%20al.pdf https://hal.archives-ouvertes.fr/hal-02323832 other Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series Marine Ecology Progress Series, Inter Research, 2017, ⟨10.3354/meps12398⟩ geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2017 fttriple https://doi.org/10.3354/meps12398 2023-01-22T16:47:39Z International audience From the beginning of spring to the melt period, ice algae in the bottom of Arctic sea ice experience a large irradiance range, varying from <0.1% up to 25 or 30% of the incoming visible radiation. The increase in spring is usually rapid, with a varying photoacclimative response by bottom ice algae to protect themselves against excess light, such as changes in cellular pigment composition. This study focused on the temporal variation in pigment composition of bottom ice algae under 2 contrasting snow depths (thin and thick) during spring. Controlled experiments were also carried out to investigate the photoprotective capacity of ice algae to relatively high irradiances during a short-term period (<6 h). Bottom ice algae were able to photoacclimate rapidly and effectively to irradiance ranging from 10 to 100 umol photons m-2 s-1. However, we observed contrasting responses in photoacclimation depending on the ice algal community composition and their light history. Our experimental results suggest that the xanthophyll cycle (diadinoxanthin to diatoxanthin conversion) and D1-protein recycling play an important role in stabilizing photoprotection in ice algae. In addition, bottom ice algae likely employed a ‘cellular light-exposure memory’ strategy in order to improve their photoacclimative response to changing light exposure. According to our data, this process could be maintained over at least 2 wk. Hence, ice algae may be more resilient to varying light conditions than previously thought, and may be well-adapted for the expected future light regime changes associated with variability in snow and sea ice cover. Article in Journal/Newspaper Arctic ice algae Sea ice Unknown Arctic Marine Ecology Progress Series 585 49 69 |
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Open Polar |
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Unknown |
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language |
English |
topic |
geo envir |
spellingShingle |
geo envir Galindo, Virginie Gosselin, Michel Lavaud, Johann Mundy, C, Else, Brent Ehn, Jens Babin, Marcel Rysgaard, Søren Pigment composition and photoprotection of Arctic sea ice algae during spring |
topic_facet |
geo envir |
description |
International audience From the beginning of spring to the melt period, ice algae in the bottom of Arctic sea ice experience a large irradiance range, varying from <0.1% up to 25 or 30% of the incoming visible radiation. The increase in spring is usually rapid, with a varying photoacclimative response by bottom ice algae to protect themselves against excess light, such as changes in cellular pigment composition. This study focused on the temporal variation in pigment composition of bottom ice algae under 2 contrasting snow depths (thin and thick) during spring. Controlled experiments were also carried out to investigate the photoprotective capacity of ice algae to relatively high irradiances during a short-term period (<6 h). Bottom ice algae were able to photoacclimate rapidly and effectively to irradiance ranging from 10 to 100 umol photons m-2 s-1. However, we observed contrasting responses in photoacclimation depending on the ice algal community composition and their light history. Our experimental results suggest that the xanthophyll cycle (diadinoxanthin to diatoxanthin conversion) and D1-protein recycling play an important role in stabilizing photoprotection in ice algae. In addition, bottom ice algae likely employed a ‘cellular light-exposure memory’ strategy in order to improve their photoacclimative response to changing light exposure. According to our data, this process could be maintained over at least 2 wk. Hence, ice algae may be more resilient to varying light conditions than previously thought, and may be well-adapted for the expected future light regime changes associated with variability in snow and sea ice cover. |
author2 |
University of Manitoba Winnipeg Institut des Sciences de la MER de Rimouski (ISMER) Université du Québec à Rimouski (UQAR) Takuvik Joint International Laboratory ULAVAL-CNRS Université Laval Québec (ULaval)-Centre National de la Recherche Scientifique (CNRS) Department of Geography Calgary University of Calgary Greenland Institute for Natural Resources (GINR) |
format |
Article in Journal/Newspaper |
author |
Galindo, Virginie Gosselin, Michel Lavaud, Johann Mundy, C, Else, Brent Ehn, Jens Babin, Marcel Rysgaard, Søren |
author_facet |
Galindo, Virginie Gosselin, Michel Lavaud, Johann Mundy, C, Else, Brent Ehn, Jens Babin, Marcel Rysgaard, Søren |
author_sort |
Galindo, Virginie |
title |
Pigment composition and photoprotection of Arctic sea ice algae during spring |
title_short |
Pigment composition and photoprotection of Arctic sea ice algae during spring |
title_full |
Pigment composition and photoprotection of Arctic sea ice algae during spring |
title_fullStr |
Pigment composition and photoprotection of Arctic sea ice algae during spring |
title_full_unstemmed |
Pigment composition and photoprotection of Arctic sea ice algae during spring |
title_sort |
pigment composition and photoprotection of arctic sea ice algae during spring |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://doi.org/10.3354/meps12398 https://hal.archives-ouvertes.fr/hal-02323832/file/2017-MEPS-Galindo%20et%20al.pdf https://hal.archives-ouvertes.fr/hal-02323832 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic ice algae Sea ice |
genre_facet |
Arctic ice algae Sea ice |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series Marine Ecology Progress Series, Inter Research, 2017, ⟨10.3354/meps12398⟩ |
op_relation |
hal-02323832 doi:10.3354/meps12398 10670/1.sxc40f https://hal.archives-ouvertes.fr/hal-02323832/file/2017-MEPS-Galindo%20et%20al.pdf https://hal.archives-ouvertes.fr/hal-02323832 |
op_rights |
other |
op_doi |
https://doi.org/10.3354/meps12398 |
container_title |
Marine Ecology Progress Series |
container_volume |
585 |
container_start_page |
49 |
op_container_end_page |
69 |
_version_ |
1766332177927110656 |