Shifts in growth light optima among diatom species support their succession during the spring bloom in the Arctic
Abstract Diatoms of the Arctic Ocean annually experience extreme changes of light environment linked to photoperiodic cycles and seasonal variations of the snow and sea‐ice cover extent and thickness which attenuate light penetration in the water column. Arctic diatom communities exploit this comple...
Published in: | Journal of Ecology |
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Online Access: | http://dx.doi.org/10.1111/1365-2745.13874 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2745.13874 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2745.13874 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2745.13874 |
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crwiley:10.1111/1365-2745.13874 2024-09-15T17:54:08+00:00 Shifts in growth light optima among diatom species support their succession during the spring bloom in the Arctic Croteau, Dany Lacour, Thomas Schiffrine, Nicolas Morin, Philippe‐Israël Forget, Marie‐Hélène Bruyant, Flavienne Ferland, Joannie Lafond, Augustin Campbell, Douglas A. Tremblay, Jean‐Éric Babin, Marcel Lavaud, Johann Canada First Research Excellence Fund Canada Foundation for Innovation Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada 2022 http://dx.doi.org/10.1111/1365-2745.13874 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2745.13874 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2745.13874 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2745.13874 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Journal of Ecology volume 110, issue 6, page 1356-1375 ISSN 0022-0477 1365-2745 journal-article 2022 crwiley https://doi.org/10.1111/1365-2745.13874 2024-09-05T05:04:26Z Abstract Diatoms of the Arctic Ocean annually experience extreme changes of light environment linked to photoperiodic cycles and seasonal variations of the snow and sea‐ice cover extent and thickness which attenuate light penetration in the water column. Arctic diatom communities exploit this complex seasonal dynamic through a well‐documented species succession during spring, beginning in sea‐ice and culminating in massive phytoplankton blooms underneath sea‐ice and in the marginal ice zone. The pattern of diatom taxa sequentially dominating this succession is relatively well conserved interannually, and taxonomic shifts seem to align with habitat transitions. To understand whether differential photoadaptation strategies among diatom taxa explain these recurring succession sequences, we coupled laboratory experiments with field work in Baffin Bay at 67.5°N. Based on field data, we selected five diatom species typical of different ecological niches and measured their growth rates under light intensity ranges representative of their natural habitats. To characterize their photoacclimative responses, we sampled pigments and total particulate carbon, and conducted 14 C‐uptake photosynthesis response curves and variable fluorescence measurements. We documented a gradient in species respective light intensity for maximal growth suggesting divergent light response plasticity, which for the most part align with species sequential dominance. Other photophysiological parameters supported this ecophysiological framing, although contrasts were always clear only between succession endmembers, Nitzschia frigida and Chaetoceros neogracilis . To validate that these photoacclimative responses are representative of in situ dynamics, we compared them to the chlorophyll a ‐specific light‐limited slope ( α *) and saturated rate of photosynthesis (), monitored in Baffin Bay on sea‐ice and planktonic communities. This complementary approach confirmed that unusual responses in α * and as a function of light history intensity are ... Article in Journal/Newspaper Arctic Ocean Baffin Bay Baffin Bay Baffin Phytoplankton Sea ice Wiley Online Library Journal of Ecology 110 6 1356 1375 |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Diatoms of the Arctic Ocean annually experience extreme changes of light environment linked to photoperiodic cycles and seasonal variations of the snow and sea‐ice cover extent and thickness which attenuate light penetration in the water column. Arctic diatom communities exploit this complex seasonal dynamic through a well‐documented species succession during spring, beginning in sea‐ice and culminating in massive phytoplankton blooms underneath sea‐ice and in the marginal ice zone. The pattern of diatom taxa sequentially dominating this succession is relatively well conserved interannually, and taxonomic shifts seem to align with habitat transitions. To understand whether differential photoadaptation strategies among diatom taxa explain these recurring succession sequences, we coupled laboratory experiments with field work in Baffin Bay at 67.5°N. Based on field data, we selected five diatom species typical of different ecological niches and measured their growth rates under light intensity ranges representative of their natural habitats. To characterize their photoacclimative responses, we sampled pigments and total particulate carbon, and conducted 14 C‐uptake photosynthesis response curves and variable fluorescence measurements. We documented a gradient in species respective light intensity for maximal growth suggesting divergent light response plasticity, which for the most part align with species sequential dominance. Other photophysiological parameters supported this ecophysiological framing, although contrasts were always clear only between succession endmembers, Nitzschia frigida and Chaetoceros neogracilis . To validate that these photoacclimative responses are representative of in situ dynamics, we compared them to the chlorophyll a ‐specific light‐limited slope ( α *) and saturated rate of photosynthesis (), monitored in Baffin Bay on sea‐ice and planktonic communities. This complementary approach confirmed that unusual responses in α * and as a function of light history intensity are ... |
author2 |
Canada First Research Excellence Fund Canada Foundation for Innovation Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Croteau, Dany Lacour, Thomas Schiffrine, Nicolas Morin, Philippe‐Israël Forget, Marie‐Hélène Bruyant, Flavienne Ferland, Joannie Lafond, Augustin Campbell, Douglas A. Tremblay, Jean‐Éric Babin, Marcel Lavaud, Johann |
spellingShingle |
Croteau, Dany Lacour, Thomas Schiffrine, Nicolas Morin, Philippe‐Israël Forget, Marie‐Hélène Bruyant, Flavienne Ferland, Joannie Lafond, Augustin Campbell, Douglas A. Tremblay, Jean‐Éric Babin, Marcel Lavaud, Johann Shifts in growth light optima among diatom species support their succession during the spring bloom in the Arctic |
author_facet |
Croteau, Dany Lacour, Thomas Schiffrine, Nicolas Morin, Philippe‐Israël Forget, Marie‐Hélène Bruyant, Flavienne Ferland, Joannie Lafond, Augustin Campbell, Douglas A. Tremblay, Jean‐Éric Babin, Marcel Lavaud, Johann |
author_sort |
Croteau, Dany |
title |
Shifts in growth light optima among diatom species support their succession during the spring bloom in the Arctic |
title_short |
Shifts in growth light optima among diatom species support their succession during the spring bloom in the Arctic |
title_full |
Shifts in growth light optima among diatom species support their succession during the spring bloom in the Arctic |
title_fullStr |
Shifts in growth light optima among diatom species support their succession during the spring bloom in the Arctic |
title_full_unstemmed |
Shifts in growth light optima among diatom species support their succession during the spring bloom in the Arctic |
title_sort |
shifts in growth light optima among diatom species support their succession during the spring bloom in the arctic |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1111/1365-2745.13874 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2745.13874 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2745.13874 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2745.13874 |
genre |
Arctic Ocean Baffin Bay Baffin Bay Baffin Phytoplankton Sea ice |
genre_facet |
Arctic Ocean Baffin Bay Baffin Bay Baffin Phytoplankton Sea ice |
op_source |
Journal of Ecology volume 110, issue 6, page 1356-1375 ISSN 0022-0477 1365-2745 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/1365-2745.13874 |
container_title |
Journal of Ecology |
container_volume |
110 |
container_issue |
6 |
container_start_page |
1356 |
op_container_end_page |
1375 |
_version_ |
1810430352164913152 |