Can photoinhibition control phytoplankton abundance in deeply mixed water columns of the Southern Ocean?
To study how natural Southern Ocean phytoplankton communities acclimate to rapid fluctuations in irradiance levels that result from deep wind-driven mixing of the upper water column, we measured their fluorescence properties (Fv : Fm, maximum quantum yield of photosystem II; and qN, non-photochemica...
Published in: | Limnology and Oceanography |
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Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2010
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Online Access: | https://hdl.handle.net/11370/1f340027-e178-4a7b-babc-75ae48b8748e https://research.rug.nl/en/publications/1f340027-e178-4a7b-babc-75ae48b8748e https://doi.org/10.4319/lo.2010.55.3.1248 https://pure.rug.nl/ws/files/14927018/2010LimnolOceanogrAlderkamp.pdf |
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ftunigroningenpu:oai:pure.rug.nl:publications/1f340027-e178-4a7b-babc-75ae48b8748e 2024-06-02T07:57:42+00:00 Can photoinhibition control phytoplankton abundance in deeply mixed water columns of the Southern Ocean? Alderkamp, Anne-Carlijn de Baar, Hein J. W. Visser, Ronald J. W. Arrigo, Kevin R. 2010-05 application/pdf https://hdl.handle.net/11370/1f340027-e178-4a7b-babc-75ae48b8748e https://research.rug.nl/en/publications/1f340027-e178-4a7b-babc-75ae48b8748e https://doi.org/10.4319/lo.2010.55.3.1248 https://pure.rug.nl/ws/files/14927018/2010LimnolOceanogrAlderkamp.pdf eng eng https://research.rug.nl/en/publications/1f340027-e178-4a7b-babc-75ae48b8748e info:eu-repo/semantics/openAccess Alderkamp , A-C , de Baar , H J W , Visser , R J W & Arrigo , K R 2010 , ' Can photoinhibition control phytoplankton abundance in deeply mixed water columns of the Southern Ocean? ' , Limnology and Oceanography , vol. 55 , no. 3 , pp. 1248-1264 . https://doi.org/10.4319/lo.2010.55.3.1248 UV-B RADIATION PHOTOSYSTEM-II CHLOROPHYLL FLUORESCENCE ANTARCTIC WATERS MARINE DIATOM D1 PROTEIN PHAEODACTYLUM-TRICORNUTUM DUNALIELLA-TERTIOLECTA PHAEOCYSTIS-ANTARCTICA ULTRAVIOLET-RADIATION article 2010 ftunigroningenpu https://doi.org/10.4319/lo.2010.55.3.1248 2024-05-07T18:43:19Z To study how natural Southern Ocean phytoplankton communities acclimate to rapid fluctuations in irradiance levels that result from deep wind-driven mixing of the upper water column, we measured their fluorescence properties (Fv : Fm, maximum quantum yield of photosystem II; and qN, non-photochemical quenching) and pigment composition. Values of Fv : Fm were low (0.67) throughout the upper mixed layer (UML). Short-term (20-min) exposure to incident surface irradiance strongly reduced Fv : Fm and recovery was slow under subsequent incubation at low irradiance. This suggests that phytoplankton cells are frequently photodamaged when mixed up to the surface from depth. Recovery of Fv : Fm was suppressed when lincomycin was added, inhibiting synthesis of the photosystem II reaction center D1 protein. This indicates that D1 protein repair is crucial in maintaining photosynthetic performance under fluctuating irradiance levels. Regions within the Antarctic Circumpolar Current (ACC) with a deep UML had lower depth-integrated phytoplankton biomass than regions close to the Antarctic continent with a shallow UML. Surprisingly, the depth-averaged light level within the UML in these latter regions was lower than in the ACC. Thus, it appears that photodamage incurred during the high irradiance portion of the vertical mixing cycle, rather than light limitation, controls phytoplankton growth in regions of the Southern Ocean with a deep UML. This concept represents a shift from the widely accepted paradigm that phytoplankton growth in the open Southern Ocean is limited by low levels of light or inadequate iron supply. Article in Journal/Newspaper Antarc* Antarctic Antarctica Southern Ocean University of Groningen research database Antarctic Southern Ocean The Antarctic Limnology and Oceanography 55 3 1248 1264 |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
UV-B RADIATION PHOTOSYSTEM-II CHLOROPHYLL FLUORESCENCE ANTARCTIC WATERS MARINE DIATOM D1 PROTEIN PHAEODACTYLUM-TRICORNUTUM DUNALIELLA-TERTIOLECTA PHAEOCYSTIS-ANTARCTICA ULTRAVIOLET-RADIATION |
spellingShingle |
UV-B RADIATION PHOTOSYSTEM-II CHLOROPHYLL FLUORESCENCE ANTARCTIC WATERS MARINE DIATOM D1 PROTEIN PHAEODACTYLUM-TRICORNUTUM DUNALIELLA-TERTIOLECTA PHAEOCYSTIS-ANTARCTICA ULTRAVIOLET-RADIATION Alderkamp, Anne-Carlijn de Baar, Hein J. W. Visser, Ronald J. W. Arrigo, Kevin R. Can photoinhibition control phytoplankton abundance in deeply mixed water columns of the Southern Ocean? |
topic_facet |
UV-B RADIATION PHOTOSYSTEM-II CHLOROPHYLL FLUORESCENCE ANTARCTIC WATERS MARINE DIATOM D1 PROTEIN PHAEODACTYLUM-TRICORNUTUM DUNALIELLA-TERTIOLECTA PHAEOCYSTIS-ANTARCTICA ULTRAVIOLET-RADIATION |
description |
To study how natural Southern Ocean phytoplankton communities acclimate to rapid fluctuations in irradiance levels that result from deep wind-driven mixing of the upper water column, we measured their fluorescence properties (Fv : Fm, maximum quantum yield of photosystem II; and qN, non-photochemical quenching) and pigment composition. Values of Fv : Fm were low (0.67) throughout the upper mixed layer (UML). Short-term (20-min) exposure to incident surface irradiance strongly reduced Fv : Fm and recovery was slow under subsequent incubation at low irradiance. This suggests that phytoplankton cells are frequently photodamaged when mixed up to the surface from depth. Recovery of Fv : Fm was suppressed when lincomycin was added, inhibiting synthesis of the photosystem II reaction center D1 protein. This indicates that D1 protein repair is crucial in maintaining photosynthetic performance under fluctuating irradiance levels. Regions within the Antarctic Circumpolar Current (ACC) with a deep UML had lower depth-integrated phytoplankton biomass than regions close to the Antarctic continent with a shallow UML. Surprisingly, the depth-averaged light level within the UML in these latter regions was lower than in the ACC. Thus, it appears that photodamage incurred during the high irradiance portion of the vertical mixing cycle, rather than light limitation, controls phytoplankton growth in regions of the Southern Ocean with a deep UML. This concept represents a shift from the widely accepted paradigm that phytoplankton growth in the open Southern Ocean is limited by low levels of light or inadequate iron supply. |
format |
Article in Journal/Newspaper |
author |
Alderkamp, Anne-Carlijn de Baar, Hein J. W. Visser, Ronald J. W. Arrigo, Kevin R. |
author_facet |
Alderkamp, Anne-Carlijn de Baar, Hein J. W. Visser, Ronald J. W. Arrigo, Kevin R. |
author_sort |
Alderkamp, Anne-Carlijn |
title |
Can photoinhibition control phytoplankton abundance in deeply mixed water columns of the Southern Ocean? |
title_short |
Can photoinhibition control phytoplankton abundance in deeply mixed water columns of the Southern Ocean? |
title_full |
Can photoinhibition control phytoplankton abundance in deeply mixed water columns of the Southern Ocean? |
title_fullStr |
Can photoinhibition control phytoplankton abundance in deeply mixed water columns of the Southern Ocean? |
title_full_unstemmed |
Can photoinhibition control phytoplankton abundance in deeply mixed water columns of the Southern Ocean? |
title_sort |
can photoinhibition control phytoplankton abundance in deeply mixed water columns of the southern ocean? |
publishDate |
2010 |
url |
https://hdl.handle.net/11370/1f340027-e178-4a7b-babc-75ae48b8748e https://research.rug.nl/en/publications/1f340027-e178-4a7b-babc-75ae48b8748e https://doi.org/10.4319/lo.2010.55.3.1248 https://pure.rug.nl/ws/files/14927018/2010LimnolOceanogrAlderkamp.pdf |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_source |
Alderkamp , A-C , de Baar , H J W , Visser , R J W & Arrigo , K R 2010 , ' Can photoinhibition control phytoplankton abundance in deeply mixed water columns of the Southern Ocean? ' , Limnology and Oceanography , vol. 55 , no. 3 , pp. 1248-1264 . https://doi.org/10.4319/lo.2010.55.3.1248 |
op_relation |
https://research.rug.nl/en/publications/1f340027-e178-4a7b-babc-75ae48b8748e |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.4319/lo.2010.55.3.1248 |
container_title |
Limnology and Oceanography |
container_volume |
55 |
container_issue |
3 |
container_start_page |
1248 |
op_container_end_page |
1264 |
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1800740885994930176 |