Light rather than iron controls photosynthate production and allocation in Southern Ocean phytoplankton populations during austral autumn
The role of iron and light in controlling photosynthate production and allocation in phytoplankton populations of the Atlantic sector of the Southern Ocean was investigated in April-May 1999. The C-14 incorporation into five biochemical pools (glucan, amino acids, proteins, lipids and polysaccharide...
Published in: | Journal of Plankton Research |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2004
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Online Access: | https://hdl.handle.net/11370/fb17090d-8769-4ecd-a588-5997f983b72a https://research.rug.nl/en/publications/fb17090d-8769-4ecd-a588-5997f983b72a https://doi.org/10.1093/plankt/fbh088 |
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ftunigroningenpu:oai:pure.rug.nl:publications/fb17090d-8769-4ecd-a588-5997f983b72a 2024-06-02T07:56:08+00:00 Light rather than iron controls photosynthate production and allocation in Southern Ocean phytoplankton populations during austral autumn van Oijen, T van Leeuwe, M A Granum, E Weissing, F J Bellerby, RGJ Gieskes, W W C de Baar, HJW 2004-08 https://hdl.handle.net/11370/fb17090d-8769-4ecd-a588-5997f983b72a https://research.rug.nl/en/publications/fb17090d-8769-4ecd-a588-5997f983b72a https://doi.org/10.1093/plankt/fbh088 eng eng https://research.rug.nl/en/publications/fb17090d-8769-4ecd-a588-5997f983b72a info:eu-repo/semantics/closedAccess van Oijen , T , van Leeuwe , M A , Granum , E , Weissing , F J , Bellerby , RGJ , Gieskes , W W C & de Baar , HJW 2004 , ' Light rather than iron controls photosynthate production and allocation in Southern Ocean phytoplankton populations during austral autumn ' , Journal of Plankton Research , vol. 26 , no. 8 , pp. 885-900 . https://doi.org/10.1093/plankt/fbh088 DIATOM SKELETONEMA-COSTATUM EQUATORIAL PACIFIC-OCEAN DISSOLVED ORGANIC-MATTER MARINE EUKARYOTIC ALGAE ATLANTIC SECTOR ENVIRONMENTAL-FACTORS CARBOHYDRATE SOLUTES QUATERNARY AMMONIUM TERTIARY SULFONIUM OSMOTIC ADJUSTMENT article 2004 ftunigroningenpu https://doi.org/10.1093/plankt/fbh088 2024-05-07T17:45:38Z The role of iron and light in controlling photosynthate production and allocation in phytoplankton populations of the Atlantic sector of the Southern Ocean was investigated in April-May 1999. The C-14 incorporation into five biochemical pools (glucan, amino acids, proteins, lipids and polysaccharides) was measured during iron/light perturbation experiments. The diurnal Chl a-specific rates of carbon incorporation into these pools did not change in response to iron addition, yet were decreased at 20 mumol photons m(-2) s(-1), an irradiance comparable with the one at 20-45 m in situ depth. This suggests that the low phytoplankton biomass encountered (0.1-0.6 mug Chl a L-1) was mainly caused by light limitation in the deep wind mixed layer (>40 m). Regional differences in Chl a-specific carbon incorporation rates were not found in spite of differences in phytoplankton species composition: at the Antarctic Polar Front, biomass was dominated by a diatom population of Fragilariopsis kerguelensis, whereas smaller cells, including chrysophytes, were relatively more abundant in the Antarctic Circumpolar Current beyond the influence of frontal systems. Because mixing was often in excess of 100 m in the latter region, diatom cells may have been unable to fulfil their characteristically high Fe demand at low average light conditions, and thus became co-limited by both resources. Using a model that describes the C-14 incorporation, the consistency was shown between the dynamics in the glucan pool in the field experiments and in laboratory experiments with an Antarctic diatom, Chaetoceros brevis. The glucan respiration rate was almost twice as high during the dark phase as during the light phase, which is consistent with the role of glucan as a reserve supplying energy and carbon skeletons for continued protein synthesis during the night. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean University of Groningen research database Antarctic Austral Pacific Southern Ocean The Antarctic Journal of Plankton Research 26 8 885 900 |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
DIATOM SKELETONEMA-COSTATUM EQUATORIAL PACIFIC-OCEAN DISSOLVED ORGANIC-MATTER MARINE EUKARYOTIC ALGAE ATLANTIC SECTOR ENVIRONMENTAL-FACTORS CARBOHYDRATE SOLUTES QUATERNARY AMMONIUM TERTIARY SULFONIUM OSMOTIC ADJUSTMENT |
spellingShingle |
DIATOM SKELETONEMA-COSTATUM EQUATORIAL PACIFIC-OCEAN DISSOLVED ORGANIC-MATTER MARINE EUKARYOTIC ALGAE ATLANTIC SECTOR ENVIRONMENTAL-FACTORS CARBOHYDRATE SOLUTES QUATERNARY AMMONIUM TERTIARY SULFONIUM OSMOTIC ADJUSTMENT van Oijen, T van Leeuwe, M A Granum, E Weissing, F J Bellerby, RGJ Gieskes, W W C de Baar, HJW Light rather than iron controls photosynthate production and allocation in Southern Ocean phytoplankton populations during austral autumn |
topic_facet |
DIATOM SKELETONEMA-COSTATUM EQUATORIAL PACIFIC-OCEAN DISSOLVED ORGANIC-MATTER MARINE EUKARYOTIC ALGAE ATLANTIC SECTOR ENVIRONMENTAL-FACTORS CARBOHYDRATE SOLUTES QUATERNARY AMMONIUM TERTIARY SULFONIUM OSMOTIC ADJUSTMENT |
description |
The role of iron and light in controlling photosynthate production and allocation in phytoplankton populations of the Atlantic sector of the Southern Ocean was investigated in April-May 1999. The C-14 incorporation into five biochemical pools (glucan, amino acids, proteins, lipids and polysaccharides) was measured during iron/light perturbation experiments. The diurnal Chl a-specific rates of carbon incorporation into these pools did not change in response to iron addition, yet were decreased at 20 mumol photons m(-2) s(-1), an irradiance comparable with the one at 20-45 m in situ depth. This suggests that the low phytoplankton biomass encountered (0.1-0.6 mug Chl a L-1) was mainly caused by light limitation in the deep wind mixed layer (>40 m). Regional differences in Chl a-specific carbon incorporation rates were not found in spite of differences in phytoplankton species composition: at the Antarctic Polar Front, biomass was dominated by a diatom population of Fragilariopsis kerguelensis, whereas smaller cells, including chrysophytes, were relatively more abundant in the Antarctic Circumpolar Current beyond the influence of frontal systems. Because mixing was often in excess of 100 m in the latter region, diatom cells may have been unable to fulfil their characteristically high Fe demand at low average light conditions, and thus became co-limited by both resources. Using a model that describes the C-14 incorporation, the consistency was shown between the dynamics in the glucan pool in the field experiments and in laboratory experiments with an Antarctic diatom, Chaetoceros brevis. The glucan respiration rate was almost twice as high during the dark phase as during the light phase, which is consistent with the role of glucan as a reserve supplying energy and carbon skeletons for continued protein synthesis during the night. |
format |
Article in Journal/Newspaper |
author |
van Oijen, T van Leeuwe, M A Granum, E Weissing, F J Bellerby, RGJ Gieskes, W W C de Baar, HJW |
author_facet |
van Oijen, T van Leeuwe, M A Granum, E Weissing, F J Bellerby, RGJ Gieskes, W W C de Baar, HJW |
author_sort |
van Oijen, T |
title |
Light rather than iron controls photosynthate production and allocation in Southern Ocean phytoplankton populations during austral autumn |
title_short |
Light rather than iron controls photosynthate production and allocation in Southern Ocean phytoplankton populations during austral autumn |
title_full |
Light rather than iron controls photosynthate production and allocation in Southern Ocean phytoplankton populations during austral autumn |
title_fullStr |
Light rather than iron controls photosynthate production and allocation in Southern Ocean phytoplankton populations during austral autumn |
title_full_unstemmed |
Light rather than iron controls photosynthate production and allocation in Southern Ocean phytoplankton populations during austral autumn |
title_sort |
light rather than iron controls photosynthate production and allocation in southern ocean phytoplankton populations during austral autumn |
publishDate |
2004 |
url |
https://hdl.handle.net/11370/fb17090d-8769-4ecd-a588-5997f983b72a https://research.rug.nl/en/publications/fb17090d-8769-4ecd-a588-5997f983b72a https://doi.org/10.1093/plankt/fbh088 |
geographic |
Antarctic Austral Pacific Southern Ocean The Antarctic |
geographic_facet |
Antarctic Austral Pacific Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
van Oijen , T , van Leeuwe , M A , Granum , E , Weissing , F J , Bellerby , RGJ , Gieskes , W W C & de Baar , HJW 2004 , ' Light rather than iron controls photosynthate production and allocation in Southern Ocean phytoplankton populations during austral autumn ' , Journal of Plankton Research , vol. 26 , no. 8 , pp. 885-900 . https://doi.org/10.1093/plankt/fbh088 |
op_relation |
https://research.rug.nl/en/publications/fb17090d-8769-4ecd-a588-5997f983b72a |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1093/plankt/fbh088 |
container_title |
Journal of Plankton Research |
container_volume |
26 |
container_issue |
8 |
container_start_page |
885 |
op_container_end_page |
900 |
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1800753744655155200 |