Effects of photosynthesis on the accumulation of Mn and Fe by Phaeocystis colonies
The significance of Mn and Fe accumulation by Phaeocystis colonies and its control by photosynthesis were investigated by performing incubation assays with radiotracers ( 54 Mn, 59 Fe and 14 C). Experiments were conducted on pure cultures of Phaeocystis globosa and on natural communities collected d...
Published in: | Limnology and Oceanography |
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crwiley:10.4319/lo.2001.46.5.1065 2024-09-15T17:57:32+00:00 Effects of photosynthesis on the accumulation of Mn and Fe by Phaeocystis colonies Schoemann, V. Wollast, R. Chou, L. Lancelot, C. 2001 http://dx.doi.org/10.4319/lo.2001.46.5.1065 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2001.46.5.1065 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2001.46.5.1065 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 46, issue 5, page 1065-1076 ISSN 0024-3590 1939-5590 journal-article 2001 crwiley https://doi.org/10.4319/lo.2001.46.5.1065 2024-08-27T04:32:28Z The significance of Mn and Fe accumulation by Phaeocystis colonies and its control by photosynthesis were investigated by performing incubation assays with radiotracers ( 54 Mn, 59 Fe and 14 C). Experiments were conducted on pure cultures of Phaeocystis globosa and on natural communities collected during a P. pouchetii bloom in the Balsfjord (subarctic Norwegian fjord) and a P. globosa bloom in the Southern Bight of the North Sea. Results indicate significant accumulation of Mn and Fe in the cultured colonies, as previously shown for Mn. Most of the Mn and Fe accumulation occurred in the mucilaginous matrix of the colonies, and the intracellular assimilation represented only ~10% of the total uptake of these trace elements. These experiments demonstrated that photosynthesis largely governed the uptake of Mn by the colonies but only slightly affected the accumulation of Fe. The positive linear relationships observed for the Balsfjord samples between the Mn uptake and the C fixation in the light suggests photosynthetic control of dissolved Mn removal to the Phaeocystis colonies. As had been predicted in earlier studies, the increase in pH and dissolved oxygen observed around and inside the colonies during the photosynthetic activity of the cells could significantly decrease Mn solubility and enhance Mn oxidation rate. However, these changes would not affect significantly the precipitation of Fe according to the thermodynamic considerations. In the highly turbid waters of the North Sea, the removal of Mn and Fe is increased by both inorganic and organic suspended particles, with no significant effect of photosynthesis on the overall uptake. Article in Journal/Newspaper Balsfjord Subarctic Wiley Online Library Limnology and Oceanography 46 5 1065 1076 |
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Open Polar |
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Wiley Online Library |
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crwiley |
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English |
description |
The significance of Mn and Fe accumulation by Phaeocystis colonies and its control by photosynthesis were investigated by performing incubation assays with radiotracers ( 54 Mn, 59 Fe and 14 C). Experiments were conducted on pure cultures of Phaeocystis globosa and on natural communities collected during a P. pouchetii bloom in the Balsfjord (subarctic Norwegian fjord) and a P. globosa bloom in the Southern Bight of the North Sea. Results indicate significant accumulation of Mn and Fe in the cultured colonies, as previously shown for Mn. Most of the Mn and Fe accumulation occurred in the mucilaginous matrix of the colonies, and the intracellular assimilation represented only ~10% of the total uptake of these trace elements. These experiments demonstrated that photosynthesis largely governed the uptake of Mn by the colonies but only slightly affected the accumulation of Fe. The positive linear relationships observed for the Balsfjord samples between the Mn uptake and the C fixation in the light suggests photosynthetic control of dissolved Mn removal to the Phaeocystis colonies. As had been predicted in earlier studies, the increase in pH and dissolved oxygen observed around and inside the colonies during the photosynthetic activity of the cells could significantly decrease Mn solubility and enhance Mn oxidation rate. However, these changes would not affect significantly the precipitation of Fe according to the thermodynamic considerations. In the highly turbid waters of the North Sea, the removal of Mn and Fe is increased by both inorganic and organic suspended particles, with no significant effect of photosynthesis on the overall uptake. |
format |
Article in Journal/Newspaper |
author |
Schoemann, V. Wollast, R. Chou, L. Lancelot, C. |
spellingShingle |
Schoemann, V. Wollast, R. Chou, L. Lancelot, C. Effects of photosynthesis on the accumulation of Mn and Fe by Phaeocystis colonies |
author_facet |
Schoemann, V. Wollast, R. Chou, L. Lancelot, C. |
author_sort |
Schoemann, V. |
title |
Effects of photosynthesis on the accumulation of Mn and Fe by Phaeocystis colonies |
title_short |
Effects of photosynthesis on the accumulation of Mn and Fe by Phaeocystis colonies |
title_full |
Effects of photosynthesis on the accumulation of Mn and Fe by Phaeocystis colonies |
title_fullStr |
Effects of photosynthesis on the accumulation of Mn and Fe by Phaeocystis colonies |
title_full_unstemmed |
Effects of photosynthesis on the accumulation of Mn and Fe by Phaeocystis colonies |
title_sort |
effects of photosynthesis on the accumulation of mn and fe by phaeocystis colonies |
publisher |
Wiley |
publishDate |
2001 |
url |
http://dx.doi.org/10.4319/lo.2001.46.5.1065 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2001.46.5.1065 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2001.46.5.1065 |
genre |
Balsfjord Subarctic |
genre_facet |
Balsfjord Subarctic |
op_source |
Limnology and Oceanography volume 46, issue 5, page 1065-1076 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.2001.46.5.1065 |
container_title |
Limnology and Oceanography |
container_volume |
46 |
container_issue |
5 |
container_start_page |
1065 |
op_container_end_page |
1076 |
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1810433678497546240 |