Characterization of a Southern Ocean deep chlorophyll maximum: Response of phytoplankton to light, iron, and manganese enrichment
Abstract Southern Ocean phytoplankton growth is limited by low iron (Fe) supply and irradiance, impacting the strength of the biological carbon pump. Unfavorable upper ocean conditions, such as low nutrient concentrations, can lead to the formation of deep chlorophyll or biomass maxima (DCM/DBM). Wh...
Published in: | Limnology and Oceanography Letters |
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Online Access: | http://dx.doi.org/10.1002/lol2.10366 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10366 |
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crwiley:10.1002/lol2.10366 2024-09-15T18:36:58+00:00 Characterization of a Southern Ocean deep chlorophyll maximum: Response of phytoplankton to light, iron, and manganese enrichment Latour, Pauline Eggins, Sam van der Merwe, Pier Bach, Lennart T. Boyd, Philip W. Ellwood, Michael J. Bowie, Andrew R. Wuttig, Kathrin Strzepek, Robert F. Antarctic Climate and Ecosystems Cooperative Research Centre 2023 http://dx.doi.org/10.1002/lol2.10366 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10366 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Limnology and Oceanography Letters volume 9, issue 2, page 145-154 ISSN 2378-2242 2378-2242 journal-article 2023 crwiley https://doi.org/10.1002/lol2.10366 2024-06-25T04:15:24Z Abstract Southern Ocean phytoplankton growth is limited by low iron (Fe) supply and irradiance, impacting the strength of the biological carbon pump. Unfavorable upper ocean conditions, such as low nutrient concentrations, can lead to the formation of deep chlorophyll or biomass maxima (DCM/DBM). While common in the Southern Ocean, these features remain understudied due to their subsurface location. To increase our understanding of their occurrence, we studied the responses of phytoplankton communities from a Southern Ocean DCM to increasing light, Fe, and manganese (Mn) levels. The DCM communities were light‐ and Fe‐limited, but light limitation did not increase phytoplankton Fe requirements. The greatest physiological responses were observed under combined Fe/light additions, which stimulated macronutrient drawdown, biomass production and the growth of large diatoms. Combined Mn/light additions induced subtle changes in Fe uptake rates and community composition, suggesting species‐specific Mn requirements. These results provide valuable information on Southern Ocean DCM phytoplankton physiology. Article in Journal/Newspaper Southern Ocean Wiley Online Library Limnology and Oceanography Letters 9 2 145 154 |
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Wiley Online Library |
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English |
description |
Abstract Southern Ocean phytoplankton growth is limited by low iron (Fe) supply and irradiance, impacting the strength of the biological carbon pump. Unfavorable upper ocean conditions, such as low nutrient concentrations, can lead to the formation of deep chlorophyll or biomass maxima (DCM/DBM). While common in the Southern Ocean, these features remain understudied due to their subsurface location. To increase our understanding of their occurrence, we studied the responses of phytoplankton communities from a Southern Ocean DCM to increasing light, Fe, and manganese (Mn) levels. The DCM communities were light‐ and Fe‐limited, but light limitation did not increase phytoplankton Fe requirements. The greatest physiological responses were observed under combined Fe/light additions, which stimulated macronutrient drawdown, biomass production and the growth of large diatoms. Combined Mn/light additions induced subtle changes in Fe uptake rates and community composition, suggesting species‐specific Mn requirements. These results provide valuable information on Southern Ocean DCM phytoplankton physiology. |
author2 |
Antarctic Climate and Ecosystems Cooperative Research Centre |
format |
Article in Journal/Newspaper |
author |
Latour, Pauline Eggins, Sam van der Merwe, Pier Bach, Lennart T. Boyd, Philip W. Ellwood, Michael J. Bowie, Andrew R. Wuttig, Kathrin Strzepek, Robert F. |
spellingShingle |
Latour, Pauline Eggins, Sam van der Merwe, Pier Bach, Lennart T. Boyd, Philip W. Ellwood, Michael J. Bowie, Andrew R. Wuttig, Kathrin Strzepek, Robert F. Characterization of a Southern Ocean deep chlorophyll maximum: Response of phytoplankton to light, iron, and manganese enrichment |
author_facet |
Latour, Pauline Eggins, Sam van der Merwe, Pier Bach, Lennart T. Boyd, Philip W. Ellwood, Michael J. Bowie, Andrew R. Wuttig, Kathrin Strzepek, Robert F. |
author_sort |
Latour, Pauline |
title |
Characterization of a Southern Ocean deep chlorophyll maximum: Response of phytoplankton to light, iron, and manganese enrichment |
title_short |
Characterization of a Southern Ocean deep chlorophyll maximum: Response of phytoplankton to light, iron, and manganese enrichment |
title_full |
Characterization of a Southern Ocean deep chlorophyll maximum: Response of phytoplankton to light, iron, and manganese enrichment |
title_fullStr |
Characterization of a Southern Ocean deep chlorophyll maximum: Response of phytoplankton to light, iron, and manganese enrichment |
title_full_unstemmed |
Characterization of a Southern Ocean deep chlorophyll maximum: Response of phytoplankton to light, iron, and manganese enrichment |
title_sort |
characterization of a southern ocean deep chlorophyll maximum: response of phytoplankton to light, iron, and manganese enrichment |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1002/lol2.10366 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10366 |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Limnology and Oceanography Letters volume 9, issue 2, page 145-154 ISSN 2378-2242 2378-2242 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/lol2.10366 |
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Limnology and Oceanography Letters |
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9 |
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2 |
container_start_page |
145 |
op_container_end_page |
154 |
_version_ |
1810480743985446912 |