Modeling silicate–nitrate–ammonium co-limitation of algal growth and the importance of bacterial remineralization based on an experimental Arctic coastal spring bloom culture study
Arctic coastal ecosystems are rapidly changing due to climate warming. This makes modeling their productivity crucially important to better understand future changes. System primary production in these systems is highest during the pronounced spring bloom, typically dominated by diatoms. Eventually...
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Language: | English |
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2021
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Online Access: | https://www.vliz.be/imisdocs/publications/25/359825.pdf |
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ftnioz:oai:imis.nioz.nl:335895 2023-05-15T14:54:15+02:00 Modeling silicate–nitrate–ammonium co-limitation of algal growth and the importance of bacterial remineralization based on an experimental Arctic coastal spring bloom culture study Vonnahme, T.R. Leroy, M. Thoms, S. van Oevelen, D. Harvey, H.R. Kristiansen, S. Gradinger, R. Dietrich, U. Völker, C. 2021 application/pdf https://www.vliz.be/imisdocs/publications/25/359825.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000629037400001 info:eu-repo/semantics/altIdentifier/doi/.org/10.5194/bg-18-1719-2021 https://www.vliz.be/imisdocs/publications/25/359825.pdf info:eu-repo/semantics/openAccess %3Ci%3EBiogeosciences+18%285%29%3C%2Fi%3E%3A+1719-1747.+%3Ca+href%3D%22https%3A%2F%2Fdoi.org%2F10.5194%2Fbg-18-1719-2021%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdoi.org%2F10.5194%2Fbg-18-1719-2021%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2021 ftnioz https://doi.org/10.5194/bg-18-1719-2021 2022-05-01T14:14:05Z Arctic coastal ecosystems are rapidly changing due to climate warming. This makes modeling their productivity crucially important to better understand future changes. System primary production in these systems is highest during the pronounced spring bloom, typically dominated by diatoms. Eventually the spring blooms terminate due to silicon or nitrogen limitation. Bacteria can play an important role for extending bloom duration and total CO 2 fixation through ammonium regeneration. Current ecosystem models often simplify the effects of nutrient co-limitations on algal physiology and cellular ratios and simplify nutrient regeneration. These simplifications may lead to underestimations of primary production. Detailed biochemistry- and cell-based models can represent these dynamics but are difficult to tune in the environment. We performed a cultivation experiment that showed typical spring bloom dynamics, such as extended algal growth via bacterial ammonium remineralization, reduced algal growth and inhibited chlorophyll synthesis under silicate limitation, and gradually reduced nitrogen assimilation and chlorophyll synthesis under nitrogen limitation. We developed a simplified dynamic model to represent these processes. Overall, model complexity in terms of the number of parameters is comparable to the phytoplankton growth and nutrient biogeochemistry formulations in common ecosystem models used in the Arctic while improving the representation of nutrient-co-limitation-related processes. Such model enhancements that now incorporate increased nutrient inputs and higher mineralization rates in a warmer climate will improve future predictions in this vulnerable system. Article in Journal/Newspaper Arctic Phytoplankton NIOZ Repository (Royal Netherlands Institute for Sea Research) Arctic Biogeosciences 18 5 1719 1747 |
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Open Polar |
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NIOZ Repository (Royal Netherlands Institute for Sea Research) |
op_collection_id |
ftnioz |
language |
English |
description |
Arctic coastal ecosystems are rapidly changing due to climate warming. This makes modeling their productivity crucially important to better understand future changes. System primary production in these systems is highest during the pronounced spring bloom, typically dominated by diatoms. Eventually the spring blooms terminate due to silicon or nitrogen limitation. Bacteria can play an important role for extending bloom duration and total CO 2 fixation through ammonium regeneration. Current ecosystem models often simplify the effects of nutrient co-limitations on algal physiology and cellular ratios and simplify nutrient regeneration. These simplifications may lead to underestimations of primary production. Detailed biochemistry- and cell-based models can represent these dynamics but are difficult to tune in the environment. We performed a cultivation experiment that showed typical spring bloom dynamics, such as extended algal growth via bacterial ammonium remineralization, reduced algal growth and inhibited chlorophyll synthesis under silicate limitation, and gradually reduced nitrogen assimilation and chlorophyll synthesis under nitrogen limitation. We developed a simplified dynamic model to represent these processes. Overall, model complexity in terms of the number of parameters is comparable to the phytoplankton growth and nutrient biogeochemistry formulations in common ecosystem models used in the Arctic while improving the representation of nutrient-co-limitation-related processes. Such model enhancements that now incorporate increased nutrient inputs and higher mineralization rates in a warmer climate will improve future predictions in this vulnerable system. |
format |
Article in Journal/Newspaper |
author |
Vonnahme, T.R. Leroy, M. Thoms, S. van Oevelen, D. Harvey, H.R. Kristiansen, S. Gradinger, R. Dietrich, U. Völker, C. |
spellingShingle |
Vonnahme, T.R. Leroy, M. Thoms, S. van Oevelen, D. Harvey, H.R. Kristiansen, S. Gradinger, R. Dietrich, U. Völker, C. Modeling silicate–nitrate–ammonium co-limitation of algal growth and the importance of bacterial remineralization based on an experimental Arctic coastal spring bloom culture study |
author_facet |
Vonnahme, T.R. Leroy, M. Thoms, S. van Oevelen, D. Harvey, H.R. Kristiansen, S. Gradinger, R. Dietrich, U. Völker, C. |
author_sort |
Vonnahme, T.R. |
title |
Modeling silicate–nitrate–ammonium co-limitation of algal growth and the importance of bacterial remineralization based on an experimental Arctic coastal spring bloom culture study |
title_short |
Modeling silicate–nitrate–ammonium co-limitation of algal growth and the importance of bacterial remineralization based on an experimental Arctic coastal spring bloom culture study |
title_full |
Modeling silicate–nitrate–ammonium co-limitation of algal growth and the importance of bacterial remineralization based on an experimental Arctic coastal spring bloom culture study |
title_fullStr |
Modeling silicate–nitrate–ammonium co-limitation of algal growth and the importance of bacterial remineralization based on an experimental Arctic coastal spring bloom culture study |
title_full_unstemmed |
Modeling silicate–nitrate–ammonium co-limitation of algal growth and the importance of bacterial remineralization based on an experimental Arctic coastal spring bloom culture study |
title_sort |
modeling silicate–nitrate–ammonium co-limitation of algal growth and the importance of bacterial remineralization based on an experimental arctic coastal spring bloom culture study |
publishDate |
2021 |
url |
https://www.vliz.be/imisdocs/publications/25/359825.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Phytoplankton |
genre_facet |
Arctic Phytoplankton |
op_source |
%3Ci%3EBiogeosciences+18%285%29%3C%2Fi%3E%3A+1719-1747.+%3Ca+href%3D%22https%3A%2F%2Fdoi.org%2F10.5194%2Fbg-18-1719-2021%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdoi.org%2F10.5194%2Fbg-18-1719-2021%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000629037400001 info:eu-repo/semantics/altIdentifier/doi/.org/10.5194/bg-18-1719-2021 https://www.vliz.be/imisdocs/publications/25/359825.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-18-1719-2021 |
container_title |
Biogeosciences |
container_volume |
18 |
container_issue |
5 |
container_start_page |
1719 |
op_container_end_page |
1747 |
_version_ |
1766325976869896192 |