The combined effect of pH and dissolved inorganic carbon concentrations on the physiology of plastidic ciliate Mesodinium rubrum and its cryptophyte prey
Ocean acidification is caused by rising atmospheric partial pressure of CO2 (pCO2) and involves a lowering of pH combined with increased concentrations of CO2 and dissolved in organic carbon in ocean waters. Many studies investigated the consequences of these combined changes on marine phytoplankton...
Published in: | Harmful Algae |
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2023
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Online Access: | https://curis.ku.dk/portal/da/publications/the-combined-effect-of-ph-and-dissolved-inorganic-carbon-concentrations-on-the-physiology-of-plastidic-ciliate-mesodinium-rubrum-and-its-cryptophyte-prey(40b434b1-ab79-4fec-9da7-d7c9c0f0ee6e).html https://doi.org/10.1016/j.hal.2023.102509 https://curis.ku.dk/ws/files/367484122/1_s2.0_S156898832300135X_main.pdf |
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ftcopenhagenunip:oai:pure.atira.dk:publications/40b434b1-ab79-4fec-9da7-d7c9c0f0ee6e 2024-06-09T07:48:49+00:00 The combined effect of pH and dissolved inorganic carbon concentrations on the physiology of plastidic ciliate Mesodinium rubrum and its cryptophyte prey Yde Eriksen, Christine Schultz Desmaret Walli, Melanie Van de Waal, Dedmer B. Helmsing, Nico R. Dahl, Emma Ove Sørensen, Helle Hansen, Per Juel 2023 application/pdf https://curis.ku.dk/portal/da/publications/the-combined-effect-of-ph-and-dissolved-inorganic-carbon-concentrations-on-the-physiology-of-plastidic-ciliate-mesodinium-rubrum-and-its-cryptophyte-prey(40b434b1-ab79-4fec-9da7-d7c9c0f0ee6e).html https://doi.org/10.1016/j.hal.2023.102509 https://curis.ku.dk/ws/files/367484122/1_s2.0_S156898832300135X_main.pdf eng eng info:eu-repo/semantics/openAccess Yde Eriksen , C S , Desmaret Walli , M , Van de Waal , D B , Helmsing , N R , Dahl , E O , Sørensen , H & Hansen , P J 2023 , ' The combined effect of pH and dissolved inorganic carbon concentrations on the physiology of plastidic ciliate Mesodinium rubrum and its cryptophyte prey ' , Harmful Algae , vol. 129 , 102509 . https://doi.org/10.1016/j.hal.2023.102509 article 2023 ftcopenhagenunip https://doi.org/10.1016/j.hal.2023.102509 2024-05-16T11:29:30Z Ocean acidification is caused by rising atmospheric partial pressure of CO2 (pCO2) and involves a lowering of pH combined with increased concentrations of CO2 and dissolved in organic carbon in ocean waters. Many studies investigated the consequences of these combined changes on marine phytoplankton, yet only few attempted to separate the effects of decreased pH and increased pCO2. Moreover, studies typically target photoautotrophic phytoplankton, while little is known of plastidic protists that depend on the ingestion of plastids from their prey. Therefore, we studied the separate and interactive effects of pH and DIC levels on the plastidic ciliate Mesodinium rubrum, which is known to form red tides in coastal waters worldwide. Also, we tested the effects on their prey, which typically are cryptophytes belonging to the Teleaulax/Plagioslemis/Geminigera species complex. These cryptophytes not only serve as food for the ciliate, but also as a supplier of chloroplasts and prey nuclei. We exposed M. rubrum and the two cryptophyte species, T. acuta, T. amphioxeia to different pH (6.8 - 8) and DIC levels (∼ 6.5 - 26 mg C L-1) and assessed their growth and photosynthetic rates, and cellular chlorophyll a and elemental contents. Our findings did not show consistent significant effects across the ranges in pH and/or DIC, except for M. rubrum, for which growth was negatively affected only by the lowest pH of 6.8 combined with lower DIC concentrations. It thus seems that M. rubrum is largely resilient to changes in pH and DIC, and its blooms may not be strongly impacted by the changes in ocean carbonate chemistry projected for the end of the 21st century. Article in Journal/Newspaper Ocean acidification University of Copenhagen: Research Harmful Algae 129 102509 |
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Open Polar |
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University of Copenhagen: Research |
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ftcopenhagenunip |
language |
English |
description |
Ocean acidification is caused by rising atmospheric partial pressure of CO2 (pCO2) and involves a lowering of pH combined with increased concentrations of CO2 and dissolved in organic carbon in ocean waters. Many studies investigated the consequences of these combined changes on marine phytoplankton, yet only few attempted to separate the effects of decreased pH and increased pCO2. Moreover, studies typically target photoautotrophic phytoplankton, while little is known of plastidic protists that depend on the ingestion of plastids from their prey. Therefore, we studied the separate and interactive effects of pH and DIC levels on the plastidic ciliate Mesodinium rubrum, which is known to form red tides in coastal waters worldwide. Also, we tested the effects on their prey, which typically are cryptophytes belonging to the Teleaulax/Plagioslemis/Geminigera species complex. These cryptophytes not only serve as food for the ciliate, but also as a supplier of chloroplasts and prey nuclei. We exposed M. rubrum and the two cryptophyte species, T. acuta, T. amphioxeia to different pH (6.8 - 8) and DIC levels (∼ 6.5 - 26 mg C L-1) and assessed their growth and photosynthetic rates, and cellular chlorophyll a and elemental contents. Our findings did not show consistent significant effects across the ranges in pH and/or DIC, except for M. rubrum, for which growth was negatively affected only by the lowest pH of 6.8 combined with lower DIC concentrations. It thus seems that M. rubrum is largely resilient to changes in pH and DIC, and its blooms may not be strongly impacted by the changes in ocean carbonate chemistry projected for the end of the 21st century. |
format |
Article in Journal/Newspaper |
author |
Yde Eriksen, Christine Schultz Desmaret Walli, Melanie Van de Waal, Dedmer B. Helmsing, Nico R. Dahl, Emma Ove Sørensen, Helle Hansen, Per Juel |
spellingShingle |
Yde Eriksen, Christine Schultz Desmaret Walli, Melanie Van de Waal, Dedmer B. Helmsing, Nico R. Dahl, Emma Ove Sørensen, Helle Hansen, Per Juel The combined effect of pH and dissolved inorganic carbon concentrations on the physiology of plastidic ciliate Mesodinium rubrum and its cryptophyte prey |
author_facet |
Yde Eriksen, Christine Schultz Desmaret Walli, Melanie Van de Waal, Dedmer B. Helmsing, Nico R. Dahl, Emma Ove Sørensen, Helle Hansen, Per Juel |
author_sort |
Yde Eriksen, Christine Schultz |
title |
The combined effect of pH and dissolved inorganic carbon concentrations on the physiology of plastidic ciliate Mesodinium rubrum and its cryptophyte prey |
title_short |
The combined effect of pH and dissolved inorganic carbon concentrations on the physiology of plastidic ciliate Mesodinium rubrum and its cryptophyte prey |
title_full |
The combined effect of pH and dissolved inorganic carbon concentrations on the physiology of plastidic ciliate Mesodinium rubrum and its cryptophyte prey |
title_fullStr |
The combined effect of pH and dissolved inorganic carbon concentrations on the physiology of plastidic ciliate Mesodinium rubrum and its cryptophyte prey |
title_full_unstemmed |
The combined effect of pH and dissolved inorganic carbon concentrations on the physiology of plastidic ciliate Mesodinium rubrum and its cryptophyte prey |
title_sort |
combined effect of ph and dissolved inorganic carbon concentrations on the physiology of plastidic ciliate mesodinium rubrum and its cryptophyte prey |
publishDate |
2023 |
url |
https://curis.ku.dk/portal/da/publications/the-combined-effect-of-ph-and-dissolved-inorganic-carbon-concentrations-on-the-physiology-of-plastidic-ciliate-mesodinium-rubrum-and-its-cryptophyte-prey(40b434b1-ab79-4fec-9da7-d7c9c0f0ee6e).html https://doi.org/10.1016/j.hal.2023.102509 https://curis.ku.dk/ws/files/367484122/1_s2.0_S156898832300135X_main.pdf |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Yde Eriksen , C S , Desmaret Walli , M , Van de Waal , D B , Helmsing , N R , Dahl , E O , Sørensen , H & Hansen , P J 2023 , ' The combined effect of pH and dissolved inorganic carbon concentrations on the physiology of plastidic ciliate Mesodinium rubrum and its cryptophyte prey ' , Harmful Algae , vol. 129 , 102509 . https://doi.org/10.1016/j.hal.2023.102509 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.hal.2023.102509 |
container_title |
Harmful Algae |
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129 |
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102509 |
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1801380709402673152 |