Feeding in mixoplankton enhances phototrophy increasing bloom-induced pH changes with ocean acidification
Abstract Plankton phototrophy consumes CO2, increasing seawater pH, while heterotrophy does the converse. Elevation of pH (>8.5) during coastal blooms becomes increasingly deleterious for plankton. Mixoplankton, which can be important bloom-formers, engage in both photoautotrophy and phagohet...
Published in: | Journal of Plankton Research |
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2023
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Online Access: | http://dx.doi.org/10.1093/plankt/fbad030 https://academic.oup.com/plankt/article-pdf/45/4/636/50927775/fbad030.pdf |
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croxfordunivpr:10.1093/plankt/fbad030 2024-09-15T18:27:52+00:00 Feeding in mixoplankton enhances phototrophy increasing bloom-induced pH changes with ocean acidification Flynn, Kevin J Mitra, Aditee Natural Environment Research Council European Union’s Horizon 2020 Research and Innovation Program European Regional Development Fund WEFO Sêr Cymru II Programme Living 2023 http://dx.doi.org/10.1093/plankt/fbad030 https://academic.oup.com/plankt/article-pdf/45/4/636/50927775/fbad030.pdf en eng Oxford University Press (OUP) https://creativecommons.org/licenses/by/4.0/ Journal of Plankton Research volume 45, issue 4, page 636-651 ISSN 0142-7873 1464-3774 journal-article 2023 croxfordunivpr https://doi.org/10.1093/plankt/fbad030 2024-08-12T04:22:53Z Abstract Plankton phototrophy consumes CO2, increasing seawater pH, while heterotrophy does the converse. Elevation of pH (>8.5) during coastal blooms becomes increasingly deleterious for plankton. Mixoplankton, which can be important bloom-formers, engage in both photoautotrophy and phagoheterotrophy; in theory, this activity could create a relatively stable pH environment for plankton growth. Using a systems biology modelling approach, we explored whether different mixoplankton functional groups could modulate the environmental pH compared to the extreme activities of phototrophic phytoplankton and heterotrophic zooplankton. Activities by most mixoplankton groups do not stabilize seawater pH. Through access to additional nutrient streams from internal recycling with phagotrophy, mixoplankton phototrophy is enhanced, elevating pH; this is especially so for constitutive and plastidic specialist non-constitutive mixoplankton. Mixoplankton blooms can exceed the size of phytoplankton blooms; the synergisms of mixoplankton physiology, accessing nutrition via phagotrophy as well as from inorganic sources, enhance or augment primary production rather than depressing it. Ocean acidification will thus enable larger coastal mixoplankton blooms to form before basification becomes detrimental. The dynamics of such bloom developments will depend on whether the mixoplankton are consuming heterotrophs and/or phototrophs and how the plankton community succession evolves. Article in Journal/Newspaper Ocean acidification Oxford University Press Journal of Plankton Research 45 4 636 651 |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract Plankton phototrophy consumes CO2, increasing seawater pH, while heterotrophy does the converse. Elevation of pH (>8.5) during coastal blooms becomes increasingly deleterious for plankton. Mixoplankton, which can be important bloom-formers, engage in both photoautotrophy and phagoheterotrophy; in theory, this activity could create a relatively stable pH environment for plankton growth. Using a systems biology modelling approach, we explored whether different mixoplankton functional groups could modulate the environmental pH compared to the extreme activities of phototrophic phytoplankton and heterotrophic zooplankton. Activities by most mixoplankton groups do not stabilize seawater pH. Through access to additional nutrient streams from internal recycling with phagotrophy, mixoplankton phototrophy is enhanced, elevating pH; this is especially so for constitutive and plastidic specialist non-constitutive mixoplankton. Mixoplankton blooms can exceed the size of phytoplankton blooms; the synergisms of mixoplankton physiology, accessing nutrition via phagotrophy as well as from inorganic sources, enhance or augment primary production rather than depressing it. Ocean acidification will thus enable larger coastal mixoplankton blooms to form before basification becomes detrimental. The dynamics of such bloom developments will depend on whether the mixoplankton are consuming heterotrophs and/or phototrophs and how the plankton community succession evolves. |
author2 |
Natural Environment Research Council European Union’s Horizon 2020 Research and Innovation Program European Regional Development Fund WEFO Sêr Cymru II Programme Living |
format |
Article in Journal/Newspaper |
author |
Flynn, Kevin J Mitra, Aditee |
spellingShingle |
Flynn, Kevin J Mitra, Aditee Feeding in mixoplankton enhances phototrophy increasing bloom-induced pH changes with ocean acidification |
author_facet |
Flynn, Kevin J Mitra, Aditee |
author_sort |
Flynn, Kevin J |
title |
Feeding in mixoplankton enhances phototrophy increasing bloom-induced pH changes with ocean acidification |
title_short |
Feeding in mixoplankton enhances phototrophy increasing bloom-induced pH changes with ocean acidification |
title_full |
Feeding in mixoplankton enhances phototrophy increasing bloom-induced pH changes with ocean acidification |
title_fullStr |
Feeding in mixoplankton enhances phototrophy increasing bloom-induced pH changes with ocean acidification |
title_full_unstemmed |
Feeding in mixoplankton enhances phototrophy increasing bloom-induced pH changes with ocean acidification |
title_sort |
feeding in mixoplankton enhances phototrophy increasing bloom-induced ph changes with ocean acidification |
publisher |
Oxford University Press (OUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1093/plankt/fbad030 https://academic.oup.com/plankt/article-pdf/45/4/636/50927775/fbad030.pdf |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Journal of Plankton Research volume 45, issue 4, page 636-651 ISSN 0142-7873 1464-3774 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1093/plankt/fbad030 |
container_title |
Journal of Plankton Research |
container_volume |
45 |
container_issue |
4 |
container_start_page |
636 |
op_container_end_page |
651 |
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1810469150629298176 |