Impacts of ocean acidification on growth and toxin content of the marine diatoms Pseudo-nitzschia australis and P. fraudulenta
This paper present the effects of ocean acidification on growth and domoic acid (DA) content of several strains of the toxic Pseudo-nitzschia australis and the non-toxic P. fraudulenta. Three strains of each species (plus two subclones of P. australis) were acclimated and grown in semi-continuous cu...
Published in: | Marine Environmental Research |
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Language: | English |
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2021
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Online Access: | https://curis.ku.dk/portal/da/publications/impacts-of-ocean-acidification-on-growth-and-toxin-content-of-the-marine-diatoms-pseudonitzschia-australis-and-p-fraudulenta(3531ad6e-2bfe-495c-baf1-d28665dda90f).html https://doi.org/10.1016/j.marenvres.2021.105380 https://curis.ku.dk/ws/files/333295662/1_s2.0_S0141113621001367_am.pdf |
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ftcopenhagenunip:oai:pure.atira.dk:publications/3531ad6e-2bfe-495c-baf1-d28665dda90f 2024-06-09T07:48:45+00:00 Impacts of ocean acidification on growth and toxin content of the marine diatoms Pseudo-nitzschia australis and P. fraudulenta Ayache, Nour Lundholm, Nina Gai, Frederik Hervé, Fabienne Amzil, Zouher Caruana, Amandine 2021 application/pdf https://curis.ku.dk/portal/da/publications/impacts-of-ocean-acidification-on-growth-and-toxin-content-of-the-marine-diatoms-pseudonitzschia-australis-and-p-fraudulenta(3531ad6e-2bfe-495c-baf1-d28665dda90f).html https://doi.org/10.1016/j.marenvres.2021.105380 https://curis.ku.dk/ws/files/333295662/1_s2.0_S0141113621001367_am.pdf eng eng info:eu-repo/semantics/openAccess Ayache , N , Lundholm , N , Gai , F , Hervé , F , Amzil , Z & Caruana , A 2021 , ' Impacts of ocean acidification on growth and toxin content of the marine diatoms Pseudo-nitzschia australis and P. fraudulenta ' , Marine Environmental Research , vol. 169 , 105380 . https://doi.org/10.1016/j.marenvres.2021.105380 Amnesic shellfish poisoning Domoic acid Harmful algae Ocean acidification Pseudo-nitzschia article 2021 ftcopenhagenunip https://doi.org/10.1016/j.marenvres.2021.105380 2024-05-16T11:29:20Z This paper present the effects of ocean acidification on growth and domoic acid (DA) content of several strains of the toxic Pseudo-nitzschia australis and the non-toxic P. fraudulenta. Three strains of each species (plus two subclones of P. australis) were acclimated and grown in semi-continuous cultures at three pH levels: 8.07, 7.77, and 7.40, in order to simulate changes of seawater pH from present to plausible future levels. Our results showed that lowering pH from current level (8.07) to predicted pH level in 2100 (7.77) did not affect the mean growth rates of some of the P. australis strains (FR-PAU-17 and L3-100), but affected other strains either negatively (L3-30) or positively (L3.4). However, the growth rates significantly decreased with pH lowered to 7.40 (by 13% for L3-100, 43% for L3-30 and 16% for IFR-PAU-17 compared to the rates at pH 8.07). In contrast, growth rates of the non-toxic P. fraudulenta strains were not affected by pH changing from 8.07 to 7.40. The P. australis strains produced DA at all pH levels tested, and the highest particulate DA concentration normalized to cell abundance (pDA) was found at pH 8.07. Total DA content (pDA and dissolved DA) was significantly higher at current pH (8.07) compared to pH (7.77), exept for one strain (L 3.4) where no difference was found. At lower pH levels 7.77–7.40, total DA content was similar, except for strains IFR-PAU-17 and L3-100 which had the lowest content at the pH 7.77. The diversity in the responses in growth and DA content highlights the inter- and intra-specific variation in Pseudo-nitzschia species in response to ocean acidification. When exploring environmental responses of Pseudo-nitzschia using cultured cells, not only strain-specific variation but also culturing history should be taken into consideration, as the light levels under which the subclones were cultured, afterwards affected both maximum growth rates and DA content. Article in Journal/Newspaper Ocean acidification University of Copenhagen: Research Marine Environmental Research 169 105380 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
topic |
Amnesic shellfish poisoning Domoic acid Harmful algae Ocean acidification Pseudo-nitzschia |
spellingShingle |
Amnesic shellfish poisoning Domoic acid Harmful algae Ocean acidification Pseudo-nitzschia Ayache, Nour Lundholm, Nina Gai, Frederik Hervé, Fabienne Amzil, Zouher Caruana, Amandine Impacts of ocean acidification on growth and toxin content of the marine diatoms Pseudo-nitzschia australis and P. fraudulenta |
topic_facet |
Amnesic shellfish poisoning Domoic acid Harmful algae Ocean acidification Pseudo-nitzschia |
description |
This paper present the effects of ocean acidification on growth and domoic acid (DA) content of several strains of the toxic Pseudo-nitzschia australis and the non-toxic P. fraudulenta. Three strains of each species (plus two subclones of P. australis) were acclimated and grown in semi-continuous cultures at three pH levels: 8.07, 7.77, and 7.40, in order to simulate changes of seawater pH from present to plausible future levels. Our results showed that lowering pH from current level (8.07) to predicted pH level in 2100 (7.77) did not affect the mean growth rates of some of the P. australis strains (FR-PAU-17 and L3-100), but affected other strains either negatively (L3-30) or positively (L3.4). However, the growth rates significantly decreased with pH lowered to 7.40 (by 13% for L3-100, 43% for L3-30 and 16% for IFR-PAU-17 compared to the rates at pH 8.07). In contrast, growth rates of the non-toxic P. fraudulenta strains were not affected by pH changing from 8.07 to 7.40. The P. australis strains produced DA at all pH levels tested, and the highest particulate DA concentration normalized to cell abundance (pDA) was found at pH 8.07. Total DA content (pDA and dissolved DA) was significantly higher at current pH (8.07) compared to pH (7.77), exept for one strain (L 3.4) where no difference was found. At lower pH levels 7.77–7.40, total DA content was similar, except for strains IFR-PAU-17 and L3-100 which had the lowest content at the pH 7.77. The diversity in the responses in growth and DA content highlights the inter- and intra-specific variation in Pseudo-nitzschia species in response to ocean acidification. When exploring environmental responses of Pseudo-nitzschia using cultured cells, not only strain-specific variation but also culturing history should be taken into consideration, as the light levels under which the subclones were cultured, afterwards affected both maximum growth rates and DA content. |
format |
Article in Journal/Newspaper |
author |
Ayache, Nour Lundholm, Nina Gai, Frederik Hervé, Fabienne Amzil, Zouher Caruana, Amandine |
author_facet |
Ayache, Nour Lundholm, Nina Gai, Frederik Hervé, Fabienne Amzil, Zouher Caruana, Amandine |
author_sort |
Ayache, Nour |
title |
Impacts of ocean acidification on growth and toxin content of the marine diatoms Pseudo-nitzschia australis and P. fraudulenta |
title_short |
Impacts of ocean acidification on growth and toxin content of the marine diatoms Pseudo-nitzschia australis and P. fraudulenta |
title_full |
Impacts of ocean acidification on growth and toxin content of the marine diatoms Pseudo-nitzschia australis and P. fraudulenta |
title_fullStr |
Impacts of ocean acidification on growth and toxin content of the marine diatoms Pseudo-nitzschia australis and P. fraudulenta |
title_full_unstemmed |
Impacts of ocean acidification on growth and toxin content of the marine diatoms Pseudo-nitzschia australis and P. fraudulenta |
title_sort |
impacts of ocean acidification on growth and toxin content of the marine diatoms pseudo-nitzschia australis and p. fraudulenta |
publishDate |
2021 |
url |
https://curis.ku.dk/portal/da/publications/impacts-of-ocean-acidification-on-growth-and-toxin-content-of-the-marine-diatoms-pseudonitzschia-australis-and-p-fraudulenta(3531ad6e-2bfe-495c-baf1-d28665dda90f).html https://doi.org/10.1016/j.marenvres.2021.105380 https://curis.ku.dk/ws/files/333295662/1_s2.0_S0141113621001367_am.pdf |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Ayache , N , Lundholm , N , Gai , F , Hervé , F , Amzil , Z & Caruana , A 2021 , ' Impacts of ocean acidification on growth and toxin content of the marine diatoms Pseudo-nitzschia australis and P. fraudulenta ' , Marine Environmental Research , vol. 169 , 105380 . https://doi.org/10.1016/j.marenvres.2021.105380 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.marenvres.2021.105380 |
container_title |
Marine Environmental Research |
container_volume |
169 |
container_start_page |
105380 |
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1801380631055171584 |