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...
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Online Access: | https://hal.science/hal-04203495 https://doi.org/10.1016/j.marenvres.2021.105380 |
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ftccsdartic:oai:HAL:hal-04203495v1 2023-10-09T21:54:51+02:00 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 Herve, Fabienne Amzil, Zouher Caruana, Amandine Laboratoire Phycotoxines (PHYC) Dynamiques des Écosystèmes Côtiers (DYNECO) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) 2021-07 https://hal.science/hal-04203495 https://doi.org/10.1016/j.marenvres.2021.105380 en eng HAL CCSD Elsevier science info:eu-repo/semantics/altIdentifier/doi/10.1016/j.marenvres.2021.105380 hal-04203495 https://hal.science/hal-04203495 doi:10.1016/j.marenvres.2021.105380 ISSN: 0141-1136 EISSN: 1879-0291 Marine Environmental Research https://hal.science/hal-04203495 Marine Environmental Research, 2021, 169, 105380 (9p.). ⟨10.1016/j.marenvres.2021.105380⟩ [SDV]Life Sciences [q-bio] info:eu-repo/semantics/article Journal articles 2021 ftccsdartic https://doi.org/10.1016/j.marenvres.2021.105380 2023-09-23T22:53:06Z 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 Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Marine Environmental Research 169 105380 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[SDV]Life Sciences [q-bio] |
spellingShingle |
[SDV]Life Sciences [q-bio] Ayache, Nour Lundholm, Nina Gai, Frederik Herve, 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 |
[SDV]Life Sciences [q-bio] |
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. |
author2 |
Laboratoire Phycotoxines (PHYC) Dynamiques des Écosystèmes Côtiers (DYNECO) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) |
format |
Article in Journal/Newspaper |
author |
Ayache, Nour Lundholm, Nina Gai, Frederik Herve, Fabienne Amzil, Zouher Caruana, Amandine |
author_facet |
Ayache, Nour Lundholm, Nina Gai, Frederik Herve, 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 |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-04203495 https://doi.org/10.1016/j.marenvres.2021.105380 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
ISSN: 0141-1136 EISSN: 1879-0291 Marine Environmental Research https://hal.science/hal-04203495 Marine Environmental Research, 2021, 169, 105380 (9p.). ⟨10.1016/j.marenvres.2021.105380⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.marenvres.2021.105380 hal-04203495 https://hal.science/hal-04203495 doi:10.1016/j.marenvres.2021.105380 |
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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1779318574018461696 |