Trophic interactions, toxicokinetics, and detoxification processes in a domoic acid-producing diatom and two copepod species
In costal ecosystems, copepods coexist with toxin-producing phytoplankton. The presence of copepods can amplify the phytoplankton toxin production and thereby increase the overall toxicity of a bloom. Copepods are not always affected by the toxins and can vector the toxins to higher trophic levels....
Published in: | Limnology and Oceanography |
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2019
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Online Access: | https://orbit.dtu.dk/en/publications/f9b4d62b-d283-4be3-bee8-b0e76d1ee804 https://doi.org/10.1002/lno.11078 |
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ftdtupubl:oai:pure.atira.dk:publications/f9b4d62b-d283-4be3-bee8-b0e76d1ee804 2024-06-09T07:45:13+00:00 Trophic interactions, toxicokinetics, and detoxification processes in a domoic acid-producing diatom and two copepod species Hardardottir, Sara Hjort, Ditte Marie Wohlrab, Sylke Krock, Bernd John, Uwe Nielsen, Torkel Gissel Lundholm, Nina 2019 https://orbit.dtu.dk/en/publications/f9b4d62b-d283-4be3-bee8-b0e76d1ee804 https://doi.org/10.1002/lno.11078 eng eng https://orbit.dtu.dk/en/publications/f9b4d62b-d283-4be3-bee8-b0e76d1ee804 info:eu-repo/semantics/closedAccess Hardardottir , S , Hjort , D M , Wohlrab , S , Krock , B , John , U , Nielsen , T G & Lundholm , N 2019 , ' Trophic interactions, toxicokinetics, and detoxification processes in a domoic acid-producing diatom and two copepod species ' , Limnology and Oceanography , vol. 64 , no. 3 , pp. 833-848 . https://doi.org/10.1002/lno.11078 article 2019 ftdtupubl https://doi.org/10.1002/lno.11078 2024-05-15T00:07:08Z In costal ecosystems, copepods coexist with toxin-producing phytoplankton. The presence of copepods can amplify the phytoplankton toxin production and thereby increase the overall toxicity of a bloom. Copepods are not always affected by the toxins and can vector the toxins to higher trophic levels. To investigate the interactions between toxin producers and their grazers, we determined the kinetics of grazer-induced increases in toxin production and the subsequent toxin reduction in a domoic acid (DA)-producing diatom, Pseudo-nitzschia seriata. The cellular DA level of the diatom was within the range of in situ measurements. Ten days after removal of the copepods, 28% 8% of the cellular DA still remained in the cells. Simultaneously, we monitored the toxicokinetics of DA in two grazers; Calanus finmarchicus and Calanus glacialis. After 144 h of grazing on the toxic diet, the copepods accumulated and retained high concentrations of DA. Nine hours after exposure to the toxic diet was terminated, the copepods had depurated 70% ± 10% of the DA. The depuration lasted 4 ± 2 d and was independent of Calanus species and treatment. We explored the possible physiological responses in copepods after feeding on a purely toxic diet from gene expression profiles of C. finmarchicus. Expression of genes regulating several major metabolic and cellular processes was reduced in copepods feeding on DA-containing diatoms, and we hypothesize that this is because of exposure to DA Article in Journal/Newspaper Calanus finmarchicus Calanus glacialis Copepods Technical University of Denmark: DTU Orbit Limnology and Oceanography 64 3 833 848 |
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Open Polar |
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Technical University of Denmark: DTU Orbit |
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ftdtupubl |
language |
English |
description |
In costal ecosystems, copepods coexist with toxin-producing phytoplankton. The presence of copepods can amplify the phytoplankton toxin production and thereby increase the overall toxicity of a bloom. Copepods are not always affected by the toxins and can vector the toxins to higher trophic levels. To investigate the interactions between toxin producers and their grazers, we determined the kinetics of grazer-induced increases in toxin production and the subsequent toxin reduction in a domoic acid (DA)-producing diatom, Pseudo-nitzschia seriata. The cellular DA level of the diatom was within the range of in situ measurements. Ten days after removal of the copepods, 28% 8% of the cellular DA still remained in the cells. Simultaneously, we monitored the toxicokinetics of DA in two grazers; Calanus finmarchicus and Calanus glacialis. After 144 h of grazing on the toxic diet, the copepods accumulated and retained high concentrations of DA. Nine hours after exposure to the toxic diet was terminated, the copepods had depurated 70% ± 10% of the DA. The depuration lasted 4 ± 2 d and was independent of Calanus species and treatment. We explored the possible physiological responses in copepods after feeding on a purely toxic diet from gene expression profiles of C. finmarchicus. Expression of genes regulating several major metabolic and cellular processes was reduced in copepods feeding on DA-containing diatoms, and we hypothesize that this is because of exposure to DA |
format |
Article in Journal/Newspaper |
author |
Hardardottir, Sara Hjort, Ditte Marie Wohlrab, Sylke Krock, Bernd John, Uwe Nielsen, Torkel Gissel Lundholm, Nina |
spellingShingle |
Hardardottir, Sara Hjort, Ditte Marie Wohlrab, Sylke Krock, Bernd John, Uwe Nielsen, Torkel Gissel Lundholm, Nina Trophic interactions, toxicokinetics, and detoxification processes in a domoic acid-producing diatom and two copepod species |
author_facet |
Hardardottir, Sara Hjort, Ditte Marie Wohlrab, Sylke Krock, Bernd John, Uwe Nielsen, Torkel Gissel Lundholm, Nina |
author_sort |
Hardardottir, Sara |
title |
Trophic interactions, toxicokinetics, and detoxification processes in a domoic acid-producing diatom and two copepod species |
title_short |
Trophic interactions, toxicokinetics, and detoxification processes in a domoic acid-producing diatom and two copepod species |
title_full |
Trophic interactions, toxicokinetics, and detoxification processes in a domoic acid-producing diatom and two copepod species |
title_fullStr |
Trophic interactions, toxicokinetics, and detoxification processes in a domoic acid-producing diatom and two copepod species |
title_full_unstemmed |
Trophic interactions, toxicokinetics, and detoxification processes in a domoic acid-producing diatom and two copepod species |
title_sort |
trophic interactions, toxicokinetics, and detoxification processes in a domoic acid-producing diatom and two copepod species |
publishDate |
2019 |
url |
https://orbit.dtu.dk/en/publications/f9b4d62b-d283-4be3-bee8-b0e76d1ee804 https://doi.org/10.1002/lno.11078 |
genre |
Calanus finmarchicus Calanus glacialis Copepods |
genre_facet |
Calanus finmarchicus Calanus glacialis Copepods |
op_source |
Hardardottir , S , Hjort , D M , Wohlrab , S , Krock , B , John , U , Nielsen , T G & Lundholm , N 2019 , ' Trophic interactions, toxicokinetics, and detoxification processes in a domoic acid-producing diatom and two copepod species ' , Limnology and Oceanography , vol. 64 , no. 3 , pp. 833-848 . https://doi.org/10.1002/lno.11078 |
op_relation |
https://orbit.dtu.dk/en/publications/f9b4d62b-d283-4be3-bee8-b0e76d1ee804 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1002/lno.11078 |
container_title |
Limnology and Oceanography |
container_volume |
64 |
container_issue |
3 |
container_start_page |
833 |
op_container_end_page |
848 |
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1801374272216629248 |