Dangerous Relations in the Arctic Marine Food Web: Interactions between Toxin Producing Pseudo-nitzschia Diatoms and Calanus Copepodites
Diatoms of the genus Pseudo-nitzschia produce domoic acid (DA), a toxin that is vectored in the marine food web, thus causing serious problems for marine organisms and humans. In spite of this, knowledge of interactions between grazing zooplankton and diatoms is restricted. In this study, we examine...
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Online Access: | https://epic.awi.de/id/eprint/38242/ https://epic.awi.de/id/eprint/38242/1/Hardardottir_2015.pdf https://hdl.handle.net/10013/epic.45670 https://hdl.handle.net/10013/epic.45670.d001 |
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ftawi:oai:epic.awi.de:38242 2024-09-15T17:51:29+00:00 Dangerous Relations in the Arctic Marine Food Web: Interactions between Toxin Producing Pseudo-nitzschia Diatoms and Calanus Copepodites Hardardottir, Sara Pančić, Marina Tammilehto, Anna Krock, Bernd Møller, Eva Friis Nielsen, Torkel Gissel Lundholm, Nina 2015-06 application/pdf https://epic.awi.de/id/eprint/38242/ https://epic.awi.de/id/eprint/38242/1/Hardardottir_2015.pdf https://hdl.handle.net/10013/epic.45670 https://hdl.handle.net/10013/epic.45670.d001 unknown MDPI AG https://epic.awi.de/id/eprint/38242/1/Hardardottir_2015.pdf https://hdl.handle.net/10013/epic.45670.d001 Hardardottir, S. , Pančić, M. , Tammilehto, A. , Krock, B. orcid:0000-0003-4022-9101 , Møller, E. F. , Nielsen, T. G. and Lundholm, N. (2015) Dangerous Relations in the Arctic Marine Food Web: Interactions between Toxin Producing Pseudo-nitzschia Diatoms and Calanus Copepodites , Marine Drugs, 13 , pp. 3809-3835 . doi:10.3390/md13063809 <https://doi.org/10.3390/md13063809> , hdl:10013/epic.45670 EPIC3Marine Drugs, MDPI AG, 13, pp. 3809-3835, ISSN: 1660-3397 Article isiRev 2015 ftawi https://doi.org/10.3390/md13063809 2024-06-24T04:12:21Z Diatoms of the genus Pseudo-nitzschia produce domoic acid (DA), a toxin that is vectored in the marine food web, thus causing serious problems for marine organisms and humans. In spite of this, knowledge of interactions between grazing zooplankton and diatoms is restricted. In this study, we examined the interactions between Calanus copepodites and toxin producing Pseudo-nitzschia. The copepodites were fed with different concentrations of toxic P. seriata and a strain of P. obtusa that previously was tested to be non-toxic. The ingestion rates did not differ among the diets (P. seriata, P. obtusa, a mixture of both species), and they accumulated 6%–16% of ingested DA (up to 420 μg per dry weight copepodite). When P. seriata was exposed to the copepodites, either through physical contact with the grazers or separated by a membrane, the toxicity of P. seriata increased (up to 3300%) suggesting the response to be chemically mediated. The induced response was also triggered when copepodites grazed on another diatom, supporting the hypothesis that the cues originate from the copepodite. Neither pH nor nutrient concentrations explained the induced DA production. Unexpectedly, P. obtusa also produced DA when exposed to grazing copepodites, thus representing the second reported toxic polar diatom. Article in Journal/Newspaper Arctic Zooplankton Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Marine Drugs 13 6 3809 3835 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Diatoms of the genus Pseudo-nitzschia produce domoic acid (DA), a toxin that is vectored in the marine food web, thus causing serious problems for marine organisms and humans. In spite of this, knowledge of interactions between grazing zooplankton and diatoms is restricted. In this study, we examined the interactions between Calanus copepodites and toxin producing Pseudo-nitzschia. The copepodites were fed with different concentrations of toxic P. seriata and a strain of P. obtusa that previously was tested to be non-toxic. The ingestion rates did not differ among the diets (P. seriata, P. obtusa, a mixture of both species), and they accumulated 6%–16% of ingested DA (up to 420 μg per dry weight copepodite). When P. seriata was exposed to the copepodites, either through physical contact with the grazers or separated by a membrane, the toxicity of P. seriata increased (up to 3300%) suggesting the response to be chemically mediated. The induced response was also triggered when copepodites grazed on another diatom, supporting the hypothesis that the cues originate from the copepodite. Neither pH nor nutrient concentrations explained the induced DA production. Unexpectedly, P. obtusa also produced DA when exposed to grazing copepodites, thus representing the second reported toxic polar diatom. |
format |
Article in Journal/Newspaper |
author |
Hardardottir, Sara Pančić, Marina Tammilehto, Anna Krock, Bernd Møller, Eva Friis Nielsen, Torkel Gissel Lundholm, Nina |
spellingShingle |
Hardardottir, Sara Pančić, Marina Tammilehto, Anna Krock, Bernd Møller, Eva Friis Nielsen, Torkel Gissel Lundholm, Nina Dangerous Relations in the Arctic Marine Food Web: Interactions between Toxin Producing Pseudo-nitzschia Diatoms and Calanus Copepodites |
author_facet |
Hardardottir, Sara Pančić, Marina Tammilehto, Anna Krock, Bernd Møller, Eva Friis Nielsen, Torkel Gissel Lundholm, Nina |
author_sort |
Hardardottir, Sara |
title |
Dangerous Relations in the Arctic Marine Food Web: Interactions between Toxin Producing Pseudo-nitzschia Diatoms and Calanus Copepodites |
title_short |
Dangerous Relations in the Arctic Marine Food Web: Interactions between Toxin Producing Pseudo-nitzschia Diatoms and Calanus Copepodites |
title_full |
Dangerous Relations in the Arctic Marine Food Web: Interactions between Toxin Producing Pseudo-nitzschia Diatoms and Calanus Copepodites |
title_fullStr |
Dangerous Relations in the Arctic Marine Food Web: Interactions between Toxin Producing Pseudo-nitzschia Diatoms and Calanus Copepodites |
title_full_unstemmed |
Dangerous Relations in the Arctic Marine Food Web: Interactions between Toxin Producing Pseudo-nitzschia Diatoms and Calanus Copepodites |
title_sort |
dangerous relations in the arctic marine food web: interactions between toxin producing pseudo-nitzschia diatoms and calanus copepodites |
publisher |
MDPI AG |
publishDate |
2015 |
url |
https://epic.awi.de/id/eprint/38242/ https://epic.awi.de/id/eprint/38242/1/Hardardottir_2015.pdf https://hdl.handle.net/10013/epic.45670 https://hdl.handle.net/10013/epic.45670.d001 |
genre |
Arctic Zooplankton |
genre_facet |
Arctic Zooplankton |
op_source |
EPIC3Marine Drugs, MDPI AG, 13, pp. 3809-3835, ISSN: 1660-3397 |
op_relation |
https://epic.awi.de/id/eprint/38242/1/Hardardottir_2015.pdf https://hdl.handle.net/10013/epic.45670.d001 Hardardottir, S. , Pančić, M. , Tammilehto, A. , Krock, B. orcid:0000-0003-4022-9101 , Møller, E. F. , Nielsen, T. G. and Lundholm, N. (2015) Dangerous Relations in the Arctic Marine Food Web: Interactions between Toxin Producing Pseudo-nitzschia Diatoms and Calanus Copepodites , Marine Drugs, 13 , pp. 3809-3835 . doi:10.3390/md13063809 <https://doi.org/10.3390/md13063809> , hdl:10013/epic.45670 |
op_doi |
https://doi.org/10.3390/md13063809 |
container_title |
Marine Drugs |
container_volume |
13 |
container_issue |
6 |
container_start_page |
3809 |
op_container_end_page |
3835 |
_version_ |
1810293400787746816 |