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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ftdoajarticles:oai:doaj.org/article:8f990b2b0f4340bda431100c4c75a43e 2023-05-15T15:08:34+02:00 Dangerous Relations in the Arctic Marine Food Web: Interactions between Toxin Producing Pseudo-nitzschia Diatoms and Calanus Copepodites Sara Harðardóttir Marina Pančić Anna Tammilehto Bernd Krock Eva Friis Møller Torkel Gissel Nielsen Nina Lundholm 2015-06-01T00:00:00Z https://doi.org/10.3390/md13063809 https://doaj.org/article/8f990b2b0f4340bda431100c4c75a43e EN eng MDPI AG http://www.mdpi.com/1660-3397/13/6/3809 https://doaj.org/toc/1660-3397 1660-3397 doi:10.3390/md13063809 https://doaj.org/article/8f990b2b0f4340bda431100c4c75a43e Marine Drugs, Vol 13, Iss 6, Pp 3809-3835 (2015) Calanus copepodites Pseudo-nitzschia seriata P. obtusa grazing induction chemical ecology toxin production domoic acid Biology (General) QH301-705.5 article 2015 ftdoajarticles https://doi.org/10.3390/md13063809 2022-12-30T20:42:57Z 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 Directory of Open Access Journals: DOAJ Articles Arctic Marine Drugs 13 6 3809 3835 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Calanus copepodites Pseudo-nitzschia seriata P. obtusa grazing induction chemical ecology toxin production domoic acid Biology (General) QH301-705.5 |
spellingShingle |
Calanus copepodites Pseudo-nitzschia seriata P. obtusa grazing induction chemical ecology toxin production domoic acid Biology (General) QH301-705.5 Sara Harðardóttir Marina Pančić Anna Tammilehto Bernd Krock Eva Friis Møller Torkel Gissel Nielsen Nina Lundholm Dangerous Relations in the Arctic Marine Food Web: Interactions between Toxin Producing Pseudo-nitzschia Diatoms and Calanus Copepodites |
topic_facet |
Calanus copepodites Pseudo-nitzschia seriata P. obtusa grazing induction chemical ecology toxin production domoic acid Biology (General) QH301-705.5 |
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 |
Sara Harðardóttir Marina Pančić Anna Tammilehto Bernd Krock Eva Friis Møller Torkel Gissel Nielsen Nina Lundholm |
author_facet |
Sara Harðardóttir Marina Pančić Anna Tammilehto Bernd Krock Eva Friis Møller Torkel Gissel Nielsen Nina Lundholm |
author_sort |
Sara Harðardóttir |
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://doi.org/10.3390/md13063809 https://doaj.org/article/8f990b2b0f4340bda431100c4c75a43e |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Zooplankton |
genre_facet |
Arctic Zooplankton |
op_source |
Marine Drugs, Vol 13, Iss 6, Pp 3809-3835 (2015) |
op_relation |
http://www.mdpi.com/1660-3397/13/6/3809 https://doaj.org/toc/1660-3397 1660-3397 doi:10.3390/md13063809 https://doaj.org/article/8f990b2b0f4340bda431100c4c75a43e |
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_ |
1766339899366047744 |