Seasonal variability in non-consumptive mortality of Arctic zooplankton
Recent observations from high-latitude marine ecosystems indicate that non-consumptive mortality may be particularly high in Arctic zooplankton during the polar night. Here we have estimated the contribution of dead organisms to the mesozooplankton community in the high Arctic (Svalbard 78–81(o)N) d...
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ftpubmed:oai:pubmedcentral.nih.gov:8315232 2023-05-15T14:48:08+02:00 Seasonal variability in non-consumptive mortality of Arctic zooplankton Daase, Malin Søreide, Janne E 2021-06-04 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8315232/ https://doi.org/10.1093/plankt/fbab042 en eng Oxford University Press http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8315232/ http://dx.doi.org/10.1093/plankt/fbab042 © The Author(s) 2021. Published by Oxford University Press. https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. CC-BY J Plankton Res Original Article Text 2021 ftpubmed https://doi.org/10.1093/plankt/fbab042 2021-08-01T00:59:03Z Recent observations from high-latitude marine ecosystems indicate that non-consumptive mortality may be particularly high in Arctic zooplankton during the polar night. Here we have estimated the contribution of dead organisms to the mesozooplankton community in the high Arctic (Svalbard 78–81(o)N) during the polar night (January), in spring (May) and in late summer (end of August). To identify in situ dead organisms, we used Neutral Red Stain. The dead zooplankton fraction consisted mainly of copepods, while the contribution of dead non-copepods was low in all seasons. The absolute abundance of dead copepods varied little between seasons; however, the relative contribution of dead copepods was highest in January with 11–35% of the copepods classified as dead, in contrast to 2–12% in spring and summer. Furthermore, there were species-specific differences: copepods of the genus Calanus contributed more to the dead fraction of the copepod community during the polar night compared to spring and summer, leading to a higher “dead” biomass in winter. We conclude that non-consumptive winter mortality is considerable in calanoid copepods in the Arctic and an important but so far neglected component of the passive carbon flux, providing carbon in larger portions for higher trophic level consumers during the low-productive winter. Text Arctic Mesozooplankton polar night Svalbard Zooplankton Copepods PubMed Central (PMC) Arctic Svalbard Journal of Plankton Research 43 4 565 585 |
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PubMed Central (PMC) |
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ftpubmed |
language |
English |
topic |
Original Article |
spellingShingle |
Original Article Daase, Malin Søreide, Janne E Seasonal variability in non-consumptive mortality of Arctic zooplankton |
topic_facet |
Original Article |
description |
Recent observations from high-latitude marine ecosystems indicate that non-consumptive mortality may be particularly high in Arctic zooplankton during the polar night. Here we have estimated the contribution of dead organisms to the mesozooplankton community in the high Arctic (Svalbard 78–81(o)N) during the polar night (January), in spring (May) and in late summer (end of August). To identify in situ dead organisms, we used Neutral Red Stain. The dead zooplankton fraction consisted mainly of copepods, while the contribution of dead non-copepods was low in all seasons. The absolute abundance of dead copepods varied little between seasons; however, the relative contribution of dead copepods was highest in January with 11–35% of the copepods classified as dead, in contrast to 2–12% in spring and summer. Furthermore, there were species-specific differences: copepods of the genus Calanus contributed more to the dead fraction of the copepod community during the polar night compared to spring and summer, leading to a higher “dead” biomass in winter. We conclude that non-consumptive winter mortality is considerable in calanoid copepods in the Arctic and an important but so far neglected component of the passive carbon flux, providing carbon in larger portions for higher trophic level consumers during the low-productive winter. |
format |
Text |
author |
Daase, Malin Søreide, Janne E |
author_facet |
Daase, Malin Søreide, Janne E |
author_sort |
Daase, Malin |
title |
Seasonal variability in non-consumptive mortality of Arctic zooplankton |
title_short |
Seasonal variability in non-consumptive mortality of Arctic zooplankton |
title_full |
Seasonal variability in non-consumptive mortality of Arctic zooplankton |
title_fullStr |
Seasonal variability in non-consumptive mortality of Arctic zooplankton |
title_full_unstemmed |
Seasonal variability in non-consumptive mortality of Arctic zooplankton |
title_sort |
seasonal variability in non-consumptive mortality of arctic zooplankton |
publisher |
Oxford University Press |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8315232/ https://doi.org/10.1093/plankt/fbab042 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Mesozooplankton polar night Svalbard Zooplankton Copepods |
genre_facet |
Arctic Mesozooplankton polar night Svalbard Zooplankton Copepods |
op_source |
J Plankton Res |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8315232/ http://dx.doi.org/10.1093/plankt/fbab042 |
op_rights |
© The Author(s) 2021. Published by Oxford University Press. https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1093/plankt/fbab042 |
container_title |
Journal of Plankton Research |
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43 |
container_issue |
4 |
container_start_page |
565 |
op_container_end_page |
585 |
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1766319213835714560 |