Surface aggregations of Calanus finmarchicus during the polar night
While marine ecosystems in polar areas were thought to be mostly inactive during the polar night, recent observations in the Arctic highlight that dynamic biological interactions occur across all trophic levels. One particularly interesting observation made repeatedly is the occurrence of Calanus fi...
Published in: | ICES Journal of Marine Science |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Oxford University Press
2022
|
Subjects: | |
Online Access: | https://hdl.handle.net/10037/26358 https://doi.org/10.1093/icesjms/fsac030 |
id |
ftunivtroemsoe:oai:munin.uit.no:10037/26358 |
---|---|
record_format |
openpolar |
spelling |
ftunivtroemsoe:oai:munin.uit.no:10037/26358 2023-05-15T14:24:50+02:00 Surface aggregations of Calanus finmarchicus during the polar night Espinasse, Boris Dristan Daase, Malin Halvorsen, Elisabeth Reigstad, Marit Berge, Jørgen Basedow, Sünnje Linnéa 2022-03-16 https://hdl.handle.net/10037/26358 https://doi.org/10.1093/icesjms/fsac030 eng eng Oxford University Press ICES Journal of Marine Science Norges forskningsråd: 226417 Norges forskningsråd: 244319 Norges forskningsråd: 300333 Norges forskningsråd: 268391 Norges forskningsråd: 226415 EC/H2020: 894296 Tromsø forskningsstiftelse: Arctic ABC-E FRIDAID 2014468 doi:10.1093/icesjms/fsac030 1054-3139 1095-9289 https://hdl.handle.net/10037/26358 openAccess Copyright 2022 The Author(s) Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2022 ftunivtroemsoe https://doi.org/10.1093/icesjms/fsac030 2022-08-24T23:00:00Z While marine ecosystems in polar areas were thought to be mostly inactive during the polar night, recent observations in the Arctic highlight that dynamic biological interactions occur across all trophic levels. One particularly interesting observation made repeatedly is the occurrence of Calanus finmarchicus, a key species at the base of the food web, in the upper part of the water column in early January. This contrasts with the confirmed life cycle of this copepod, which predicts descent to overwintering depths in autumn and ascent at the end of the winter. Here, we compiled 6 years of data from the polar night to explore this unusual behaviour and to investigate the underlying mechanisms that may cause these surface aggregations. Highest abundance of C. finmarchicus in surface waters was closely related to Polar Surface Water in the vicinity of the sea ice edge. A total of six hypotheses are assessed to explain this distribution pattern, which includes passive transport and active behaviour as a way to improve survival chances or food access. In the context of climate change and sea ice decrease, the presence of lipid-rich copepods in cold surface waters could be a key parameter in driving the spatial distributions of top predators in the Arctic. Article in Journal/Newspaper Arctic Arctic Calanus finmarchicus Climate change polar night Sea ice Copepods University of Tromsø: Munin Open Research Archive Arctic ICES Journal of Marine Science 79 3 803 814 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
description |
While marine ecosystems in polar areas were thought to be mostly inactive during the polar night, recent observations in the Arctic highlight that dynamic biological interactions occur across all trophic levels. One particularly interesting observation made repeatedly is the occurrence of Calanus finmarchicus, a key species at the base of the food web, in the upper part of the water column in early January. This contrasts with the confirmed life cycle of this copepod, which predicts descent to overwintering depths in autumn and ascent at the end of the winter. Here, we compiled 6 years of data from the polar night to explore this unusual behaviour and to investigate the underlying mechanisms that may cause these surface aggregations. Highest abundance of C. finmarchicus in surface waters was closely related to Polar Surface Water in the vicinity of the sea ice edge. A total of six hypotheses are assessed to explain this distribution pattern, which includes passive transport and active behaviour as a way to improve survival chances or food access. In the context of climate change and sea ice decrease, the presence of lipid-rich copepods in cold surface waters could be a key parameter in driving the spatial distributions of top predators in the Arctic. |
format |
Article in Journal/Newspaper |
author |
Espinasse, Boris Dristan Daase, Malin Halvorsen, Elisabeth Reigstad, Marit Berge, Jørgen Basedow, Sünnje Linnéa |
spellingShingle |
Espinasse, Boris Dristan Daase, Malin Halvorsen, Elisabeth Reigstad, Marit Berge, Jørgen Basedow, Sünnje Linnéa Surface aggregations of Calanus finmarchicus during the polar night |
author_facet |
Espinasse, Boris Dristan Daase, Malin Halvorsen, Elisabeth Reigstad, Marit Berge, Jørgen Basedow, Sünnje Linnéa |
author_sort |
Espinasse, Boris Dristan |
title |
Surface aggregations of Calanus finmarchicus during the polar night |
title_short |
Surface aggregations of Calanus finmarchicus during the polar night |
title_full |
Surface aggregations of Calanus finmarchicus during the polar night |
title_fullStr |
Surface aggregations of Calanus finmarchicus during the polar night |
title_full_unstemmed |
Surface aggregations of Calanus finmarchicus during the polar night |
title_sort |
surface aggregations of calanus finmarchicus during the polar night |
publisher |
Oxford University Press |
publishDate |
2022 |
url |
https://hdl.handle.net/10037/26358 https://doi.org/10.1093/icesjms/fsac030 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Calanus finmarchicus Climate change polar night Sea ice Copepods |
genre_facet |
Arctic Arctic Calanus finmarchicus Climate change polar night Sea ice Copepods |
op_relation |
ICES Journal of Marine Science Norges forskningsråd: 226417 Norges forskningsråd: 244319 Norges forskningsråd: 300333 Norges forskningsråd: 268391 Norges forskningsråd: 226415 EC/H2020: 894296 Tromsø forskningsstiftelse: Arctic ABC-E FRIDAID 2014468 doi:10.1093/icesjms/fsac030 1054-3139 1095-9289 https://hdl.handle.net/10037/26358 |
op_rights |
openAccess Copyright 2022 The Author(s) |
op_doi |
https://doi.org/10.1093/icesjms/fsac030 |
container_title |
ICES Journal of Marine Science |
container_volume |
79 |
container_issue |
3 |
container_start_page |
803 |
op_container_end_page |
814 |
_version_ |
1766297290531667968 |