Contribution of Calanus species to the mesozooplankton biomass in the Barents Sea
Abstract Copepods from the genus Calanus are crucial prey for fish, seabirds and mammals in the Nordic and Barents Sea ecosystems. The objective of this study is to determine the contribution of Calanus species to the mesozooplankton biomass in the Barents Sea. We analyse an extensive dataset of Cal...
Published in: | ICES Journal of Marine Science |
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2017
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsx221 http://academic.oup.com/icesjms/article-pdf/75/7/2342/31236988/fsx221.pdf |
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croxfordunivpr:10.1093/icesjms/fsx221 2024-09-30T14:30:36+00:00 Contribution of Calanus species to the mesozooplankton biomass in the Barents Sea Aarflot, Johanna Myrseth Skjoldal, Hein Rune Dalpadado, Padmini Skern-Mauritzen, Mette Fields, David Norwegian Research Council Integrated Ecosystem Assessment 2017 http://dx.doi.org/10.1093/icesjms/fsx221 http://academic.oup.com/icesjms/article-pdf/75/7/2342/31236988/fsx221.pdf en eng Oxford University Press (OUP) http://creativecommons.org/licenses/by/4.0/ ICES Journal of Marine Science volume 75, issue 7, page 2342-2354 ISSN 1054-3139 1095-9289 journal-article 2017 croxfordunivpr https://doi.org/10.1093/icesjms/fsx221 2024-09-10T04:15:19Z Abstract Copepods from the genus Calanus are crucial prey for fish, seabirds and mammals in the Nordic and Barents Sea ecosystems. The objective of this study is to determine the contribution of Calanus species to the mesozooplankton biomass in the Barents Sea. We analyse an extensive dataset of Calanus finmarchicus, Calanus glacialis, and Calanus hyperboreus, collected at various research surveys over a 30-year period. Our results show that the Calanus species are a main driver of variation in the mesozooplankton biomass in the Barents Sea, and constitutes around 80% of the total. The proportion of Calanus decreases at low zooplankton biomass, possibly due to a combination of advective processes (low C. finmarchicus in winter) and size selective foraging. Though the Calanus species co-occur in most regions, C. glacialis dominates in the Arctic water masses, while C. finmarchicus dominates in Atlantic waters. The larger C. hyperboreus has considerably lower biomass in the Barents Sea than the other Calanus species. Stages CIV and CV have the largest contribution to Calanus species biomass, whereas stages CI-CIII have an overall low impact on the biomass. In the western area of the Barents Sea, we observe indications of an ongoing borealization of the zooplankton community, with a decreasing proportion of the Arctic C. glacialis over the past 20 years. Atlantic C. finmarchicus have increased during the same period. Article in Journal/Newspaper Arctic Barents Sea Calanus finmarchicus Calanus glacialis Calanus hyperboreus Zooplankton Copepods Oxford University Press Arctic Barents Sea ICES Journal of Marine Science 75 7 2342 2354 |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract Copepods from the genus Calanus are crucial prey for fish, seabirds and mammals in the Nordic and Barents Sea ecosystems. The objective of this study is to determine the contribution of Calanus species to the mesozooplankton biomass in the Barents Sea. We analyse an extensive dataset of Calanus finmarchicus, Calanus glacialis, and Calanus hyperboreus, collected at various research surveys over a 30-year period. Our results show that the Calanus species are a main driver of variation in the mesozooplankton biomass in the Barents Sea, and constitutes around 80% of the total. The proportion of Calanus decreases at low zooplankton biomass, possibly due to a combination of advective processes (low C. finmarchicus in winter) and size selective foraging. Though the Calanus species co-occur in most regions, C. glacialis dominates in the Arctic water masses, while C. finmarchicus dominates in Atlantic waters. The larger C. hyperboreus has considerably lower biomass in the Barents Sea than the other Calanus species. Stages CIV and CV have the largest contribution to Calanus species biomass, whereas stages CI-CIII have an overall low impact on the biomass. In the western area of the Barents Sea, we observe indications of an ongoing borealization of the zooplankton community, with a decreasing proportion of the Arctic C. glacialis over the past 20 years. Atlantic C. finmarchicus have increased during the same period. |
author2 |
Fields, David Norwegian Research Council Integrated Ecosystem Assessment |
format |
Article in Journal/Newspaper |
author |
Aarflot, Johanna Myrseth Skjoldal, Hein Rune Dalpadado, Padmini Skern-Mauritzen, Mette |
spellingShingle |
Aarflot, Johanna Myrseth Skjoldal, Hein Rune Dalpadado, Padmini Skern-Mauritzen, Mette Contribution of Calanus species to the mesozooplankton biomass in the Barents Sea |
author_facet |
Aarflot, Johanna Myrseth Skjoldal, Hein Rune Dalpadado, Padmini Skern-Mauritzen, Mette |
author_sort |
Aarflot, Johanna Myrseth |
title |
Contribution of Calanus species to the mesozooplankton biomass in the Barents Sea |
title_short |
Contribution of Calanus species to the mesozooplankton biomass in the Barents Sea |
title_full |
Contribution of Calanus species to the mesozooplankton biomass in the Barents Sea |
title_fullStr |
Contribution of Calanus species to the mesozooplankton biomass in the Barents Sea |
title_full_unstemmed |
Contribution of Calanus species to the mesozooplankton biomass in the Barents Sea |
title_sort |
contribution of calanus species to the mesozooplankton biomass in the barents sea |
publisher |
Oxford University Press (OUP) |
publishDate |
2017 |
url |
http://dx.doi.org/10.1093/icesjms/fsx221 http://academic.oup.com/icesjms/article-pdf/75/7/2342/31236988/fsx221.pdf |
geographic |
Arctic Barents Sea |
geographic_facet |
Arctic Barents Sea |
genre |
Arctic Barents Sea Calanus finmarchicus Calanus glacialis Calanus hyperboreus Zooplankton Copepods |
genre_facet |
Arctic Barents Sea Calanus finmarchicus Calanus glacialis Calanus hyperboreus Zooplankton Copepods |
op_source |
ICES Journal of Marine Science volume 75, issue 7, page 2342-2354 ISSN 1054-3139 1095-9289 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1093/icesjms/fsx221 |
container_title |
ICES Journal of Marine Science |
container_volume |
75 |
container_issue |
7 |
container_start_page |
2342 |
op_container_end_page |
2354 |
_version_ |
1811635472725704704 |