Atlantification influences zooplankton communities seasonally in the northern Barents Sea and Arctic Ocea
The Barents Sea is undergoing rapid ocean warming with less sea ice and increased Atlantic inflow, shifting the pelagic ecosystem towards a more boreal one, a process referred to as Atlantification. While such changes have already been documented in the southern and central Barents Sea, less is know...
Published in: | Progress in Oceanography |
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Online Access: | https://hdl.handle.net/10037/31575 https://doi.org/10.1016/j.pocean.2023.103133 |
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ftunivtroemsoe:oai:munin.uit.no:10037/31575 2023-11-12T04:09:49+01:00 Atlantification influences zooplankton communities seasonally in the northern Barents Sea and Arctic Ocea Wold, Anette Hop, Haakon Svensen, Camilla Søreide, Janne Assmann, Karen Ormańczyk, M.R. Kwasniewski, S 2023-09-29 https://hdl.handle.net/10037/31575 https://doi.org/10.1016/j.pocean.2023.103133 eng eng Elsevier Progress in Oceanography Wold, Hop, Svensen, Søreide, Assmann, Ormańczyk, Kwasniewski. Atlantification influences zooplankton communities seasonally in the northern Barents Sea and Arctic Ocea. Progress in Oceanography. 2023 FRIDAID 2185188 doi:10.1016/j.pocean.2023.103133 0079-6611 1873-4472 https://hdl.handle.net/10037/31575 Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by/4.0 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2023 ftunivtroemsoe https://doi.org/10.1016/j.pocean.2023.103133 2023-10-18T23:07:50Z The Barents Sea is undergoing rapid ocean warming with less sea ice and increased Atlantic inflow, shifting the pelagic ecosystem towards a more boreal one, a process referred to as Atlantification. While such changes have already been documented in the southern and central Barents Sea, less is known about the degree of Atlantification in the northern Barents Sea and Arctic Ocean. In this seasonal study, we identified the mesozooplankton biodiversity, abundance and biomass in the Northern Barents Sea along a transect with seven stations stretching from the central Barents Sea (76◦N) across the shelf break and into the Arctic Ocean (82◦N) in August and December 2019, and March, May and July 2021. The broad range of mesozooplankton taxa and sizes were collected by conducting duplicate depth-stratified tows using alternate nets of mesh-sizes 64 µm and 180 µm. The majority of zooplankton taxa were ubiquitous in the study area, but the abundances and life stages varied depending on the season, region and the dominant water mass. We identified three distinct biogeographical regions with different zooplankton diversity and seasonal dynamics; (i) south of the Polar Front, (ii) northern Barents Sea shelf, and (iii) shelf slope and Arctic Ocean. During summer, high abundances of Atlantic/boreal and cosmopolitan zooplankton, mainly Calanus finmarchicus, Metridia longa, Oithona similis and Microsetella norvegica were found just south of the Polar Front in the central Barents Sea. On the shelf, Arctic species, such as Calanus glacialis, Pseudocalanus spp., and Limacina helicina dominated year-round with relatively high and stable biomass. At the northernmost stations, peaks of C. finmarchicus and Oncaeidae (Triconia borealis and Oncaea spp.) occurred in winter, combined with bathypelagic species such as Paraeuchaeta spp., Scaphocalanus brevicornis, Spinocalanus spp., Gaetanus brevispinus and Heterorhabdus norvegicus. Hence, when comparing the mesozooplankton communities at the different locations and seasons, four distinct ... Article in Journal/Newspaper Arctic Arctic Arctic Ocean Barents Sea Calanus finmarchicus Calanus glacialis Limacina helicina Mesozooplankton Sea ice Zooplankton University of Tromsø: Munin Open Research Archive Arctic Arctic Ocean Barents Sea Progress in Oceanography 219 103133 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
description |
The Barents Sea is undergoing rapid ocean warming with less sea ice and increased Atlantic inflow, shifting the pelagic ecosystem towards a more boreal one, a process referred to as Atlantification. While such changes have already been documented in the southern and central Barents Sea, less is known about the degree of Atlantification in the northern Barents Sea and Arctic Ocean. In this seasonal study, we identified the mesozooplankton biodiversity, abundance and biomass in the Northern Barents Sea along a transect with seven stations stretching from the central Barents Sea (76◦N) across the shelf break and into the Arctic Ocean (82◦N) in August and December 2019, and March, May and July 2021. The broad range of mesozooplankton taxa and sizes were collected by conducting duplicate depth-stratified tows using alternate nets of mesh-sizes 64 µm and 180 µm. The majority of zooplankton taxa were ubiquitous in the study area, but the abundances and life stages varied depending on the season, region and the dominant water mass. We identified three distinct biogeographical regions with different zooplankton diversity and seasonal dynamics; (i) south of the Polar Front, (ii) northern Barents Sea shelf, and (iii) shelf slope and Arctic Ocean. During summer, high abundances of Atlantic/boreal and cosmopolitan zooplankton, mainly Calanus finmarchicus, Metridia longa, Oithona similis and Microsetella norvegica were found just south of the Polar Front in the central Barents Sea. On the shelf, Arctic species, such as Calanus glacialis, Pseudocalanus spp., and Limacina helicina dominated year-round with relatively high and stable biomass. At the northernmost stations, peaks of C. finmarchicus and Oncaeidae (Triconia borealis and Oncaea spp.) occurred in winter, combined with bathypelagic species such as Paraeuchaeta spp., Scaphocalanus brevicornis, Spinocalanus spp., Gaetanus brevispinus and Heterorhabdus norvegicus. Hence, when comparing the mesozooplankton communities at the different locations and seasons, four distinct ... |
format |
Article in Journal/Newspaper |
author |
Wold, Anette Hop, Haakon Svensen, Camilla Søreide, Janne Assmann, Karen Ormańczyk, M.R. Kwasniewski, S |
spellingShingle |
Wold, Anette Hop, Haakon Svensen, Camilla Søreide, Janne Assmann, Karen Ormańczyk, M.R. Kwasniewski, S Atlantification influences zooplankton communities seasonally in the northern Barents Sea and Arctic Ocea |
author_facet |
Wold, Anette Hop, Haakon Svensen, Camilla Søreide, Janne Assmann, Karen Ormańczyk, M.R. Kwasniewski, S |
author_sort |
Wold, Anette |
title |
Atlantification influences zooplankton communities seasonally in the northern Barents Sea and Arctic Ocea |
title_short |
Atlantification influences zooplankton communities seasonally in the northern Barents Sea and Arctic Ocea |
title_full |
Atlantification influences zooplankton communities seasonally in the northern Barents Sea and Arctic Ocea |
title_fullStr |
Atlantification influences zooplankton communities seasonally in the northern Barents Sea and Arctic Ocea |
title_full_unstemmed |
Atlantification influences zooplankton communities seasonally in the northern Barents Sea and Arctic Ocea |
title_sort |
atlantification influences zooplankton communities seasonally in the northern barents sea and arctic ocea |
publisher |
Elsevier |
publishDate |
2023 |
url |
https://hdl.handle.net/10037/31575 https://doi.org/10.1016/j.pocean.2023.103133 |
geographic |
Arctic Arctic Ocean Barents Sea |
geographic_facet |
Arctic Arctic Ocean Barents Sea |
genre |
Arctic Arctic Arctic Ocean Barents Sea Calanus finmarchicus Calanus glacialis Limacina helicina Mesozooplankton Sea ice Zooplankton |
genre_facet |
Arctic Arctic Arctic Ocean Barents Sea Calanus finmarchicus Calanus glacialis Limacina helicina Mesozooplankton Sea ice Zooplankton |
op_relation |
Progress in Oceanography Wold, Hop, Svensen, Søreide, Assmann, Ormańczyk, Kwasniewski. Atlantification influences zooplankton communities seasonally in the northern Barents Sea and Arctic Ocea. Progress in Oceanography. 2023 FRIDAID 2185188 doi:10.1016/j.pocean.2023.103133 0079-6611 1873-4472 https://hdl.handle.net/10037/31575 |
op_rights |
Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by/4.0 |
op_doi |
https://doi.org/10.1016/j.pocean.2023.103133 |
container_title |
Progress in Oceanography |
container_volume |
219 |
container_start_page |
103133 |
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1782329616433676288 |