Radiolaria and Phaeodaria (siliceous Rhizaria) in south-western and northern Norwegian fjords during late summer 2016: dominant species and biomass in shallow-water assemblages

To determine the present-day community composition of siliceous Rhizaria (Radiolaria and Phaeodaria) in Norwegian fjords, plankton tows were conducted in south-western and northern Norwegian fjords in September 2016. The mean total abundance of radiolarians was 306 m –3 in the Sognefjord complex, wh...

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Published in:Polar Research
Main Authors: Ikenoue, Takahito, Bjørklund, Kjell Rasmus, Krabberød, Anders Kristian, Nishino, Shigeto, Wassmann, Paul
Format: Article in Journal/Newspaper
Language:English
Published: Norwegian Polar Institute 2023
Subjects:
Online Access:https://hdl.handle.net/10037/31546
https://doi.org/10.33265/polar.v42.9584
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spelling ftunivtroemsoe:oai:munin.uit.no:10037/31546 2023-11-12T04:13:40+01:00 Radiolaria and Phaeodaria (siliceous Rhizaria) in south-western and northern Norwegian fjords during late summer 2016: dominant species and biomass in shallow-water assemblages Ikenoue, Takahito Bjørklund, Kjell Rasmus Krabberød, Anders Kristian Nishino, Shigeto Wassmann, Paul 2023-09-21 https://hdl.handle.net/10037/31546 https://doi.org/10.33265/polar.v42.9584 eng eng Norwegian Polar Institute Polar Research Ikenoue, Bjørklund, Krabberød, Nishino, Wassmann. Radiolaria and Phaeodaria (siliceous Rhizaria) in south-western and northern Norwegian fjords during late summer 2016: dominant species and biomass in shallow-water assemblages. Polar Research. 2023;42 FRIDAID 2183654 doi:10.33265/polar.v42.9584 0800-0395 1751-8369 https://hdl.handle.net/10037/31546 Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by-nc/4.0 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2023 ftunivtroemsoe https://doi.org/10.33265/polar.v42.9584 2023-10-18T23:07:50Z To determine the present-day community composition of siliceous Rhizaria (Radiolaria and Phaeodaria) in Norwegian fjords, plankton tows were conducted in south-western and northern Norwegian fjords in September 2016. The mean total abundance of radiolarians was 306 m –3 in the Sognefjord complex, which was the southern research site, and, in the north, 945 m –3 in Malangen and 89 m –3 in Balsfjord, both above the Arctic Circle. Sticholonche zanclea was the most abundant radiolarian in the Sognefjord complex and Malangen, accounting for 78–100% (mean 89%) of radiolarian abundance. The mean total abundance of phaeodarians was 1554 m –3 in the Sognefjord complex, 51 m –3 in Malangen and 11 m –3 in Balsfjord. Medusetta arcifera was the most abundant phaeodaria in the Sognefjord complex, accounting for >99% of phaeodarian abundance, but was absent in Malangen and Balsfjord, where Protocystis tridens accounted for >96% of phaeodarian abundance. The carbon biomass of S. zanclea and M. arcifera was 188 and 438 µg C m –3 , respectively, which is similar to and 8.6 times higher than, respectively, that of phaeodarians >1 mm in the western North Pacific, suggesting that M. arcifera contributes to organic carbon transport in the Sognefjord complex. Amphimelissa setosa (Nassellaria, Radiolaria), which was a dominant species in the study area in 1982–83, was absent in the present study in all sampled fjords. This could have been caused by the approximately 2 °C increase in water temperature that has occurred since 1990 and can be taken as evidence of a climate-change-associated local temperature rise linked to the warming of advected Atlantic Water. Article in Journal/Newspaper Arctic Balsfjord Climate change Malangen Polar Research University of Tromsø: Munin Open Research Archive Arctic Balsfjord ENVELOPE(19.227,19.227,69.240,69.240) Malangen ENVELOPE(18.598,18.598,69.400,69.400) Pacific Polar Research 42
institution Open Polar
collection University of Tromsø: Munin Open Research Archive
op_collection_id ftunivtroemsoe
language English
description To determine the present-day community composition of siliceous Rhizaria (Radiolaria and Phaeodaria) in Norwegian fjords, plankton tows were conducted in south-western and northern Norwegian fjords in September 2016. The mean total abundance of radiolarians was 306 m –3 in the Sognefjord complex, which was the southern research site, and, in the north, 945 m –3 in Malangen and 89 m –3 in Balsfjord, both above the Arctic Circle. Sticholonche zanclea was the most abundant radiolarian in the Sognefjord complex and Malangen, accounting for 78–100% (mean 89%) of radiolarian abundance. The mean total abundance of phaeodarians was 1554 m –3 in the Sognefjord complex, 51 m –3 in Malangen and 11 m –3 in Balsfjord. Medusetta arcifera was the most abundant phaeodaria in the Sognefjord complex, accounting for >99% of phaeodarian abundance, but was absent in Malangen and Balsfjord, where Protocystis tridens accounted for >96% of phaeodarian abundance. The carbon biomass of S. zanclea and M. arcifera was 188 and 438 µg C m –3 , respectively, which is similar to and 8.6 times higher than, respectively, that of phaeodarians >1 mm in the western North Pacific, suggesting that M. arcifera contributes to organic carbon transport in the Sognefjord complex. Amphimelissa setosa (Nassellaria, Radiolaria), which was a dominant species in the study area in 1982–83, was absent in the present study in all sampled fjords. This could have been caused by the approximately 2 °C increase in water temperature that has occurred since 1990 and can be taken as evidence of a climate-change-associated local temperature rise linked to the warming of advected Atlantic Water.
format Article in Journal/Newspaper
author Ikenoue, Takahito
Bjørklund, Kjell Rasmus
Krabberød, Anders Kristian
Nishino, Shigeto
Wassmann, Paul
spellingShingle Ikenoue, Takahito
Bjørklund, Kjell Rasmus
Krabberød, Anders Kristian
Nishino, Shigeto
Wassmann, Paul
Radiolaria and Phaeodaria (siliceous Rhizaria) in south-western and northern Norwegian fjords during late summer 2016: dominant species and biomass in shallow-water assemblages
author_facet Ikenoue, Takahito
Bjørklund, Kjell Rasmus
Krabberød, Anders Kristian
Nishino, Shigeto
Wassmann, Paul
author_sort Ikenoue, Takahito
title Radiolaria and Phaeodaria (siliceous Rhizaria) in south-western and northern Norwegian fjords during late summer 2016: dominant species and biomass in shallow-water assemblages
title_short Radiolaria and Phaeodaria (siliceous Rhizaria) in south-western and northern Norwegian fjords during late summer 2016: dominant species and biomass in shallow-water assemblages
title_full Radiolaria and Phaeodaria (siliceous Rhizaria) in south-western and northern Norwegian fjords during late summer 2016: dominant species and biomass in shallow-water assemblages
title_fullStr Radiolaria and Phaeodaria (siliceous Rhizaria) in south-western and northern Norwegian fjords during late summer 2016: dominant species and biomass in shallow-water assemblages
title_full_unstemmed Radiolaria and Phaeodaria (siliceous Rhizaria) in south-western and northern Norwegian fjords during late summer 2016: dominant species and biomass in shallow-water assemblages
title_sort radiolaria and phaeodaria (siliceous rhizaria) in south-western and northern norwegian fjords during late summer 2016: dominant species and biomass in shallow-water assemblages
publisher Norwegian Polar Institute
publishDate 2023
url https://hdl.handle.net/10037/31546
https://doi.org/10.33265/polar.v42.9584
long_lat ENVELOPE(19.227,19.227,69.240,69.240)
ENVELOPE(18.598,18.598,69.400,69.400)
geographic Arctic
Balsfjord
Malangen
Pacific
geographic_facet Arctic
Balsfjord
Malangen
Pacific
genre Arctic
Balsfjord
Climate change
Malangen
Polar Research
genre_facet Arctic
Balsfjord
Climate change
Malangen
Polar Research
op_relation Polar Research
Ikenoue, Bjørklund, Krabberød, Nishino, Wassmann. Radiolaria and Phaeodaria (siliceous Rhizaria) in south-western and northern Norwegian fjords during late summer 2016: dominant species and biomass in shallow-water assemblages. Polar Research. 2023;42
FRIDAID 2183654
doi:10.33265/polar.v42.9584
0800-0395
1751-8369
https://hdl.handle.net/10037/31546
op_rights Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
openAccess
Copyright 2023 The Author(s)
https://creativecommons.org/licenses/by-nc/4.0
op_doi https://doi.org/10.33265/polar.v42.9584
container_title Polar Research
container_volume 42
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