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, whi...
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Norwegian Polar Institute
2023
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Online Access: | https://doi.org/10.33265/polar.v42.9584 https://doaj.org/article/d36d1a7d87be43c78cdab4ef4446767c |
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ftdoajarticles:oai:doaj.org/article:d36d1a7d87be43c78cdab4ef4446767c 2023-11-05T03:39:59+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 Takahito Ikenoue Kjell R. Bjørklund Anders K. Krabberød Shigeto Nishino Paul Wassmann 2023-09-01T00:00:00Z https://doi.org/10.33265/polar.v42.9584 https://doaj.org/article/d36d1a7d87be43c78cdab4ef4446767c EN eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/9584/16228 https://doaj.org/toc/0800-0395 https://doaj.org/toc/1751-8369 0800-0395 1751-8369 doi:10.33265/polar.v42.9584 https://doaj.org/article/d36d1a7d87be43c78cdab4ef4446767c Polar Research, Vol 42, Pp 1-17 (2023) zooplankton biogeochemical cycle climate change biodiversity amphimelissa setosa local extinction Environmental sciences GE1-350 Oceanography GC1-1581 article 2023 ftdoajarticles https://doi.org/10.33265/polar.v42.9584 2023-10-08T00:35:21Z 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 Zooplankton Directory of Open Access Journals: DOAJ Articles Polar Research 42 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
zooplankton biogeochemical cycle climate change biodiversity amphimelissa setosa local extinction Environmental sciences GE1-350 Oceanography GC1-1581 |
spellingShingle |
zooplankton biogeochemical cycle climate change biodiversity amphimelissa setosa local extinction Environmental sciences GE1-350 Oceanography GC1-1581 Takahito Ikenoue Kjell R. Bjørklund Anders K. Krabberød Shigeto Nishino Paul 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 |
topic_facet |
zooplankton biogeochemical cycle climate change biodiversity amphimelissa setosa local extinction Environmental sciences GE1-350 Oceanography GC1-1581 |
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 |
Takahito Ikenoue Kjell R. Bjørklund Anders K. Krabberød Shigeto Nishino Paul Wassmann |
author_facet |
Takahito Ikenoue Kjell R. Bjørklund Anders K. Krabberød Shigeto Nishino Paul Wassmann |
author_sort |
Takahito Ikenoue |
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://doi.org/10.33265/polar.v42.9584 https://doaj.org/article/d36d1a7d87be43c78cdab4ef4446767c |
genre |
Arctic Balsfjord Climate change Malangen Polar Research Zooplankton |
genre_facet |
Arctic Balsfjord Climate change Malangen Polar Research Zooplankton |
op_source |
Polar Research, Vol 42, Pp 1-17 (2023) |
op_relation |
https://polarresearch.net/index.php/polar/article/view/9584/16228 https://doaj.org/toc/0800-0395 https://doaj.org/toc/1751-8369 0800-0395 1751-8369 doi:10.33265/polar.v42.9584 https://doaj.org/article/d36d1a7d87be43c78cdab4ef4446767c |
op_doi |
https://doi.org/10.33265/polar.v42.9584 |
container_title |
Polar Research |
container_volume |
42 |
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1781695935342968832 |