Distribution and Abundances of Planktic Foraminifera and Shelled Pteropods During the Polar Night in the Sea-Ice Covered Northern Barents Sea
Planktic foraminfera and shelled pteropods are important calcifying groups of zooplankton in all oceans. Their calcium carbonate shells are sensitive to changes in ocean carbonate chemistry predisposing them as an important indicator of ocean acidification. Moreover, planktic foraminfera and shelled...
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Online Access: | https://hdl.handle.net/11250/2828179 https://doi.org/10.3389/fmars.2021.644094 |
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ftimr:oai:imr.brage.unit.no:11250/2828179 2023-05-15T15:18:56+02:00 Distribution and Abundances of Planktic Foraminifera and Shelled Pteropods During the Polar Night in the Sea-Ice Covered Northern Barents Sea Zamelczyk, Katarzyna Fransson, Agneta Chierici, Melissa Jones, Elizabeth Marie Meilland, Julie Anglada-Ortiz, Griselda Hodal Lødemel, Helene 2021 application/pdf https://hdl.handle.net/11250/2828179 https://doi.org/10.3389/fmars.2021.644094 eng eng Norges forskningsråd: 276730 Frontiers in Marine Science. 2021, 8 1-19. urn:issn:2296-7745 https://hdl.handle.net/11250/2828179 https://doi.org/10.3389/fmars.2021.644094 cristin:1947774 1-19 8 Frontiers in Marine Science Peer reviewed Journal article 2021 ftimr https://doi.org/10.3389/fmars.2021.644094 2021-11-10T23:36:42Z Planktic foraminfera and shelled pteropods are important calcifying groups of zooplankton in all oceans. Their calcium carbonate shells are sensitive to changes in ocean carbonate chemistry predisposing them as an important indicator of ocean acidification. Moreover, planktic foraminfera and shelled pteropods contribute significantly to food webs and vertical flux of calcium carbonate in polar pelagic ecosystems. Here we provide, for the first time, information on the under-ice planktic foraminifera and shelled pteropod abundance, species composition and vertical distribution along a transect (82°–76°N) covering the Nansen Basin and the northern Barents Sea during the polar night in December 2019. The two groups of calcifiers were examined in different environments in the context of water masses, sea ice cover, and ocean chemistry (nutrients and carbonate system). The average abundance of planktic foraminifera under the sea-ice was low with the highest average abundance (2 ind. m–3) close to the sea-ice margin. The maximum abundances of planktic foraminifera were concentrated at 20–50 m depth (4 and 7 ind. m–3) in the Nansen Basin and at 80–100 m depth (13 ind. m–3) close to the sea-ice margin. The highest average abundance (13 ind. m–3) and the maximum abundance of pteropods (40 ind. m–3) were found in the surface Polar Water at 0–20 m depth with very low temperatures (–1.9 to –1°C), low salinity (<34.4) and relatively low aragonite saturation of 1.43–1.68. The lowest aragonite saturation (<1.3) was observed in the bottom water in the northern Barents Sea. The species distribution of these calcifiers reflected the water mass distribution with subpolar species at locations and depths influenced by warm and saline Atlantic Water, and polar species in very cold and less saline Polar Water. The population of planktic foraminifera was represented by adults and juveniles of the polar species Neogloboquadrina pachyderma and the subpolar species Turborotalita quinqueloba. The dominating polar pteropod species Limacina helicina was represented by the juvenile and veliger stages. This winter study offers a unique contribution to our understanding of the inter-seasonal variability of planktic foraminfera and shelled pteropods abundance, distribution and population size structure in the Arctic Ocean. publishedVersion Article in Journal/Newspaper Arctic Arctic Ocean Barents Sea Foraminifera* Limacina helicina Nansen Basin Neogloboquadrina pachyderma Ocean acidification polar night Sea ice Zooplankton Institute for Marine Research: Brage IMR Arctic Arctic Ocean Barents Sea Frontiers in Marine Science 8 |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
description |
Planktic foraminfera and shelled pteropods are important calcifying groups of zooplankton in all oceans. Their calcium carbonate shells are sensitive to changes in ocean carbonate chemistry predisposing them as an important indicator of ocean acidification. Moreover, planktic foraminfera and shelled pteropods contribute significantly to food webs and vertical flux of calcium carbonate in polar pelagic ecosystems. Here we provide, for the first time, information on the under-ice planktic foraminifera and shelled pteropod abundance, species composition and vertical distribution along a transect (82°–76°N) covering the Nansen Basin and the northern Barents Sea during the polar night in December 2019. The two groups of calcifiers were examined in different environments in the context of water masses, sea ice cover, and ocean chemistry (nutrients and carbonate system). The average abundance of planktic foraminifera under the sea-ice was low with the highest average abundance (2 ind. m–3) close to the sea-ice margin. The maximum abundances of planktic foraminifera were concentrated at 20–50 m depth (4 and 7 ind. m–3) in the Nansen Basin and at 80–100 m depth (13 ind. m–3) close to the sea-ice margin. The highest average abundance (13 ind. m–3) and the maximum abundance of pteropods (40 ind. m–3) were found in the surface Polar Water at 0–20 m depth with very low temperatures (–1.9 to –1°C), low salinity (<34.4) and relatively low aragonite saturation of 1.43–1.68. The lowest aragonite saturation (<1.3) was observed in the bottom water in the northern Barents Sea. The species distribution of these calcifiers reflected the water mass distribution with subpolar species at locations and depths influenced by warm and saline Atlantic Water, and polar species in very cold and less saline Polar Water. The population of planktic foraminifera was represented by adults and juveniles of the polar species Neogloboquadrina pachyderma and the subpolar species Turborotalita quinqueloba. The dominating polar pteropod species Limacina helicina was represented by the juvenile and veliger stages. This winter study offers a unique contribution to our understanding of the inter-seasonal variability of planktic foraminfera and shelled pteropods abundance, distribution and population size structure in the Arctic Ocean. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Zamelczyk, Katarzyna Fransson, Agneta Chierici, Melissa Jones, Elizabeth Marie Meilland, Julie Anglada-Ortiz, Griselda Hodal Lødemel, Helene |
spellingShingle |
Zamelczyk, Katarzyna Fransson, Agneta Chierici, Melissa Jones, Elizabeth Marie Meilland, Julie Anglada-Ortiz, Griselda Hodal Lødemel, Helene Distribution and Abundances of Planktic Foraminifera and Shelled Pteropods During the Polar Night in the Sea-Ice Covered Northern Barents Sea |
author_facet |
Zamelczyk, Katarzyna Fransson, Agneta Chierici, Melissa Jones, Elizabeth Marie Meilland, Julie Anglada-Ortiz, Griselda Hodal Lødemel, Helene |
author_sort |
Zamelczyk, Katarzyna |
title |
Distribution and Abundances of Planktic Foraminifera and Shelled Pteropods During the Polar Night in the Sea-Ice Covered Northern Barents Sea |
title_short |
Distribution and Abundances of Planktic Foraminifera and Shelled Pteropods During the Polar Night in the Sea-Ice Covered Northern Barents Sea |
title_full |
Distribution and Abundances of Planktic Foraminifera and Shelled Pteropods During the Polar Night in the Sea-Ice Covered Northern Barents Sea |
title_fullStr |
Distribution and Abundances of Planktic Foraminifera and Shelled Pteropods During the Polar Night in the Sea-Ice Covered Northern Barents Sea |
title_full_unstemmed |
Distribution and Abundances of Planktic Foraminifera and Shelled Pteropods During the Polar Night in the Sea-Ice Covered Northern Barents Sea |
title_sort |
distribution and abundances of planktic foraminifera and shelled pteropods during the polar night in the sea-ice covered northern barents sea |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2828179 https://doi.org/10.3389/fmars.2021.644094 |
geographic |
Arctic Arctic Ocean Barents Sea |
geographic_facet |
Arctic Arctic Ocean Barents Sea |
genre |
Arctic Arctic Ocean Barents Sea Foraminifera* Limacina helicina Nansen Basin Neogloboquadrina pachyderma Ocean acidification polar night Sea ice Zooplankton |
genre_facet |
Arctic Arctic Ocean Barents Sea Foraminifera* Limacina helicina Nansen Basin Neogloboquadrina pachyderma Ocean acidification polar night Sea ice Zooplankton |
op_source |
1-19 8 Frontiers in Marine Science |
op_relation |
Norges forskningsråd: 276730 Frontiers in Marine Science. 2021, 8 1-19. urn:issn:2296-7745 https://hdl.handle.net/11250/2828179 https://doi.org/10.3389/fmars.2021.644094 cristin:1947774 |
op_doi |
https://doi.org/10.3389/fmars.2021.644094 |
container_title |
Frontiers in Marine Science |
container_volume |
8 |
_version_ |
1766349097566994432 |