Planktic Foraminiferal Assemblages in Surface Sediments From the Subpolar North Atlantic Ocean
The subpolar North Atlantic (SPNA) Ocean has complex hydrography, and moderates the global climate through the Atlantic Meridional Overturning Circulation (AMOC). The surface water mass dynamics in SPNA and the upper limb of AMOC, govern the plankton distribution. Specifically, the habitat of modern...
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Online Access: | http://dx.doi.org/10.3389/fmars.2021.781675 https://www.frontiersin.org/articles/10.3389/fmars.2021.781675/full |
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crfrontiers:10.3389/fmars.2021.781675 2024-05-19T07:36:32+00:00 Planktic Foraminiferal Assemblages in Surface Sediments From the Subpolar North Atlantic Ocean Sahoo, Nibedita Saalim, Syed Mohammad Matul, Alexander Mohan, Rahul Tikhonova, Anna Kozina, Nina 2022 http://dx.doi.org/10.3389/fmars.2021.781675 https://www.frontiersin.org/articles/10.3389/fmars.2021.781675/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Marine Science volume 8 ISSN 2296-7745 journal-article 2022 crfrontiers https://doi.org/10.3389/fmars.2021.781675 2024-04-24T07:11:14Z The subpolar North Atlantic (SPNA) Ocean has complex hydrography, and moderates the global climate through the Atlantic Meridional Overturning Circulation (AMOC). The surface water mass dynamics in SPNA and the upper limb of AMOC, govern the plankton distribution. Specifically, the habitat of modern planktic foraminifera is strongly affected by the SPNA hydrography. In the present study, 25 surface sediment samples from the Labrador Sea to the Iceland-Faroe-Shetland Channel (IFSC) were examined for planktic foraminifera distribution along a latitudinal transect at 59.50°N. The planktic foraminifera distribution followed the transition in water mass structure in the study area from the Sub-Arctic water in the west to the warm North Atlantic water in the east. Temperature and salinity are two dominant ecological factors controlling planktic foraminifera assemblages in the region. This hydrographic contrast was also reflected in the ratio of Neogloboquadrina pachyderma / Neogloboquadrina incompta along the transect. Based on the cluster analysis, the planktic foraminifera assemblages could be assigned to three groups. A cold/polar group in the Labrador Sea, a mixed (both cold and warm) group in the Irminger Sea and IFSC, and a warmer temperate group in the eastern part of the transect were represented by different planktic foraminifera assemblages. Additionally, a decrease in Globorotalia inflata in the eastern transect and an increase in Turborotalita quinqueloba in the Iceland basin and Irminger Sea was observed in our study when compared with the published dataset. From this, we suggest a shift in planktic assemblages in the SPNA. The present study on the distribution of modern planktic foraminifera can help paleoceanographic reconstructions in the SPNA ocean. Article in Journal/Newspaper Arctic Foraminifera* Iceland Labrador Sea Neogloboquadrina pachyderma North Atlantic Frontiers (Publisher) Frontiers in Marine Science 8 |
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Frontiers (Publisher) |
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description |
The subpolar North Atlantic (SPNA) Ocean has complex hydrography, and moderates the global climate through the Atlantic Meridional Overturning Circulation (AMOC). The surface water mass dynamics in SPNA and the upper limb of AMOC, govern the plankton distribution. Specifically, the habitat of modern planktic foraminifera is strongly affected by the SPNA hydrography. In the present study, 25 surface sediment samples from the Labrador Sea to the Iceland-Faroe-Shetland Channel (IFSC) were examined for planktic foraminifera distribution along a latitudinal transect at 59.50°N. The planktic foraminifera distribution followed the transition in water mass structure in the study area from the Sub-Arctic water in the west to the warm North Atlantic water in the east. Temperature and salinity are two dominant ecological factors controlling planktic foraminifera assemblages in the region. This hydrographic contrast was also reflected in the ratio of Neogloboquadrina pachyderma / Neogloboquadrina incompta along the transect. Based on the cluster analysis, the planktic foraminifera assemblages could be assigned to three groups. A cold/polar group in the Labrador Sea, a mixed (both cold and warm) group in the Irminger Sea and IFSC, and a warmer temperate group in the eastern part of the transect were represented by different planktic foraminifera assemblages. Additionally, a decrease in Globorotalia inflata in the eastern transect and an increase in Turborotalita quinqueloba in the Iceland basin and Irminger Sea was observed in our study when compared with the published dataset. From this, we suggest a shift in planktic assemblages in the SPNA. The present study on the distribution of modern planktic foraminifera can help paleoceanographic reconstructions in the SPNA ocean. |
format |
Article in Journal/Newspaper |
author |
Sahoo, Nibedita Saalim, Syed Mohammad Matul, Alexander Mohan, Rahul Tikhonova, Anna Kozina, Nina |
spellingShingle |
Sahoo, Nibedita Saalim, Syed Mohammad Matul, Alexander Mohan, Rahul Tikhonova, Anna Kozina, Nina Planktic Foraminiferal Assemblages in Surface Sediments From the Subpolar North Atlantic Ocean |
author_facet |
Sahoo, Nibedita Saalim, Syed Mohammad Matul, Alexander Mohan, Rahul Tikhonova, Anna Kozina, Nina |
author_sort |
Sahoo, Nibedita |
title |
Planktic Foraminiferal Assemblages in Surface Sediments From the Subpolar North Atlantic Ocean |
title_short |
Planktic Foraminiferal Assemblages in Surface Sediments From the Subpolar North Atlantic Ocean |
title_full |
Planktic Foraminiferal Assemblages in Surface Sediments From the Subpolar North Atlantic Ocean |
title_fullStr |
Planktic Foraminiferal Assemblages in Surface Sediments From the Subpolar North Atlantic Ocean |
title_full_unstemmed |
Planktic Foraminiferal Assemblages in Surface Sediments From the Subpolar North Atlantic Ocean |
title_sort |
planktic foraminiferal assemblages in surface sediments from the subpolar north atlantic ocean |
publisher |
Frontiers Media SA |
publishDate |
2022 |
url |
http://dx.doi.org/10.3389/fmars.2021.781675 https://www.frontiersin.org/articles/10.3389/fmars.2021.781675/full |
genre |
Arctic Foraminifera* Iceland Labrador Sea Neogloboquadrina pachyderma North Atlantic |
genre_facet |
Arctic Foraminifera* Iceland Labrador Sea Neogloboquadrina pachyderma North Atlantic |
op_source |
Frontiers in Marine Science volume 8 ISSN 2296-7745 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fmars.2021.781675 |
container_title |
Frontiers in Marine Science |
container_volume |
8 |
_version_ |
1799475662596079616 |