Population dynamics of modern planktonic foraminifera in the western Barents Sea
International audience This study reports on diversity and distribution of planktonic foraminifera (PF) in the Barents Sea Opening (BSO). Populations of PF living in late summer (collected by means of stratified plankton tows) and recently deposited individuals (sampled by interface corer) were comp...
Published in: | Biogeosciences |
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Format: | Article in Journal/Newspaper |
Language: | English |
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ftunivangershal:oai:HAL:insu-03663845v1 2024-06-23T07:51:37+00:00 Population dynamics of modern planktonic foraminifera in the western Barents Sea Meilland, Julie Howa, Hélène Hulot, Vivien Demangel, Isaline Salaün, Joëlle Garlan, Thierry Laboratoire de Planétologie et Géodynamique UMR 6112 (LPG) Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Service Hydrographique et Océanographique de la Marine (SHOM) Ministère de la défense (1936-.) 2020 https://insu.hal.science/insu-03663845 https://insu.hal.science/insu-03663845/document https://insu.hal.science/insu-03663845/file/bg-17-1437-2020.pdf https://doi.org/10.5194/bg-17-1437-2020 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-17-1437-2020 insu-03663845 https://insu.hal.science/insu-03663845 https://insu.hal.science/insu-03663845/document https://insu.hal.science/insu-03663845/file/bg-17-1437-2020.pdf BIBCODE: 2020BGeo.17.1437M doi:10.5194/bg-17-1437-2020 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://insu.hal.science/insu-03663845 Biogeosciences, 2020, 17, pp.1437-1450. ⟨10.5194/bg-17-1437-2020⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2020 ftunivangershal https://doi.org/10.5194/bg-17-1437-2020 2024-06-10T14:06:06Z International audience This study reports on diversity and distribution of planktonic foraminifera (PF) in the Barents Sea Opening (BSO). Populations of PF living in late summer (collected by means of stratified plankton tows) and recently deposited individuals (sampled by interface corer) were compared. High abundances reaching up to 400 unit ind. m-3 in tow samples and 8000 unit ind. m-3 in surface sediments were recorded in the centre of the studied area while low abundances were observed in coastal areas, likely due to continental influences. The living and core-top assemblages are mainly composed of the same four species Neogloboquadrina pachyderma, Neogloboquadrina incompta, Turborotalita quinqueloba and Globigerinita uvula. The two species G. uvula and T. quinqueloba dominate the upper water column, whereas surface sediment assemblages display particularly high concentrations of N. pachyderma. The unusual dominance of G. uvula in the water sample assemblages compared to its low proportion in surface sediments might be the signature of (1) a seasonal signal due to summer phytoplankton composition changes at the BSO, linked to the increase in summer temperature at the study site, and/or (2) a signal of a larger timescale and wider geographical reach phenomenon reflecting poleward temperate/subpolar species migration and consecutive foraminiferal assemblage diversification at high latitudes due to global change. Protein concentrations were measured on single specimens and used as a proxy of individual carbon biomass. Specimens of all species show the same trend, a northward decrease in their size-normalized-protein concentration. This suggests that foraminiferal biomass is potentially controlled by different constituents of their organelles (e.g. lipids). The coupling of data from plankton tows, protein measurements and surface sediments allows us to hypothesize that PF dynamics (seasonality and distribution) are decoupled from their metabolism. Article in Journal/Newspaper Barents Sea Neogloboquadrina pachyderma Planktonic foraminifera Portail des publications scientifiques de l’Université d’Angers (HAL) Barents Sea Biogeosciences 17 6 1437 1450 |
institution |
Open Polar |
collection |
Portail des publications scientifiques de l’Université d’Angers (HAL) |
op_collection_id |
ftunivangershal |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Meilland, Julie Howa, Hélène Hulot, Vivien Demangel, Isaline Salaün, Joëlle Garlan, Thierry Population dynamics of modern planktonic foraminifera in the western Barents Sea |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience This study reports on diversity and distribution of planktonic foraminifera (PF) in the Barents Sea Opening (BSO). Populations of PF living in late summer (collected by means of stratified plankton tows) and recently deposited individuals (sampled by interface corer) were compared. High abundances reaching up to 400 unit ind. m-3 in tow samples and 8000 unit ind. m-3 in surface sediments were recorded in the centre of the studied area while low abundances were observed in coastal areas, likely due to continental influences. The living and core-top assemblages are mainly composed of the same four species Neogloboquadrina pachyderma, Neogloboquadrina incompta, Turborotalita quinqueloba and Globigerinita uvula. The two species G. uvula and T. quinqueloba dominate the upper water column, whereas surface sediment assemblages display particularly high concentrations of N. pachyderma. The unusual dominance of G. uvula in the water sample assemblages compared to its low proportion in surface sediments might be the signature of (1) a seasonal signal due to summer phytoplankton composition changes at the BSO, linked to the increase in summer temperature at the study site, and/or (2) a signal of a larger timescale and wider geographical reach phenomenon reflecting poleward temperate/subpolar species migration and consecutive foraminiferal assemblage diversification at high latitudes due to global change. Protein concentrations were measured on single specimens and used as a proxy of individual carbon biomass. Specimens of all species show the same trend, a northward decrease in their size-normalized-protein concentration. This suggests that foraminiferal biomass is potentially controlled by different constituents of their organelles (e.g. lipids). The coupling of data from plankton tows, protein measurements and surface sediments allows us to hypothesize that PF dynamics (seasonality and distribution) are decoupled from their metabolism. |
author2 |
Laboratoire de Planétologie et Géodynamique UMR 6112 (LPG) Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Service Hydrographique et Océanographique de la Marine (SHOM) Ministère de la défense (1936-.) |
format |
Article in Journal/Newspaper |
author |
Meilland, Julie Howa, Hélène Hulot, Vivien Demangel, Isaline Salaün, Joëlle Garlan, Thierry |
author_facet |
Meilland, Julie Howa, Hélène Hulot, Vivien Demangel, Isaline Salaün, Joëlle Garlan, Thierry |
author_sort |
Meilland, Julie |
title |
Population dynamics of modern planktonic foraminifera in the western Barents Sea |
title_short |
Population dynamics of modern planktonic foraminifera in the western Barents Sea |
title_full |
Population dynamics of modern planktonic foraminifera in the western Barents Sea |
title_fullStr |
Population dynamics of modern planktonic foraminifera in the western Barents Sea |
title_full_unstemmed |
Population dynamics of modern planktonic foraminifera in the western Barents Sea |
title_sort |
population dynamics of modern planktonic foraminifera in the western barents sea |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://insu.hal.science/insu-03663845 https://insu.hal.science/insu-03663845/document https://insu.hal.science/insu-03663845/file/bg-17-1437-2020.pdf https://doi.org/10.5194/bg-17-1437-2020 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea Neogloboquadrina pachyderma Planktonic foraminifera |
genre_facet |
Barents Sea Neogloboquadrina pachyderma Planktonic foraminifera |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://insu.hal.science/insu-03663845 Biogeosciences, 2020, 17, pp.1437-1450. ⟨10.5194/bg-17-1437-2020⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-17-1437-2020 insu-03663845 https://insu.hal.science/insu-03663845 https://insu.hal.science/insu-03663845/document https://insu.hal.science/insu-03663845/file/bg-17-1437-2020.pdf BIBCODE: 2020BGeo.17.1437M doi:10.5194/bg-17-1437-2020 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-17-1437-2020 |
container_title |
Biogeosciences |
container_volume |
17 |
container_issue |
6 |
container_start_page |
1437 |
op_container_end_page |
1450 |
_version_ |
1802642747811692544 |