Foraminiferal Ecology and Role in Nitrogen Benthic Cycle in the Hypoxic Southeastern Bering Sea
International audience Southeastern Bering Sea is one of the highest surface productivity area in the open ocean due to strong upwelling along the Bering canyon. However, the benthic geochemistry and organisms living in the area have been largely overlooked. In August 2017, surface sediment was samp...
Published in: | Frontiers in Marine Science |
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Format: | Article in Journal/Newspaper |
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2020
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Online Access: | https://hal.science/hal-02987628 https://hal.science/hal-02987628/document https://hal.science/hal-02987628/file/Langlet%20et%20al.%20-%202020%20-%20Foraminiferal%20Ecology%20and%20Role%20in%20Nitrogen%20Benthic.pdf https://doi.org/10.3389/fmars.2020.582818 |
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ftunivlcoteopale:oai:HAL:hal-02987628v1 2023-05-15T15:43:21+02:00 Foraminiferal Ecology and Role in Nitrogen Benthic Cycle in the Hypoxic Southeastern Bering Sea Langlet, Dewi Bouchet, Vincent, Riso, Riccardo Matsui, Yohei Suga, Hisami Fujiwara, Yoshihiro Nomaki, Hidetaka Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) 2020-11-04 https://hal.science/hal-02987628 https://hal.science/hal-02987628/document https://hal.science/hal-02987628/file/Langlet%20et%20al.%20-%202020%20-%20Foraminiferal%20Ecology%20and%20Role%20in%20Nitrogen%20Benthic.pdf https://doi.org/10.3389/fmars.2020.582818 en eng HAL CCSD Frontiers Media info:eu-repo/semantics/altIdentifier/doi/10.3389/fmars.2020.582818 hal-02987628 https://hal.science/hal-02987628 https://hal.science/hal-02987628/document https://hal.science/hal-02987628/file/Langlet%20et%20al.%20-%202020%20-%20Foraminiferal%20Ecology%20and%20Role%20in%20Nitrogen%20Benthic.pdf doi:10.3389/fmars.2020.582818 info:eu-repo/semantics/OpenAccess ISSN: 2296-7745 Frontiers in Marine Science https://hal.science/hal-02987628 Frontiers in Marine Science, 2020, 7, ⟨10.3389/fmars.2020.582818⟩ Bering Sea Bering canyon ecology benthic foraminifera denitrification [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2020 ftunivlcoteopale https://doi.org/10.3389/fmars.2020.582818 2023-03-15T17:17:59Z International audience Southeastern Bering Sea is one of the highest surface productivity area in the open ocean due to strong upwelling along the Bering canyon. However, the benthic geochemistry and organisms living in the area have been largely overlooked. In August 2017, surface sediment was sampled from four stations along a transect at depths between 1536 and 103 meters in the Bering canyon with JAMSTEC R/V Mirai. Bottom-water hypoxia was recorded in the two deepest stations (1536 and 536 m). At these stations, the oxygen penetrated down to 5 mm in the sediment due to siltier and much organic-rich sediments in the deeper stations while oxygen penetration was about 20 mm at stations 103 and 197 m deep with coarse-grained sediment stations. Foraminiferal number of species and abundances were higher in the Unimak pass depression station E2 (197 m). Abundance did not change significantly between stations, suggesting that foraminiferal densities are not affected by the hypoxic conditions but are rather controlled by organic matter and nutrients availability. At the upper bathyal and middle bathyal stations, living foraminiferal communities were in general dominated by Uvigerina peregrina, Nonionella pulchella, Elphidium batialis, Globobulimina pacifica, Reophax spp., and Bolivina spathulata while the shallower stations exhibited large densities of Uvigerina peregrina, Cibicidoides wuellerstorfi, Recurvoidella bradyi, Globocassidulina subglobosa, and Portatrochammina pacifica. More than 50% of the individuals have a potential to accumulate nitrate in their cell (from 3 to 648 mmol/L; which is from 100 to 4000 times larger than the highest concentration measured in pore water). Onboard denitrification measurements confirmed that B. spathulata, N. pulchella and G. pacifica could reduce nitrate through denitrification and foraminiferal denitrification could contribute over 6% to benthic nitrate reduction at the southeast Bering Sea. Although the foraminiferal contributions were smaller than those measured at other ... Article in Journal/Newspaper Bering Sea Université du Littoral Côte d'Opale portail Bering Canyon ENVELOPE(-165.032,-165.032,54.894,54.894) Bering Sea Frontiers in Marine Science 7 |
institution |
Open Polar |
collection |
Université du Littoral Côte d'Opale portail |
op_collection_id |
ftunivlcoteopale |
language |
English |
topic |
Bering Sea Bering canyon ecology benthic foraminifera denitrification [SDE]Environmental Sciences |
spellingShingle |
Bering Sea Bering canyon ecology benthic foraminifera denitrification [SDE]Environmental Sciences Langlet, Dewi Bouchet, Vincent, Riso, Riccardo Matsui, Yohei Suga, Hisami Fujiwara, Yoshihiro Nomaki, Hidetaka Foraminiferal Ecology and Role in Nitrogen Benthic Cycle in the Hypoxic Southeastern Bering Sea |
topic_facet |
Bering Sea Bering canyon ecology benthic foraminifera denitrification [SDE]Environmental Sciences |
description |
International audience Southeastern Bering Sea is one of the highest surface productivity area in the open ocean due to strong upwelling along the Bering canyon. However, the benthic geochemistry and organisms living in the area have been largely overlooked. In August 2017, surface sediment was sampled from four stations along a transect at depths between 1536 and 103 meters in the Bering canyon with JAMSTEC R/V Mirai. Bottom-water hypoxia was recorded in the two deepest stations (1536 and 536 m). At these stations, the oxygen penetrated down to 5 mm in the sediment due to siltier and much organic-rich sediments in the deeper stations while oxygen penetration was about 20 mm at stations 103 and 197 m deep with coarse-grained sediment stations. Foraminiferal number of species and abundances were higher in the Unimak pass depression station E2 (197 m). Abundance did not change significantly between stations, suggesting that foraminiferal densities are not affected by the hypoxic conditions but are rather controlled by organic matter and nutrients availability. At the upper bathyal and middle bathyal stations, living foraminiferal communities were in general dominated by Uvigerina peregrina, Nonionella pulchella, Elphidium batialis, Globobulimina pacifica, Reophax spp., and Bolivina spathulata while the shallower stations exhibited large densities of Uvigerina peregrina, Cibicidoides wuellerstorfi, Recurvoidella bradyi, Globocassidulina subglobosa, and Portatrochammina pacifica. More than 50% of the individuals have a potential to accumulate nitrate in their cell (from 3 to 648 mmol/L; which is from 100 to 4000 times larger than the highest concentration measured in pore water). Onboard denitrification measurements confirmed that B. spathulata, N. pulchella and G. pacifica could reduce nitrate through denitrification and foraminiferal denitrification could contribute over 6% to benthic nitrate reduction at the southeast Bering Sea. Although the foraminiferal contributions were smaller than those measured at other ... |
author2 |
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) |
format |
Article in Journal/Newspaper |
author |
Langlet, Dewi Bouchet, Vincent, Riso, Riccardo Matsui, Yohei Suga, Hisami Fujiwara, Yoshihiro Nomaki, Hidetaka |
author_facet |
Langlet, Dewi Bouchet, Vincent, Riso, Riccardo Matsui, Yohei Suga, Hisami Fujiwara, Yoshihiro Nomaki, Hidetaka |
author_sort |
Langlet, Dewi |
title |
Foraminiferal Ecology and Role in Nitrogen Benthic Cycle in the Hypoxic Southeastern Bering Sea |
title_short |
Foraminiferal Ecology and Role in Nitrogen Benthic Cycle in the Hypoxic Southeastern Bering Sea |
title_full |
Foraminiferal Ecology and Role in Nitrogen Benthic Cycle in the Hypoxic Southeastern Bering Sea |
title_fullStr |
Foraminiferal Ecology and Role in Nitrogen Benthic Cycle in the Hypoxic Southeastern Bering Sea |
title_full_unstemmed |
Foraminiferal Ecology and Role in Nitrogen Benthic Cycle in the Hypoxic Southeastern Bering Sea |
title_sort |
foraminiferal ecology and role in nitrogen benthic cycle in the hypoxic southeastern bering sea |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-02987628 https://hal.science/hal-02987628/document https://hal.science/hal-02987628/file/Langlet%20et%20al.%20-%202020%20-%20Foraminiferal%20Ecology%20and%20Role%20in%20Nitrogen%20Benthic.pdf https://doi.org/10.3389/fmars.2020.582818 |
long_lat |
ENVELOPE(-165.032,-165.032,54.894,54.894) |
geographic |
Bering Canyon Bering Sea |
geographic_facet |
Bering Canyon Bering Sea |
genre |
Bering Sea |
genre_facet |
Bering Sea |
op_source |
ISSN: 2296-7745 Frontiers in Marine Science https://hal.science/hal-02987628 Frontiers in Marine Science, 2020, 7, ⟨10.3389/fmars.2020.582818⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3389/fmars.2020.582818 hal-02987628 https://hal.science/hal-02987628 https://hal.science/hal-02987628/document https://hal.science/hal-02987628/file/Langlet%20et%20al.%20-%202020%20-%20Foraminiferal%20Ecology%20and%20Role%20in%20Nitrogen%20Benthic.pdf doi:10.3389/fmars.2020.582818 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3389/fmars.2020.582818 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
_version_ |
1766377440685326336 |