Efficient silicon recycling in summer in both the Polar Frontal and Subantarctic Zones of the Southern Ocean
International audience We measured biogenic silica (bSiO(2)) dissolution and production rates at 3 Southern Ocean sites with contrasting biogeochemical regimes (SAZ-Sense cruise, January to February 2007). Two sites were located in the Subantarctic Zone (SAZ) southeast and southwest of Tasmania, and...
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Online Access: | https://hal.science/hal-00687945 https://hal.science/hal-00687945/document https://hal.science/hal-00687945/file/m435p047.pdf https://doi.org/10.3354/meps09237 |
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ftunivtoulon:oai:HAL:hal-00687945v1 2024-09-15T18:37:03+00:00 Efficient silicon recycling in summer in both the Polar Frontal and Subantarctic Zones of the Southern Ocean Fripiat, François Leblanc, Karine Elskens, Marc Cavagna, Anne-Julie Armand, Leanne André, Luc Dehairs, Frank Cardinal, Damien Royal Museum for Central Africa Tervuren (RMCA) Department of Earth and Environmental Sciences Brussels Université libre de Bruxelles (ULB) Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) Analytical and Environmental Chemistry and Earth System Sciences Vrije Universiteit Brussel Bruxelles (VUB) Macquarie University 2011 https://hal.science/hal-00687945 https://hal.science/hal-00687945/document https://hal.science/hal-00687945/file/m435p047.pdf https://doi.org/10.3354/meps09237 en eng HAL CCSD Inter Research info:eu-repo/semantics/altIdentifier/doi/10.3354/meps09237 hal-00687945 https://hal.science/hal-00687945 https://hal.science/hal-00687945/document https://hal.science/hal-00687945/file/m435p047.pdf doi:10.3354/meps09237 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-00687945 Marine Ecology Progress Series, 2011, 435, pp.47-61. ⟨10.3354/meps09237⟩ CHLOROPHYLL MAXIMUM SEASONAL PROGRESSION Diatoms Silicon cycle Dissolution Production Southern Ocean BIOGENIC SILICA DISSOLUTION RATES UPTAKE KINETICS ACID UPTAKE SARGASSO SEA MATTER DISTRIBUTION PHYTOPLANKTON GROWTH PACIFIC SECTOR [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2011 ftunivtoulon https://doi.org/10.3354/meps09237 2024-07-15T23:39:38Z International audience We measured biogenic silica (bSiO(2)) dissolution and production rates at 3 Southern Ocean sites with contrasting biogeochemical regimes (SAZ-Sense cruise, January to February 2007). Two sites were located in the Subantarctic Zone (SAZ) southeast and southwest of Tasmania, and 1 site was in the Polar Frontal Zone (PFZ). The measurements were repeated 3 times within a time frame of 4 to 7 d. In the PFZ and the western SAZ, the release of silicon from dissolving bSiO(2), following a productive period, appeared sufficient to entirely sustain Si demand in surface waters. Biogenic silica dissolution was more efficient in the SAZ, likely owing to stronger microzooplankton grazing and bacterial activity. The degree of iron co-limitation correlated to bSiO(2) growth rates (V-Si, d(-1)). Highest rates were observed in the SAZ, southeast of Tasmania, a region influenced by iron-enriched East Australian Current water advecting through the Subtropical Front. The diatom communities appeared differently adapted and conditioned, in terms of uptake ability, for growth under low Si(OH) 4 availability. Combining our results with existing bSiO(2) dissolution and production data, we estimate a spring to summer net bSiO(2) production for the circumpolar SAZ and PFZ regions of 7.4 and 3.6 Tmol yr(-1), respectively, representing 4.3 and 2.1% of the global net bSiO(2) production for each region. Furthermore, a clear seasonal pattern emerges with (1) higher bSiO(2) production in spring (0.9 to 12.7 and 6.8 to 60.7 mmol Si m(-2) d(-1) for the SAZ and PFZ, respectively) compared to summer (0.1 to 6.6 and 0.3 to 9.1 mmol Si m(-2) d(-1) for the SAZ and PFZ, respectively) and (2) a bSiO(2) dissolution to production ratio of <1 in spring (similar to 0.4) and generally >1 in summer (similar to 1.7). Article in Journal/Newspaper Southern Ocean Université de Toulon: HAL Marine Ecology Progress Series 435 47 61 |
institution |
Open Polar |
collection |
Université de Toulon: HAL |
op_collection_id |
ftunivtoulon |
language |
English |
topic |
CHLOROPHYLL MAXIMUM SEASONAL PROGRESSION Diatoms Silicon cycle Dissolution Production Southern Ocean BIOGENIC SILICA DISSOLUTION RATES UPTAKE KINETICS ACID UPTAKE SARGASSO SEA MATTER DISTRIBUTION PHYTOPLANKTON GROWTH PACIFIC SECTOR [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
CHLOROPHYLL MAXIMUM SEASONAL PROGRESSION Diatoms Silicon cycle Dissolution Production Southern Ocean BIOGENIC SILICA DISSOLUTION RATES UPTAKE KINETICS ACID UPTAKE SARGASSO SEA MATTER DISTRIBUTION PHYTOPLANKTON GROWTH PACIFIC SECTOR [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Fripiat, François Leblanc, Karine Elskens, Marc Cavagna, Anne-Julie Armand, Leanne André, Luc Dehairs, Frank Cardinal, Damien Efficient silicon recycling in summer in both the Polar Frontal and Subantarctic Zones of the Southern Ocean |
topic_facet |
CHLOROPHYLL MAXIMUM SEASONAL PROGRESSION Diatoms Silicon cycle Dissolution Production Southern Ocean BIOGENIC SILICA DISSOLUTION RATES UPTAKE KINETICS ACID UPTAKE SARGASSO SEA MATTER DISTRIBUTION PHYTOPLANKTON GROWTH PACIFIC SECTOR [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience We measured biogenic silica (bSiO(2)) dissolution and production rates at 3 Southern Ocean sites with contrasting biogeochemical regimes (SAZ-Sense cruise, January to February 2007). Two sites were located in the Subantarctic Zone (SAZ) southeast and southwest of Tasmania, and 1 site was in the Polar Frontal Zone (PFZ). The measurements were repeated 3 times within a time frame of 4 to 7 d. In the PFZ and the western SAZ, the release of silicon from dissolving bSiO(2), following a productive period, appeared sufficient to entirely sustain Si demand in surface waters. Biogenic silica dissolution was more efficient in the SAZ, likely owing to stronger microzooplankton grazing and bacterial activity. The degree of iron co-limitation correlated to bSiO(2) growth rates (V-Si, d(-1)). Highest rates were observed in the SAZ, southeast of Tasmania, a region influenced by iron-enriched East Australian Current water advecting through the Subtropical Front. The diatom communities appeared differently adapted and conditioned, in terms of uptake ability, for growth under low Si(OH) 4 availability. Combining our results with existing bSiO(2) dissolution and production data, we estimate a spring to summer net bSiO(2) production for the circumpolar SAZ and PFZ regions of 7.4 and 3.6 Tmol yr(-1), respectively, representing 4.3 and 2.1% of the global net bSiO(2) production for each region. Furthermore, a clear seasonal pattern emerges with (1) higher bSiO(2) production in spring (0.9 to 12.7 and 6.8 to 60.7 mmol Si m(-2) d(-1) for the SAZ and PFZ, respectively) compared to summer (0.1 to 6.6 and 0.3 to 9.1 mmol Si m(-2) d(-1) for the SAZ and PFZ, respectively) and (2) a bSiO(2) dissolution to production ratio of <1 in spring (similar to 0.4) and generally >1 in summer (similar to 1.7). |
author2 |
Royal Museum for Central Africa Tervuren (RMCA) Department of Earth and Environmental Sciences Brussels Université libre de Bruxelles (ULB) Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) Analytical and Environmental Chemistry and Earth System Sciences Vrije Universiteit Brussel Bruxelles (VUB) Macquarie University |
format |
Article in Journal/Newspaper |
author |
Fripiat, François Leblanc, Karine Elskens, Marc Cavagna, Anne-Julie Armand, Leanne André, Luc Dehairs, Frank Cardinal, Damien |
author_facet |
Fripiat, François Leblanc, Karine Elskens, Marc Cavagna, Anne-Julie Armand, Leanne André, Luc Dehairs, Frank Cardinal, Damien |
author_sort |
Fripiat, François |
title |
Efficient silicon recycling in summer in both the Polar Frontal and Subantarctic Zones of the Southern Ocean |
title_short |
Efficient silicon recycling in summer in both the Polar Frontal and Subantarctic Zones of the Southern Ocean |
title_full |
Efficient silicon recycling in summer in both the Polar Frontal and Subantarctic Zones of the Southern Ocean |
title_fullStr |
Efficient silicon recycling in summer in both the Polar Frontal and Subantarctic Zones of the Southern Ocean |
title_full_unstemmed |
Efficient silicon recycling in summer in both the Polar Frontal and Subantarctic Zones of the Southern Ocean |
title_sort |
efficient silicon recycling in summer in both the polar frontal and subantarctic zones of the southern ocean |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://hal.science/hal-00687945 https://hal.science/hal-00687945/document https://hal.science/hal-00687945/file/m435p047.pdf https://doi.org/10.3354/meps09237 |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-00687945 Marine Ecology Progress Series, 2011, 435, pp.47-61. ⟨10.3354/meps09237⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3354/meps09237 hal-00687945 https://hal.science/hal-00687945 https://hal.science/hal-00687945/document https://hal.science/hal-00687945/file/m435p047.pdf doi:10.3354/meps09237 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3354/meps09237 |
container_title |
Marine Ecology Progress Series |
container_volume |
435 |
container_start_page |
47 |
op_container_end_page |
61 |
_version_ |
1810481372753559552 |