Role of small Rhizaria and diatoms in the pelagic silica production of the Sourther Ocean
We examined biogenic silica production and elementary composition (biogenic Si, particulate organic carbon and particulate organic nitrogen) of Rhizaria and diatoms in the upper 200 m along a transect in the Southwest Pacific sector of the Southern Ocean during austral summer (January–February 2019)...
Published in: | Limnology and Oceanography |
---|---|
Main Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2021
|
Subjects: | |
Online Access: | http://hdl.handle.net/10508/12112 http://hdl.handle.net/10261/319429 https://doi.org/10.1002/lno.11743 |
id |
ftcsic:oai:digital.csic.es:10261/319429 |
---|---|
record_format |
openpolar |
spelling |
ftcsic:oai:digital.csic.es:10261/319429 2024-02-11T09:56:16+01:00 Role of small Rhizaria and diatoms in the pelagic silica production of the Sourther Ocean Llopis Monferrer, Natalia Leynaert, Aude Tréguer, Paul Gutiérrez-Rodríguez, Andrés Moriceau, Brivaela Gallinari, Morgane Latasa, Mikel L'Helguen, Stéphane Maguer, Jean François Safi, Karl Pinkerton, M.H. Not, Fabrice 2021 http://hdl.handle.net/10508/12112 http://hdl.handle.net/10261/319429 https://doi.org/10.1002/lno.11743 en eng Centro Oceanográfico de Gijón VoR https://aslopubs.onlinelibrary.wiley.com/doi/10.1002/lno.11743 Limnology and Oceanography, 66. 2021: 2187-2202 0024-3590 http://hdl.handle.net/10508/12112 http://hdl.handle.net/10261/319429 doi:10.1002/lno.11743 23057 open Centro Oceanográfico de Gijón Rhizaria Medio Marino Diatoms Silica production Souther Ocean Silica paradox Silica export limnology silica plankton oceanography research article 2021 ftcsic https://doi.org/10.1002/lno.11743 2024-01-16T11:45:33Z We examined biogenic silica production and elementary composition (biogenic Si, particulate organic carbon and particulate organic nitrogen) of Rhizaria and diatoms in the upper 200 m along a transect in the Southwest Pacific sector of the Southern Ocean during austral summer (January–February 2019). From incubations using the 32Si radioisotope, silicic acid uptake rates were measured at 15 stations distributed in the Polar Front Zone, the Southern Antarctic Circumpolar Current and the Ross Sea Gyre. Rhizaria cells are heavily silicified (up to 7.6 nmol Si cell−1), displaying higher biogenic Si content than similar size specimens found in other areas of the global ocean, suggesting a higher degree of silicification of these organisms in the silicic acid rich Southern Ocean. Despite their high biogenic Si and carbon content, the Si/C molar ratio (average of 0.05 ± 0.03) is quite low compared to that of diatoms and relatively constant regardless of the environmental conditions. The direct measurements of Rhizaria's biogenic Si production (0.8–36.8 μmol Si m−2 d−1) are of the same order of magnitude than previous indirect estimations, confirming the importance of the Southern Ocean for the global Rhizaria silica production. However, diatoms largely dominated the biogenic Si standing stock and production of the euphotic layer, with low rhizarians' abundances and biogenic Si production (no more than 1%). In this manuscript, we discuss the Antarctic paradox of Rhizaria, that is, the potential high accumulation rates of biogenic Si due to Rhizaria in siliceous sediments despite their low production rates in surface waters. SI Article in Journal/Newspaper Antarc* Antarctic Ross Sea Southern Ocean Digital.CSIC (Spanish National Research Council) Antarctic Austral Pacific Ross Sea Southern Ocean The Antarctic Limnology and Oceanography 66 6 2187 2202 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Centro Oceanográfico de Gijón Rhizaria Medio Marino Diatoms Silica production Souther Ocean Silica paradox Silica export limnology silica plankton oceanography |
spellingShingle |
Centro Oceanográfico de Gijón Rhizaria Medio Marino Diatoms Silica production Souther Ocean Silica paradox Silica export limnology silica plankton oceanography Llopis Monferrer, Natalia Leynaert, Aude Tréguer, Paul Gutiérrez-Rodríguez, Andrés Moriceau, Brivaela Gallinari, Morgane Latasa, Mikel L'Helguen, Stéphane Maguer, Jean François Safi, Karl Pinkerton, M.H. Not, Fabrice Role of small Rhizaria and diatoms in the pelagic silica production of the Sourther Ocean |
topic_facet |
Centro Oceanográfico de Gijón Rhizaria Medio Marino Diatoms Silica production Souther Ocean Silica paradox Silica export limnology silica plankton oceanography |
description |
We examined biogenic silica production and elementary composition (biogenic Si, particulate organic carbon and particulate organic nitrogen) of Rhizaria and diatoms in the upper 200 m along a transect in the Southwest Pacific sector of the Southern Ocean during austral summer (January–February 2019). From incubations using the 32Si radioisotope, silicic acid uptake rates were measured at 15 stations distributed in the Polar Front Zone, the Southern Antarctic Circumpolar Current and the Ross Sea Gyre. Rhizaria cells are heavily silicified (up to 7.6 nmol Si cell−1), displaying higher biogenic Si content than similar size specimens found in other areas of the global ocean, suggesting a higher degree of silicification of these organisms in the silicic acid rich Southern Ocean. Despite their high biogenic Si and carbon content, the Si/C molar ratio (average of 0.05 ± 0.03) is quite low compared to that of diatoms and relatively constant regardless of the environmental conditions. The direct measurements of Rhizaria's biogenic Si production (0.8–36.8 μmol Si m−2 d−1) are of the same order of magnitude than previous indirect estimations, confirming the importance of the Southern Ocean for the global Rhizaria silica production. However, diatoms largely dominated the biogenic Si standing stock and production of the euphotic layer, with low rhizarians' abundances and biogenic Si production (no more than 1%). In this manuscript, we discuss the Antarctic paradox of Rhizaria, that is, the potential high accumulation rates of biogenic Si due to Rhizaria in siliceous sediments despite their low production rates in surface waters. SI |
format |
Article in Journal/Newspaper |
author |
Llopis Monferrer, Natalia Leynaert, Aude Tréguer, Paul Gutiérrez-Rodríguez, Andrés Moriceau, Brivaela Gallinari, Morgane Latasa, Mikel L'Helguen, Stéphane Maguer, Jean François Safi, Karl Pinkerton, M.H. Not, Fabrice |
author_facet |
Llopis Monferrer, Natalia Leynaert, Aude Tréguer, Paul Gutiérrez-Rodríguez, Andrés Moriceau, Brivaela Gallinari, Morgane Latasa, Mikel L'Helguen, Stéphane Maguer, Jean François Safi, Karl Pinkerton, M.H. Not, Fabrice |
author_sort |
Llopis Monferrer, Natalia |
title |
Role of small Rhizaria and diatoms in the pelagic silica production of the Sourther Ocean |
title_short |
Role of small Rhizaria and diatoms in the pelagic silica production of the Sourther Ocean |
title_full |
Role of small Rhizaria and diatoms in the pelagic silica production of the Sourther Ocean |
title_fullStr |
Role of small Rhizaria and diatoms in the pelagic silica production of the Sourther Ocean |
title_full_unstemmed |
Role of small Rhizaria and diatoms in the pelagic silica production of the Sourther Ocean |
title_sort |
role of small rhizaria and diatoms in the pelagic silica production of the sourther ocean |
publishDate |
2021 |
url |
http://hdl.handle.net/10508/12112 http://hdl.handle.net/10261/319429 https://doi.org/10.1002/lno.11743 |
geographic |
Antarctic Austral Pacific Ross Sea Southern Ocean The Antarctic |
geographic_facet |
Antarctic Austral Pacific Ross Sea Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Ross Sea Southern Ocean |
genre_facet |
Antarc* Antarctic Ross Sea Southern Ocean |
op_relation |
Centro Oceanográfico de Gijón VoR https://aslopubs.onlinelibrary.wiley.com/doi/10.1002/lno.11743 Limnology and Oceanography, 66. 2021: 2187-2202 0024-3590 http://hdl.handle.net/10508/12112 http://hdl.handle.net/10261/319429 doi:10.1002/lno.11743 23057 |
op_rights |
open |
op_doi |
https://doi.org/10.1002/lno.11743 |
container_title |
Limnology and Oceanography |
container_volume |
66 |
container_issue |
6 |
container_start_page |
2187 |
op_container_end_page |
2202 |
_version_ |
1790601892105027584 |