Macro-nutrient concentrations in Antarctic pack ice : overall patterns and overlooked processes
Antarctic pack ice is inhabited by a diverse and active microbial community reliant on nutrients for growth. Seeking patterns and overlooked processes, we performed a large-scale compilation of macro-nutrient data (hereafter termed nutrients) in Antarctic pack ice (306 ice-cores collected from 19 re...
Published in: | Elementa: Science of the Anthropocene |
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Online Access: | http://hdl.handle.net/2115/70592 https://doi.org/10.1525/elementa.217 |
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/70592 2023-05-15T13:51:33+02:00 Macro-nutrient concentrations in Antarctic pack ice : overall patterns and overlooked processes Fripiat, François Meiners, Klaus M. Vancoppenolle, Martin Papadimitriou, Stathys Thomas, David N. Ackley, Stephen F. Arrigo, Kevin R. Carnat, Gauthier Cozzi, Stefano Delille, Bruno Dieckmann, Gerhard S. Dunbar, Robert B. Fransson, Agneta Kattner, Gerhard Kennedy, Hilary Lannuzel, Delphine Munro, David R. Nomura, Daiki Rintala, Janne-Markus Schoemann, Véronique Stefels, Jacqueline Steiner, Nadja Tison, Jean-Louis http://hdl.handle.net/2115/70592 https://doi.org/10.1525/elementa.217 eng eng University of California Press http://hdl.handle.net/2115/70592 Elementa : Science of the Anthropocene, 5: 13 http://dx.doi.org/10.1525/elementa.217 https://creativecommons.org/licenses/by/4.0/ CC-BY Nutrients sea ice Antarctica 660 article fthokunivhus https://doi.org/10.1525/elementa.217 2022-11-18T01:04:56Z Antarctic pack ice is inhabited by a diverse and active microbial community reliant on nutrients for growth. Seeking patterns and overlooked processes, we performed a large-scale compilation of macro-nutrient data (hereafter termed nutrients) in Antarctic pack ice (306 ice-cores collected from 19 research cruises). Dissolved inorganic nitrogen and silicic acid concentrations change with time, as expected from a seasonally productive ecosystem. In winter, salinity-normalized nitrate and silicic acid concentrations (C*) in sea ice are close to seawater concentrations (Cw), indicating little or no biological activity. In spring, nitrate and silicic acid concentrations become partially depleted with respect to seawater (C* < Cw), commensurate with the seasonal build-up of ice microalgae promoted by increased insolation. Stronger and earlier nitrate than silicic acid consumption suggests that a significant fraction of the primary productivity in sea ice is sustained by flagellates. By both consuming and producing ammonium and nitrite, the microbial community maintains these nutrients at relatively low concentrations in spring. With the decrease in insolation beginning in late summer, dissolved inorganic nitrogen and silicic acid concentrations increase, indicating imbalance between their production (increasing or unchanged) and consumption (decreasing) in sea ice. Unlike the depleted concentrations of both nitrate and silicic acid from spring to summer, phosphate accumulates in sea ice (C* > Cw). The phosphate excess could be explained by a greater allocation to phosphorus-rich biomolecules during ice algal blooms coupled with convective loss of excess dissolved nitrogen, preferential remineralization of phosphorus, and/or phosphate adsorption onto metal-organic complexes. Ammonium also appears to be efficiently adsorbed onto organic matter, with likely consequences to nitrogen mobility and availability. This dataset supports the view that the sea ice microbial community is highly efficient at processing ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Antarctic Elementa: Science of the Anthropocene 5 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
Nutrients sea ice Antarctica 660 |
spellingShingle |
Nutrients sea ice Antarctica 660 Fripiat, François Meiners, Klaus M. Vancoppenolle, Martin Papadimitriou, Stathys Thomas, David N. Ackley, Stephen F. Arrigo, Kevin R. Carnat, Gauthier Cozzi, Stefano Delille, Bruno Dieckmann, Gerhard S. Dunbar, Robert B. Fransson, Agneta Kattner, Gerhard Kennedy, Hilary Lannuzel, Delphine Munro, David R. Nomura, Daiki Rintala, Janne-Markus Schoemann, Véronique Stefels, Jacqueline Steiner, Nadja Tison, Jean-Louis Macro-nutrient concentrations in Antarctic pack ice : overall patterns and overlooked processes |
topic_facet |
Nutrients sea ice Antarctica 660 |
description |
Antarctic pack ice is inhabited by a diverse and active microbial community reliant on nutrients for growth. Seeking patterns and overlooked processes, we performed a large-scale compilation of macro-nutrient data (hereafter termed nutrients) in Antarctic pack ice (306 ice-cores collected from 19 research cruises). Dissolved inorganic nitrogen and silicic acid concentrations change with time, as expected from a seasonally productive ecosystem. In winter, salinity-normalized nitrate and silicic acid concentrations (C*) in sea ice are close to seawater concentrations (Cw), indicating little or no biological activity. In spring, nitrate and silicic acid concentrations become partially depleted with respect to seawater (C* < Cw), commensurate with the seasonal build-up of ice microalgae promoted by increased insolation. Stronger and earlier nitrate than silicic acid consumption suggests that a significant fraction of the primary productivity in sea ice is sustained by flagellates. By both consuming and producing ammonium and nitrite, the microbial community maintains these nutrients at relatively low concentrations in spring. With the decrease in insolation beginning in late summer, dissolved inorganic nitrogen and silicic acid concentrations increase, indicating imbalance between their production (increasing or unchanged) and consumption (decreasing) in sea ice. Unlike the depleted concentrations of both nitrate and silicic acid from spring to summer, phosphate accumulates in sea ice (C* > Cw). The phosphate excess could be explained by a greater allocation to phosphorus-rich biomolecules during ice algal blooms coupled with convective loss of excess dissolved nitrogen, preferential remineralization of phosphorus, and/or phosphate adsorption onto metal-organic complexes. Ammonium also appears to be efficiently adsorbed onto organic matter, with likely consequences to nitrogen mobility and availability. This dataset supports the view that the sea ice microbial community is highly efficient at processing ... |
format |
Article in Journal/Newspaper |
author |
Fripiat, François Meiners, Klaus M. Vancoppenolle, Martin Papadimitriou, Stathys Thomas, David N. Ackley, Stephen F. Arrigo, Kevin R. Carnat, Gauthier Cozzi, Stefano Delille, Bruno Dieckmann, Gerhard S. Dunbar, Robert B. Fransson, Agneta Kattner, Gerhard Kennedy, Hilary Lannuzel, Delphine Munro, David R. Nomura, Daiki Rintala, Janne-Markus Schoemann, Véronique Stefels, Jacqueline Steiner, Nadja Tison, Jean-Louis |
author_facet |
Fripiat, François Meiners, Klaus M. Vancoppenolle, Martin Papadimitriou, Stathys Thomas, David N. Ackley, Stephen F. Arrigo, Kevin R. Carnat, Gauthier Cozzi, Stefano Delille, Bruno Dieckmann, Gerhard S. Dunbar, Robert B. Fransson, Agneta Kattner, Gerhard Kennedy, Hilary Lannuzel, Delphine Munro, David R. Nomura, Daiki Rintala, Janne-Markus Schoemann, Véronique Stefels, Jacqueline Steiner, Nadja Tison, Jean-Louis |
author_sort |
Fripiat, François |
title |
Macro-nutrient concentrations in Antarctic pack ice : overall patterns and overlooked processes |
title_short |
Macro-nutrient concentrations in Antarctic pack ice : overall patterns and overlooked processes |
title_full |
Macro-nutrient concentrations in Antarctic pack ice : overall patterns and overlooked processes |
title_fullStr |
Macro-nutrient concentrations in Antarctic pack ice : overall patterns and overlooked processes |
title_full_unstemmed |
Macro-nutrient concentrations in Antarctic pack ice : overall patterns and overlooked processes |
title_sort |
macro-nutrient concentrations in antarctic pack ice : overall patterns and overlooked processes |
publisher |
University of California Press |
url |
http://hdl.handle.net/2115/70592 https://doi.org/10.1525/elementa.217 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Sea ice |
op_relation |
http://hdl.handle.net/2115/70592 Elementa : Science of the Anthropocene, 5: 13 http://dx.doi.org/10.1525/elementa.217 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1525/elementa.217 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
5 |
_version_ |
1766255452394356736 |