Impacts of Ocean Acidification on Sediment Processes in Shallow Waters of the Arctic Ocean
International audience Despite the important roles of shallow-water sediments in global biogeochemical cycling, the effects of ocean acidification on sedimentary processes have received relatively little attention. As high-latitude cold waters can absorb more CO 2 and usually have a lower buffering...
Published in: | PLoS ONE |
---|---|
Main Authors: | , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2014
|
Subjects: | |
Online Access: | https://hal.sorbonne-universite.fr/hal-01358325 https://hal.sorbonne-universite.fr/hal-01358325/document https://hal.sorbonne-universite.fr/hal-01358325/file/journal.pone.0094068.PDF https://doi.org/10.1371/journal.pone.0094068 |
id |
ftinsu:oai:HAL:hal-01358325v1 |
---|---|
record_format |
openpolar |
spelling |
ftinsu:oai:HAL:hal-01358325v1 2024-02-11T10:00:40+01:00 Impacts of Ocean Acidification on Sediment Processes in Shallow Waters of the Arctic Ocean Gazeau, Frédéric van Rijswijk, Pieter Pozzato, Lara Middelburg, Jack J. Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Royal Netherlands Institute for Sea Research (NIOZ) Universiteit Utrecht / Utrecht University Utrecht 2014 https://hal.sorbonne-universite.fr/hal-01358325 https://hal.sorbonne-universite.fr/hal-01358325/document https://hal.sorbonne-universite.fr/hal-01358325/file/journal.pone.0094068.PDF https://doi.org/10.1371/journal.pone.0094068 en eng HAL CCSD Public Library of Science info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0094068 hal-01358325 https://hal.sorbonne-universite.fr/hal-01358325 https://hal.sorbonne-universite.fr/hal-01358325/document https://hal.sorbonne-universite.fr/hal-01358325/file/journal.pone.0094068.PDF doi:10.1371/journal.pone.0094068 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1932-6203 EISSN: 1932-6203 PLoS ONE https://hal.sorbonne-universite.fr/hal-01358325 PLoS ONE, 2014, 9 (4), pp.e94068. ⟨10.1371/journal.pone.0094068⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2014 ftinsu https://doi.org/10.1371/journal.pone.0094068 2024-01-24T17:38:58Z International audience Despite the important roles of shallow-water sediments in global biogeochemical cycling, the effects of ocean acidification on sedimentary processes have received relatively little attention. As high-latitude cold waters can absorb more CO 2 and usually have a lower buffering capacity than warmer waters, acidification rates in these areas are faster than those in subtropical regions. The present study investigates the effects of ocean acidification on sediment composition, processes and sediment-water fluxes in an Arctic coastal system. Undisturbed sediment cores, exempt of large dwelling organisms, were collected, incubated for a period of 14 days, and subject to a gradient of pCO 2 covering the range of values projected for the end of the century. On five occasions during the experimental period, the sediment cores were isolated for flux measurements (oxygen, alkalinity, dissolved inorganic carbon, ammonium, nitrate, nitrite, phosphate and silicate). At the end of the experimental period, denitrification rates were measured and sediment samples were taken at several depth intervals for solid-phase analyses. Most of the parameters and processes (i.e. mineralization, denitrification) investigated showed no relationship with the overlying seawater pH, suggesting that ocean acidification will have limited impacts on the microbial activity and associated sediment-water fluxes on Arctic shelves, in the absence of active bio-irrigating organisms. Only following a pH decrease of 1 pH unit, not foreseen in the coming 300 years, significant enhancements of calcium carbonate dissolution and anammox rates were observed. Longer-term experiments on different sediment types are still required to confirm the limited impact of ocean acidification on shallow Arctic sediment processes as observed in this study. Article in Journal/Newspaper Arctic Arctic Ocean Ocean acidification Institut national des sciences de l'Univers: HAL-INSU Arctic Arctic Ocean PLoS ONE 9 4 e94068 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Gazeau, Frédéric van Rijswijk, Pieter Pozzato, Lara Middelburg, Jack J. Impacts of Ocean Acidification on Sediment Processes in Shallow Waters of the Arctic Ocean |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Despite the important roles of shallow-water sediments in global biogeochemical cycling, the effects of ocean acidification on sedimentary processes have received relatively little attention. As high-latitude cold waters can absorb more CO 2 and usually have a lower buffering capacity than warmer waters, acidification rates in these areas are faster than those in subtropical regions. The present study investigates the effects of ocean acidification on sediment composition, processes and sediment-water fluxes in an Arctic coastal system. Undisturbed sediment cores, exempt of large dwelling organisms, were collected, incubated for a period of 14 days, and subject to a gradient of pCO 2 covering the range of values projected for the end of the century. On five occasions during the experimental period, the sediment cores were isolated for flux measurements (oxygen, alkalinity, dissolved inorganic carbon, ammonium, nitrate, nitrite, phosphate and silicate). At the end of the experimental period, denitrification rates were measured and sediment samples were taken at several depth intervals for solid-phase analyses. Most of the parameters and processes (i.e. mineralization, denitrification) investigated showed no relationship with the overlying seawater pH, suggesting that ocean acidification will have limited impacts on the microbial activity and associated sediment-water fluxes on Arctic shelves, in the absence of active bio-irrigating organisms. Only following a pH decrease of 1 pH unit, not foreseen in the coming 300 years, significant enhancements of calcium carbonate dissolution and anammox rates were observed. Longer-term experiments on different sediment types are still required to confirm the limited impact of ocean acidification on shallow Arctic sediment processes as observed in this study. |
author2 |
Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Royal Netherlands Institute for Sea Research (NIOZ) Universiteit Utrecht / Utrecht University Utrecht |
format |
Article in Journal/Newspaper |
author |
Gazeau, Frédéric van Rijswijk, Pieter Pozzato, Lara Middelburg, Jack J. |
author_facet |
Gazeau, Frédéric van Rijswijk, Pieter Pozzato, Lara Middelburg, Jack J. |
author_sort |
Gazeau, Frédéric |
title |
Impacts of Ocean Acidification on Sediment Processes in Shallow Waters of the Arctic Ocean |
title_short |
Impacts of Ocean Acidification on Sediment Processes in Shallow Waters of the Arctic Ocean |
title_full |
Impacts of Ocean Acidification on Sediment Processes in Shallow Waters of the Arctic Ocean |
title_fullStr |
Impacts of Ocean Acidification on Sediment Processes in Shallow Waters of the Arctic Ocean |
title_full_unstemmed |
Impacts of Ocean Acidification on Sediment Processes in Shallow Waters of the Arctic Ocean |
title_sort |
impacts of ocean acidification on sediment processes in shallow waters of the arctic ocean |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.sorbonne-universite.fr/hal-01358325 https://hal.sorbonne-universite.fr/hal-01358325/document https://hal.sorbonne-universite.fr/hal-01358325/file/journal.pone.0094068.PDF https://doi.org/10.1371/journal.pone.0094068 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Ocean acidification |
genre_facet |
Arctic Arctic Ocean Ocean acidification |
op_source |
ISSN: 1932-6203 EISSN: 1932-6203 PLoS ONE https://hal.sorbonne-universite.fr/hal-01358325 PLoS ONE, 2014, 9 (4), pp.e94068. ⟨10.1371/journal.pone.0094068⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1371/journal.pone.0094068 hal-01358325 https://hal.sorbonne-universite.fr/hal-01358325 https://hal.sorbonne-universite.fr/hal-01358325/document https://hal.sorbonne-universite.fr/hal-01358325/file/journal.pone.0094068.PDF doi:10.1371/journal.pone.0094068 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1371/journal.pone.0094068 |
container_title |
PLoS ONE |
container_volume |
9 |
container_issue |
4 |
container_start_page |
e94068 |
_version_ |
1790596370852216832 |