Nutrient dynamics under different ocean acidification scenarios in a low nutrient low chlorophyll system: the Northwestern Mediterranean Sea
International audience Two pelagic mesocosm experiments were conducted to study the impact of ocean acidification on Mediterranean plankton communities. A first experiment took place in summer 2012 in the Bay of Calvi (France) followed by an experiment in winter 2013 in the Bay of Villefranche (Fran...
Published in: | Estuarine, Coastal and Shelf Science |
---|---|
Main Authors: | , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2017
|
Subjects: | |
Online Access: | https://hal.sorbonne-universite.fr/hal-01254357 https://hal.sorbonne-universite.fr/hal-01254357/document https://hal.sorbonne-universite.fr/hal-01254357/file/Louis_Nutrient_dynamics.pdf https://doi.org/10.1016/j.ecss.2016.01.015 |
id |
ftccsdartic:oai:HAL:hal-01254357v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
ocean acidification plankton community mesocosm experiments nutrient dynamics nitrogen phosphorus iron stoichiometry Oligotrophy Mediterranean Sea [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
ocean acidification plankton community mesocosm experiments nutrient dynamics nitrogen phosphorus iron stoichiometry Oligotrophy Mediterranean Sea [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Louis, Justine Guieu, Cecile Gazeau, Frédéric Nutrient dynamics under different ocean acidification scenarios in a low nutrient low chlorophyll system: the Northwestern Mediterranean Sea |
topic_facet |
ocean acidification plankton community mesocosm experiments nutrient dynamics nitrogen phosphorus iron stoichiometry Oligotrophy Mediterranean Sea [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Two pelagic mesocosm experiments were conducted to study the impact of ocean acidification on Mediterranean plankton communities. A first experiment took place in summer 2012 in the Bay of Calvi (France) followed by an experiment in winter 2013 in the Bay of Villefranche (France) under pre-bloom conditions. Nine mesocosms were deployed: three served as controls and six were acidified in a targeted partial pressure of CO2 (pCO2) gradient from 450 to 1250 μatm. The evolution of dissolved organic and inorganic nutrient concentrations was observed using nanomolar techniques. The experiments were characterized by a large contribution of organic nutrients to nutrient pools and contrasting in situ conditions with an inorganic N/P ratio of 1.7 in summer and of 117 in winter. In the Bay of Calvi, initial conditions were representative of the summer oligotrophic Mediterranean Sea. While inorganic phosphate concentrations were depleted during both experiments, in situ inorganic nitrogen concentrations were higher in winter. However, nitrate was rapidly consumed in winter in all mesocosms during the acidification phase, leading to a decrease in N/P ratio to 13. During these first mesocosm experiments conducted in a low nutrient low chlorophyll area, nutrient dynamics were insensitive to CO2 enrichment, indicating that nutrient speciation and related biological processes were likely not impacted. During both experiments, nitrate and phosphate dynamics were controlled by the activity of small species that are favored in low nutrient conditions. In contrast to the theoretical knowledge, no increase in iron solubility at high pCO2 was observed. |
author2 |
Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Louis, Justine Guieu, Cecile Gazeau, Frédéric |
author_facet |
Louis, Justine Guieu, Cecile Gazeau, Frédéric |
author_sort |
Louis, Justine |
title |
Nutrient dynamics under different ocean acidification scenarios in a low nutrient low chlorophyll system: the Northwestern Mediterranean Sea |
title_short |
Nutrient dynamics under different ocean acidification scenarios in a low nutrient low chlorophyll system: the Northwestern Mediterranean Sea |
title_full |
Nutrient dynamics under different ocean acidification scenarios in a low nutrient low chlorophyll system: the Northwestern Mediterranean Sea |
title_fullStr |
Nutrient dynamics under different ocean acidification scenarios in a low nutrient low chlorophyll system: the Northwestern Mediterranean Sea |
title_full_unstemmed |
Nutrient dynamics under different ocean acidification scenarios in a low nutrient low chlorophyll system: the Northwestern Mediterranean Sea |
title_sort |
nutrient dynamics under different ocean acidification scenarios in a low nutrient low chlorophyll system: the northwestern mediterranean sea |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.sorbonne-universite.fr/hal-01254357 https://hal.sorbonne-universite.fr/hal-01254357/document https://hal.sorbonne-universite.fr/hal-01254357/file/Louis_Nutrient_dynamics.pdf https://doi.org/10.1016/j.ecss.2016.01.015 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
ISSN: 0272-7714 EISSN: 1096-0015 Estuarine, Coastal and Shelf Science https://hal.sorbonne-universite.fr/hal-01254357 Estuarine, Coastal and Shelf Science, Elsevier, 2017, 186 (A), pp.30-44. ⟨10.1016/j.ecss.2016.01.015⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ecss.2016.01.015 hal-01254357 https://hal.sorbonne-universite.fr/hal-01254357 https://hal.sorbonne-universite.fr/hal-01254357/document https://hal.sorbonne-universite.fr/hal-01254357/file/Louis_Nutrient_dynamics.pdf doi:10.1016/j.ecss.2016.01.015 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.ecss.2016.01.015 |
container_title |
Estuarine, Coastal and Shelf Science |
container_volume |
186 |
container_start_page |
30 |
op_container_end_page |
44 |
_version_ |
1766156882698829824 |
spelling |
ftccsdartic:oai:HAL:hal-01254357v1 2023-05-15T17:50:13+02:00 Nutrient dynamics under different ocean acidification scenarios in a low nutrient low chlorophyll system: the Northwestern Mediterranean Sea Louis, Justine Guieu, Cecile Gazeau, Frédéric Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2017-01 https://hal.sorbonne-universite.fr/hal-01254357 https://hal.sorbonne-universite.fr/hal-01254357/document https://hal.sorbonne-universite.fr/hal-01254357/file/Louis_Nutrient_dynamics.pdf https://doi.org/10.1016/j.ecss.2016.01.015 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ecss.2016.01.015 hal-01254357 https://hal.sorbonne-universite.fr/hal-01254357 https://hal.sorbonne-universite.fr/hal-01254357/document https://hal.sorbonne-universite.fr/hal-01254357/file/Louis_Nutrient_dynamics.pdf doi:10.1016/j.ecss.2016.01.015 info:eu-repo/semantics/OpenAccess ISSN: 0272-7714 EISSN: 1096-0015 Estuarine, Coastal and Shelf Science https://hal.sorbonne-universite.fr/hal-01254357 Estuarine, Coastal and Shelf Science, Elsevier, 2017, 186 (A), pp.30-44. ⟨10.1016/j.ecss.2016.01.015⟩ ocean acidification plankton community mesocosm experiments nutrient dynamics nitrogen phosphorus iron stoichiometry Oligotrophy Mediterranean Sea [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2017 ftccsdartic https://doi.org/10.1016/j.ecss.2016.01.015 2021-12-26T00:11:57Z International audience Two pelagic mesocosm experiments were conducted to study the impact of ocean acidification on Mediterranean plankton communities. A first experiment took place in summer 2012 in the Bay of Calvi (France) followed by an experiment in winter 2013 in the Bay of Villefranche (France) under pre-bloom conditions. Nine mesocosms were deployed: three served as controls and six were acidified in a targeted partial pressure of CO2 (pCO2) gradient from 450 to 1250 μatm. The evolution of dissolved organic and inorganic nutrient concentrations was observed using nanomolar techniques. The experiments were characterized by a large contribution of organic nutrients to nutrient pools and contrasting in situ conditions with an inorganic N/P ratio of 1.7 in summer and of 117 in winter. In the Bay of Calvi, initial conditions were representative of the summer oligotrophic Mediterranean Sea. While inorganic phosphate concentrations were depleted during both experiments, in situ inorganic nitrogen concentrations were higher in winter. However, nitrate was rapidly consumed in winter in all mesocosms during the acidification phase, leading to a decrease in N/P ratio to 13. During these first mesocosm experiments conducted in a low nutrient low chlorophyll area, nutrient dynamics were insensitive to CO2 enrichment, indicating that nutrient speciation and related biological processes were likely not impacted. During both experiments, nitrate and phosphate dynamics were controlled by the activity of small species that are favored in low nutrient conditions. In contrast to the theoretical knowledge, no increase in iron solubility at high pCO2 was observed. Article in Journal/Newspaper Ocean acidification Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Estuarine, Coastal and Shelf Science 186 30 44 |