Contrasting effects of acidification and warming on dimethylsulfide 2 concentrations during a temperate estuarine fall bloom mesocosm 3 experiment
The effects of ocean acidification and warming on the concentrations of dimethylsulfoniopropionate (DMSP) and dimethylsulfide (DMS) were investigated during a mesocosm experiment in the Lower St. Lawrence Estuary (LSLE) in the fall of 2014. Twelve mesocosms covering a range of pHT (pH on the total h...
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ftconicet:oai:ri.conicet.gov.ar:11336/127394 2023-10-09T21:54:58+02:00 Contrasting effects of acidification and warming on dimethylsulfide 2 concentrations during a temperate estuarine fall bloom mesocosm 3 experiment Benard, Robin Ferreyra, Gustavo Adolfo Michael, Scarratt Sonia, Michaud Michel, Starr Alfonso, Mucci Gosselin, Michel Tremblay, Jean-Éric Lizotte, Martine Yang, Gui Peng application/pdf http://hdl.handle.net/11336/127394 eng eng Copernicus Publications info:eu-repo/semantics/altIdentifier/url/https://bg.copernicus.org/articles/16/1167/2019/ info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-16-1167-2019 http://hdl.handle.net/11336/127394 Benard, Robin; Ferreyra, Gustavo Adolfo; Michael, Scarratt; Sonia, Michaud; Michel, Starr; et al.; Contrasting effects of acidification and warming on dimethylsulfide 2 concentrations during a temperate estuarine fall bloom mesocosm 3 experiment; Copernicus Publications; Biogeosciences; 16; 6; 8-2018; 1167-1185 1726-4170 1726-4189 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ acidification warming https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.5194/bg-16-1167-2019 2023-09-24T19:04:38Z The effects of ocean acidification and warming on the concentrations of dimethylsulfoniopropionate (DMSP) and dimethylsulfide (DMS) were investigated during a mesocosm experiment in the Lower St. Lawrence Estuary (LSLE) in the fall of 2014. Twelve mesocosms covering a range of pHT (pH on the total hydrogen ion concentration scale) from 8.0 to 7.2, corresponding to a range of CO2 partial pressures (pCO2) from 440 to 2900 μatm, at two temperatures (in situ and C5 °C; 10 and 15 °C) were monitored during 13 days. All mesocosms were characterized by the rapid development of a diatom bloom dominated by Skeletonema costatum, followed by its decline upon the exhaustion of nitrate and silicic acid. Neither the acidification nor the warming resulted in a significant impact on the abundance of bacteria over the experiment. However, warming the water by 5 °C resulted in a significant increase in the average bacterial production (BP) in all 15 °C mesocosms as compared to 10 °C, with no detectable effect of pCO2 on BP. Variations in total DMSP (DMSPt DparticulateCdissolved DMSP) concentrations tracked the development of the bloom, although the rise in DMSPt persisted for a few days after the peaks in chlorophyll a. Average concentrations of DMSPt were not affected by acidification or warming. Initially low concentrations of DMS (< 1 nmol L-1) increased to reach peak values ranging from 30 to 130 nmol L-1 towards the end of the experiment. Increasing the pCO2 reduced the averaged DMS concentrations by 66%and 69%at 10 and 15 °C, respectively, over the duration of the experiment. On the other hand, a 5 °C warming increased DMS concentrations by an average of 240% as compared to in situ temperature, resulting in a positive offset of the adverse pCO2 impact. Significant positive correlations found between bacterial production and concentrations of DMS throughout our experiment point towards temperatureassociated enhancement of bacterial DMSP metabolism as a likely driver of the mitigating effect of warming on the negative ... Article in Journal/Newspaper Ocean acidification CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Biogeosciences 16 6 1167 1185 |
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Open Polar |
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CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
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ftconicet |
language |
English |
topic |
acidification warming https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
acidification warming https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Benard, Robin Ferreyra, Gustavo Adolfo Michael, Scarratt Sonia, Michaud Michel, Starr Alfonso, Mucci Gosselin, Michel Tremblay, Jean-Éric Lizotte, Martine Yang, Gui Peng Contrasting effects of acidification and warming on dimethylsulfide 2 concentrations during a temperate estuarine fall bloom mesocosm 3 experiment |
topic_facet |
acidification warming https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
The effects of ocean acidification and warming on the concentrations of dimethylsulfoniopropionate (DMSP) and dimethylsulfide (DMS) were investigated during a mesocosm experiment in the Lower St. Lawrence Estuary (LSLE) in the fall of 2014. Twelve mesocosms covering a range of pHT (pH on the total hydrogen ion concentration scale) from 8.0 to 7.2, corresponding to a range of CO2 partial pressures (pCO2) from 440 to 2900 μatm, at two temperatures (in situ and C5 °C; 10 and 15 °C) were monitored during 13 days. All mesocosms were characterized by the rapid development of a diatom bloom dominated by Skeletonema costatum, followed by its decline upon the exhaustion of nitrate and silicic acid. Neither the acidification nor the warming resulted in a significant impact on the abundance of bacteria over the experiment. However, warming the water by 5 °C resulted in a significant increase in the average bacterial production (BP) in all 15 °C mesocosms as compared to 10 °C, with no detectable effect of pCO2 on BP. Variations in total DMSP (DMSPt DparticulateCdissolved DMSP) concentrations tracked the development of the bloom, although the rise in DMSPt persisted for a few days after the peaks in chlorophyll a. Average concentrations of DMSPt were not affected by acidification or warming. Initially low concentrations of DMS (< 1 nmol L-1) increased to reach peak values ranging from 30 to 130 nmol L-1 towards the end of the experiment. Increasing the pCO2 reduced the averaged DMS concentrations by 66%and 69%at 10 and 15 °C, respectively, over the duration of the experiment. On the other hand, a 5 °C warming increased DMS concentrations by an average of 240% as compared to in situ temperature, resulting in a positive offset of the adverse pCO2 impact. Significant positive correlations found between bacterial production and concentrations of DMS throughout our experiment point towards temperatureassociated enhancement of bacterial DMSP metabolism as a likely driver of the mitigating effect of warming on the negative ... |
format |
Article in Journal/Newspaper |
author |
Benard, Robin Ferreyra, Gustavo Adolfo Michael, Scarratt Sonia, Michaud Michel, Starr Alfonso, Mucci Gosselin, Michel Tremblay, Jean-Éric Lizotte, Martine Yang, Gui Peng |
author_facet |
Benard, Robin Ferreyra, Gustavo Adolfo Michael, Scarratt Sonia, Michaud Michel, Starr Alfonso, Mucci Gosselin, Michel Tremblay, Jean-Éric Lizotte, Martine Yang, Gui Peng |
author_sort |
Benard, Robin |
title |
Contrasting effects of acidification and warming on dimethylsulfide 2 concentrations during a temperate estuarine fall bloom mesocosm 3 experiment |
title_short |
Contrasting effects of acidification and warming on dimethylsulfide 2 concentrations during a temperate estuarine fall bloom mesocosm 3 experiment |
title_full |
Contrasting effects of acidification and warming on dimethylsulfide 2 concentrations during a temperate estuarine fall bloom mesocosm 3 experiment |
title_fullStr |
Contrasting effects of acidification and warming on dimethylsulfide 2 concentrations during a temperate estuarine fall bloom mesocosm 3 experiment |
title_full_unstemmed |
Contrasting effects of acidification and warming on dimethylsulfide 2 concentrations during a temperate estuarine fall bloom mesocosm 3 experiment |
title_sort |
contrasting effects of acidification and warming on dimethylsulfide 2 concentrations during a temperate estuarine fall bloom mesocosm 3 experiment |
publisher |
Copernicus Publications |
url |
http://hdl.handle.net/11336/127394 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://bg.copernicus.org/articles/16/1167/2019/ info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-16-1167-2019 http://hdl.handle.net/11336/127394 Benard, Robin; Ferreyra, Gustavo Adolfo; Michael, Scarratt; Sonia, Michaud; Michel, Starr; et al.; Contrasting effects of acidification and warming on dimethylsulfide 2 concentrations during a temperate estuarine fall bloom mesocosm 3 experiment; Copernicus Publications; Biogeosciences; 16; 6; 8-2018; 1167-1185 1726-4170 1726-4189 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ |
op_doi |
https://doi.org/10.5194/bg-16-1167-2019 |
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Biogeosciences |
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16 |
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6 |
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1167 |
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1185 |
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1779318735803252736 |