Contrasting responses of DMS and DMSP to ocean acidification in Arctic waters
Increasing atmospheric CO2 is decreasing ocean pH most rapidly in colder regions such as the Arctic. As a component of the EPOCA (European Project on Ocean Acidification) pelagic mesocosm experiment off Spitzbergen in 2010, we examined the consequences of decreased pH and increased pCO2 on the conce...
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ftnorskinstvf:oai:niva.brage.unit.no:11250/194288 2023-05-15T14:26:31+02:00 Contrasting responses of DMS and DMSP to ocean acidification in Arctic waters Archer, S.D. Kimmance, S.A. Stephens, J.A. Hopkins, F.E. Bellerby, Richard Schulz, K.G. Piontek, J. Engel, A. 2014-02-27T09:35:21Z application/pdf http://hdl.handle.net/11250/194288 https://doi.org/10.5194/bg-10-1893-2013 eng eng European Geosciences Union http://www.biogeosciences.net/10/1893/2013/bg-10-1893-2013.html Archer, S.D., Kimmance, S.A., Stephens et al. 2013. Contrasting responses of DMS and DMSP to ocean acidification in Arctic waters. Biogeosciences 10(3) 1893-1908. doi:10.5194/bg-10-1893-2013 urn:issn:1726-4170 http://hdl.handle.net/11250/194288 https://doi.org/10.5194/bg-10-1893-2013 cristin:1035020 https://creativecommons.org/licenses/by/3.0/ © Author(s) 2013. This work is distributed under the Creative Commons Attribution 3.0 License. CC-BY 1893-1908 10 Biogeosciences 3 Journal article Peer reviewed 2014 ftnorskinstvf https://doi.org/10.5194/bg-10-1893-2013 2023-03-01T23:44:15Z Increasing atmospheric CO2 is decreasing ocean pH most rapidly in colder regions such as the Arctic. As a component of the EPOCA (European Project on Ocean Acidification) pelagic mesocosm experiment off Spitzbergen in 2010, we examined the consequences of decreased pH and increased pCO2 on the concentrations of dimethylsulphide (DMS). DMS is an important reactant and contributor to aerosol formation and growth in the Arctic troposphere. In the nine mesocosms with initial pHT 8.3 to 7.5, equivalent to pCO2 of 180 to 1420 μatm, highly significant but inverse responses to acidity (hydrogen ion concentration [H+]) occurred following nutrient addition. Compared to ambient [H+], average concentrations of DMS during the mid-phase of the 30 d experiment, when the influence of altered acidity was unambiguous, were reduced by approximately 60% at the highest [H+] and by 35% at [H+] equivalent to 750 μatm pCO2, as projected for 2100. In contrast, concentrations of dimethylsulphoniopropionate (DMSP), the precursor of DMS, were elevated by approximately 50% at the highest [H+] and by 30% at [H+] corresponding to 750 μatm pCO2. Measurements of the specific rate of synthesis of DMSP by phytoplankton indicate increased production at high [H+], in parallel to rates of inorganic carbon fixation. The elevated DMSP production at high [H+] was largely a consequence of increased dinoflagellate biomass and in particular, the increased abundance of the species Heterocapsa rotundata. We discuss both phytoplankton and bacterial processes that may explain the reduced ratios of DMS:DMSPt (total dimethylsulphoniopropionate) at higher [H+]. The experimental design of eight treatment levels provides comparatively robust empirical relationships of DMS and DMSP concentration, DMSP production and dinoflagellate biomass versus [H+] in Arctic waters Article in Journal/Newspaper Arctic Arctic Ocean acidification Phytoplankton Spitzbergen Norwegian Institute for Water research: NIVA Open Access Archive (Brage) Arctic Biogeosciences 10 3 1893 1908 |
institution |
Open Polar |
collection |
Norwegian Institute for Water research: NIVA Open Access Archive (Brage) |
op_collection_id |
ftnorskinstvf |
language |
English |
description |
Increasing atmospheric CO2 is decreasing ocean pH most rapidly in colder regions such as the Arctic. As a component of the EPOCA (European Project on Ocean Acidification) pelagic mesocosm experiment off Spitzbergen in 2010, we examined the consequences of decreased pH and increased pCO2 on the concentrations of dimethylsulphide (DMS). DMS is an important reactant and contributor to aerosol formation and growth in the Arctic troposphere. In the nine mesocosms with initial pHT 8.3 to 7.5, equivalent to pCO2 of 180 to 1420 μatm, highly significant but inverse responses to acidity (hydrogen ion concentration [H+]) occurred following nutrient addition. Compared to ambient [H+], average concentrations of DMS during the mid-phase of the 30 d experiment, when the influence of altered acidity was unambiguous, were reduced by approximately 60% at the highest [H+] and by 35% at [H+] equivalent to 750 μatm pCO2, as projected for 2100. In contrast, concentrations of dimethylsulphoniopropionate (DMSP), the precursor of DMS, were elevated by approximately 50% at the highest [H+] and by 30% at [H+] corresponding to 750 μatm pCO2. Measurements of the specific rate of synthesis of DMSP by phytoplankton indicate increased production at high [H+], in parallel to rates of inorganic carbon fixation. The elevated DMSP production at high [H+] was largely a consequence of increased dinoflagellate biomass and in particular, the increased abundance of the species Heterocapsa rotundata. We discuss both phytoplankton and bacterial processes that may explain the reduced ratios of DMS:DMSPt (total dimethylsulphoniopropionate) at higher [H+]. The experimental design of eight treatment levels provides comparatively robust empirical relationships of DMS and DMSP concentration, DMSP production and dinoflagellate biomass versus [H+] in Arctic waters |
format |
Article in Journal/Newspaper |
author |
Archer, S.D. Kimmance, S.A. Stephens, J.A. Hopkins, F.E. Bellerby, Richard Schulz, K.G. Piontek, J. Engel, A. |
spellingShingle |
Archer, S.D. Kimmance, S.A. Stephens, J.A. Hopkins, F.E. Bellerby, Richard Schulz, K.G. Piontek, J. Engel, A. Contrasting responses of DMS and DMSP to ocean acidification in Arctic waters |
author_facet |
Archer, S.D. Kimmance, S.A. Stephens, J.A. Hopkins, F.E. Bellerby, Richard Schulz, K.G. Piontek, J. Engel, A. |
author_sort |
Archer, S.D. |
title |
Contrasting responses of DMS and DMSP to ocean acidification in Arctic waters |
title_short |
Contrasting responses of DMS and DMSP to ocean acidification in Arctic waters |
title_full |
Contrasting responses of DMS and DMSP to ocean acidification in Arctic waters |
title_fullStr |
Contrasting responses of DMS and DMSP to ocean acidification in Arctic waters |
title_full_unstemmed |
Contrasting responses of DMS and DMSP to ocean acidification in Arctic waters |
title_sort |
contrasting responses of dms and dmsp to ocean acidification in arctic waters |
publisher |
European Geosciences Union |
publishDate |
2014 |
url |
http://hdl.handle.net/11250/194288 https://doi.org/10.5194/bg-10-1893-2013 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Ocean acidification Phytoplankton Spitzbergen |
genre_facet |
Arctic Arctic Ocean acidification Phytoplankton Spitzbergen |
op_source |
1893-1908 10 Biogeosciences 3 |
op_relation |
http://www.biogeosciences.net/10/1893/2013/bg-10-1893-2013.html Archer, S.D., Kimmance, S.A., Stephens et al. 2013. Contrasting responses of DMS and DMSP to ocean acidification in Arctic waters. Biogeosciences 10(3) 1893-1908. doi:10.5194/bg-10-1893-2013 urn:issn:1726-4170 http://hdl.handle.net/11250/194288 https://doi.org/10.5194/bg-10-1893-2013 cristin:1035020 |
op_rights |
https://creativecommons.org/licenses/by/3.0/ © Author(s) 2013. This work is distributed under the Creative Commons Attribution 3.0 License. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/bg-10-1893-2013 |
container_title |
Biogeosciences |
container_volume |
10 |
container_issue |
3 |
container_start_page |
1893 |
op_container_end_page |
1908 |
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1766299094835265536 |