Effects of increased pCO2 and temperature on the North Atlantic spring bloom. III. Dimethylsulfoniopropionate
The CLAW hypothesis argues that a negative feedback mechanism involving phytoplankton- derived dimethylsulfoniopropionate (DMSP) could mitigate increasing sea surface temperatures that result from global warming. DMSP is converted to the climatically active dimethylsulfide (DMS), which is transferre...
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ftunivnebraskali:oai:digitalcommons.unl.edu:plantpathpapers-1594 2023-11-12T04:22:02+01:00 Effects of increased pCO2 and temperature on the North Atlantic spring bloom. III. Dimethylsulfoniopropionate Lee, Peter A. Rudisill, Jamie R. Neeley, Aimee R. Maucher, Jennifer M. Hutchins, David A. Feng, Yuanyuan Hare, Clinton E. Leblanc, Karine Rose, Julie M. Wilhelm, Steven W. Rowe, Janet M. DiTullio, Giacomo R. 2009-01-01T08:00:00Z application/pdf https://digitalcommons.unl.edu/plantpathpapers/589 https://digitalcommons.unl.edu/context/plantpathpapers/article/1594/viewcontent/Lee_MEPS_2009_Effects_of_increased_pCO2.pdf unknown DigitalCommons@University of Nebraska - Lincoln https://digitalcommons.unl.edu/plantpathpapers/589 https://digitalcommons.unl.edu/context/plantpathpapers/article/1594/viewcontent/Lee_MEPS_2009_Effects_of_increased_pCO2.pdf Papers in Plant Pathology Particulate DMSP Dissolved DMSP Climate change Global warming Carbon dioxide Temperature Biogeochemistry Other Plant Sciences Plant Biology Plant Pathology Plant Sciences text 2009 ftunivnebraskali 2023-10-30T11:44:57Z The CLAW hypothesis argues that a negative feedback mechanism involving phytoplankton- derived dimethylsulfoniopropionate (DMSP) could mitigate increasing sea surface temperatures that result from global warming. DMSP is converted to the climatically active dimethylsulfide (DMS), which is transferred to the atmosphere and photochemically oxidized to sulfate aerosols, leading to increases in planetary albedo and cooling of the Earth’s atmosphere. A shipboard incubation experiment was conducted to investigate the effects of increased temperature and pCO2 on the algal community structure of the North Atlantic spring bloom and their subsequent impact on particulate and dissolved DMSP concentrations (DMSPp and DMSPd). Under ‘greenhouse’ conditions (elevated pCO2; 690 ppm) and elevated temperature (ambient + 4°C), coccolithophorid and pelagophyte abundances were significantly higher than under control conditions (390 ppm CO2 and ambient temperature). This shift in phytoplankton community structure also resulted in an increase in DMSPp concentrations and DMSPp:chl a ratios. There were also increases in DMSP-lyase activity and biomass-normalized DMSP-lyase activity under ‘greenhouse’ conditions. Concentrations of DMSPd decreased in the ‘greenhouse’ treatment relative to the control. This decline is thought to be partly due to changes in the microzooplankton community structure and decreased grazing pressure under ‘greenhouse’ conditions. The increases in DMSPp in the high temperature and greenhouse treatments support the CLAW hypothesis; the declines in DMSPd do not. Text North Atlantic University of Nebraska-Lincoln: DigitalCommons@UNL |
institution |
Open Polar |
collection |
University of Nebraska-Lincoln: DigitalCommons@UNL |
op_collection_id |
ftunivnebraskali |
language |
unknown |
topic |
Particulate DMSP Dissolved DMSP Climate change Global warming Carbon dioxide Temperature Biogeochemistry Other Plant Sciences Plant Biology Plant Pathology Plant Sciences |
spellingShingle |
Particulate DMSP Dissolved DMSP Climate change Global warming Carbon dioxide Temperature Biogeochemistry Other Plant Sciences Plant Biology Plant Pathology Plant Sciences Lee, Peter A. Rudisill, Jamie R. Neeley, Aimee R. Maucher, Jennifer M. Hutchins, David A. Feng, Yuanyuan Hare, Clinton E. Leblanc, Karine Rose, Julie M. Wilhelm, Steven W. Rowe, Janet M. DiTullio, Giacomo R. Effects of increased pCO2 and temperature on the North Atlantic spring bloom. III. Dimethylsulfoniopropionate |
topic_facet |
Particulate DMSP Dissolved DMSP Climate change Global warming Carbon dioxide Temperature Biogeochemistry Other Plant Sciences Plant Biology Plant Pathology Plant Sciences |
description |
The CLAW hypothesis argues that a negative feedback mechanism involving phytoplankton- derived dimethylsulfoniopropionate (DMSP) could mitigate increasing sea surface temperatures that result from global warming. DMSP is converted to the climatically active dimethylsulfide (DMS), which is transferred to the atmosphere and photochemically oxidized to sulfate aerosols, leading to increases in planetary albedo and cooling of the Earth’s atmosphere. A shipboard incubation experiment was conducted to investigate the effects of increased temperature and pCO2 on the algal community structure of the North Atlantic spring bloom and their subsequent impact on particulate and dissolved DMSP concentrations (DMSPp and DMSPd). Under ‘greenhouse’ conditions (elevated pCO2; 690 ppm) and elevated temperature (ambient + 4°C), coccolithophorid and pelagophyte abundances were significantly higher than under control conditions (390 ppm CO2 and ambient temperature). This shift in phytoplankton community structure also resulted in an increase in DMSPp concentrations and DMSPp:chl a ratios. There were also increases in DMSP-lyase activity and biomass-normalized DMSP-lyase activity under ‘greenhouse’ conditions. Concentrations of DMSPd decreased in the ‘greenhouse’ treatment relative to the control. This decline is thought to be partly due to changes in the microzooplankton community structure and decreased grazing pressure under ‘greenhouse’ conditions. The increases in DMSPp in the high temperature and greenhouse treatments support the CLAW hypothesis; the declines in DMSPd do not. |
format |
Text |
author |
Lee, Peter A. Rudisill, Jamie R. Neeley, Aimee R. Maucher, Jennifer M. Hutchins, David A. Feng, Yuanyuan Hare, Clinton E. Leblanc, Karine Rose, Julie M. Wilhelm, Steven W. Rowe, Janet M. DiTullio, Giacomo R. |
author_facet |
Lee, Peter A. Rudisill, Jamie R. Neeley, Aimee R. Maucher, Jennifer M. Hutchins, David A. Feng, Yuanyuan Hare, Clinton E. Leblanc, Karine Rose, Julie M. Wilhelm, Steven W. Rowe, Janet M. DiTullio, Giacomo R. |
author_sort |
Lee, Peter A. |
title |
Effects of increased pCO2 and temperature on the North Atlantic spring bloom. III. Dimethylsulfoniopropionate |
title_short |
Effects of increased pCO2 and temperature on the North Atlantic spring bloom. III. Dimethylsulfoniopropionate |
title_full |
Effects of increased pCO2 and temperature on the North Atlantic spring bloom. III. Dimethylsulfoniopropionate |
title_fullStr |
Effects of increased pCO2 and temperature on the North Atlantic spring bloom. III. Dimethylsulfoniopropionate |
title_full_unstemmed |
Effects of increased pCO2 and temperature on the North Atlantic spring bloom. III. Dimethylsulfoniopropionate |
title_sort |
effects of increased pco2 and temperature on the north atlantic spring bloom. iii. dimethylsulfoniopropionate |
publisher |
DigitalCommons@University of Nebraska - Lincoln |
publishDate |
2009 |
url |
https://digitalcommons.unl.edu/plantpathpapers/589 https://digitalcommons.unl.edu/context/plantpathpapers/article/1594/viewcontent/Lee_MEPS_2009_Effects_of_increased_pCO2.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Papers in Plant Pathology |
op_relation |
https://digitalcommons.unl.edu/plantpathpapers/589 https://digitalcommons.unl.edu/context/plantpathpapers/article/1594/viewcontent/Lee_MEPS_2009_Effects_of_increased_pCO2.pdf |
_version_ |
1782337212494381056 |