Journal article
Ocean acidification has different effects on the production of dimethylsulfide and dimethylsulfoniopropionate measured in cultures of Emiliania huxleyi and a mesocosm study: a comparison of laboratory monocultures and community interactions
Environmental Chemistry, Vol.13(2), pp.314-329
2016
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Source: InCites
Abstract
The human-induced rise in atmospheric carbon dioxide since the industrial revolution has led to increasing oceanic carbon uptake and changes in seawater carbonate chemistry, resulting in lowering of surface water pH. In this study we investigated the effect of increasing CO2 partial pressure (pCO2) on concentrations of volatile biogenic dimethylsulfide (DMS) and its precursor dimethylsulfoniopropionate (DMSP), through monoculture studies and community pCO2 perturbation. DMS is a climatically important gas produced by many marine algae: it transfers sulfur into the atmosphere and is a major influence on biogeochemical climate regulation through breakdown to sulfate and formation of subsequent cloud condensation nuclei (CCN). Overall, production of DMS and DMSP by the coccolithophore Emiliania huxleyi strain RCC1229 was unaffected by growth at 900 μatm pCO2, but DMSP production normalised to cell volume was 12 % lower at the higher pCO2 treatment. These cultures were compared with community DMS and DMSP production during an elevated pCO2 mesocosm experiment with the aim of studying E. huxleyi in the natural environment. Results contrasted with the culture experiments and showed reductions in community DMS and DMSP concentrations of up to 60 and 32 % respectively at pCO2 up to 3000 μatm, with changes attributed to poorer growth of DMSP-producing nanophytoplankton species, including E. huxleyi, and potentially increased microbial consumption of DMS and dissolved DMSP at higher pCO2. DMS and DMSP production differences between culture and community likely arise from pH affecting the inter-species responses between microbial producers and consumers.
Details
- Title
- Ocean acidification has different effects on the production of dimethylsulfide and dimethylsulfoniopropionate measured in cultures of Emiliania huxleyi and a mesocosm study: a comparison of laboratory monocultures and community interactions
- Creators
- Alison L Webb - University of East AngliaGill Malin - University of East AngliaFrances E Hopkins - Plymouth Marine LaboratoryKai Lam Ho - University of East AngliaUlf Riebesell - GEOMAR Helmholtz Centre for Ocean Research KielKai G Schulz - Southern Cross UniversityAud Larsen - Uni ResearchPeter S Liss - University of East Anglia
- Publication Details
- Environmental Chemistry, Vol.13(2), pp.314-329
- Publisher
- CSIRO Publishing
- Grant note
- The Bergen 2011 mesocosm experiment was part of the SOPRAN (Surface Ocean Processes in the Anthropocene; 03F0611C) 2 Programme funded by the German Ministry for Education and Research (BMBF) and led by the GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany. This work was funded by a UK Natural Environment Research Council Directed Research Studentship (NE/H025588/1) through the UK Ocean Acidification Research Programme, with CASE funding from Plymouth Marine Laboratory. Additional funding was provided by the MINOS project funded by EU-ERC (project number 250254).
- Identifiers
- 991012927082302368
- Copyright
- Journal compilation © CSIRO 2016
- Academic Unit
- Faculty of Science and Engineering; Science; Centre for Coastal Biogeochemistry
- Language
- English
- Resource Type
- Journal article