the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
High production of nitrous oxide (N2O), methane (CH4) and dimethylsulphoniopropionate (DMSP) in a massive marine phytoplankton culture
Abstract. The production of large amounts of algal biomass for different purposes such as aquaculture or biofuels, may cause impacts on the marine environment. One such impact is the production of radiatively active trace gases and aerosols with climate cooling (dimethyl sulfide DMS and its precursor DMSP) and warming (N2O and CH4) effects. Total and dissolved DMSP, N2O and CH4, together with other environmental variables were monitored daily for 46 days within a massive microalgae monoculture of Nannochloris (Chlorophyceae) in an open pond system. The growth of this green microalgae was stimulated by the addition of N- and P-rich salts, resulting in exponential growth (growth phase) during the first 17 days observed by cell abundance (1 × 106 to 4.4 × 106 cell mL−1) and Chl-a levels (from 1.4 to 96 mg Chl-a m−3) followed by a decrease in both Chl-a and cell abundance (senescence phase). Total DMSP (from 6.3 to 142 μmol m−3), dissolved DMSP i.e. 5.8 to 137 μmol m−3 and N2O (from 8 to 600 μmol m−3) abruptly peaked during the senescence phase, whereas CH4 steadily increased between 2 and 10 μmol m−3 during the growth phase. Different ratios between tracers and Chl-a during both phases reveal different biochemical processes involved in the cycling of these gases and tracers. Our results show that despite the consumption of large quantities of CO2 by the massive algal culture, a minor amount of DMS and huge amounts of greenhouse gases were produced, in particular N2O, which has a greater radiative effect per molecule than CO2. These findings have important implications for biogeochemical studies and for environmental management of aquaculture activities.
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RC C2765: 'Review of the ms of Florez-Leiva et al,', Anonymous Referee #1, 07 Sep 2010
- AC C3142: 'Reply', Laura Farias, 04 Oct 2010
- RC C3290: 'Comments to bg-2010-217', Anonymous Referee #2, 12 Oct 2010
- SC C3511: 'Response to Referee 2', Laura Farias, 26 Oct 2010
-
RC C2765: 'Review of the ms of Florez-Leiva et al,', Anonymous Referee #1, 07 Sep 2010
- AC C3142: 'Reply', Laura Farias, 04 Oct 2010
- RC C3290: 'Comments to bg-2010-217', Anonymous Referee #2, 12 Oct 2010
- SC C3511: 'Response to Referee 2', Laura Farias, 26 Oct 2010
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Cited
9 citations as recorded by crossref.
- Nitrous Oxide (N<sub>2</sub>O) production in axenic <i>Chlorella vulgaris</i> microalgae cultures: evidence, putative pathways, and potential environmental impacts B. Guieysse et al. 10.5194/bg-10-6737-2013
- Methane-oxidizing seawater microbial communities from an Arctic shelf C. Uhlig et al. 10.5194/bg-15-3311-2018
- Nitrous oxide emissions from high rate algal ponds treating domestic wastewater C. Alcántara et al. 10.1016/j.biortech.2014.10.134
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- Carbon and nitrogen mass balance during flue gas treatment with Dunaliella salina cultures T. Harter et al. 10.1007/s10811-012-9870-9
- Chlamydomonas reinhardtii, an Algal Model in the Nitrogen Cycle C. Bellido-Pedraza et al. 10.3390/plants9070903
- Volatile Metabolites Emission by In Vivo Microalgae—An Overlooked Opportunity? K. Achyuthan et al. 10.3390/metabo7030039
- N2O emissions during microalgae outdoor cultivation in 50 L column photobioreactors M. Plouviez et al. 10.1016/j.algal.2017.08.008
- 15 years of research on wastewater treatment high rate algal ponds in New Zealand: discoveries and future directions D. Sutherland & P. Ralph 10.1080/0028825X.2020.1756860