Journal
LIMNOLOGY AND OCEANOGRAPHY
Volume 55, Issue 6, Pages 2563-2569Publisher
WILEY
DOI: 10.4319/lo.2010.55.6.2563
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Funding
- European Research Council (ERC) under the European Community [(FP7/2007-2013)/ERC, 205150]
- Federal Ministry of Education and Research (Bundesministerium fur Bildung und Forschung) [03F0608 A03F0608B]
- European Project on Ocean Acidification [211384]
- BMBF
- Spanish Ministry of Education
- European Social Fund
- Ministry of Science and Innovation
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In this laboratory study, we monitored the buildup of biomass and concomitant shift in seawater carbonate chemistry over the course of a Trichodesmium bloom under different phosphorus (P) availability. During exponential growth, dissolved inorganic carbon (DIC) decreased, while pH increased until maximum cell densities were reached. Once P became depleted, DIC decreased even further and total alkalinity (TA) dropped, accompanied by precipitation of aragonite. Under P-replete conditions, DIC increased and TA remained constant in the postbloom phase. A diffusion-reaction model was employed to estimate changes in carbonate chemistry of the diffusive boundary layer. This study demonstrates that Trichodesmium can induce precipitation of aragonite from seawater and further provides possible explanations about underlying mechanisms.
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