Ocean acidification affects iron speciation during a coastal seawater mesocosm experiment

Rising atmospheric CO2 is acidifying the surface ocean, a process which is expected to greatly influence the chemistry and biology of the future ocean. Following the development of iron-replete phytoplankton blooms in a coastal mesocosm experiment at 350, 700, and 1050 μatm pCO2, we observed signifi...

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Bibliographic Details
Published in:Biogeosciences
Main Authors: Breitbarth, E., Bellerby, R. J., Neill, C. C., Ardelan, M. V., Meyerhöfer, Michael, Zöllner, Eckart, Croot, Peter, Riebesell, Ulf
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications (EGU) 2010
Subjects:
Ocean acidification
Online Access:https://oceanrep.geomar.de/id/eprint/10202/
https://oceanrep.geomar.de/id/eprint/10202/1/bg-7-1065-2010.pdf
https://doi.org/10.5194/bg-7-1065-2010
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Summary:Rising atmospheric CO2 is acidifying the surface ocean, a process which is expected to greatly influence the chemistry and biology of the future ocean. Following the development of iron-replete phytoplankton blooms in a coastal mesocosm experiment at 350, 700, and 1050 μatm pCO2, we observed significant increases in dissolved iron concentrations, Fe(II) concentrations, and Fe(II) half-life times during and after the peak of blooms in response to CO2 enrichment and concomitant lowering of pH, suggesting increased iron bioavailability. If applicable to the open ocean this may provide a negative feedback mechanism to the rising atmospheric CO2 by stimulating marine primary production.

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