Seawater carbonate chemistry, chlorophyll a and phosphate during experiments with Trichodesmium erythraeum IMS101 (CCMP1985), 2010


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.

In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI).

Supplement to: Kranz, Sven A; Wolf-Gladrow, Dieter A; Nehrke, Gernot; Langer, Gerald; Rost, Björn (2010): Calcium carbonate precipitation induced by the growth of the marine cyanobacteria Trichodesmium. Limnology and Oceanography, 55(6), 2563-2569

Related Identifier
Metadata Access
Creator Kranz, Sven A; Wolf-Gladrow, Dieter A; Nehrke, Gernot; Langer, Gerald; Rost, Björn
Publisher PANGAEA
Contributor Nisumaa, Anne-Marin
Publication Year 2010
Funding Reference Seventh Framework Programme, 211384; Sixth Framework Programme, 511106
Rights Creative Commons Attribution 3.0 Unported;
OpenAccess true
Language English
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 2017 data points
Discipline Earth System Research