Phytoplankton-bacteria coupling under elevated CO2 levels: a stable isotope labelling study, 2010 ...

• Main Authors: de Kluijver, Anna, Soetaert, Karline, Schulz, Kai Georg, Riebesell, Ulf, Bellerby, Richard G J, Middelburg, Jack J
• Format: Dataset
• Language: English
• Published: PANGAEA 2010
• Subjects: Experimental treatment; Experiment day; Phytoplankton, biomass as carbon; Bacteria, biomass as carbon; Coccolithophoridae, biomass as carbon; Diatoms, biomass as carbon; Green algae, biomass as carbon; Growth rate; Carbon, inorganic, dissolved; Labelled phytoplankton in sediment traps relative to labelled phytoplankoton in water column; Labelled bacteria in sediment traps relative to labelled bacteria in water column; Phytoplankton, delta-delta, weighted; Bacteria, delta-delta, weighted; Calculated, see references; modelled; European Project on Ocean Acidification EPOCA; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.758223; https://doi.pangaea.de/10.1594/PANGAEA.758223

The potential impact of rising carbon dioxide (CO2) on carbon transfer from phytoplankton to bacteria was investigated during the 2005 PeECE III mesocosm study in Bergen, Norway. Sets of mesocosms, in which a phytoplankton bloom was induced by nutrient addition, were incubated under 1x (~350 µatm), 2x (~700 µatm), and 3x present day CO2 (~1050 µatm) initial seawater and sustained atmospheric CO2 levels for 3 weeks. 13C labelled bicarbonate was added to all mesocosms to follow the transfer of carbon from dissolved inorganic carbon (DIC) into phytoplankton and subsequently heterotrophic bacteria, and settling particles. Isotope ratios of polar-lipid-derived fatty acids (PLFA) were used to infer the biomass and production of phytoplankton and bacteria. Phytoplankton PLFA were enriched within one day after label addition, whilst it took another 3 days before bacteria showed substantial enrichment. Group-specific primary production measurements revealed that coccolithophores showed higher primary production than ... : Supplement to: de Kluijver, Anna; Soetaert, Karline; Schulz, Kai Georg; Riebesell, Ulf; Bellerby, Richard G J; Middelburg, Jack J (2010): Phytoplankton-bacteria coupling under elevated CO2 levels: a stable isotope labelling study. Biogeosciences, 7(11), 3783-3797 ...