Fig. 6: Contribution of small phytoplankton to bulk CO2-fixation.
From: Small phytoplankton contribute greatly to CO2-fixation after the diatom bloom in the Southern Ocean

Relative (a) and absolute (b) contribution of the different groups of small phytoplankton to bulk CO2-fixation were obtained by multiplying mean CO2-fixation rates (nanoSIMS) by the abundance of the groups (flow cytometry enumeration). Bulk contribution was measured with EA-IRMS.