Phytoplankton exometabolite concentrations from laboratory cultures of Crocosphaera watsonii, Micromonas commoda, Prochlorococcus marinus, Synechococcus, Gephyrocapsa huxleyi, and Thalassiosira pseudonana collected from September to December 2022

Blank-corrected concentration data of 56 exometabolites were characterized in laboratory cultures of Gephyrocapsa huxleyi CCMP371, Crocosphaera watsonii WH8501, Micromonas commoda RCC299, Prochlorococcus marinus MIT9301, Synechococcus WH8102, and Thalassiosira pseudonana CCMP1335. Cultures were harvested during the exponential growth phase. Cell count data (available at BCO-DMO project 984095) were used to calculate cell-specific concentrations. Blank-corrected dissolved organic carbon (DOC) concentrations (available at BCO-DMO project 984095) were used to calculate each exometabolite's fraction contribution to phytoplankton-excreted DOC. Raw mass spectrometry files have been deposited to the MetaboLights repository (dataset MTBLS12895).