Dataset: Light limited growth rate

VOCs were collected from axenic. Dunaliella tertiolecta (urn:lsid:marinespecies.org:taxname:178590) and Thalassiosira weissflogii (urn:lsid:marinespecies.org:taxname:163513) using proton transfer reaction time-of-flight mass spectroscopy (PTR-TOF/MS; Ionicon, Austria) as previously described (Moore et al., 2020). Autoclaved f/2+Si media was measured alongside the samples as blank (background) controls. 100 ml culture, media, or HPLC water was transferred to a dynamic stripping chamber (Halsey et al., 2017) and bubbled with breathing-grade air passed first through a hydrocarbon trap and then through a glass frit in the bottom of the chamber at 50 ml min^-1 for 5 min to strip VOCs from the sample. The stripped gasses were directed into the PTR-ToF/MS for measurement via soft ionization with H₃O⁺. The mass spectrum (30-240 a.m.u.) was acquired at 5 s intervals.  PTR-TOF/MS data were analyzed using PTR viewer 3.4.3 (Ionicon Analytik). A three-point calibration was performed on each .h5 file using a search range of 0.2 m/z. Within the three-point calibration mode, each mass spectrum was calibrated against three internal standards known to be present within the spectrum, namely 29.998 (NO+), 203.943, and 330.848 (1,3-diiodobenzene).