Volatile Organic Compounds Released by Oxyrrhis marina Grazing on Isochrysis galbana

A range of volatile organic compounds (VOCs) have been found to be released during zooplankton grazing on microalgae cultivated for commercial purposes. However, production grazing-derived VOCs from environmentally relevant species and their potential contribution oceanic emissions the atmosphere remains largely unexplored. Here, we aimed qualitatively explore suite produced due using laboratory cultures marine microalga Isochrysis galbana herbivorous heterotrophic dinoflagellate Oxyrrhis marina with without antibiotic treatment. The were measured a Vocus proton-transfer-reaction time-of-flight mass spectrometer, coupled segmented flow coil equilibrator. We alternative increases dimethyl sulfide by up 0.2 nmol dm−3 methanethiol 10 pmol depending presence or absence bacteria regulated Additionally, toluene xylene increased about 30 dm−3, respectively only, supporting biological source these compounds. Overall, our results highlight that beyond are grazing, prompt further quantification this in budgets process-based understanding VOC cycling surface ocean.