Marine & Environmental Sciences Faculty Proceedings, Presentations, Speeches, Lectures

DMSP Cell Quotes from Flow Cytometrically-Sorted Phytoplankton from Diverse Oceanic Regions

Event Name/Location

2014 Ocean Sciences Meeting, Honolulu, Hawaii, February 23-28, 2014

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Cellular quotas of various biogenic sulfur compounds in phytoplankton are a function of taxonomic class and physiological status of the organism. Biogenic S compounds such as dimethylsulfide (DMS) are thought to be climatically active. Numerical models to determine global DMS fluxes from the ocean to the atmosphere are dependent on knowledge concerning the intracellular concentration in various phytoplankton functional groups as well as the environmental factors that trigger the production of the DMS precursor, dimethylsulfoniopropionate (DMSP). However, species specific DMSP cell quotas from various natural oceanic environments are relatively unknown. Phytoplankton populations were collected from various oceanic provinces using sorting flow cytometry to determine the concentration of intracellular DMSP. Large differences were observed in intracellular DMSP when comparing algal cultures with field populations. Various environmental parameters such as nutrient limitation or viral infection led to significant changes in cellular DMSP quotas.

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