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	Center for Coastal Physical Oceanography
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RESEARCH LAB

Margaret R. Mulholland
Associate Professor

Laboratory Members (from Left to Right in Photo)

Laboratory Facilities

Chemical hoods
Laminar flow hood.
pH meters
Balances
Heat blocks
Freeze dryer
Muffle furnace
Drying oven
Light-and temperature-controlled incubators
Filtration equipment
Barnstadt water purification system
Shimadzu high performance liquid chromatography system with refrigerated autosampler, column oven, fraction collector, photodiode and fluorescence detectors and three pumps
Shimadzu gas chromatography system with capillary and packed column inlets and FID detector
Olympus epifluorescence microscope
Zeiss inverted microscope
Shimadzu spectrophotometer
Turner fluorometers
Shimadzu spectrofluorometer
Eppendorf centrifuge
Europa 20/20 Isotope Ratio Mass Spectrometer with ANCA Elemental Analyzer and Gas Autosampler
Astoria Pacific 6-channel nutrient analyzer
Hydrolab DataSonde 4a Multiprobe with conductivity, temperature, dissolved oxygen, pH, nitrate and dual PAR light sensors and Surveyor 4A data display with extended memory
Biospherical Instruments QSL-2100 Scalar PAR Irradiance Sensor with pocket PC

Water Column Biogeochemistry Research Group

A variety of work is conducted in Dr. Mulholland's lab. Broadly, these include:

Cycling of dissolved organic N (DON) and dissolved inorganic N (DIN) in coastal and oceanic systems
N and C cycling in coastal systems prone to algal blooms
Uptake and regeneration of N and C in coastal and oceanic systems
Enzymatic degradation of proteins and amino acids
N2 fixation and the fate of new N in marine systems
Hydrogen sulfide production by phytoplankton
C cycling in systems dominated by mixotrophic phytoplankton
Competition for dissolved N and C among marine microbes

Fieldwork for these projects is done in a variety of systems including: