Marine nitrogen cycle
Nutrient cycling across the chemocline in the water column and sediments
Natural abundance isotope fractionation
Fate of nitrate in ground-waters entering the marine environment
Paleao-variations in availability nutrients the South Atlantic by using natural abundance nitrogen isotopes

Specialisation

High resolution marine chemistry
Natural abundance stable isotopes (nitrogen and carbon)
Labelling (15-Nitrogen-compound) incubations to determine rates and biochemical reactions
Masspectrometry