"Uptake rate standard error (daily) of nitrate {NO3- CAS 14797-55-8} per unit time per unit area of the water body [particulate >GF/F phase] by isotope-labelled tracer addition, incubation at different light levels, filtration and mass spectrometry on residue and profile integration"@en . . "INSEIIP1" . "Isotope doped incubation experiment (GF/F filtered)" . .