Comparison of nitrogen fixation rates determined with different methods : a study in the Baltic Proper

  title={Comparison of nitrogen fixation rates determined with different methods : a study in the Baltic Proper},
  author={Norbert Wasmund and G{\"u}nther Nausch and Bernd Schneider and K. Nagel and Maren Voss},
Nitrogen fixation rates were determined at approximately monthly intervals during spring/summer 2001 in the eastern Gotland Sea by means of the N2 method. Additionally, a comprehensive set of variables were measured in order to apply 3 different budget approaches for the determination of integrated nitrogen fixation: (1) the nutrient concept based on excess PO4 owing to the low DIN/PO4 ratios (6.8) in the winter surface water, (2) the CO2 concept using a combined carbon/nitrogen mass balance… CONTINUE READING
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