Our previous studies show that the tidal flat of the Tokyo Port Wild Bird Park is a sink of nitrogen. Denitrification and anammox can be cited as one of the factors. In the present study, we measured denitrification and anammox rates in tidal flat sediments and investigated about the factors affecting its rates. Results from the study show that (1)the rates of denitrification and anammox affected by DIN concentration and DO concentration, (2)the anammox rates affected by the number of anammox bacteria.
