[Nitrifying bacteria and nitrification in sediment at the adjacent sea area of Yangtze River Estuary in summer].

The influence factors and environmental effects of nitrification process were discussed based on the measurements of nitrifier quantities and nitrification rates at eight sites off Yangtze River Estuary in June 2006. Using FISH (Fluorescence in situ hybridization) method, the nitrifying bacteria were counted as 1.87 x 10(5) -3.