Matulewich V A, Finstein M S
Appl Environ Microbiol. 1978 Jan;35(1):67-71. doi: 10.1128/aem.35.1.67-71.1978.
The abundance of nitrifying bacteria, determined by most-probable-number procedures, within habitats of the Passaic River was as follows: rooted aquatic plants greater than algae approximately equal to rocks greater than sediments greater than greater than water. On the average, NH4+ oxidizers were 540-fold more abundant in the topmost 1 cm of sediment than in the water, and NO2- oxidizers were 250-fold more abundant. The population densities in this surface sediment at two nearby stations, one with a predominantly mineral stream bed and the other an organic ooze, did not differ significantly. Large numbers of nitrifiers were present to a depth of about 5 cm in a mineral sediment core.
采用最大可能数法测定，帕塞伊克河内各生境中硝化细菌的数量如下：有根水生植物＞藻类≈岩石＞沉积物＞＞水。平均而言，在沉积物最上层1厘米处，铵氧化菌的数量比水中多540倍，亚硝酸盐氧化菌的数量多250倍。在附近两个站点的表层沉积物中，一个站点的河床主要是矿物质，另一个是有机软泥，其种群密度没有显著差异。在一个矿物质沉积物岩芯中，大量硝化细菌存在至约5厘米深处。
