中文摘要：

对松花江哈尔滨段水域的硅藻植物群落进行简要分析,结合8个环境变量溶解氧（DO）,氨氮（AN）,酸碱度（pH）,水温（WT）,生物需氧量（BOD）,化学需氧量（COD）,总磷（TP）,总氮（TN）与硅藻种类多度和丰度的之间关系,运用回归统计对硅藻植物群落与环境因素进行相关分析,初步建立多元逐步回归方程,预测硅藻植物与环境变化情况。结果表明硅藻种类的分布与水体的pH值相关性较大,同时与温度,TN,BOD,AN等环境因子有一定的相关性,同时可根据一些硅藻种类的出现初步预测水体发生的相应变化。

英文摘要：

The stepwise multiple regression statistical method was used to calculate the relation between diatoms assemblages and 8 environmental factors such as DO, ammonia nitrogen （AN）, pH, water temperature （WT）, BOD, COD, TP, TN base on the abundance and richness of diatoms in Songhua River, Harbin. The value function graphs were established for each individual parameter and whether the environmental quality is improved or not was observed. The results showed that some taxa of diatoms were related to pH, WT, TN, BOD, AN, the most significant factor is pH. Moreover, the diatom assemblages perfectly predicated the changes of the river.