中文摘要：

通过监测云蒙湖前置库系统对水体总磷（TP）和总氮（TN）全年空间格局影响,及主要环境因子pH、溶解氧（DO）、氧化还原电位（Eh）和典型植物生物量的动态变化,分析生物量及环境因子和氮磷格局之间的关系。结果表明：云蒙湖水体氮磷含量在前置库系统影响下呈条带状分布,自东汶河入湖口向湖中心地区逐渐降低,总体呈现西南低东北高的趋势;前置库系统全年对水体均具有净化作用;前置库系统通过对环境因子溶解氧（DO）、pH和氧化还原电位（Eh）提高的方式来提高对水体氮磷的净化效果,从而影响水体氮磷含量的空间分布;前置库系统植物将大量氮磷富集于植物体内,通过人为收割的方式将氮磷转移出水体,是前置库影响水体氮磷含量的直接方式。

英文摘要：

The influence of Yunmeng lake pre-reservoir system on annual total nitrogen（TN） and total phosphorus（TP） spatial pattern was investigated.The main environmental factors pH,dissolved oxygen（DO）,redox potential（Eh） and biomass were monitored.Relationship between P and N concentration and biomass,environmental factors were analyzed.The results indicated that the concentrations of N and P in Yunmeng lake had a banding distribution influenced by Yunmeng lake pre-reservoir system.The concentrations of N and P gradually decreased from Dongwenhe lake inlet to the centre of Yunmeng lake,the concentrations were higher in the southwest than those in the northeast of the lake.The pre-reservoir system had water purification function in the whole year.The pre-reservoir system increased N and P removal rate through increasing the value of pH,dissolved oxygen（DO） and redox potential（Eh）,and affected spatial pattern of N and P.Plant in the pre-reservoir system absorbed a great deal of N and P,and were harvested from the water system,which was the direct way that the pre-reservoir system affected the concentrations N and P.