云南省高原深水湖泊程海磷形态分布和变化

采用GPS定位,在程海设置了3个断面9个采样点,对各种形态磷进行了为期1 a的研究,分析了高原深水湖泊程海磷形态分布和变化.结果表明:程海中总磷含量范围为0.008～0.155 mg/L,年平均值为0.046 mg/L,含量水平已经较高.存在形态是颗粒态总磷占54.35%;溶解态有机磷占19.56%;溶解态无机磷占26.09%.各形态磷时间分布和变化与水生生物特别是浮游植物生命活动和周期变化密切相关;水平分布格局受浮游生物活动、湖流风动等综合影响;由水表层-亚底层垂直分布比较均匀,湖底层含量不同程度升高.

Distribution and variations of phosphorus speciation in Lake Chenghai on plateau, Yunnan Province

Nine sampling sites along three sections in Lake Chenghai were established by Global Positioning System for a study on phosphorus forms in a period of a year.The characteristics of the distribution and variations of phosphorus forms in deep lake on plateau are analyzed.The results indicate that the total phosphorus content is between 0.008 and 0.155mg/L,and the annual average content is 0.046mg/L.The percent of existent state of phosphorus forms is 54.35% particulate total phosphorus,19.56% dissolved organic phosphorus,26.09% dissolved inorganic phosphorus.The characteristics of the distributions and variations of phosphorus forms are closely related to vital processes and cycles of phytoplankton.The horizontal distribution pattern is easily affected by the composites effects of biological processes of plankton,and movement and feeding of lake water.The distribution of phosphorus is relatively homogenous from the surface layer to the sub-bottom layer,and increase with various degrees at the bottom layer.