三峡库区水体磷浓度对蓝藻垂直迁移的影响  

INFLUENCE OF PHOSPHORUS CONCENTRATION ON CYANOBACTERIA′S VERTICAL MIGRATION IN THE THREE GORGES RESERVOIR AREA

作　　者：湛敏[1,2] 姚建玉[1,3] 张云怀[1,3] 郑登典[1] 

机构地区：[1]重庆大学化学化工学院,重庆400030 [2]重庆大学材料科学与工程学院,重庆400030 [3]重庆市三峡库区自然生态系统结构与系统模拟重点实验室,重庆400030

出　　处：《环境化学》2011年第5期935-941,共7页Environmental Chemistry

基　　金：国家自然科学基金(No.20877105);重庆大学"211工程"三期创新人才培养计划项目(No.S-09013)资助

摘　　要：通过建立蓝藻细胞内部营养状态磷份额模型和水体磷浓度对蓝藻聚集体垂直迁移影响模型,模拟计算了水体中不同磷浓度对蓝藻聚集体垂直迁移速度及迁移距离的影响.结果表明,蓝藻细胞内磷份额与水体中的磷浓度密切相关.当水体磷浓度为0.075 mg·L-1时,水华暴发压力不大;当水体中磷浓度达到0.090 mg·L-1时,最大迁移距离已经接近4 m,较易发生水华;在水体中磷浓度达到0.1 mg·L-1时蓝藻就会迁移到水体表层且不再向下迁移,此时极易暴发水华.In this paper,the coupling effect between the concentration of phosphorus in water and the velocity and distance of vertical transport of cyanobacteria aggregates was investigated by establishing a phosphorus quota model of interior nutrition condition in cyanobacteria cell and studying the influence of the concentration of phosphorus in water on vertical transport of cyanobacteria aggregates.The results show that the phosphorus quota in cyanobacteria cells is closely related to the concentration of phosphorus in water.When the concentration of phosphorus in water reaches 0.075 mg · L-1,water bloom does not occur easily.Maximum migration distance of cyanobacteria aggregates is close to 4 m when the concentration reaches to 0.09 mg · L-1,and algae bloom easily.When the concentration is 0.1 mg · L-1 cyanobacteria aggregates move up to the surface of water and no longer move downward,Algae blooms occur.

关 键 词：蓝藻 水体磷浓度 磷份额 垂直迁移 

分 类 号：X524[环境科学与工程—环境工程]