影响湖泊内源磷释放及形态转化的主要因子

浅层湖泊沉积物内源磷的释放主要受沉积物磷含量及其形态所决定,而环境因子通过影响磷的形态转换及分布,可以显著地间接影响磷的释放强度及释放量。本文综述了pH、照度、DO及Eh、水力挠动、温度、水生生物等主要环境因子对浅层湖泊沉积物内源磷形态转化及释放量的影响。目前有关沉积物磷释放的研究多集中在理化因素方面,有必要从生态角度对沉积物中磷的释放规律进行深入的研究。

Affecting factors on the inner sediment phosphorus release and phosphorous species in shallow lakes

In shallow lakes,the phosphorus(P) release from sediments is decided by P contents and P species,whereas environmental factors can indirectly affect the P release to a large extent through changing the P transformation or the P distribution.This paper discusses the environmental factors which affect the P release from shallow lake sediments,including pH,the degree of illumination,DO,Eh,hydraulic dynamic torsion,temperature,and aquatic organisms.In addition,the influence of those environmental factors on P transformation and P distribution is briefly reviewed.Recent sediments P-release studies mainly focus on the effects of various physical and chemical factors on the P release in the sediments,and it is necessary to further research the effect of ecological factors on P release from the sediments in hallow lakes.