The surface and core sediments from Rongcheng swan lake were collected to study the spatial and vertical distribution of different phosphorus forms,and the relationship between physico-chemical characteristics and phosphorus forms of sediments was also analyzed.Results showed that the concentrations of total phosphorus(TP) of sediments were not high,ranging from 79.15 mg/kg to 565.12 mg/kg.High space diversity of TP and phosphorus forms in sediments among different regions was observed.From the northwest to...