Fig 1.
Flow chart of sediment P fractionation procedure.
Fig 2.
Changes in physicochemical properties: (a) EC, (b) Eh, (c) water pH, (d) sediment pH, (e) water DOC, (f) sediment TOC, (g) water AlPase activity and (h) sediment AlPase activity.
Fig 3.
Water P fractions and sediment P release rate at different temperatures: (a) total P, (b) total dissolved P, (c) soluble reactive P of water and (d) sediment P release rate.
Fig 4.
Changes in total, organic and inorganic P fractions at different temperatures: (a) total P, (b) total organic P, (c) total inorganic P and (d) proportion of organic P.
Fig 5.
Changes in sediment P fractions at different temperatures.
Fig 6.
Relationships between P release rate and Eh (a), DOC (b) in water, and total organic C (c), AlPase activity (d), inorganic P (e), and organic P (f) in the sediment.
Fig 7.
Ordination diagram from constrained redundancy analysis (RDA) of the relationship between the P fractions and those of water and sediment biochemical properties in three temperatures.