Figure 1.
Location of the Chaobai River Watershed in the Hai River Basin and the distribution of the sampling sites.
Table 1.
TN, TP and heavy metal concentrations in the water from the studied rivers in the Chaobai River Watershed (each concentration is the mean ± the standard deviation).
Table 2.
Main species found in the three periphyton types found in the rivers in the Chaobai River Watershed and the eutrophication conditions (TN and TP concentrations) in the ambient water.
Figure 2.
Heavy metal concentrations in the three types of periphyton and their bioconcentration factors (BCFs).
Figure 3.
Linear regressions between the Ni concentration and the Cr, Cu and Pb concentrations (mg/kg) in the three periphyton types (as a total on the left and separately on the right).
The concentrations were log-transformed.
Table 3.
Spearman correlation coefficients for the heavy metal concentrations in the periphyton.