Effects of metal concentration in the sediment on metal concentration in E. danica and its BSAF. (A) Effect of changes in Cr concentration in the sediment (Cr_s) during the investigation period on its concentration in E. danica (Cr_E, black circles) and BSAF (Cr_B, open triangles) at the investigated localities on the Skrapež River. The black solid line represents the linear fit of the data in the case of Cr_E (R = 0.80, P < 0.001) and the grey one in the case of Cr_B (R = –0.77, P < 0.001). (B) Effect of changes in Cd concentration in the sediment (Cd_s) during the investigation period on its concentration in E. danica (Cd_E, black circles) and BSAF (Cd_B, open triangles) at the investigated localities on the Skrapež River. The black solid line represents the linear fit of the data in the case of Cd_E (R = –0.54, P = 0.030) and the grey one in the case of Cd_B (R = –0.88, P < 0.001). (C) Effect of changes in Cu concentration in sediment (Cu_s) during the investigation period on its concentration in E. danica (Cu_E, black circles) and BSAF (Cu_B, open triangles) at the investigated localities on the Skrapež River. The black solid line represents the linear fit of the data in the case of Cu_E (R = 0.72, P = 0.002) and the grey one in the case of Cd_B (R = 0.53, P = 0.036).