Radial abundance gradients for all the sample, using the annular binning scheme for the spectral extraction. On each redshift regime annuli are one pixel wide (on its corresponding scale). In each panel the three redshift regimes are over-plotted, the empty circles correspond to Z0, the blue circles to Z1, and the orange squares to Z2 as usual. The black line indicates the Z0 abundance gradient determined in Sect. 5.2.3.