Normalised growth rate Γ_n (Eq. (2)) vs. filament length for four consecutive redshift intervals. For each panel, the x-axis corresponds to the filament lengths of the lowest redshift of the interval. The yellow lines indicate the 68% and 95% contours of the signal (pink colourbar), while the grey contours correspond to a random signal computed by associating filaments and progenitors in a random way, thus breaking the structure of the evolutionary tracks.