Average spectral properties of our sample as a function of the local environment. Top panel: Stacked spectrum of the AAOmega members (148) is shown in black. The stacked spectra of galaxies located in overdense regions are shown in red; those in filamentary regions in green; and those in less dense areas, comparable to the field, in blue. All spectra are rest-frame and have been smoothed using a Gaussian kernel with a sigma of 2 pixels. The vertical dashed grey area corresponds to the spectral region of the join between the two arms. Bottom panels: (g − r)_Kron (left) and K_Kron (right) distributions of the galaxies in our sample as a function of the same three δ bins (red, green, and blue).