Top: mean galaxy connectivity (shown by the pixel colours) in the mass vs. 1 + δ_DTFE plane as a function of cosmic environments (from left to right panels). The dashed grey lines show the limits of the four different galaxy populations studied in Sect. 6. Bottom: corresponding bootstrap errors. The dark green pixels (error values of zero) need to be interpreted with caution as they represent bins with only one galaxy (see the number counts in Fig. E.2).