Distributions characterizing the nature of mergers, in the different environments. From left to right: number of merger events, redshift at which mergers happened, mass ratio between the galaxy involved, mass accreted by mergers in galaxies. In each panel, circles and horizontal lines show median values along with the 25th and 75th percentiles of the distributions. In the third panel, vertical dashed lines indicate the threshold commonly adopted to separate minor and major mergers (1:4).