2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/7065We present observations of galaxy environmental dependencies using data from the 2dF Galaxy Redshift Survey. From a combined analysis of the luminosity function, Butcher-Oemler effect and trends in H$α$ line strengths we find support for a model where galaxy properties are mainly set by initial conditions at the time of their formation.Oral presentation at 'Multiwavelength Mapping of Galaxy Evolution' conference (Venice). 6 pages, 4 figures. Springer style file includedAstrophysicstext