Abstract
Understanding the importance of environmental effects on galaxy evolution is a key step in the scenario of hierarchical structure in the Universe. In this context we present the first results of multifrequency surveys in the nearby clusters, A 1367 (z=0.02) and A 85 (z=0.05), and a preliminary analysis of HST images of two galaxies showing striking morphology disruption in the more distant (z=0.2) clusters, A 1689 and A 2667. Goals: (1) Study the effects of environment as a function of cluster properties and as a function of z. (2) Get an independent method to trace cluster substructure. (3) Spread the variety of physical properties of clusters imaged in HI, and push these studies to higher z. This enable to discriminate between cosmic evolution (Nature) and physical diversity from cluster to cluster (Nurture), to better understand the density-morphology relation and the Butcher-Oemler effect in clusters.