Abstract
In this paper we present the most important results on the properties of star forming dwarf galaxies (SFDGs) in nearby clusters. We emphasize those studies based on Hα emission since this indicator provides relevant information about the effect on the ionized gas component of several mechanisms directly related to the cluster environment. Deep Hα imaging surveys in nearby clusters have shown clear signatures of the action of ram pressure combined with tidal interactions acting on dwarf galaxies which result on enhanced star formation rates (SFRs) and distorted morphology of the ionized gas component. In addition, the existence of ultra-compact SFDGs has been reported for two nearby clusters, suggesting that they could be the progenitors of the already known ultra-compact early-type galaxies. Finally, details about a work in progress intended to the compilation of a sample of Hα selected SFDGs in nearby clusters are given.
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