  SUMMARIZED ABSTRACT:
  We present a study of the stellar populations and morphologies of galaxies in
the core of the galaxy cluster Abell 2218. Integral field spectroscopy was
obtained using<EMAIL_ADDRESS>CAHA to obtain a complete flux limited sample of
cluster members within its field-of-view (~74"X64"). In addition of 31 galaxies
with known redshifts in the outer regions, we built up a final sample of 59
spectroscopically confirmed cluster members. Multiban photometry and detailed
morphologies were obtained using deep images taken with the HST/ACS camera in
the BVRI and z-bands. The CM diagram shows that the E-type galaxies cover the
range of brighter and redder colors. A large fraction of spiral galaxies
($\sim$50%) is found. They cover a wide range in colors. This result, together
with the distributions of ages, metallicities and masses, indicates that E-type
galaxies are more massive and have older stellar populations, while L-type
galaxies are less massive and have a wider range of stellar Our results agree
with a proposed two-step scenario for the evolution of galaxies in clusters. In
addition, an extremely blue merging galaxy system is found at the core, with
the nominal redshift of the cluster.
