  We present the first results of a new spectroscopic survey of the cluster
Abell 85 targeting 1466 candidate cluster members within the central $\sim$1
deg$^2$ of the cluster and having magnitudes $m_r < 20.5$ using VIMOS/VLT and
HYDRA/WIYN. A total of 520 galaxies are confirmed as either relaxed cluster
members or part of an infalling population. A significant fraction are low
mass; the median stellar mass of the sample is $10^{9.6} M_{\odot} $, and 25%
have stellar masses below $10^9 M_{\odot}$ (i.e. 133 dwarf galaxies). We also
identify seven active galactic nuclei (AGN), four of which reside in dwarf host
galaxies. We probe the evolution of star formation rates, based on H$\alpha$
emission and continuum modeling, as a function of both mass and environment. We
find that more star forming galaxies are observed at larger clustercentric
distances, while infalling galaxies show evidence for recently enhanced star
forming activity. Main sequence galaxies, defined by their continuum star
formation rates, show different evolutionary behavior based on their mass. At
the low mass end, the galaxies have had their star formation recently quenched,
while more massive galaxies show no significant change. The timescales probed
here favor fast quenching mechanisms, such as ram-pressure stripping. Galaxies
within the green valley, defined similarly, do not show evidence of quenching.
Instead, the low mass galaxies maintain their levels of star forming activity,
while the more massive galaxies have experienced a recent burst.
