Flagellates and ciliates were studied over one year, with 52 species identified including 17 flagellates and 35 ciliates. Flagellates were numerically dominant and included cryptomonads, dinoflagellates, and euglenoids. Ciliates included prostomatians, oligotrichs, and gymnostomatians. Species composition and abundance remained consistent spatially but varied seasonally, with flagellates most abundant pre-monsoon and post-monsoon while ciliates followed similar patterns. Cluster analysis identified two flagellate assemblages and three ciliate assemblages dominated by different species. The dam-side protozoan community differed from catchment areas in presence of indicator

1. Flagellates and ciliates are the two major groups observed
during one year study
 Total of 52 species encountered of which 17 species
flagellates and 35 species ciliates
 Flagellates mainly cryptomonads, dinoflagellates and
euglenoids
Ciliates belonging to prostomatians, oligotrichs,
gymnostomatians
Numerically flagellates outnumbered ciliates
Species composition and abundance do not varied much
spatially.
Seasonally flagellates were numerically abundant during
pre-monsoon and post monsoon periods and ciliates
followed the flagellate abundance

2. • Cluster analysis revealed two assemblages of flagellates
and three assemblages of ciliates
• Flagellate assemblage 1. belongs to euglenoids and 2.
cryptomonads
• Ciliate assemblage mostly by Oligotrichs and
prostomatians. Halteria grandinella and strobilidium sp.
Are most abundant species observed during the study
• How ever the damside protozoan community differed from
catchment area with more existance of indicator species
like Coleps hirtus and vorticella natans at station 1 and
oligitrichs at catchment areas.

3. • How ever the damside protozoan community differed from catchment
area with more existance of indicator species like Coleps hirtus and
vorticella natans at station 1 and oligitrichs at catchment areas.