Diatoms are an important group of aquatic ecosystems
and diatom-based indices are increasingly becoming important tools
for the assessment of ecological conditions in lotic systems. Although
the studies are very limited about Turkish rivers, diatom indices were
used for monitoring rivers in different basins. In the present study, we
used OMNIDIA program for estimation of stream quality. Some
indices have less sensitive (IDP, WAT, LOBO, GENRE, TID, CEE,
PT), intermediate sensitivities (IDSE, DESCY, IPS, DI-CH, SLA,
IDAP), the others higher sensitivities (SID, IBD, SHE, EPI-D).
Among the investigated diatom communities, only a few taxa
indicated alfa-mesosaprobity and polysaprobity. Most of the sites
were characterized by a great relative contribution of eutraphent and
tolerant ones as well as oligosaprobic and betamesosaprobic diatoms.
In general, SID and IBD indices gave the best results. This study
suggests that the structure of benthic diatom communities and diatom
indices, especially SID, can be applied for monitoring rivers in