“…Free-living ciliates inhabit diverse aquatic and terrestrial environments (Foissner et al, 2008;Lynn, 2008), and have an important role in food webs (Finlay and Esteban, 1998;Weisse, 2002Weisse, , 2017Lynn, 2008). Heterotrophic ciliates feed on a lakes (Beaver and Crisman, 1989) and bioindicators of water quality (Madoni, 2005;Jiang et al, 2011;Debastiani et al, 2016), mainly due to the fact that their species richness and biomass are affected by changes in the physicochemical conditions in the water (Mieczan, 2007a(Mieczan, , 2007b2009).…”