EN
It was demonstrated that significant differences in the abundance of individual physiological groups of bacteria existed among the lakes studied, sampling sites, as well as seasons.Ammonifying, denitrifying and glucose acidifying bacteria constituted the most abundant groups of planktonic and benthic organisms.Bacteria producing hydrogen sulfide and reducing sulfates were rather infrequent.In the case of both water and sediments, microflora of three lakes studied exibited very similar potential ability to carry out the processes of macromolecule degradation.Among bacterai isolated from the two zones, the most abundant were strains hydrolizing proteins, lipids and starch.Only small percentage of strains carried out depolymerization of cellulose.