The species composition of oligotrophic bacterial communities of Lake Balaton--a numerical analysis

From among the 565 aerobic and facultatively anaerobic, oligotrophic bacterial isolated obtained from the open water region of the Balatonfüred-bay, 58 representative strains were selected for detailed taxonomic-physiological studies and numerical analyses as well as simultaneous comparisons with authentic bacterial strains isolated earlier by Langó (1987) from different water habitat of the Lake Balaton. On the basis of 186 ceded differential diagnostic characteristics involved in these analyses and comparisons, the representative strains were classified into 6 larger similarity groups (I. Micrococcus spp.; II. Arthrobacter "globiformis"; III. Acinetobacter calcoaceticus; IV. Pseudomonas spp. I; V. Pseudomonas spp. II; VI. Aeromonas spp.) which were partly further divided into smaller subgroups of species level (IV.a. Pseudomonas palleronii; V.a. Pseudomonas pseudoalcaligenes; V.b. Pseudomonas acidovorans; V.c. Pseudomonas fluorescens; VI.a. Aeromonas caviae; VI.b. Aeromonas hydrophila).