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Using oligonucleotide probes for Eubacteria and four eubacterial subgroups, we monitored changes in bacterial community composition (BCC) with different degrees of grazing pressure, as follows: unfiltered water (UNF, all bacterivores present); 4 μm) increased in treatments that yielded large increases in bacterivory. Filament formation also showed season‐specific features; in experiment I, all filaments belonged into ALF, whereas in experiment II, most of them hybridized with the C/F probe. We conclude that the sudden shifts that violate the established balance between bacterial production and the protist‐induced bacterial mortality led to the significant shifts in cell morphology and BCC.
Šimek et al. (Tue,) studied this question.