title: [Viruses in the plankton of the Rybinsk Reservoir].
abstract: The role of autochthonous viruses in the regulation of bacterioplankton abundance and production was studied in the Rybinsk Reservoir. During the ice-free period, the number of virus-like particles varied within the range of (11.0-57.4) x 10(6) particles/ml. The virus to bacterioplankton abundance ratio ranged within 3.0-9.4. From 4 to 25% of bacterioplankton was infected by phages. A single infected cell contained up to 80 mature virus particles. The phage-induced bacterioplankton mortality in different parts of the reservoir constituted 3.7-41.8% (22.5% on average) of bacterioplankton daily production. Heterotrophic flagellates grazed from 7.6 to 68.8% (27.5% on average) of the daily bacterial production. Thus, along with flagellates, viruses are an important factor controlling bacterioplankton development in the reservoir.
authors.forename: A I
authors.initials: AI
authors.lastname: Kopylov
authors.forename: D B
authors.initials: DB
authors.lastname: Kosolapov
authors.forename: E A
authors.initials: EA
authors.lastname: Zabotkina
mesh_terms: D001419:Bacteria / Q000302:isolation & purification / Q000821:virology*; D018533:Biomass; D015169:Colony Count, Microbial; D017753:Ecosystem; D010933:Plankton / Q000302:isolation & purification / Q000821:virology*; D012426:Russia; D012621:Seasons; D018406:Virus Physiological Phenomena; D014871:Water Microbiology