Distribution of picocyanobacteria and virioplankton in mesotrophic and eutrophic reservoirs: The role of viruses in mortality of picocyanobacteria

0353246 - BC 2011 RIV US eng J - Journal Article
Kopylov, A.I. - Kosolapov, D.B. - Zabotkina, E.A. - Straškrábová, Viera
Distribution of picocyanobacteria and virioplankton in mesotrophic and eutrophic reservoirs: The role of viruses in mortality of picocyanobacteria.
Biology Bulletin. Roč. 37, č. 6 (2010), s. 565-573. ISSN 1062-3590. E-ISSN 1608-3059
Institutional research plan: CEZ:AV0Z60170517
Keywords : cyanobacteria * cyanophages * upper Volga reservoirs
Subject RIV: DJ - Water Pollution ; Quality
Impact factor: 0.222, year: 2010

Distribution of picocyanobacteria (PICO) and cyanophages (CPH) were studied in mesotrophic and mesoeutrophic Sheksna and Rybinsk reservoirs of Volga-Baltic Waterway system (21 sampling stations between 59 to 60 degree North and 37 to 38 degree East, depths from 1.3 to 9 m, surface water temperature 20.5 to 22.7 degree C). The share of PICO in phytoplankton biomass and production decreased along with the increase the trophy. Daily total phytoplankton production varied from 100 to 726 carbon per cubic m. The abundance of CPH as well as infection and virus-induced mortality of PICO, in the opposite, increased (doubled). Mortality of PICO from viral lysis increased up to 52% of their daily production in the stations where phytoplankton blooms developed and at the parts affected by communal pollution.
Permanent Link: http://hdl.handle.net/11104/0192542