Selection of phytoplankton associations in Lake Balaton, Hungary, in response to eutrophication and restoration measures, with special reference to the cyanoprokaryotes

摘要: Restoration of shallow lakes degraded by eutrophication has often been protracted as a consequence the accumulation and subsequent releases phosphorus in their sediments (internal load). Balaton, largest lake Central Europe, underwent rapid during 1960s–1970s, which west-east gradient trophic state developed. Measures to reverse restore its historic quality were initiated mid-1980s. The external load decreased considerably but responses phytoplankton have slight sometimes counterintuitive. At level total biomass, erstwhile distinctiveness down-lake weakened. eukaryotic plankton flora altered little floristic changes dominant cyanoprokaryota are consistent with environmental attributable restoration. species shown consistently related variables including sediment-water interactions, physical disturbances specific biotic adaptations organisms development given years parts fluctuated stochasticity weather. In some years, hypertrophic conditions continued develop, marked prolific cyanoprokaryote blooms; other biomass scarcely exceeded mesotrophic level, composition resembling that obtained prior recent eutrophication. associations represented believed be groups observed elsewhere, suggesting patterns community assembly potentially predictable.