During summers phytoplankton are dominated by cyanobacteria and occasionally diatoms, most commonly Aphanizomenon cf gracile but also Pseudanabaena limnetica, Planktolyngbya sp. and various species of Anabaena, of whom only Aphanizomenon is potentially poisonous and Anabaena frequently causes algal bloom.
In the summer months, phytoplankton are typically made up of cyanobacteria, occasionally supplemented by diatoms such as Aphanizomenon cf gracile, Pseudanabaena limnetica, Planktolyngbya sp., and various Anabaena species. Notably, only Aphanizomenon can be poisonous, while Anabaena frequently leads to algal blooms.