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The thesis deals with fast growing unicellular cyanobacteria (Synechocystis sp. PCC 6803 and Cyanobium gracile A1) and slower growing filamentous cyanobacteria capable of fixing atmospheric nitrogen (Anabaena lemmermannii, Anabaena compacta and Anabaena reniformis). The experiment was designed to observe the growth of selected representatives from both these types at different temperatures in media with different concentrations of nitrogen. Growth was measured using on optical density at a wavelength of 550 nm. The results from the individual measurements were graphically evaluated using growth curves. The cell size and cell volumes of each strain were also determined. It was concluded that at higher temperature and at higher nitrogen concentrations, most of the cyanobacteria showed higher growth. It can be concluded that during the summer period, in our ponds with sufficient nitrogen, these cyanobacteria will readily increase their biomass and thus influence pond management. |
