Effect of the Pulsed Addition of Phosphorous on the Growth and Toxin Production of the Bloom-Forming Cyanobacterium Chrysosporum ovalisporum (Forti) Zapomelová et al.

Eutrophication and global warming boost the outbreak of cyanobacterial blooms spread invasive species such as Chrysosporum ovalisporum. Different from often steady-state conditions under laboratory cultivation, external input nutrients in natural water is intermittent pulsed, which may affect response cyanobacteria. In this study, we cultured C. ovalisporum two phosphorus treatment patterns: a one-time five-time pulsed with same total dosing. Our results showed that deficiency inhibits growth ovalisporum, thereby significantly reducing its biomass photosynthetic activity (p < 0.05). addition, led to secrete more exopolysaccharides alkaline phosphatase. Compared treatment, multiple pulses promoted absorption by inhibited synthesis phosphatase but had no significant effect on release cylindrospermopsin (CYN). We also found growth-promoting low concentrations. indicated overall strong adaptability dynamic changes phosphate levels column provide new insight into dispersal strategies