Table 3. A comparison of the environmental factors affecting MC production of cyanobacteria from literatures and the present study.

Algae studied	Promoting factors	Inhibiting factors	Insignificant parameters	Reference
Microcystis aeruginosa	High light intensity	Low light intensity	Temperature and nutrients	Watanabe and Oishi, 1985
Microcystis aeruginosa	High iron concentration		Nutrients	Utkilen and Gjølme, 1995
Microcystis aeruginosa	High pH exceeded the value of 8.4			Jahnichen et al., 2001
Microcystis aeruginosa	Irradiances under the optimal point for growth	Irradiances higher than the optimal point for growth		Wiedner et al., 2003
Microcystis aeruginosa	Fish			Jang et al., 2004
Microcystis aeruginosa	Increasing intracellular inorganic carbon deficiency			Jahnichen et al., 2007
Microcystis aeruginosa	Nonylphenol of 0.05–0.5 mg/L			Wang et al., 2007
Microcystis aeruginosa	Infochemicals from zooplankton			Jang et al., 2008
Microcystis viridis	Both low and high pH (pH 7.0 and pH 9.2), lower light intensity	High light intensity	Temperature and nutrients	Song et al., 2007
Microcystis spp.	Increase nutrient loading			Vezie et al., 2002
Microcystis spp.	Optimum temperature (21.5°C,), high DIC and pH, low conductivity, competition with macrophytes		Nutrients	Present study
Oscillatoria agardhii	High nutrients concentration, low light intensity and optimal temperature	High light intensity		Sivonen, 1990
Planktothrix spp.	High cyanobacteria abundance, water depth		Temperature, irradiance and macronutrients	Halstvedt et al., 2008