Abstract:

In this review,the harmful effects of cyanobacterial blooms were analyzed from these areas,i.e.the balance of water ecosystems,water quality,human and other animal health risks,water ecological landscape.The causes of cyanobacterial blooms,including internal factors(a series of specific biochemical regulatory mechanisms or characteristics adapting to high temperature,three pigment systems-lowlight compensation mechanism,luxury consumption mechanisms,nitrogen fixation-nutrition compensatory mechanisms, dormancy-a mechanism to avoid adverse conditions,mechanisms to suppress competitors and predators by producing toxins),environmental factors (physical factors such as temperature,light,perturbation and mixing,water residence time;chemical factors,such as major nutrients,micro nutrient elements,dissolved inorganic carbon,dissolved organic carbon and salinity)and biological factors(grazing,microorganism action and symbiosis with higher plants and animals)were analyzed. And studies on the ecological control methods of cyanobacterial blooms,such as microbiological control algae,large aquatic plants control algae and aquatic animal control algae(traditional biomanipulation,nontraditional biomanipulation and control of algae by tilapia)were also reviewed.〖