For example, with the improvement of the scale and intensity of aquaculture, freshwater eutrophication problems have become more serious that many harmful algae, such as Microcystis aeruginosa, do harm to the fish with releasing of algal toxins, changing in dissolved oxygen and addling. 随着养殖规模和强度的提高,许多淡水水体富营养化程度日趋严重。以铜绿微囊藻为代表的许多有害藻类大量暴发,通过释放藻毒素、影响溶氧、腐臭等方式危害养殖鱼类。