**5.4 Symptoms and effects of eutrophication**

The following are the symptoms of eutrophication:


The following are the effects of eutrophication:

1.Microcystins are certain toxins produced by various genera of cyanobacteria, the predominant one being Microcystis sp. These toxins are highly water-stable and resistant to boiling, and thus pose a threat to water and food quality if not properly monitored. Exposure to microcystins represents a health risk to aquatic organisms, wildlife, domestic animals, and humans upon drinking or

ingesting cyanobacteria in the water. These substances can enter the food chain and cause mortality in an animal apart from other health effects in humans.

