Describe the changes that take place at each stage of eutrophication?

Answer 1

1. 1) Release of Organic materials in to the water bodies, 2) Due to increase in Organic materials rapid growth of Algae and other plants takes place, 3) With the algal bloom, the sunlight is blocked and most of them die 4) They start rotting 5) The decomposers acting on the rotting algae take up all the oxygen 6) The animals inhabiting the water bodies start dying.

Answer 2

In the first stage, excess nutrients like nitrogen and phosphorus accumulate in the water, leading to increased algal growth. In the second stage, the increased algae block sunlight from reaching underwater plants, causing them to die. In the third stage, the dead vegetation decomposes and depletes oxygen levels, leading to a decrease in oxygen for aquatic species. Ultimately, the ecosystem becomes imbalanced and may result in fish kills and other negative impacts.