Nitrates (compound of nitrogen) and phosphates (compound of phosphorous) are found in fertilizers and some detergents. When these compounds go into the water system through runoff what happens?

Algal Blooms that are caused by the excess of nitrogen and phosphorous. These algal blooms choke out all other plants and animals. When the nitrogen and phosphorous run out then the algae dies and bacteria decompose the algae. Decomposers take oxygen from water and create a dead zone due to the lack of oxygen.

Algal Blooms that are caused by the excess of nitrogen and phosphorous. These algal blooms choke out all other plants and animals. When the nitrogen and phosphorous run out then the algae dies and bacteria decompose the algae. Decomposers release oxygen into the water and create a dead zone due to the excess of oxygen.

The correct answer is: Algal Blooms that are caused by the excess of nitrogen and phosphorous. These algal blooms choke out all other plants and animals. When the nitrogen and phosphorous run out then the algae dies and bacteria decompose the algae. Decomposers take oxygen from water and create a dead zone due to the lack of oxygen.