explain why nitrogen or phosphorous fertilizers to run into a body of water can negatively affect life in it.?

Answer 1

The fertilizers also fertilize the plants in the water, causing an algal bloom. When the bloom dies, it uses up lots of the oxygen in the water to decompose it. This means less oxygen is available for the animals that live in the water. There have been cases of anoxia (lack of oxygen) in Long Island Sound in the summer (due to run-off) from the land that cause fish kills, and are suspected in the sharp decline in the number of lobsters there.

Answer 2

Actually, like most things, too much fertilizing nutrients will positively affect some life and negatively affect other life.

Fertilizing nutrients (mainly nitrogen and phosphorus) can cause an algae "bloom", which is a huge increase in the growth of algae in the water. Naturally this algae bloom can be harmful to other species and can upset an existing eco-balance.

Some algae secrete toxins. At very high algae levels, water can become dangerously poisonous to humans and some other animals.

Answer 3

Lets see, the nitrogen or phosphorous fertilizers will increase algae growth immensely creating an algal bloom that may or may not kill the area.

Law of limiting nutrient, if nutrient is increased dramatically, growth will in turn be increased dramatically.

Inbalance in ecosystem can create chaos.

Answer 4

Nitrogen and phosphorus are limiting elements in the growth of algae and other plants generally. Putting it in water leads to an overgrowth of algae, which blocks all the light and decreases the oxygen available to animal life in the water.