Why is too much phosphorus in lakes a problem?
phosphorus stimulates overproduction of bacteria and algae which removes dissolved Oxygen from the water leaving the other organisms without necessary oxygen.
Phosphorus is a fertilizer. The element is a necessary component of DNA. Adding Phosphorus to lake water allows algae and bacteria to multiply rapidly. The rapid growth of the algae and bacteria uses up the available dissolved Oxygen in the environment. Without Oxygen the fish and other organisms die. The lake starts to stink as the algae and bacteria in turn die.