What happens when nutrient levels become too concentrated in rivers, lakes, and oceans?

When nutrient levels get too high, water quality degrades and oxygen levels are depleted through a process known as

Eutrophication is what happens when nutrient levels become too concentrated in rivers, lakes, and oceans. Eutrophication is when the levels of nutrients and minerals in a body of water become too concentrated. It is usually induced by the release of nitrate or phosphate-containing substances into a water body.