EVERYDAY SCIENCE

Detailed explanation-1: -increase in the amount on nutrients in an aquatic ecosystem, sometimes caused by upstream runoff. The excess nutrients cause an increase in plant and algaw growth. The number of bacteria in the water also grows, depleting oxygen levels. Fish and other oxygen-dependent organisms may then die.

Detailed explanation-2: -An overabundance of nutrients-primarily nitrogen and phosphorus-in water starts a process called eutrophication. Algae feed on the nutrients, growing, spreading, and turning the water green. Algae blooms can smell bad, block sunlight, and even release toxins in some cases.

Detailed explanation-3: -Excess nutrients fuel the growth of harmful algae blooms, which: block sunlight from reaching underwater grasses, and. during decomposition, create low-oxygen “dead zones” that rob the water of oxygen and suffocate marine life.

Detailed explanation-4: -Excessive nutrients, such as nitrogen and phosphorus, have devastating effects on coastal marine ecosystems by causing algal blooms that deplete oxygen in the water, killing marine life.

Detailed explanation-5: -Another source of phosphorus is fertilizers. Phosphorus enters the ocean via leaching and runoff, where it becomes dissolved in ocean water or enters marine food webs.