NEET BIOLOGY

Detailed explanation-1: -As sediment, excess nutrients and chemicals flow off of the land, wetlands filter the run off before it reaches open water. Nutrients are stored and absorbed by plants or microorganisms. Sediment settles at the bottom after reaching an area with slow water flow.

Detailed explanation-2: -Wetlands purify our water by removing sediments and other pollutants including chemicals. Wetlands also filter and process excess nutrients that may runoff from agricultural and development sites. Wetlands have been called “the kidneys of our watersheds.”

Detailed explanation-3: -Constructed wetlands make use of the natural purification processes of vegetation, soils and microbes to remove contaminants from discharge. Uses of constructed wetlands for water purification include applications in industrial wastewater and municipal wastewater and storm water treatment.

Detailed explanation-4: -Wetlands can improve water quality by removing pollutants from surface waters. Three pollutant removal processes provided by wetlands are particularly important: sediment trapping, nutrient removal and chemical detoxification.

Detailed explanation-5: -Estuaries filter pollutants and excess sediment, and they stabilize shorelines and protect coastal areas, inland habitats and human communities from floods and storm surges from hurricanes.