Eutrophication ppt

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Biology eutrophication

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Eutrophication ppt

  1. 1. …..EUTROPHICATION
  2. 2. Compare these 2 ponds, the bottom one experiencing eutrophication.
  3. 3. When lakes, streams and estuaries are over fertilized, excessive production of aquatic organic matter can become a water quality problem and as a result the Eutrophication process can be enhanced!
  4. 4. However, humans in their everyday activities can exacerbate the process: Point sources (can locate the cause)  Sewage treatment plant discharges  Storm sewer discharges  Industrial discharges Non-point sources (can’t locate the cause, it’s everywhere)  Atmospheric deposition  Agricultural runoff (fertilizer, soil erosion)  Septic systems
  5. 5. 1. Fertilizer flows into water causing…. 2. Increased plant growth on the surface of water, causing….. 3. Decreased light in lower levels of water, causing… 4. Plants in lower levels of water to die, causing…. 5. Decay using up O2 and increasing CO2,causing…... 6. Death of fish and other animals. STEPS OF EUTROPHICATION
  6. 6. LACK OF OXYGEN GROWTH OF BACTERIA DEATH OF PLANTS SUFFOCATION GROWTH OF PLANTS ADDITION OF NITRATES Eutrophication process in 6 stages
  7. 7. Before increases in nutrients:Before increases in nutrients:
  8. 8. Acceleration of Eutrophication :
  9. 9. Results of Eutrophication :
  10. 10. These fish died due to Eutrophication removing the oxygen.
  11. 11. Photo 1: Algal bloom in a lake. Algal bloom in a lake.
  12. 12. Fish mortality due to lack of oxygen in an Indonesian lake. Algal blooms, otherwise called "nuisance algae" or "harmful algal blooms", are toxic to plants and animals
  13. 13. Blue Baby Syndrome - An illness that begins when large amounts of nitrates in water are ingested by an infant and converted to nitrite by the digestive system. He nitrite then reacts with ox hemoglobin (the oxygen-carrying blood protein) to form metheglobin, which cannot carry oxygen. If a large enough amount of metheglobin is formed in the blood, body tissues may be deprived of oxygen, causing the infant to develop a blue coloration of their mucous membranes and possibly digestive and respiratory problems. This condition is also known as methemoglobinemia.
  14. 14. : Overgrowth of floating aquatic plants.
  15. 15. Eutrophication can be avoided by using minimal required amounts of chemical fertilizers or better still do away with them and use natural ones instead. Be sure not to have the fields close to the water bodies. Take extra care while using fertilizers during monsoons as due to run - off, they get transmitted to the water bodies. Then , they can cause blockage of water ways, death of marine life n breakage of food chain.
  16. 16. http://in.answers.yahoo.com/question/index?qi d=20070303105817AANPIba

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