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….. EUTROPHICATION

….. EUTROPHICATION. 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!. Eutrophication is a natural process!.

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….. EUTROPHICATION

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  1. …..EUTROPHICATION

  2. 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!

  3. Eutrophication is a natural process! 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

  4. BEFORE EUTROPHICATION AFTEREUTROPHICATION Eutrophication: a process by which a body of water progresses from its origin to its extinction. This process happens in stages.

  5. Eutrophication process in 6 stages ADDITION OF NITRATES GROWTH OF PLANTS DEATH OF PLANTS GROWTH OF BACTERIA LACK OF OXYGEN SUFFOCATION

  6. The process of Eutrophication

  7. The process of Eutrophication cont.

  8. Biochemical Oxygen Demand (BOD). This measures the rate of oxygen consumption by a sample of water, and therefore gives a good indication of eutrophication. A high BOD means lots of organic material and aerobic microbes, i.e. eutrophication

  9. Eutrophication process in 6 stages ADDITION OF NITRATES GROWTH OF PLANTS DEATH OF PLANTS GROWTH OF BACTERIA LACK OF OXYGEN SUFFOCATION

  10. Before increases in nutrients:

  11. Acceleration of eutrophication :

  12. Results of eutrophication :

  13. Photo 1: Algal bloom in a lake.

  14. Photo 23: Lake Biwa, the largest lake in Japan during summer time showing overgrowth of aquatic plants.

  15. Photo 4: Fish mortality due to lack of oxygen in an Indonesian lake.

  16. Put in order the stages of Eutrophication! LACK OF OXYGEN DEATH OF PLANTS GROWTH OF BACTERIA GROWTH OF PLANTS SUFFOCATION ADDITION OF NITRATES

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