Biogeochemical cycle; Introduction and description

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These slides includes brief content on the introduction, types and disturbances of biogeochemical cycles occurring on land

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Biogeochemical cycle; Introduction and description

  1. 1. Introduction
  2. 2. What is a biogeochemical cycle? The cycling of chemical elements required by life between living and non-living part of environment is called biogeochemical cycle.
  3. 3. The examples of elements are;  Carbon  Nitrogen  Oxygen  Phosphorus  Sulfur  Water o o All these elements are macro-elements. Other chemical elements in the cycle which are formed as intermediates can be microelements.
  4. 4.  These elements are cycled through; Gas cycle Sediment cycle Sediment + Gas cycle • Carbon • Nitrogen • Oxygen • Phosphorus • Sulfur • Water
  5. 5. BIOLOGICAL BIOGEOCHEMICAL CYCLE GEOLOGICAL CHEMICAL
  6. 6. The duration of cycle depends upon;  Chemical reactivity of the substance  Chemical state of substance Important biogeochemical cycles are;  Carbon cycle  Nitrogen cycle  Oxygen cycle  Phosphorus cycle  Sulfur cycle  Water cycle
  7. 7. We need biogeochemical cycles Storage of key elements  Transport of key elements  To make the key elements available for organisms  To balance the ecosystem  Recycle the energy 
  8. 8. Causes of disturbance of biogeochemical cycles  o o o o o   Human activities: Burning of coal Pollution Deforestation Vegetation defoliation Wastage of non-renewable sources Depletion of natural sources Global warming
  9. 9. The need of the hour is that we must try to reduce the harmful activities to protect the LIFE..

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