BIOGEOCHEMICAL CYCLES

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BIOGEOCHEMICAL CYCLES

• NATURES RECYCLING

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BIOGEOCHEMICAL

• BIO-The elements in living things
• GEO-The elements in Rock or mineral
• CHEMICAL-The elements in a chemical reaction or
  Compound

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4 MAJOR Cycles

• Water
• Carbon
• Nitrogen
• Phosphorous

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Water Cycle

• Precipitation Rain fall
• Surface Run-Off
• Storage of water In ice and snow
• Evaporation water changing to gas from lakes,
  streams and oceans
• Transporation water changing to gas from plants
• Condensation water vapor condenses in the
  atmosphere and leads to precipitation

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Water Cycle
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CARBON

• BASIC BUILDING BLOCK OF LIVING THINGS
• STORED MOSTLY IN THE ATMOSPHERE
• PRODUCED IN RESPIRATION
• USED IN PHOTOSYNTHESIS
• DISSOLVES IN SEAWATER
• FOUND IN COAL, OIL, NATURAL GAS, ANIMAL
  SKELETONS, LIMESTONE

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Carbon Cycle
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NITROGEN

• BUILDING BLOCK OF PROTEINS
• MUST BE CONVERTED FROM NITROGEN GAS (N2) TO
  ANOTHER NITROGEN COMPOUND TO BE USED NITROGEN
  FIXING
• NITROGEN FIXING DONE BY BACTERIA AND ALGAE
• BROKEN DOWN AND RETURNED TO ATMOSPHERE
  DENITRIFYING
• DENITRIFYING DONE BY BACTERIA

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Nitrogen Cycle
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PHOSPHORUS

• BUILDING BLOCK OF GENETIC MATERIAL (DNA,RNA)
• IN ENERGY COMPOUNDS (ATP)
• MOSTLY FOUND IN PHOSPHATE ROCK
• ENTERS CYCLE BY EROSION OR WEATHERING OF ROCK

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Phosphorous Cycle