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Ecology Review Natural Cycles
Cycles <ul><li>Carbon Cycle </li></ul><ul><li>Nitrogen Cycle </li></ul><ul><li>Water Cycle </li></ul>
The Carbon Cycle
Sinks & Sources <ul><li>Carbon Sinks </li></ul><ul><ul><li>Places that absorb more carbon than they release </li></ul></ul...
 
Nitrogen Fixation <ul><li>Conversion of Inert N 2  into bio-usable forms  </li></ul><ul><li>atmospheric fixation  by light...
Nitrification <ul><li>Nitrification – whatever form of ammonia is applied to the soil, it must be converted to be used by ...
Hydrological Cycle
Hydrological Cycle <ul><li>Describes the continuous movement of water on, above, and below the surface of the Earth  </li>...
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Ecology review 2

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Transcript of "Ecology review 2"

  1. 1. Ecology Review Natural Cycles
  2. 2. Cycles <ul><li>Carbon Cycle </li></ul><ul><li>Nitrogen Cycle </li></ul><ul><li>Water Cycle </li></ul>
  3. 3. The Carbon Cycle
  4. 4. Sinks & Sources <ul><li>Carbon Sinks </li></ul><ul><ul><li>Places that absorb more carbon than they release </li></ul></ul><ul><ul><li>Plants (photosynthesis) </li></ul></ul><ul><ul><li>Forests </li></ul></ul><ul><ul><li>Soil </li></ul></ul><ul><li>Carbon Sources </li></ul><ul><ul><li>Places or things that release more carbon than they absorb </li></ul></ul><ul><ul><li>Combustion </li></ul></ul><ul><ul><li>Respiration </li></ul></ul><ul><ul><li>Decomposition </li></ul></ul>
  5. 6. Nitrogen Fixation <ul><li>Conversion of Inert N 2 into bio-usable forms </li></ul><ul><li>atmospheric fixation by lightning </li></ul><ul><li>biological fixation by certain microbes </li></ul><ul><ul><li>alone </li></ul></ul><ul><ul><li>symbiotic relationship with some plants and animals </li></ul></ul><ul><li>industrial fixation – Haber Process </li></ul>
  6. 7. Nitrification <ul><li>Nitrification – whatever form of ammonia is applied to the soil, it must be converted to be used by plants </li></ul><ul><ul><li>NH 3 + Nitrosomonas -> NO 2 </li></ul></ul><ul><ul><li>NO 2 + Nitrobacter -> NO 3 </li></ul></ul><ul><li>NO 3 Very soluble form </li></ul><ul><ul><li>Only held loosely by soil colloids (clay & humus) </li></ul></ul><ul><ul><li>~ 5% of NO 3 dissolves in water and is lost by leaching </li></ul></ul>
  7. 8. Hydrological Cycle
  8. 9. Hydrological Cycle <ul><li>Describes the continuous movement of water on, above, and below the surface of the Earth </li></ul><ul><li>Individual water molecules can come and go in a hurry, but there is always the same amount of water on the surface of the earth. </li></ul>
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