Phosphorus cycle

1. Topic : Phosphorus Cycle

2. The Phosphorus Cycle
 Phosphorus:
 cell membranes
 ATP - Adenosine tri PHOSPHATE
 bones - calcium phosphate
 Two methods of P recycling:
 geological (abiotic)
 living organisms (biotic)

3. Long Term Cycle
 Most common form: a part of rocks
 Properties:
 soluble - dissolve in water
 Phosphates dissolve in water—erosion
carries them from land to streams and rivers
and then finally to the oceans
 Oceanssediments may be thrust upward
and once again form land through geological
activity

4. Long Term Cycle

5. Short Term Cycle
 Phosphates in water also enter the food chain
through photosynthetic organisms
 Decomposition of dead organismssoluble
phosphates are absorbed by plants and used
during photosynthesis
 Plants are eaten by animals

6. Short Term Cycle

7. Phosphorous Cycle