Chapter 5: The Biogeochemical Cycles
Chapter 5: The Biogeochemical Cycles
Chapter 5: The Biogeochemical Cycles
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<strong>The</strong> Carbon Cycle<br />
• Carbon enters the biota through<br />
photosynthesis and is returned by<br />
respiration or fire.<br />
– When organisms die, decomposition releases<br />
carbon as CO 2 or Methane (CH 4 ).<br />
– Under certain conditions carbon is not be<br />
released<br />
• Transformed into fossil fuels<br />
• Deposition as marine sediments CaCO 3