The Nitrogen Cycle

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  • Created by: Becca1805
  • Created on: 27-05-15 14:22
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  • Nitrogen fixation by free living bacteria
  • Ammonium ions used by plants to make amino acids
  • Oxidation
  • Oxidation
  • Free living, nitrifying bacteria oxidise ammonium ions to form nitrite & nitrate ions in oxygen rich environments as a source of energy
  • Free-living denitrifying bacteria use nitrate ions as a source of oxygen in anaerobic conditions
  • Nitrate ions absorbed by plants to make amino acids and nucleotides
  • Nitrogen fixation by bacteria in root nodules of leguminous plants
  • Decomposers break down nitrogen containing compounds in dead organic matter, faeces and urea into ammonium ions

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