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Carbon cycle – units = Gt C = 10 15 g C

Carbon cycle – units = Gt C = 10 15 g C. Carbon dioxide. 1. 2. 3. Pathways of Nitrogen. Denitrification Via NO, N 2 O. N 2 Molecular Nitrogen. Nitrogen Fixing. NH 4 + Ammonium ion / Ammonia. NO 2 -1 Nitrite. Nitrification. Nitrification. Denitrification. Ammonification.

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Carbon cycle – units = Gt C = 10 15 g C

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  1. Carbon cycle – units = Gt C = 10 15 g C

  2. Carbon dioxide 1 2 3

  3. Pathways of Nitrogen Denitrification Via NO, N2O N2 Molecular Nitrogen Nitrogen Fixing NH4+ Ammonium ion / Ammonia NO2-1 Nitrite Nitrification Nitrification Denitrification Ammonification Amino Acids Organic Nitrogen Assimilation NO3-1 Nitrate Assimilation

  4. Nitrogen Fixing Denitrification Via NO, N2O N2 Molecular Nitrogen Nitrogen Fixing NH4+ Ammonium ion / Ammonia NO2-1 Nitrite Nitrification Nitrification Denitrification Ammonification Amino Acids Organic Nitrogen Incorporation NO3-1 Nitrate Assimilation

  5. Nitrification Denitrification Via NO, N2O N2 Molecular Nitrogen Nitrogen Fixing NH4+ Ammonium ion / Ammonia NO2-1 Nitrite Nitrification Nitrification Denitrification Ammonification Amino Acids Organic Nitrogen Incorporation NO3-1 Nitrate Assimilation

  6. Nitrification • NO2-1 -> NO3-1 and NH4+ -> NO2-1 • Oxidizing nitrogen • Nitrosomonas and Nitrococcus

  7. Incorporation/Assimilation Denitrification Via NO, N2O N2 Molecular Nitrogen Nitrogen Fixing NH4+ Ammonium ion / Ammonia NO2-1 Nitrite Nitrification Nitrification Denitrification Ammonification Amino Acids Organic Nitrogen Assimilation NO3-1 Nitrate Assimilation

  8. Ammonification Denitrification Via NO, N2O N2 Molecular Nitrogen Nitrogen Fixing NH4+ Ammonium ion / Ammonia NO2-1 Nitrite Nitrification Nitrification Denitrification Ammonification Amino Acids Organic Nitrogen Incorporation NO3-1 Nitrate Assimilation

  9. Denitrification Denitrification Via NO, N2O N2 Molecular Nitrogen Nitrogen Fixing NH4+ Ammonium ion / Ammonia NO2-1 Nitrite Nitrification Nitrification Denitrification Ammonification Amino Acids Organic Nitrogen Incorporation NO3-1 Nitrate Assimilation

  10. Human impacts on the Earth’s ecosystems

  11. Biotic addition and loses

  12. Land transformation

  13. Global biochemistry

  14. Climate change

  15. Ecosystem services Definition: refers to all the processes through which natural ecosystems and the species they contain help sustain human life on this planet. Examples: Purification of air and water, mitigation of droughts and floods, generation and preservation of soils and soil fertility, detoxification and decomposition of wastes, pollination of crops and natural vegetation, dispersal of seeds

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