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Carbon cycle – units = Gt C = 10 15 g C. Carbon dioxide 1 2 3.

Published byGael Longton Modified over 9 years ago

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Presentation on theme: "Carbon cycle – units = Gt C = 10 15 g C. Carbon dioxide 1 2 3."— Presentation transcript:

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

2 Carbon dioxide 1 2 3

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4 Pathways of Nitrogen N 2 Molecular Nitrogen NH 4 + Ammonium ion / Ammonia Nitrogen Fixing Amino Acids Organic Nitrogen Assimilation Ammonification NO 2 -1 Nitrite NO 3 -1 Nitrate Denitrification Via NO, N 2 O Assimilation Nitrification Denitrification

5 Nitrogen Fixing N 2 Molecular Nitrogen NH 4 + Ammonium ion / Ammonia Nitrogen Fixing Amino Acids Organic Nitrogen Incorporation Ammonification NO 2 -1 Nitrite NO 3 -1 Nitrate Denitrification Via NO, N 2 O Assimilation Nitrification Denitrification

6 Nitrification N 2 Molecular Nitrogen NH 4 + Ammonium ion / Ammonia Nitrogen Fixing Amino Acids Organic Nitrogen Incorporation Ammonification NO 2 -1 Nitrite NO 3 -1 Nitrate Denitrification Via NO, N 2 O Assimilation Nitrification Denitrification

7 Nitrification NO 2 -1 -> NO 3 -1 and NH 4 + -> NO 2 -1 Oxidizing nitrogen Nitrosomonas and Nitrococcus

8 Incorporation/Assimilation N 2 Molecular Nitrogen NH 4 + Ammonium ion / Ammonia Nitrogen Fixing Amino Acids Organic Nitrogen Assimilation Ammonification NO 2 -1 Nitrite NO 3 -1 Nitrate Denitrification Via NO, N 2 O Assimilation Nitrification Denitrification

9 Ammonification N 2 Molecular Nitrogen NH 4 + Ammonium ion / Ammonia Nitrogen Fixing Amino Acids Organic Nitrogen Incorporation Ammonification NO 2 -1 Nitrite NO 3 -1 Nitrate Denitrification Via NO, N 2 O Assimilation Nitrification Denitrification

10 N 2 Molecular Nitrogen NH 4 + Ammonium ion / Ammonia Nitrogen Fixing Amino Acids Organic Nitrogen Incorporation Ammonification NO 2 -1 Nitrite NO 3 -1 Nitrate Denitrification Via NO, N 2 O Assimilation Nitrification Denitrification

11 Human impacts on the Earth’s ecosystems

12 Biotic addition and loses

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14 Land transformation

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17 Global biochemistry

18 Climate change

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22 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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