05 BiogeochemicalCycles

05 BiogeochemicalCycles - Biogeochemical Cycles The Carbon...

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1 Biogeochemical Cycles The Carbon Cycle CO 2 Plant tissue Animal tissue Soil humus Organic residues Fossil fuels Photosynthesis Herbivory Combustion Respiration Respiration Photosynthesis An autotrophic transformation converting light energy into chemical energy useable by living organisms. 6CO 2 + 6 H 2 O C 6 H 12 O 6 + 6O 2 light The plant cell Chlorophyll Chloroplasts electron transport Herbivory Consumption and metabolism of plant material Ruminant animals, such as cattle, have a complex rumen stomach. Bacteria in the rumen break the cellulose into digestible sugars for the animal. Hypothetical humus molecule
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2 Respiration C 6 H 12 O 6 + 6O 2 6CO 2 + 6 H 2 O + energy Respiration and metabolism of organic carbon. Combustion Organic C + O 2 CO 2 + H 2 O + energy N 2 Biomass N Soil Organic N NH 4 + NO 2 - NO 3 - NO 2 - N 2 O NH 3 (g) N 2 Fixation Mineralization NH 3 Volatilization Nitrification Immobilization plant uptake Leaching Denitrification Nitrogen fixation N 2 R-NH 2 Nitrogen fixation
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This document was uploaded on 11/04/2011 for the course PWS 150 at BYU.

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05 BiogeochemicalCycles - Biogeochemical Cycles The Carbon...

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