BIOGEOCHEMICAL CYCLES Moretz, 2013/2014 Biology CARBON CYCLE Carbon

BIOGEOCHEMICAL CYCLES Moretz, 2013/2014 Biology CARBON CYCLE Carbon

BIOGEOCHEMICAL CYCLES Moretz, 2013/2014 Biology CARBON CYCLE Carbon cycle: NITROGEN CYCLE Biological nitrogen fixation

NH3 & NH4- Atmospheri c nitrogen (N2) Nitrogen fixation by humans Decomposition Internal

cycling Plant & animal proteins Assimilatio n Nitrificatio n NO3- Denitrificatio

n PHOSPHOROUS CYCLE Phosphate rocks Excretion / decompositio n Internal cycling Marine organism s Marine

sediment s Phosphate mining Fertilizer containing phosphate s Erosion Animals, crops

Dissolved phosphate s Erosion Internal cycling Soil phosphates SULFUR CYCLE HYDROLOGIC CYCLE

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