Nutrient cycles The water cycle is unique because it is a cycle of “phase changes” ie “physical changes”. In all stages, the water molecule is basically.

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Presentation transcript:

Nutrient cycles The water cycle is unique because it is a cycle of “phase changes” ie “physical changes”. In all stages, the water molecule is basically the same molecule. Nutrient cycles are chemical cycles, so the chemical structure is changing at every stage.

1) Nitrogen cycle Many many molecules of living things require the atom Nitrogen (N) Amino acids Proteins DNA

Ammonia NH3 Ammonium = NH4 Nitrates= NO2 Nitrates = NO3 *Atmospheric Nitrogen N2 *Fertilizers = NH4(Ammonium) NO3(Nitrates)

Nitrogen Cycle O2 Diazotrophs = nitrogen fixers Nitrogen gas to ammonia or proteins Nitrobacteria = nitrite to nitrate Nitrosomonus bacteria turn ammonia into nitrite

LOTS OF ORGANIC MOLECULES WITH NITROGEN LIKE PROTEINS NH3 NO21- NO31- Ammonia NH3 Ammonium = NH4 Nitrates= NO2 Nitrates = NO3 *Atmospheric Nitrogen N2 *Fertilizers = NH4(Ammonium) NO3(Nitrates) NO21- NO31-

Ammonium = NH4 Nitrates= NO2 Nitrates = NO3 Atmospheric Nitrogen N2