MOVEMENT BETWEEN PLANTS ANIMALS BACTERIA ATMOSPHERE SOIL

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Presentation transcript:

MOVEMENT BETWEEN PLANTS ANIMALS BACTERIA ATMOSPHERE SOIL NITROGEN CYCLE MOVEMENT BETWEEN PLANTS ANIMALS BACTERIA ATMOSPHERE SOIL

Nitrogen is required for all organisms to live and grow Nitrogen is an Essential Components of: DNA RNA Protein

NITROGEN Needed to make Chlorophyll in plants; which is used in photosynthesis to make their food and energy (6H2O + 6CO2 C6H12O6 + 6O2)

Most organisms cannot use atmospheric nitrogen NITROGEN FUNCTIONS ATMOSPHERE (AIR): N2 70% OF NITROGEN GAS Most organisms cannot use atmospheric nitrogen SOIL CONTAINS: NO3: NITRATES NO2: NITRITES NH3: AMMONIA

BACTERIA HELPS NITROGEN CHANGE STATES TO BE ABSORBED BY PLANTS For Nitrogen to be used by organisms: Bacteria is an important step that helps convert nitrogen from the air/atmosphere Needs to be converted to NH3 (Ammonia) Fungi and Bacteria decompose dead organic matter

PROCESSES OF THE NITROGEN CYCLE Nitrogen Fixation: N2 NH3 Changes nitrogen directly from the atmosphere Nitrogen fixing bacteria inhabit legume root nodules. Ex: peas, beans, and clover Natural events: lightning, forest fires, lava flows cause fixation at small level

Ammonification: Decaying Process When a plant or animals die, decomposers turn nitrogen into ammonia Ammonia reenters nitrogen cycle

Nitrogen Nitrification NH3 NO2 NO2 NO3 Ammonium gets changed into nitrates by bacteria Plants can absorb Not all plants consume NO3, they can directly use ammonia

Extra nitrogen in the soil gets put back into the atmosphere Denitrification: NO3 N2 + N2O Carried out by denitrifying bacteria Extra nitrogen in the soil gets put back into the atmosphere

Humans alter Nitrogen cycle to Nitric Acid (HNO3) Agriculture: Deforestation and break-up of soil Industry: Combustion (burning gas) Automobile Exhaust: