6.3.1 ecosystems

where are rhizobium bacteria located

roots

where are nitrosonomas bacteria located

soil

where are nitrobacter bacteria located

soil

where are denitrifying bacteria located

soil

does oxidation or reduction take place in rhizobium

reduction

does oxidation or reduction take place in nitrosonomas

oxidation

does oxidation or reduction take place in nitrobacter

oxidation

does oxidation or reduction take place in denitrifying bacteria

oxidation

equation in rhizobium

N₂ + H⁺ → NH₃ / NH₄⁺

equation in nitrosonomas

NH₃ / NH₄⁺ → NO₂^- (nitrites)

equation in nitrobacter

NO₂^- → NO₃^- (nitrates)

equation in denitrifying bacteria

NO₃^- → N₂

ammonification

decomposers convert nitrogen-containing molecules into ammonium compounds

nitrification

ammonium compounds are converted to nitrogen containing molecules that can be used by plants

ecosystem

all the living organisms that interact with one another in a defined area, and also the physical factors present in the region (abiotic)

biotic factors

• interaction between living organisms  

  • e.g. competition 

• food 

• predation  

• disease  

abiotic factors

• light 

• temperature  

• water availability 

• oxygen availability  

• edaphic (soil) factors