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Trophic level
The level at which an organism feeds in a food chain
Productivity
The rate of production of new biomass by producers
What turns nh4 to no2
Nitrosomonas
What turns no2 to no3
Nitrobacter
Leaching
Nitrates flow into rivers and streams
What does nitrogen fixation
Rhizobium bacteria, haber process, lightning
Where does rizobium live
Root nodules
What causes fossil fuels to form
Fossilisation of plants and animals
Climax community
The final stable community that exists after the process of succession has occurred
Deflected successiom
When succession is stopped or interfered with
Pioneer species
The species that begin the process of succession often colonising an area as the first living things there
Succession
Progressive change in a community of organisms over time
Note 
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