The Nitrogen Cycle

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The Nitrogen Cycle
NO3-
N2
NH3
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Trophic Levels
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Organism that uses sun or chemical energy to make
food
Plants, algae, some bacteria
Organism that feeds on other organisms for
nutrients and energy
All organisms except autotrophs
Organism that feeds on producers
Small fish, snails, tadpoles
Organism that feeds on other consumers
Heron, alligator, large fish, crayfish, dragonfly
Organism that feeds on both producers and other
consumers
Turtle
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