Download SNC 1D/P Ecological Pyramids food chains: only indicate the n

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Transcript
SNC 1D/P
Ecological Pyramids
food chains: only indicate the number of trophic levels (energy transfers), not how much energy is available
ex.
grass
grasshopper
mole
 ecologists prefer to study ecological pyramids
owl
3 types
1. pyramid of numbers: the area of each rectangle represents the ___________________________________
that trophic level
tree
grasshopper
mole
owl
tree
grasshopper
mole
owl
fleas
advantage:
disadvantage:
2. pyramid of biomass: the area of each rectangle represents the ________________________________
at that trophic level
advantage:
disadvantage:
3. pyramids of energy: the area of each rectangle represents the ________________________________
at that trophic level
advantage:
disadvantage: