PYRAMIDS EQ: How is energy calculated through a food chain?
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Transcript of PYRAMIDS EQ: How is energy calculated through a food chain?
PYRAMIDS
EQ: How is energy calculated through a food chain?
Ecological Pyramids Does this pyramid represent a food
chain or web?
How could this pyramid be changed to represent a food web?
Grass (10,000 kcal)
Grasshopper (1,000 kcal)
Frog (100 kcal)
Snake (10 kcal)
Hawk(1 kcal)
1
2
3
4
5
Pyramid of Energy
Tertiary consumer
Producer
Primary consumer
Heat
Heat
Heat
Heat
100%
10%
1%
0.1%
Pyramid of Energy
What do the big numbers represent?
The numbers in parenthesis represent the amount of energy present at each trophic level.
Grass (10,000 kcal)
Grasshopper (_____ kcal)
Frog (___ kcal)
Snake (___ kcal)
Hawk(__ kcal)
1
2
3
4
5
Pyramid of Energy
What happens to the energy as you go up the food chain?
Only 10% of the energy is transferred to organisms at the next trophic level
Pyramid of Energy
Tertiary consumer
Producer
Primary consumer
Heat
Heat
Heat
Heat
1000 kcal
100 kcal
10 kcal
1 kcal
Secondary consumer
Pyramid of Numbers Illustrates the relative number of
organisms at each trophic level.
Pyramid of Biomass Illustrates the total amount of living
tissue at each trophic level.
Ecological Pyramids
What is different about this pyramid?
How can the producer level be so small and support the trophic levels above it?
Pyramids of Aquatic Ecosystems
Numbers
Biomass
Energy
Phytoplankton are microscopic and weigh
very little
Pyramids of Temperate Forests
Numbers
Biomass
Energy
Trees are huge but not as numerous as many smaller
forest creatures.