1. Copyright Pearson Prentice Hall
NBpg. 40
Try to draw the images but label them and draw the structure (chain/web)
ARROWS SHOW THE FLOW OF ENERGY
owl
hawk
tree
owl
bug
fox
mouse
bird
mosquito
grasshopper
mouse
grasshopper
chipmunk
deer
grass
grass
rabbit
Copyright Pearson Prentice Hall

2. Identify the above with the picture
Just Checking:
Producers
Autotroph
Consumer
Carnivore
Herbivore
Omnivore
Flow of Energy
In your groups
Identify the above with the picture
owl
snake
fox
rabbit
mouse
frog
Grass-hopper
squirrel
Plant One
Plant Two

3. 9-25
Ecological Pyramids
Energy
Biomass
Pyramid of Numbers .. 44 45

4. NBpg. 45
Slide 1 of 3
Energy Pyramid
Only about 10% of the energy available within one trophic level is transferred to the next trophic level.
This is because organisms use much of the energy that they consume for life processes (respiration, movement, growth and development…)
which is released as HEAT

5. NBpg. 45
Slide 2 of 3
Biomass Pyramid
Represents the amount of living organic matter at each trophic level.
Typically the greatest biomass is at the base of the pyramid.
Usually expressed in terms of grams of organic matter per unit area

6. This pyramid might not have the traditional pyramid-shape.
NBpg. 45
Slide 2 of 3
Pyramid of Numbers
Shows the relative number of individual organisms at each trophic level.
This pyramid might not have the traditional pyramid-shape.
1 hawk
6 snakes
12 primary
consumers
200 producers

8. Pyramid Handout – for Friday