1) according to this picture, when the owl eats the bird, it is considered _______
TRANSCRIPT
1) According to this picture, when the owl eats the bird, it is considered
_______.
2) According to this picture, when the owl eats the chipmunk, it is considered?
Energy Flow Through Trophic Levels
Three hundred trout are needed to support one man for a year. The trout, in turn, must consume 90,000 frogs, that must consume 27 million grasshoppers that live off of 1,000 tons of grass. -- G. Tyler Miller, Jr., American Chemist (1971)
Trophic Level
Autotrophs
Heterotroph - Herbivore
Heterotroph - Carnivore
Aerobic Respiration (how organisms use energy)
C6H12O6 + 6 O2 -------- 6 CO2 + 6 H2O
Draw it out in your notes
Demo Time!
Why the 10% rule?... Where does it go?
• In the process of respiration, metabolic work is done and energy in chemical bonds are converted to heat energy.
Fox and the Hare Story
• The hare uses a significant fraction of the energy just being a hare – maintaining a high body temperature, synthesizing proteins, and hopping.
• This energy is “lost” as heat due to respiration.
Finally, the hare falls in love and has babies.
It all takes energy….
The fox has less energy available than the rabbit did. How many rabbits must the fox eat to perform the same functions as the
hare?
Biomagnification
• Toxins and poisons get more concentrated as they move up a trophic level.
Japan Earthquake & Tsunami 2010
