1) according to this picture, when the owl eats the bird, it is considered _______
TRANSCRIPT
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1) According to this picture, when the owl eats the bird, it is considered
_______.
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2) According to this picture, when the owl eats the chipmunk, it is considered?
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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)
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Trophic Level
Autotrophs
Heterotroph - Herbivore
Heterotroph - Carnivore
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Aerobic Respiration (how organisms use energy)
C6H12O6 + 6 O2 -------- 6 CO2 + 6 H2O
Draw it out in your notes
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Demo Time!
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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.
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Fox and the Hare Story
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• 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.
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Finally, the hare falls in love and has babies.
It all takes energy….
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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?
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Biomagnification
• Toxins and poisons get more concentrated as they move up a trophic level.
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Japan Earthquake & Tsunami 2010
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