Biology

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Biology

• Do Now
• Take out homework
• Look at the ecosystem on your handout for today.
  Can you classify the organisms as producers,
  consumers, and decomposers?

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Food Webs
A diagram that represents feeding relationships
between populations in an ecosystem.
Any Surprises?
Populations can be producers, consumers, or
decomposers.
Try to put all of the organisms in the food web
shown into those 3 categories
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Its all about ENERGY!

• PRODUCERS get their energy from inorganic sources
  (like sunlight) AKA autotrophs
• CONSUMERS get their energy from ingesting other
  organisms. AKA heterotrophs
• DECOMPOSERS get their energy by breaking down the
  macromolecules of dead organisms

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Energy flowsthrough ecosystems
The arrows show the direction in which energy
flows through this ecosystem. What is the source
of energy for the entire community shown?
What do you think a secondary consumer is?
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TROPHIC LEVELS / Energy Pyramid
No transfer of energy is 100 efficient 2nd
Law of Thermodynamics
Did you know? It takes approximately 10.0 kg of
hay and grain for a cow to produce 1 kg of beef?
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Ecological Communities

• Populations in an ecosystem include PRODUCERS,
  CONSUMERS, and DECOMPOSERS.
• Energy flows through ecosystems from an inorganic
  source (usually sunlight) to all of the community
  populations.
• The more removed a population is from producers,
  the less energy is available.