Mr. Taylor

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Food Webs

• Mr. Taylor
• 7th grade Science class
• Lesson on food webs

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The Food Web

• The food web is a network of feeding
  relationships within an ecosystem or community
• The predator-prey relationship
• All starts with plants, which are the producers

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This is a food web of a pond

• Notice that the watercrest and cattails are the
  producers and directly affect the feeding habits
  of all the consumers above them.

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What is a producer?

• Producers are plants
• Plants are autotrophic, which means that they
  use the process of photosynthesis to make glucose
• Glucose is food for plants

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What is a consumer?

• The raccoon is a diverse consumer that will eat
  fish, crayfish, mice, snakes, birds, eggs,
  insects, and even honey.
• So we can define consumers as herbivores,
  carnivores, and omnivores
• The raccoon is an omnivore

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The links between the producers and the consumers

• watercress --- suckers --- trout --- raccoon
• cattails ---- suckers ---- muskrat
• cattails ---- crayfish ---- raccoon

• Certain animals will eat certain things and this
  shows the connection between the producers and
  consumers

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There are far more producers then consumers
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Herbivores

• These are animals that only eat plants
• The E. Cottontail rabbit loves to eat grasses and
  clover

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Carnivores

• These are animals that feed on other animals.
• Meat lovers
• This is the bobcat and it is a fierce predator of
  the rabbit

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Omnivores

• These animals will eat both plants and animals.
• This is a coyote
• It will eat berries and anything from mice to
  deer.

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Antarctic Ocean Food Web

• This food web shows the complexity and diversity
  of an environment. The ocean is the largest and
  most dynamic of all communities, and as you can
  see has a very complex web.

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Review
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References

• http//www.ftexploring.com/me/me2.html
• http//www.google.com
• http//www.coolantarctica.com/Antarctica20fact20
  file/wildlife/whales/food20web.htm

Hyperlink to a website !