FOOD%20CHAINS%20AND%20WEBS!

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FOOD CHAINS AND WEBS!
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What is a Food Chain?

• A food chain is the path by which energy passes
  from one living thing to another.

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Producers (Autotrophs)

• Prodcers make their own food using PHOTOSYNTHESIS

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Consumers (Heterotrophs)

• Consumers hunt, gather, and store food because
  they cannot make their own.

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Four Types of Consumers

• Herbivores (plant eaters)
• Rabbits, squirrels, some birds, most insects
• Carnivores (Meat eaters)
• Wolves, predatory cats, hawks, eagles
• Omnivores (both plants and meat)
• Humans, bears
• Scavengers (eat dead things)
• Vultures

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Decomposers

• Microorganisms that are able to break down large
  molecules into smaller parts
• Decomposers return the nutrients that are in a
  living thing to the soil
• Examples

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Terrestrial Food Chain
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Aquatic food chain
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What is a Food Web?

• A more realistic way of looking at the
  relationship of plants and animals in an
  environment
• Several food chains linked together

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http//www.mrpdarling.com/wp-content/uploads/2012/
09/BorealForestFoodWebPic.jpg
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Food Webs

• How many food chains can you make from this food
  web?

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1. Which organisms are the producers? ____________
_____ _________________
2. Identify the consumers...C CarnivoreO
OmnivoreH HerbivoreP - Planktivore
Food Web Graphic - http//staff.harrisonburg.k12.v
a.us/gharper/bay/weboflifepage/foodweb.jpg
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What would happen if the mussels were to die out
due to a disease?
How would the zooplankton be affected if the fish
population were to increase?
How would the whelk population be affected if
crabs were removed?
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