Food Web

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Definition:

Food webs are feeding relationships among various organisms in an ecosystem.

Trophic Levels:

  • Each step in a food web is called a trophic level.
  • Producers make up the first trophic level.
  • Consumers include the rest of the higher trophic levels .

Producers/Consumers

  • Plants are not consumers because they are able to use light energy from the sun to produce food from carbon dioxide and water and not other organisms.
  • Animals cannot produce their own food and feed off of plants and other organisms. They're three levels of consumers.
  1. Herbivores or animals that eat only plants are known as "primary consumers."
  2. Animals that only eat other animals are called carnivores. Carnivores that eat herbivores are known as "secondary consumers"
  3. Animals and people who eat both plants and animals are called omnivores.
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Carnivore................................. Omnivore..............................Herbivore


Questions from the food web at the top of the page


When the squirrel eats the acorn from the tree in the food web at the top of the page what level consumer is the squirrel?
When the fox eats the rabbit from the food web at the top of the page what level of consumer is the fox?
Is the grass a consumer or a producer?
Are humans only carnivores or are they omnivores?

Decomposers

  • Decomposers speed up the decaying process that puts minerals back into the soil while restarting the food web cycle again with good soil for producers to grow.