Food Webs and Food Chains

​POE- Energy Flow in Ecosystems- Food Chains vs. Food Webs

​1. Food Chain- shows how energy moves through the ecosystem when one organism eats another organism.
2. Trophic level- each organism in the food chain represents a transfer of energy
3. Food webs- all the possible energy transfers. Basically all the food chains in a community linked together
4. Ecological pyramid- a diagram that shows the amount of energy at each trophic level.

Multiple Choice

Trophic level-

• each organism in the food chain represents a transfer of energy

• some organism in the food chain represents a transfer of energy

• each organism in the food web represents a transfer of energy

Decomposers

Multiple Choice

Which of the following would best complete this food chain?

• Producer

• Consumer

• Decomposer

• Animal

Food Web

shows how diverse and interconnected an ecosystem's food sources can be

Food Web

The plants are eaten by grasshoppers and squirrels. The grasshopper is eaten by the lizard, which is then eaten by the fox. The squirrel can be eaten by a fox or a golden eagle. The squirrel can also be eaten by a snake, which is then eaten by the fox. When the fox or eagle die, they are decomposed by earthworms and bacteria.

Food Web

Food webs look at how multiple food chains interact with each other.

Food Chain

A food chain shows you how one organism eats another and transfers its energy. For example, a zebra eats grass, and the zebra is eaten by the lion. The food chain looks like this:

Food Web

For example, a red fox likes to eat rabbits and birds. A thrush, which is a type of bird, like to eat both worms and snails

Multiple Choice

A food web shows

• how diverse and interconnected an ecosystem's food sources can be

• how one organism eats another and transfers its energy.

• How a plant makes it's own food to transfer energy to the animals

Multiple Choice

A fox can eat more than one animal?

• True

• False