Population Ecology

An ocean bay food web is pictured.

Imagine a sea otter moves to the area. The sea otter eats crabs. What would happen to the ecosystem?

• The ecosystem would stay the same

• The sea duck population will decrease (go down)

• The crab population will increase (go up)

• The sea duck population would increase (go up)

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Pictured is a food web.

Which organism is an omnivore?

• Deer

• Berries

• Black bear

• Red Fox

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Pictured is a food web.

Which organism is a producer?

• Deer

• Berries

• Black bear

• Red fox

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Pictured is a food web.

Which organism is a herbivore?

• Deer

• Berries

• Black bear

• Red fox

Pictured is a food web.

Which organism is a carnivore?

• Deer

• Berries

• Black bear

• Red fox

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Pictured is a food web.

What needs to be added to complete the cycling of matter through the ecosystem?

• Herbivores

• Producers

• Decomposers

• Consumers

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Pictured is a food web.

Which of the following animals might compete with the coyote for food?

• A deer that eats grass

• A snake that eats mice

• A tree that uses the sun to produce energy

• A bird that eats worms

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Decomposers are important in the food web because they

• Produce their own food using light from the sun

• Stop the flow of energy from one organism to another

• Break down dead organisms and recycle nutrients into the soil

• Are microscopic and other organisms eat them

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A food web is pictured.

What is the source of energy for the algae?

• Sun

• Rotifers, water fleas, and tadpoles

• Decomposers

• Algae does not need energy

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Kangaroos get their energy grass, leaves, ferns, and flowers. Kangaroos are a...

• Producer

• Herbivore

• Omnivore

• Carnivore

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