Chapter 20 Flashcards

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1
Q

What is a producer in an ecosystem?

A

They make their own food from carbon dioxide.

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2
Q

What is a consumer in an ecosystem?

A

They gain energy by eating other organisms.

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3
Q

What is the difference between a herbivore, a carnivore, and an omnivore?

A

Herbivores- Eat producers
Carnivores- Eat other animals
Omnivores- Eat both.

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4
Q

What is a detritivore in an ecosystem?

A

A type of decomposer that ingests matter from dead organisms or feces.

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5
Q

What is primary productivity?

A

It is the total amount of biomass produced by autotrophs (producers) in a given area per unit of time..

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6
Q

What is net primary productivity?

A

It is overall primary productivity subtracted by biomass

needed to fuel metabolic activities in photosynthetic organisms.

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7
Q

What is biomass?

A

The mass of living organisms.

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8
Q

What is trophic level?

A

It represents where an organism is on the food chain. It generally maxes out at 4 levels.
Example: trophic level 1= producer, trophic level 2= primary consumer, trophic level 3= secondary consumer, trophic level 4= tertiary consumer.

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