Ecology Exam- The Last and FINAL Test!

Front

What percentage of energy is transferred from one trophic level to the next?

Back

10% of energy is transferred from one trophic level to the next.

Front

Where does the remaining 90% of energy go in an ecosystem?

Back

The energy is lost as heat and other metabolic processes.

Front

What is the role of producers in the carbon cycle?

Back

Producers take in carbon dioxide from the atmosphere.

Front

How do consumers interact with carbon in the carbon cycle?

Back

Consumers release carbon dioxide back into the atmosphere.

Front

What are two reasons that populations can decrease in size?

Back

Emigration and increased death rates.

Front

What is a potential negative impact of introducing a new predator to an ecosystem?

Back

The birds will consume beneficial insects, as well as the pest species.

Front

What is a pioneer species?

Back

A pioneer species is the first organism to colonize a barren environment, such as lichens on bare rock.

Front

What is the significance of lichens in an ecosystem?

Back

Lichens are pioneer species that help in soil formation and provide habitat for other organisms.

Front

Define emigration in the context of population dynamics.

Back

Emigration is the movement of individuals out of a population.

Front

Define immigration in the context of population dynamics.

Back

Immigration is the movement of individuals into a population.