Ecology Review

Front

What percentage of energy decreases as it moves up the energy pyramid?

Back

10%.

Front

Which organism can be classified into more than one trophic level according to the food web?

Back

Owl.

Front

What happens to grasshoppers if frogs become extinct?

Back

The grasshoppers will increase.

Front

What principle states that two species cannot coexist if they compete for the same resources?

Back

Competitive Exclusion Principle.

Front

What type of succession occurs on previously uninhabited land?

Back

Primary succession.

Front

Define 'trophic level'.

Back

A trophic level is a position in a food chain or food web, representing the flow of energy and nutrients.

Front

What is the role of producers in an ecosystem?

Back

Producers convert solar energy into chemical energy through photosynthesis.

Front

Explain the term 'food web'.

Back

A food web is a complex network of feeding relationships among organisms in an ecosystem.

Front

What is the difference between primary and secondary succession?

Back

Primary succession occurs on bare rock, while secondary succession occurs in areas where a disturbance has destroyed an existing community.

Front

What is a keystone species?

Back

A keystone species is one that has a disproportionately large effect on its environment relative to its abundance.