Ecology EOC Practice Flashcard

Front

What is a pioneer species?

Back

The first organism to colonize an ecosystem, often leading to ecological succession.

Front

What is primary succession?

Back

The process of ecological change that occurs in an area where no soil exists, starting with pioneer species.

Front

What is a decomposer?

Back

Organisms that break down dead or decaying organic material, returning nutrients to the soil.

Front

Give an example of a pioneer species.

Back

Lichen is a common example of a pioneer species that can grow on bare rock.

Front

What is the role of lichen in primary succession?

Back

Lichen helps to break down rock and create soil, allowing other plants to grow.

Front

What is the correct order of primary succession?

Back

Lichen, moss, grass and annual flowers, bushes/shrubs, trees.

Front

What is secondary succession?

Back

The process of ecological change that occurs in an area where soil exists but life has been disturbed or destroyed.

Front

What is the difference between primary and secondary succession?

Back

Primary succession starts in lifeless areas without soil, while secondary succession occurs in areas with existing soil.

Front

What are decomposers?

Back

Organisms like fungi and bacteria that break down dead organic matter.

Front

Which of the following is NOT a decomposer?

Back

Leaves are not decomposers; they are organic material that decomposers break down.