Lesson 3: Changes in Ecosystems

Front

What is primary succession?

Back

Primary succession is the process of ecological change that occurs in an area where no soil exists, such as after a volcanic eruption or glacier retreat.

Front

What is secondary succession?

Back

Secondary succession is the process of ecological change that occurs in an area where a disturbance has destroyed an existing ecosystem but soil and some organisms still remain.

Front

What are pioneer species?

Back

Pioneer species are the first organisms to colonize an uninhabited area, helping to create soil and conditions for other species.

Front

What is a climax community?

Back

A climax community is a stable and mature ecosystem that has reached a steady state, dominated by climax species.

Front

What is eutrophication?

Back

Eutrophication is the process in which organic matter and nutrients build up in a body of water, potentially leading to excessive plant growth and oxygen depletion.

Front

How does biodiversity benefit an ecosystem?

Back

Biodiversity helps communities remain stable by providing a variety of species that can adapt to changes and support ecosystem functions.

Front

What are climax species?

Back

Climax species are the dominant species in a climax community, adapted to the local environment and capable of reproducing successfully.

Front

What role do decomposers play in an ecosystem?

Back

Decomposers break down dead organic matter, returning nutrients to the soil and supporting new plant growth.

Front

What is an ecosystem?

Back

An ecosystem is a community of living organisms interacting with their physical environment.

Front

What is the difference between biotic and abiotic factors?

Back

Biotic factors are the living components of an ecosystem, while abiotic factors are the non-living physical and chemical elements.