Synthesize Their Understanding of Change Over Time in Ecosystems

What is the effect of long-term changes on ecosystems?

• Light intensity, temperature and humidity.

• Daily changes to the abiotic conditions in an ecosystem.

• A process that describes the gradual change in the mix of species in an ecosystem.

• Introduction of a new species, natural disaster or human activity.

Tags

NGSS.MS-LS2-4

What type of area does primary succession occur in?

• A collection of the remains of dead autotrophs and particles of rock.

• A process that describes the gradual change in the mix of species in an ecosystem.

• A virtually lifeless area that lacks soil.

• A soil containing large amounts of organic material and is more suitable for the growth of plants.

What is the primary driver of ecological succession in an ecosystem?

• Climate change

• Introduction of invasive species

• Natural disasters

• All of the above

Which of the following best describes secondary succession?

• Development of a new ecosystem in a barren area

• Reestablishment of a damaged ecosystem where soil remains

• Gradual change in species composition over time

• Introduction of new species into an ecosystem

In an ecosystem, what role do pioneer species play during succession?

• They are the final species to colonize an area

• They modify the environment, making it suitable for other species

• They are the dominant species in a mature ecosystem

• They prevent other species from colonizing the area

Tags

NGSS.MS-LS2-1

How does biodiversity typically change during the process of succession?

• It decreases as the ecosystem matures

• It remains constant throughout the process

• It increases as new species colonize the area

• It fluctuates randomly without a clear pattern

What is a climax community in the context of ecological succession?

• A community that is constantly changing

• A stable community that marks the end of succession

• A community dominated by pioneer species

• A community with low biodiversity

Which of the following is an example of a disturbance that can lead to secondary succession?

• Volcanic eruption

• Glacial retreat

• Forest fire

• Formation of a new island

What is the role of decomposers in an ecosystem undergoing succession?

• They produce energy through photosynthesis

• They break down organic matter, returning nutrients to the soil

• They compete with pioneer species for resources

• They are the first organisms to colonize a barren area

Tags

NGSS.MS-LS2-3

How do abiotic factors influence the process of succession in an ecosystem?

• They have no impact on succession

• They determine the types of species that can survive

• They only affect the climax community

• They are only important during primary succession

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-3