CCE6 Ecological Succession: Change is Good - Crash Course Ecolog

What is the main topic of the video 'Ecological Succession: Change is Good'?

• The role of animals in primary succession

• The history of the Permian-Triassic Extinction Event

• How ecological communities change over time

• The life cycle of gymnosperms

What is primary succession?

• When plants grow in a garden

• When animals migrate to a new habitat

• When a forest regrows after a fire

• When organisms populate an area for the first time

Which type of plants are often the first to colonize a lifeless area?

• Prokaryotes or protists

• Gymnosperms

• Angiosperms

• Ferns

What is the main advantage of desolate wastelands for pioneer species?

• No competition

• Abundant water

• Rich soil

• High biodiversity

What is secondary succession?

• The final stage of ecological succession

• The colonization of a new area by pioneer species

• The process of soil formation

• The first response after a smaller disturbance

What is the climax community model?

• A community that remains stable until the next big disturbance

• A community that changes constantly

• A community that forms after primary succession

• A community with low biodiversity

What does the term 'stochasticity' refer to?

• Predictable changes in ecosystems

• The final stage of succession

• The process of soil formation

• Randomness in ecological succession

What is the Intermediate Disturbance Hypothesis?

• Small disturbances have the greatest effect on ecosystems

• Moderate disturbances are ideal for biodiversity

• Large disturbances are best for ecosystems

• No disturbances lead to high biodiversity

Tags

NGSS.MS-LS2-5

What is the outcome of primary succession?

• Immediate plant growth

• Formation of a climax community

• Building or rebuilding soils

• High animal biodiversity

What is the main cause of the Yellowstone fire in 1988?

• A single lightning strike

• A volcanic eruption

• Human activity

• A flood