Ecosystem Components and Interactions

The video tutorial explores the biotic and abiotic factors in ecosystems, detailing the levels of organization from organisms to the biosphere. It explains how living and non-living components interact, forming dynamic equilibria. The concept of limiting factors is introduced, highlighting their critical role in determining the presence of specific organisms, using the Douglas fir as an example.

What is the simplest level of organization in an ecosystem?

• Organism

• Ecosystem

• Population

• Community

What defines a population in an ecosystem?

• Same species sharing a habitat

• All living and non-living components

• Interaction between predator and prey

• Different species living together

What is a community in ecological terms?

• A single living organism

• Non-living components of an environment

• All populations in an area interacting

• A group of the same species

What does an ecosystem consist of?

• Multiple species of the same organism

• Only non-living components

• Living and non-living components

• Only living organisms

What is the biosphere?

• All ecosystems on Earth

• A single ecosystem

• A community of plants and animals

• Only the oceanic ecosystems

Which of the following is considered a biotic factor?

• Temperature

• Sunlight

• Water

• A fallen leaf

What are abiotic factors?

• Only the atmospheric components

• Living components of an ecosystem

• Non-living physical and chemical components

• Components that were once living

What is dynamic equilibrium in an ecosystem?

• A single critical factor determining species

• Only the interaction of living organisms

• Constant change and balance of factors

• A stable, unchanging environment

What is a limiting factor in an ecosystem?

• A factor that is always constant

• A factor that only affects non-living components

• A factor that is least important

• A factor that determines the type of organisms

Why do Douglas firs only grow in certain areas?

• They depend on a specific predator

• They only grow in sandy soil

• They need a high annual rainfall

• They require high temperatures