Levels of Organization
Smallest level of ecological organization.
What is an organism/species?
Organisms that make their own food using sunlight.
Answer: What are producers (autotrophs)?
Animals that eat both plants and animals.
What are omnivores?
The variety of life in an ecosystem.
What is biodiversity?
The gradual change in ecosystems over time.
Answer: What is ecological succession?
A group of the same species living in the same area.
What is a population?
The rule that says only about this percentage of energy transfers to the next trophic level.
Answer: What is 10%?
A diagram that shows multiple feeding relationships in an ecosystem.
What is a food web?
Biodiversity helps ecosystems do this during environmental change.
Answer: What is remain stable / resilient?
The first organisms that grow in newly formed areas.
Answer: What are pioneer species?
Multiple populations living and interacting in the same area.
What is a community?
Energy flows in an energy pyramid from ______.
From the bottom to the top
The role of organisms like fungi and bacteria in ecosystems.
What are decomposers?
An ecosystem contains these two components.
Biotic and abiotic components
Succession that occurs after a disturbance like a wildfire.
Answer: What is secondary succession?
A system that includes both living and nonliving components interacting together.
Answer: What is an ecosystem?
Why only a small amount of energy moves to the next trophic level.
Because organisms use most energy for life processes.
If a mouse disappears from a food web, what happens to predators that eat mice?
Their population may decrease due to less food.
Living components of an ecosystem are called this.
Answer: What are biotic factors?
Succession that begins on bare rock with no soil.
Answer: What is primary succession?
Put these in order from smallest to largest:
Organism, Ecosystem, Population, Biosphere, Community.
Organism → Population → Community → Ecosystem → Biosphere
Primary consumers are also known as this type of organism.
What are herbivores?
The level in a food chain that has the most energy.
Answer: What are producers?
Nonliving parts of an ecosystem like water, soil, and sunlight.
Answer: What are abiotic factors?
As succession continues, biodiversity usually does this.
What is increase?