Ecological Relationships and Impacts

This video covers AP Biology Unit 8, focusing on ecology. It explains ecological organization levels, food chains, trophic levels, and energy pyramids. The video also discusses keystone and invasive species, highlighting their impact on ecosystems. Key concepts include the 10% energy transfer rule and the roles of producers, consumers, and decomposers in food webs.

What is the primary focus of ecology?

• The study of non-living factors

• The classification of species

• The study of individual organisms

• The study of relationships between living things and their environment

Which level of ecological organization includes all living species in a given area?

• Biosphere

• Ecosystem

• Community

• Population

What role do producers play in a food chain?

• They decompose organic matter

• They capture energy from sunlight or chemicals to make their own food

• They consume other organisms for energy

• They are at the top of the food chain

What is the 10% rule in ecological pyramids?

• 10% of biomass is lost at each level

• 10% of species are keystone species

• 10% of energy is transferred to the next trophic level

• 10% of organisms survive each trophic level

What is a keystone species?

• A species that is the most abundant in an ecosystem

• A species that is not native to an ecosystem

• A species that, when removed, causes significant changes in the ecosystem

• A species that is at the top of the food chain

What is a trophic cascade?

• The process of decomposition

• The introduction of an invasive species

• The flow of energy through a food chain

• A series of changes in an ecosystem caused by the removal of a keystone species

What defines an invasive species?

• A species that is a keystone species

• A species that is native to an ecosystem

• A species that is at the bottom of the food chain

• A species that causes harm to an ecosystem it is not native to

How do lionfish impact their new ecosystems?

• They outcompete native species for resources

• They help control algae growth

• They provide food for native predators

• They increase biodiversity

What happens to coral reefs when algae overgrows due to lack of fish?

• They thrive and grow larger

• They become keystone species

• They receive more sunlight

• They die due to lack of sunlight

What is the potential consequence of removing a keystone species from an ecosystem?

• Stabilization of the ecosystem

• Ecosystem collapse

• Increased biodiversity

• Introduction of new species