Ecosystem Concepts and Interactions

This video tutorial provides a review of ecosystems, covering key terms and concepts such as species interactions, abiotic factors, and the role of keystone species. It explains the flow of energy through ecosystems, highlighting the importance of autotrophs and heterotrophs. The tutorial also discusses the impact of removing keystone species and the cycling of chemical elements within ecosystems.

What is the primary focus of this lesson on ecosystems?

• To introduce new concepts in biology

• To review previously learned concepts in ecosystems

• To discuss the history of environmental science

• To explore the anatomy of organisms

Which of the following best describes an ecosystem?

• A collection of non-living elements

• A group of abiotic factors

• Multiple species interacting with each other and their environment

• A single species living in isolation

What is a keystone species?

• A species with a disproportionate impact on its ecosystem

• The most abundant species in an ecosystem

• A species that is always a top predator

• A species that is always a primary producer

Which of the following is an example of a keystone species in aquatic ecosystems?

• Sea stars

• Sharks

• Dolphins

• Coral

What role do autotrophs play in an ecosystem?

• They are always at the top of the food chain

• They decompose organic matter

• They produce energy from sunlight or chemicals

• They consume other organisms for energy

How do chemoautotrophs obtain energy?

• By consuming other organisms

• Through photosynthesis

• By decomposing organic matter

• By using inorganic gases from hydrothermal vents

What is the primary difference between autotrophs and heterotrophs?

• Both rely on sunlight for energy

• Autotrophs produce their own energy, while heterotrophs rely on other organisms for energy

• Both are primary consumers

• Autotrophs rely on other organisms for energy, while heterotrophs produce their own energy

Which of the following is an example of a photoautotroph?

• Fungi decomposing organic matter

• Carnivorous animals

• Plants that perform photosynthesis

• Bacteria at the bottom of the ocean

What is the role of consumers in an ecosystem?

• They are always primary producers

• They decompose dead matter

• They consume energy from other organisms

• They produce energy from sunlight

Which of the following organisms would be considered an omnivore?

• A wolf

• A plant

• A human

• A sea star