Ecosystem Roles and Food Webs

The video explains how all living things in an ecosystem are connected through food chains and food webs. It highlights the roles of producers, consumers, and decomposers, and discusses the impact of disruptions in these systems. The importance of biodiversity and the consequences of species extinction are also emphasized.

What is the primary role of plants in a food chain?

• They are primary consumers.

• They are decomposers.

• They are producers.

• They are secondary consumers.

What might happen if all shrimp in a lake were removed?

• The fish population would decrease.

• The bear population would thrive.

• The fish population would increase.

• The lake would become more biodiverse.

How do food webs differ from food chains?

• Food webs are linear sequences of organisms.

• Food webs only include producers and consumers.

• Food webs consist of multiple interconnected food chains.

• Food webs are simpler than food chains.

Which of the following is a primary consumer?

• A herbivore

• A plant

• A carnivore

• A decomposer

What is the role of decomposers in an ecosystem?

• They break down dead organisms and recycle nutrients.

• They consume primary consumers.

• They are at the top of the food chain.

• They produce energy from sunlight.

Which type of consumer eats both plants and animals?

• Carnivores

• Decomposers

• Herbivores

• Omnivores

What is a characteristic of parasites?

• They live on and use energy from other organisms.

• They produce their own food.

• They are primary producers.

• They decompose dead matter.

Why is it important to protect all species in an ecosystem?

• To increase the number of carnivores.

• To reduce the number of decomposers.

• To maintain balance and prevent environmental chaos.

• To ensure the survival of only the largest species.

What could happen if a small plant or animal becomes extinct?

• It would only affect the primary consumers.

• It would only affect the decomposers.

• It could cause a ripple effect throughout the food web.

• It would have no effect on the ecosystem.

What is a potential consequence of environmental chaos in a food web?

• Stable populations

• More food for primary consumers

• Increased biodiversity

• Unpredictable changes affecting all species