7L17.1 Marine Ecosystem and Food Web

What is the primary role of kelp in the underwater forest near Monterey, California?

• Providing nutrients for various creatures

• Filtering water

• Producing oxygen

• Providing shelter for fish

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How do sea otters help maintain the balance in the kelp forest ecosystem?

• By keeping the sea urchin population in check

• By providing nutrients to the seafloor

• By cleaning the water

• By eating kelp

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What is a food web?

• A chart of the weather patterns

• A diagram of the water cycle

• A list of all species in an ecosystem

• A map of all the interactions in an ecosystem

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What do the connections in a food web represent?

• The transfer of energy

• The movement of air

• The flow of water

• The growth of plants

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What is the main passage of energy through an ecosystem?

• Water cycle

• Food web

• Carbon cycle

• Nitrogen cycle

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What can small changes in a marine ecosystem lead to?

• Only positive effects

• Only negative effects

• Big impacts across the entire community

• No significant impact

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What happens to sea urchin and kelp populations when sea otters are present?

• Sea urchin population increases and kelp population decreases

• Both populations become unstable

• Sea urchin population decreases and kelp population increases

• Both populations are stable

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What is the impact of removing sea otters from the ecosystem?

• No impact

• Only positive impact

• Cascading effects impacting multiple trophic levels

• Only negative impact on sea urchins

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Why are sea otters considered a keystone species?

• They are the top predators

• They are the largest species in the ecosystem

• They have a significant impact on the ecosystem's structure

• They are the primary producers

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How can understanding food webs help in conservation efforts?

• By increasing the number of species

• By predicting weather patterns

• By reducing pollution

• By identifying the most important species to protect

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