Our Planet Coastal Seas DOL

Why does the coast make up 10% of the world's oceans, but 90% of the ocean's life?

• Life is superabundant

• The animals get energy from the nearby beaches and land

• sunlight causes a high primary production (photosynthesis)

• Coastal ecosystems have many apex predators

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Why is it important to protect the sea in the fight against climate change?

• Seagrasses can absorb many times more carbon dioxide than trees

• The large mass of the ocean acts as a "heat sink" that regulates temperature

• most of the oxygen we breath is produced by phytoplankton & marine plants

• All of the above

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Why are predators like sharks important to coastal ecosystems?

• They keep fishes anxious, which is good for their mental health

• They help maintain balance by eating predators of grazing fish

• Sharks eat parasites and seaweed to help keep the corals alive

• None of the above; the ecosystem is better without sharks

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Global climate change is not a big deal if it is only 1 or 2 degrees of difference. This statement is...

• True, because all animals are warm blooded and can protect themselves from the effects

• True, because climate change is actually very slow

• False, because pollution affects all sea creatures

• False, because the microscopic plants that live in coral will be expelled, resulting in coral bleaching. This kills entire coastal ecosystems

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What enables compass jellyfish to be an invasive species?

• They are not very nutritious, so they have few natural predators

• They reproduce quickly

• They can survive where ecosystems have collapsed

• All of the above