Las nutrias marinas de California salvan su hogar

What significant action have California sea otters taken?

• They have learned to communicate with humans.

• They are migrating to new areas.

• They are fixing their ocean home.

• They have started using tools.

Why is the return of sea otters important for the ocean-land interface?

• It causes an increase in ocean pollution.

• It increases the tourist attraction.

• It helps improve and heal the area.

• It leads to a decrease in fish population.

What problem was affecting Elkhorn Slough?

• Excessive plant growth due to nutrient overload.

• Overfishing by locals.

• Oil spills damaging the marine ecosystem.

• Introduction of invasive plant species.

How do sea otters contribute to controlling the crab population?

• By eating a large number of crabs.

• By building barriers to restrict crab movement.

• By teaching other animals to hunt crabs.

• By scaring the crabs away from the area.

Why do sea otters need to eat a lot?

• To maintain their thick fur.

• To stay warm due to lack of fat.

• To prepare for long migrations.

• To attract mates during the breeding season.

What was a major reason for the near extinction of sea otters?

• Climate change.

• Pollution in the ocean.

• Competition with fishermen.

• Hunting for their fur.

What positive effect do sea otters have on marshland?

• They attract more tourists.

• They improve the marshland condition.

• They create new water channels.

• They introduce new plant species.

What did scientists discover through experiments with and without sea otters?

• Crab populations increased without otters.

• Plant diversity decreased with otters.

• Marshes were healthier with otters present.

• Otters had no significant impact on the ecosystem.

What is a key lesson from the sea otters' impact on their environment?

• The importance of marine parks.

• The benefits of ocean clean-up initiatives.

• The need for human intervention in nature.

• The significance of top predators in ecosystems.

Why are sea otters considered crucial for coastal safety and health?

• They help protect homes from flooding.

• They prevent beach erosion.

• They serve as tourist attractions.

• They monitor water quality.