7.11 B: Importance of the Ocean

What is the importance of oyster reefs in coastal ecosystems?

• They provide food for marine mammals.

• They prevent coastal erosion by stabilizing the shoreline and providing habitat for various marine species.

• They are a source of pollution in coastal waters.

• They serve as a breeding ground for freshwater fish.

What is the relationship between oysters and water quality?

• Oysters improve water quality by filtering out pollutants and excess nutrients from the water.

• Oysters harm water quality by releasing toxins into the water.

• Oysters have no effect on water quality whatsoever.

• Oysters only filter out large debris and do not affect water quality.

How do oysters contribute to the economy?

• Through fisheries, tourism, and ecosystem services that support other industries.

• By providing a source of food only.

• By being a popular pet in aquariums.

• Through their use in jewelry making.

How do oyster reefs affect local fisheries?

• They provide habitat for juvenile fish, enhancing local fisheries by increasing fish populations.

• They reduce the number of fish in the area by competing for resources.

• They have no impact on local fisheries whatsoever.

• They only affect the fisheries by increasing pollution levels.

How do oyster reefs contribute to biodiversity?

• Oyster reefs create habitats that support a diverse range of marine life, enhancing overall biodiversity.

• Oyster reefs primarily serve as a food source for larger fish species.

• Oyster reefs are mainly used for recreational activities like diving and fishing.

• Oyster reefs have no significant impact on marine ecosystems.

What is coastal erosion?

• The process by which coastlines are eroded by wave action, currents, and tides.

• The formation of new land through sediment deposition.

• The movement of sand from one beach to another.

• The rise in sea levels due to climate change.

What impact does rebuilding oyster reefs have on fish populations, such as red snappers?

• It decreases the number of red snappers in the area.

• It has no effect on fish populations.

• It increases the number of red snappers old enough to reproduce, supporting the fish population.

• It only benefits other marine species, not red snappers.

What are the environmental benefits of restoring oyster reefs?

• Enhances coastal protection, improves water quality, and increases marine biodiversity.

• Decreases coastal erosion and reduces water pollution.

• Increases fish populations and decreases algae blooms.

• Improves air quality and reduces carbon emissions.

How do oysters filter water?

• By absorbing it through their skin

• By pumping it through their gills, trapping particles and improving water clarity

• By using their shells to block debris

• By releasing chemicals that purify the water

What role do oysters play in marine ecosystems?

• Oysters are a primary food source for marine mammals.

• Oysters provide habitat for other marine organisms and filter water, improving water quality.

• Oysters are known for their ability to produce pearls only.

• Oysters are harmful to marine ecosystems by consuming too much algae.