Aquatic Ecosystems and Their Challenges

The video explores aquatic ecosystems, dividing them into freshwater and marine types. It discusses the organisms inhabiting these ecosystems and the food webs they form. The video also highlights human impacts on aquatic ecosystems, such as pollution, climate change, and habitat destruction, emphasizing the importance of preserving these environments.

What is the primary difference between freshwater and marine ecosystems?

• The size of the water body

• The temperature of the water

• The amount of salt in the water

• The type of organisms present

Which of the following is a characteristic of a lentic freshwater ecosystem?

• Flowing water

• Saltwater

• Still water

• Brackish water

What type of marine ecosystem is characterized by a mix of freshwater and saltwater?

• Coral reefs

• Estuaries

• Mangroves

• Pelagic zones

Which organisms are considered primary producers in aquatic ecosystems?

• Birds

• Snakes

• Algae and aquatic plants

• Fish

What role do dragonfly larvae play in the aquatic food web?

• Secondary consumers

• Decomposers

• Primary consumers

• Primary producers

How can excessive use of fertilizers impact aquatic ecosystems?

• Algae blooms leading to oxygen depletion

• Increase in fish population

• Improvement in water clarity

• Decrease in water temperature

What is a potential consequence of road salt entering aquatic ecosystems?

• Increased water temperature

• Decreased salinity

• Harm to aquatic organisms

• Improved water quality

Which of the following is an example of an invasive species problem in aquatic ecosystems?

• Planting trees near water bodies

• Building artificial ponds

• Release of goldfish into local lakes

• Introduction of native plants

What is a significant effect of climate change on aquatic ecosystems?

• Decrease in water pollution

• Increased fish diversity

• Drying up of wetlands

• More frequent algae blooms

How does habitat destruction affect aquatic ecosystems?

• Increases biodiversity

• Improves water quality

• Destroys food webs and chains

• Reduces water temperature