Freshwater Ecosystems and Food Webs

The video tutorial covers the ecology of freshwater and estuary ecosystems, focusing on their types, abiotic factors, and examples. It explains the ecological relationships within these ecosystems, including producers, consumers, and food webs. The tutorial also highlights the unique characteristics of estuaries and the abiotic factors affecting them.

What percentage of the Earth's surface is covered by freshwater ecosystems?

• 1%

• 20%

• 5%

• 10%

Which of the following is NOT a type of freshwater ecosystem?

• Pond

• Lake

• Ocean

• Stream

What is a key characteristic of wetlands?

• They are always dry.

• They have changing water levels.

• They have no biodiversity.

• They are found only in deserts.

Which abiotic factor is NOT typically associated with freshwater ecosystems?

• Temperature

• Water depth

• Salt concentration

• Light levels

What is an estuary?

• A desert oasis

• A mountain stream

• A river flowing into an ocean

• A type of lake

Which of the following is a major estuary system in the United States?

• Amazon River

• Chesapeake Bay

• Nile Delta

• Great Lakes

In a food web, what does an arrow pointing to an organism indicate?

• The organism is a producer.

• The organism is being eaten.

• The organism is a parasite.

• The organism is a decomposer.

Which organism is considered a producer in a freshwater food web?

• Trout

• Algae

• Dragonfly

• Grizzly bear

What role does a flatworm play in a freshwater ecosystem?

• Decomposer

• Parasite

• Consumer

• Producer

Which of the following is a characteristic of a carnivore in a food web?

• It is a type of decomposer.

• It only eats plants.

• It is always a producer.

• It hunts and eats other animals.