Aquatic Ecosystems and Organisms

The video tutorial explains the differences between freshwater and saltwater ecosystems, focusing on the habitats and organisms that thrive in each. Freshwater ecosystems, like ponds and swamps, have low salt content and host creatures like snails and frogs. Saltwater ecosystems, such as oceans, are divided into zones like intertidal and deep ocean, each with unique organisms. The video highlights that saltwater fish cannot survive in freshwater habitats due to differing environmental needs.

Why can't saltwater fish live in a freshwater tank?

• They require more oxygen.

• They need salt to survive.

• They eat different food.

• They are too large for the tank.

What is a habitat in the context of aquatic ecosystems?

• A water filtration system.

• A type of fish food.

• A natural environment where organisms live.

• A place where fish are fed.

What is the main difference between saltwater and freshwater ecosystems?

• The salt content.

• The amount of sunlight.

• The size of the fish.

• The presence of plants.

Which of the following is a freshwater ecosystem?

• Swamp

• Tidal pool

• Ocean

• Coral reef

Which organisms are commonly found in freshwater ecosystems?

• Coral and seaweed

• Crabs and barnacles

• Snails and frogs

• Dolphins and whales

What is the intertidal zone?

• A type of fish.

• A freshwater lake.

• Where the tide comes in and out.

• The deepest part of the ocean.

Which organisms are considered benthos?

• Plankton

• Turtles and whales

• Necton

• Eels and shrimp

What is the role of plankton in aquatic ecosystems?

• They are predators.

• They provide shelter.

• They make oxygen.

• They clean the water.

What is a characteristic of the open ocean lower region?

• It is full of coral reefs.

• It is the shallowest zone.

• It is dark and cold.

• It is warm and sunny.

What is a key takeaway about aquatic ecosystems?

• All fish can live in any type of water.

• Saltwater and freshwater ecosystems have unique habitats.

• Freshwater ecosystems are saltier than saltwater ecosystems.

• There is no difference between saltwater and freshwater ecosystems.