Aquatic Ecosystems and Organisms

The video discusses the differences between freshwater and saltwater ecosystems, highlighting the unique habitats and organisms found in each. Freshwater ecosystems, like ponds and swamps, have minimal salt and support creatures like snails and frogs. Saltwater ecosystems, such as oceans, are divided into zones like intertidal and open ocean, each hosting different organisms. The video emphasizes that saltwater fish cannot survive in freshwater environments due to these differences.

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

• They are too large.

• They need warmer temperatures.

• They require salt in their water.

• They need more space.

What is the main difference between saltwater and freshwater ecosystems?

• Temperature

• Amount of sunlight

• Size of the ecosystem

• Salt content

Which of the following is a freshwater ecosystem?

• Ocean

• Swamp

• Coral reef

• Estuary

Which of the following plants is commonly found in freshwater ecosystems?

• Coral

• Cattails

• Seaweed

• Mangroves

What type of organisms are plankton?

• Large fish

• Land animals

• Bottom dwellers

• Floating organisms

Which zone in the saltwater ecosystem is known for being the darkest and coldest?

• Intertidal zone

• Coral reef

• Open ocean upper region

• Open ocean lower region

What are benthos?

• Organisms that float on water

• Bottom dwellers

• Surface dwellers

• Flying creatures

Which of the following organisms is typically found in the intertidal zone?

• Sharks

• Eels

• Crabs

• Whales

What is the role of plankton in aquatic ecosystems?

• They provide shelter for fish.

• They produce oxygen.

• They control water temperature.

• They clean the water.

What is a common characteristic of freshwater ecosystems?

• Low salt content

• Presence of coral reefs

• High temperatures

• High salt content