Marine Ecosystem Concepts and Organisms

The video tutorial covers the diversity within the marine biome, starting with an introduction to the major oceans and Earth's water composition. It then classifies marine organisms into four main groups: plankton, necton, benthos, and decomposers. The characteristics and roles of each group are discussed, highlighting the importance of plankton in the marine food chain, the swimming abilities of necton, and the role of benthos and decomposers in nutrient recycling.

Which ocean is the largest in the world?

• Atlantic Ocean

• Indian Ocean

• Arctic Ocean

• Pacific Ocean

What percentage of Earth's water is saltwater?

• 70%

• 97%

• 3%

• 50%

What is the main characteristic of plankton?

• They live on land

• They are large predators

• They are microscopic

• They are fast swimmers

What type of plankton are known as producers?

• Phytoplankton

• Zooplankton

• Benthos

• Nekton

Which of the following is a characteristic of nekton?

• They live on the ocean floor

• They are swimmers

• They are stationary

• They drift with currents

Which of these is an example of nekton?

• Crab

• Fish

• Coral

• Seaweed

What is the primary habitat of benthos?

• Coral reefs

• Surface waters

• Ocean floor

• Open ocean

Which organisms are known for recycling nutrients back to Earth?

• Plankton

• Decomposers

• Nekton

• Producers

What is the role of decomposers in the marine ecosystem?

• They produce oxygen

• They recycle nutrients

• They consume plankton

• They swim in the ocean

Which of the following is NOT a characteristic of benthos?

• They are bottom dwellers

• They include crabs and lobsters

• They are drifters

• They live on the ocean floor