Plankton and Marine Ecosystems

The video explores the critical role of plankton in marine ecosystems and the atmosphere. It defines plankton and nekton, differentiating between them. The video covers the types of plankton, including zooplankton and phytoplankton, and their roles in the marine food web. It delves into the characteristics of phytoplankton like diatoms and dinoflagellates, and zooplankton such as copepods and krill. The video also discusses plankton distribution, vertical migration, and collection methods, emphasizing their importance in marine ecology.

What is the primary role of plankton in marine ecosystems?

• To regulate ocean temperatures

• To clean the ocean floor

• To form the base of the marine food web

• To provide shelter for marine animals

How do nekton differ from plankton?

• Nekton are larger than plankton

• Nekton can swim against currents, unlike plankton

• Nekton are only found in freshwater

• Nekton are a type of phytoplankton

Which of the following is a characteristic of phytoplankton?

• They are carnivorous

• They perform photosynthesis

• They are only found in deep ocean waters

• They are primary consumers

What is a unique feature of diatoms among phytoplankton?

• They have whip-like flagella

• They have siliceous skeletons

• They are exclusively found in freshwater

• They are bioluminescent

What role do zooplankton play in the marine food web?

• They are top predators

• They decompose organic matter

• They link phytoplankton to higher trophic levels

• They are primary producers

Which of the following is true about copepods?

• They are found only in polar regions

• They are exclusively herbivorous

• They are small crustaceans that dominate net plankton

• They are a type of phytoplankton

What distinguishes meroplankton from holoplankton?

• Meroplankton are a type of phytoplankton

• Meroplankton are found only in coastal areas

• Meroplankton are larger than holoplankton

• Meroplankton are planktonic for only part of their life cycle

What limits the distribution of plankton in the ocean?

• Temperature

• Salinity

• Ocean depth

• Availability of nutrients

What is the purpose of vertical migration in zooplankton?

• To avoid predators during the day

• To find warmer waters

• To reach breeding grounds

• To escape from ocean currents

How do plankton contribute to the diet of large marine animals like whales?

• Plankton are high in fat content

• Plankton are consumed in large quantities

• Plankton are rich in minerals

• Plankton are easy to catch