Marine Ecosystem Concepts and Processes

The video tutorial covers the differences between the benthic and pelagic zones, the role of phytoplankton in ocean ecology, and the process of upwelling. It explains how phytoplankton contribute to oxygen production and form the base of the ocean food web. The tutorial also describes upwelling as a process where cold, nutrient-rich water rises to the surface, supporting marine life along the California coast.

What are the two main zones of the ocean discussed in the lesson?

• Benthic and Pelagic

• Tidal and Abyssal

• Neritic and Oceanic

• Littoral and Sublittoral

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

• Tuna

• Dolphin

• Crab

• Sea Turtle

Which zone do dolphins primarily inhabit?

• Intertidal

• Abyssal

• Pelagic

• Benthic

What percentage of the Earth's oxygen is produced by the ocean?

• 90%

• 25%

• 50%

• 75%

Phytoplankton are crucial to the ocean's ecosystem because they:

• Live in the deep sea

• Are large predators

• Produce oxygen through photosynthesis

• Consume large fish

What is the primary role of zooplankton in the ocean food web?

• They produce oxygen

• They eat phytoplankton

• They are top predators

• They decompose organic matter

Which factor is NOT necessary for photosynthesis in phytoplankton?

• Sunlight

• Carbon Dioxide

• Oxygen

• Water

What is upwelling?

• A phenomenon where water evaporates quickly

• A circulation where deep cold water replaces warm surface water

• A process where warm water rises to the surface

• A tidal wave formation

Why is upwelling important for marine life along the California coast?

• It increases water temperature

• It brings nutrients to the surface

• It decreases salinity

• It causes tidal waves

What should students do to prepare for the test according to the lesson?

• Study their notes

• Read a textbook

• Visit a tide pool

• Watch more videos