Ocean Ecosystems and Currents Concepts

The video explores the processes of upwelling and downwelling, emphasizing their roles in oceanic nutrient and oxygen distribution. Upwelling brings nutrient-rich waters to the surface, supporting marine ecosystems like kelp forests, while downwelling delivers oxygen to deeper ocean layers. The video also discusses the continuity of flow in oceans, the concept of layered oceans, and the formation of eddies and Langmuir cells, which contribute to ocean circulation and nutrient mixing.

What is the primary role of upwelling in ocean ecosystems?

• To prevent ocean currents

• To decrease salinity levels

• To deliver nutrients to surface waters

• To increase water temperature

Which coast is particularly known for upwelling due to Ekman transport?

• West coast of Europe

• East coast of Africa

• West coast of North America

• East coast of South America

What is a consequence of insufficient sea otters in kelp forest ecosystems?

• Overconsumption of kelp by urchins

• Increase in kelp growth

• Increase in fish population

• Decrease in urchin population

What is the main function of downwelling in the ocean?

• To create ocean currents

• To bring warm water to the surface

• To deliver oxygen to deeper ocean layers

• To increase salinity

How does downwelling typically occur along coastlines?

• Through increased salinity

• By winds moving from south to north

• By winds moving from north to south

• Through surface water divergence

What are Eddies in the context of ocean currents?

• Deep ocean trenches

• Small circular currents

• Surface waves

• Large ocean gyres

What is the role of Eddies in ocean circulation?

• To create large waves

• To mix and blend water

• To increase water temperature

• To decrease salinity

What are Langmuir cells?

• Surface waves

• Near-surface wind-driven circulations

• Deep ocean currents

• Large ocean gyres

How do Langmuir cells affect ocean surface waters?

• By decreasing water temperature

• By mixing and distributing nutrients

• By creating large waves

• By increasing salinity

What is the typical spacing of Langmuir cells?

• 150 to 200 meters

• 100 to 150 meters

• 50 to 100 meters

• 5 to 50 meters