Understanding Earth's Largest Migration

What is the largest migration on Earth that occurs every night?

• Transcontinental bird flights

• Zooplankton moving underwater

• Elephants migrating in Africa

• Herds crossing the Serengeti

What is the estimated biomass involved in diel vertical migration?

• 5 billion tons

• 1 billion tons

• 10 billion tons

• 20 billion tons

Which zone do zooplankton primarily inhabit during the day?

• Mesopelagic zone

• Bathypelagic zone

• Epipelagic zone

• Abyssopelagic zone

How do researchers primarily study diel vertical migration?

• With underwater drones

• Using light-based cameras

• Through satellite imagery

• By employing sonar technology

What triggers the movement of zooplankton during diel vertical migration?

• Temperature changes

• Water currents

• Salinity levels

• Light variations

What did researchers discover about zooplankton's movement in constant darkness?

• They stopped moving

• They moved randomly

• They continued their migration

• They moved towards the light

What is the significance of studying diel vertical migration in relation to circadian rhythms?

• It provides insights into biological clocks

• It reveals the feeding habits of fish

• It shows the impact of pollution

• It helps understand ocean currents

How does diel vertical migration contribute to the ocean's carbon cycle?

• By increasing oxygen levels

• By reducing ocean acidity

• By sequestering carbon in the deep sea

• By releasing carbon into the atmosphere

What percentage of CO2 released by humans is absorbed by the ocean annually?

• 50%

• 10%

• 75%

• 25%

Why is it crucial to study and preserve diel vertical migration?

• To improve underwater navigation

• To enhance marine tourism

• To increase fish population

• To maintain ocean food webs and climate balance