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📘 How an upwelling zone feeds fish

Trace wind-driven divergence, nutrient-rich deep water, phytoplankton blooms, and marine food webs.

lessons

~10 min

to learn

🔬 Science

subject

Adults

level

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What you’ll learn

Coastal wind
Cold water
Nutrients
Phytoplankton
Fisheries
Equatorial upwelling
Relaxation
Oxygen and carbon
Climate variability
Observations

Questions this course answers

What causes coastal upwelling?

Wind-driven divergence requires replacement from below.

Why is upwelled water nutrient-rich?

Sinking organic matter is remineralized below the sunlit zone.

What starts the marine food web?

Phytoplankton convert light and nutrients into organic matter.

Why can calm periods follow productive upwelling?

Relaxation can let a bloom develop before dispersal.

What else can upwelled water carry?

Deep respiration changes oxygen and carbon chemistry.

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