Bio resources: Marine Productivity

A Level Environmental Science revision

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Last updated: May 31, 2025

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Hint	Answer
Limiting factors	Light
Limiting factors	Nutrients
Limiting factors restrict...	Growth of algae
Photic zone depth	100m
Tropical oceans	Low productivity all year
Tropical oceans	High light levels
Tropical oceans	High temperatures
Tropical oceans	Low nutrient levels
Tropical oceans	Autotrophs cannot grow easily

Hint	Answer
Temperature oceans	Bloom in summer
Temperature oceans	Bloom in autumn
Temperature oceans	Storms disturb sediments
Antarctic ocean nutrient source	Storms
Antarctic ocean nutrient source	Upwelling
Antarctic ocean	Rapid growth in summer
Freshwaters	High productivity all year
Freshwaters	Nutrient runoff
Freshwaters	Shallow

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