A Microscopic Meal of Algae and Krill
In A Microscopic Meal of Algae and Krill, narrator Sir David Attenborough describes how, as the ice melts in Antarctica, the Southern Ocean becomes a robust feeding ground. Tiny krill fill the ocean, creating the perfect food source for crabeater seals which are ready to dive in and dine. This video is excerpted from BBC’s Frozen Planet, a series that shows a fragile world of beauty and hostility, where nature finds a way to survive and thrive in frigid conditions.
Lesson Express
Q: How do krill feed on algae?
A: The krill collect the algae in a sieve-like basket formed by hairs on their legs.
Q: What did you learn about the Antarctic food web?
A: Students may talk about how algae and krill are very numerous, but also small. Students may mention how seals rely on tiny, microscopic animals to survive.
Q: How does the coastline of Antarctica change in the summer?
A: The ice melts and rocks and mountains are revealed.
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