极地食物链

理解极地食物链：在南极，浮游植物被磷虾吃掉，磷虾被鱼和企鹅吃掉，企鹅被豹海豹和虎鲸吃掉；在北极，冰下的藻类被浮游动物吃掉，浮游动物被鱼吃掉，鱼被海豹吃掉，海豹被北极熊吃掉；还要明白，磷虾和浮游生物等微小生物是极地所有生命的基础。

Understand polar food chains — in the Antarctic, phytoplankton are eaten by krill, krill are eaten by fish and penguins, and penguins are eaten by leopard seals and orcas; in the Arctic, algae under ice feeds zooplankton, which feeds fish, which feeds seals, which feeds polar bears — and that tiny organisms like krill and plankton are the foundation of all polar life

学习证据 / Evidence

• 构建一条南极食物链：浮游植物→磷虾→企鹅→豹海豹或虎鲸
• 构建一条北极食物链：藻类→浮游动物→鱼→海豹→北极熊
• 解释为什么磷虾和浮游生物至关重要——没有它们，整条食物链就会崩溃

• Construct an Antarctic food chain: phytoplankton → krill → penguin → leopard seal or orca
• Construct an Arctic food chain: algae → zooplankton → fish → seal → polar bear
• Explain why krill and plankton are critical — without them, the entire food chain collapses

评估问题 / Assessment

{{name}}能说明一条极地食物链吗——从微小的浮游生物开始，经过磷虾和鱼，一直到海豹、北极熊或虎鲸——并解释为什么位于最底层的微小生物如此重要？

Can {{name}} explain a polar food chain — starting from tiny plankton, through krill and fish, up to seals and polar bears or orcas — and explain why the tiny creatures at the bottom are so important?