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Mathematical models have also revealed that food webs may be unstable, where small changes of top predators can lead to big effects throughout entire ecosystems.

数学模型也揭示了食物网可能是不稳定的，顶级肉食性动物的微小改变会对整个生态系统产生巨大影响。

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Sharks are the ocean's top predators.

鲨鱼是位于海洋食物链最顶端的捕食者。

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"We must stop the shark-finning which is resulting in the death of thirty to seventy million sharks each year because that has so upset ocean ecology by the removal of these often apex, top-level predators."

VOA: special.2011.03.15

For thousands of years, cod and other bottom-feeding fish were the top predators in the system.

ECONOMIST: Lobsters in Maine

Nigel is fanatical about raptors and Sculthorpe certainly isn't short of top predators.

BBC: Norfolk - From scrubland to wildlife haven

"In the U.S., factory trawlers are the top predators of the commercial fishing fleet, " said Gerald Leape, Greenpeace legislative director for oceans.

CNN: Greenpeace: Industrial fishing fleet should be halved