它们取代了其他微小生物，并成为了主要海洋食物链的食物来源。
They replaced other minute organisms as a food source in the major marine food chain.
珊瑚礁是海洋食物链基础的一部分。
Coral reefs are part of the foundation of the ocean food chain.
鲨鱼是位于海洋食物链最顶端的捕食者。
浮游生物处于海洋食物链的最底层。
因此，它的消失将对整个海洋食物链产生重大影响。
Its disappearance would therefore have a major impact on the entire Marine food chain.
像人类一样，鲸鱼也是处于海洋食物链的顶端。
Like humans, they stand at the top of the Marine food chain.
像人类一样，鲸鱼也是处于海洋食物链的顶端。
Like humans, they stand at the top of the Marine food chain.
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