海獭的减少会使海胆的数量增加，因为海獭以此为食，从而增加海胆对海藻林的食草压力。
Fewer otters would have allowed sea urchin populations on which the otters preyed to expand and the urchins' grazing pressure on kelp forests to increase.
并且破坏阿拉斯加啊西南部的海藻林生态系统。
And they've destroyed the kelp forests, and with it, the kelp forest ecosystem in southwestern Alaska.
地球上伟大的氧气制造者是海草林和居住在海洋里的海藻，不是雨林，尽管它们也对制造氧气有所贡献。
The great oxygenators of the Earth are the kelp forests and the algae that live in the oceans.
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