如果在一个枯竭的生态系统中鱼的增长是每年5%，而渔业捕捞量达10%的话，渔业就会崩溃。

If fish in a depleted ecosystem grow by 5% a year and the catch expands by 10% a year, the fishery will collapse.

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珊瑚礁列于世界上最丰富的生态系统之中，可以供养包括珊瑚鱼和软体动物在内的大批不同种类的海洋生物。

Coral reefs are some of the world's richest ecosystems, supporting a diverse array of Marine life, including reef fish and mollusks.

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三文鱼曾在这里大量繁殖，但由于多年的围坝、过度捕捞和生态环境的破坏，导致其数量减少。

Salmon once thrived here, but over the years DAMS, overfishing and habitat destruction have diminished their number.

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