Such algal blooms are not only harmful to people and animals but can also trigger dead zones in the lake-areas in the water so devoid of oxygen that they cannot support aerobic life.

这种水藻大爆发不仅会对人畜造成危害还会在湖水中制造死亡区域——水中的一片区域会因为氧气匮乏而完全不能供有氧生物生存。

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Dead zones form when big blooms of phytoplankton at the surface trigger large quantities of organic matter, which then sink to the bottom.

当水面上大量爆发的浮游植物触发产生大量的有机物质，而这些有机物质随后下沉到水底的时候，死亡带就形成了。

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