But a lot of fertilizer applied to cropland simply washes off and fertilizes blooms of algae instead.

但许多在农田施的化肥被冲走了，让藻类花朵抢了营养。

When currents and temperatures cause a large bloom of algae in the ocean, these bacteria also feed on dying algae.

当洋流和温度导致海洋中藻类大量繁殖时，这些细菌也会以垂死的藻类为食。

All of that organic material fueled huge blooms of algae, and then bacteria, which in turn sucked up oxygen from the ocean.

所有这些有机物质助长了藻类的大量繁殖，然后是细菌， 而细菌又从海洋中吸取氧气。