最初，前寒武纪出现原始的单细胞水生藻类，除了蓝绿藻和细菌之外。

That history began with the origin of the primitive, unicellular aquatic algae of the Precambrian Eon.

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在正常水相下，河流最终流入海洋，而一旦进入海洋，磷就被藻类等水生植物吸收。

In a normal water phase, rivers eventually empty into oceans, and once in the oceans, the Phosphorus gets absorbed by water plants like algae.

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这会造成很多不健康的后果，其中最为显著的就是那依赖于寻些富营养水生存的藻类造成的沿海“死区”数量的增加。

This has a variety of unwholesome consequences, most importantly the increasing number of coastal "dead zones" caused by algal blooms feeding on fertiliser-rich run-off waters.

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