Along with nitrogen and iron, phosphorous is a key limitingnutrient in the ocean.
磷和氮、铁都是海洋有限的重要营养元素。
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Phosphorus is the first limitingnutrient density to the algae populations, and therefore control the eutrophication, may depend on the phosphorus control measures.
In some places, though, iron is the limitingnutrient. Adding iron to such places should cause a bloom of planktonic algae, thus sucking carbon dioxide out of the atmosphere.