The transition from the "iron hypothesis" to "silica hypothesis" reflects the responds and feedbacks of the "bio-pumps", especially different marine phytoplanktons to the past climate changes.

从“铁假说”到“硅假说” ，反映了大洋“生物泵”尤其是海洋中的不同浮游植物群对过去气候变化的响应和反馈。

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"It upset our original hypothesis that this region is iron limited, " said Prof.

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Martin tested his hypothesis in Antarctica and found that phytoplankton thrived in jars of seawater infused with iron.

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