Diurnal changes in seawater carbonate chemistry speciation at increasing atmospheric carbon dioxide.

Mar Biol · 2013 · PMC3873061 · PMID 24391286

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a significant trendno p-value reported

When normalizing carbon uptake to phytoplankton biomass, a significant trend of higher rates toward elevated CO 2 is also evident in this study.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.