Water use efficiency in a primary subtropical evergreen forest in Southwest China.

Sci Rep · 2017 · PMC5316949 · PMID 28216656

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a decreasing trendno p-value reported

Annual mean WUE exhibited a decreasing trend from 2009 to 2013, varying from ~2.28 to 2.68 g C kg H 2 O −1 .

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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.