Dominant role of plant physiology in trend and variability of gross primary productivity in North America.

Sci Rep · 2017 · PMC5286448 · PMID 28145496

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a negative trendno p-value reported

However, other regions experienced a negative trend (−2.72 ± 2.91 g C m −2 per year) in annual GPP.

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an increasing trendno p-value reported

In equations (5) , (6) , (7) , a positive sign denotes an increasing trend of annual GPP contributed by the corresponding indicator, and vice versa, and the magnitude denotes the amount of the relative contribution.

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a positive trendno p-value reported

The majority (66.5% of the area) experienced a positive trend in annual GPP with an increasing rate of 3.47 ± 3.36 g C m −2 per year.

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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.