Evaluating spatial-temporal dynamics of net primary productivity of different forest types in northeastern China based on improved FORCCHN.

PLoS One · 2012 · PMC3492339 · PMID 23144853

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an increasing trendno p-value reported

Our results indicated an increasing trend of forest NPP over the period, which was in agreement with previous studies [6] , [14] , [20] .

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highly significantno p-value reported

They pointed out that these relationships were highly significant, and the patterns of NPP variation with stand age were similar for different forest types [39] .

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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.