Influence of forest management regimes on forest dynamics in the upstream region of the Hun River in northeastern China.

PLoS One · 2012 · PMC3377592 · PMID 22723930

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a decreasing trendno p-value reported

olgensis showed a decreasing trend and this species eventually disappeared in this region, because it is shade-intolerant and its establishment ability is low.

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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.