Trend changes in forest productivity by contribution from climatic and non-climatic factors

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  • 森林生産性の傾向変化に寄与する気候的・非気候的要因
  • シンリン セイサンセイ ノ ケイコウ ヘンカ ニ キヨ スル キコウテキ ・ ヒキコウテキ ヨウイン

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Abstract

Changes in growth trends and die-off of forest trees due to the climate variability/change have been frequently reported, and under such situation, this review introduces the status quo and its causes, summarizing recent papers. As results, temperature and precipitation have been main factors controlling forest trees, and therefore growth of trees increased because of the temperature increase in some cases, while growth reductions were observed in other cases because of the relative increase of drought stress. Tree growth is also considered to be interactively affected by radiation as another climatic factor, and by non-climatic factors such as increases in atmospheric carbon dioxide, emission of atmospheric pollutants, biotic/abiotic disturbances and stresses. Tree growth should widely and continuously be measured hereafter because it is closely correlated both with responses to climate and with longevity in trees. Impacts of climate variability/change on Japanese forests might be unremarkable at present, but future researches could clarify the situation.

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