中央ヨーロッパ森林衰退の現状と研究状況
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概要
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The current status and research efforts on forest decline in Central Europe, possibly affected by deposition of atmospheric air pollutants, are reported. Information is drawn from recent review articles and the author's observation and personal communications during Excursion No. 13 of the XIV International Botanical Congress in Summer 1987. The forest decline is intensifying and spreading rapidly throughout Central Europe. In most cases, Picea abies trees at altitudes between 700-1300m show damage symptoms, such as yellowing and early loss of needles, loss of fine roots, and decreased growth, leading to premature deaths. The combination of symptoms and degree of damage to the forest trees varies greatly among sites as well as the suspected causes including soil acidification, ozon injury, and climatic stresses. An increasing number of researchers agree that multiple stress factors. both natural and anthropogenic, predispose trees to damages, Strong disagreements exist over whether or not the deposition of atmospheric pollutants(acid rain)is the common primary cause for the widespread forest decline. For an objective evaluation of different hypotheses, standardization of data collections, as well as more active exchange of opinions and research techniques among different research techniques among different research groups within and among nations is necessary.
- 日本生態学会の論文
- 1988-12-31