Tree-Ring Analysis For The Assessment Of Anthropogenic Changes And Trends

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• 作者：Romualdas Juknys ; Vida Stravinskiene and Jone Vencloviene
• 关键词：anthropogenic changes ; environmentalpollution ; predictive capacity ; tree ; ring series
• 刊名：Environmental Monitoring and Assessment
• 出版年：2002
• 出版时间：2002
• 年：2002
• 卷：77
• 期：1
• 页码：81-97
• 全文大小：189 KB

文摘

Investigation of Pine (Pinus sylvestris L.)annual radial increment (width of annual tree rings) was carriedout in the surroundings of one of the largest pollution sources inLithuania – Jonava Nitrogen Fertilizers Plant. The main objectiveof investigation was to analyse different sides of anthropogenictransformations of tree-ring series in the polluted environment:changes in tree growth intensity; variance changes in tree-ringseries; changes in the relations with natural external factors.Three different periods of tree reaction to the environmentalpollution were singled out – fertilization period, depressionperiod and recovery period since annual emissions were essentiallyreduced. The variance of tree-ring series has increased severaltimes in the polluted environment. Reaction of trees to the impactof climatic factors (temperature, precipitation) has changedsignificantly in the polluted environment and their sensitivity hasalso increased.