Tree-ring analysis for the assessment of anthropogenic changes and trends |
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Authors: | Juknys Romualdas Stravinskiene Vida Vencloviene Jone |
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Institution: | (1) Department of Environmental Sciences, Vytautas Magnus University, Kaunas, Lithuania |
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Abstract: | 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. |
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Keywords: | anthropogenic changes environmentalpollution predictive capacity tree-ring series |
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