Contribution of ambient ozone to Scots pine defoliation and reduced growth in the Central European forests: A Lithuanian case study

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• 作者：Algirdas Augustaitis ; Andrzej Bytnerowicz
• 关键词：Peak ozone concentration ; Acidifying compounds ; Meteorological parameters ; Scots pine ; Basal area increment ; Defoliation
• 刊名：Environmental Pollution
• 出版年：2008
• 出版时间：October 2008
• 年：2008
• 卷：155
• 期：3
• 页码：436-445
• 全文大小：424 K

文摘

The study aimed to explore if changes in crown defoliation and stem growth of Scots pines (Pinus sylvestris L.) could be related to changes in ambient ozone (O₃) concentration in central Europe. To meet this objective the study was performed in 3 Lithuanian national parks, close to the ICP integrated monitoring stations from which data on meteorology and pollution were provided. Contribution of peak O₃ concentrations to the integrated impact of acidifying compounds and meteorological parameters on pine stem growth was found to be more significant than its contribution to the integrated impact of acidifying compounds and meteorological parameters on pine defoliation. Findings of the study provide statistical evidence that peak concentrations of ambient O₃ can have a negative impact on pine tree crown defoliation and stem growth reduction under field conditions in central and northeastern Europe where the AOT40 values for forests are commonly below their phytotoxic levels.