Interpopulation Variation of Individual Tree Response to Pollution: Evidence from Scots Pine Dendrochronological Data
Adomas Vitas
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Faculty of Nature Sciences, Centre of Environmental Research, Group of Dendroclimatology and Radiometrics,
Vytautas Magnus University, Ž.E. Žilibero 2, LT-46324 Kaunas, Lithuania
Pol. J. Environ. Stud. 2011;20(1):209–214
The results of a dendrochronological investigation carried out on Scots pine (Pinus sylvestris L.) in the vicinity of JSC ‘Achema’ are presented. We found that pines sensitive and resistant to pollution exist in the population. Trees judged to be sensitive to pollution grew much faster in the period before the pollution occurred in comparison to resistant trees (p=0.00). We found that the dominant and codominant crown classes are more common among sensitive pines, while emergent crowns are twice as common among resistant trees. However, the differences are not statistically significant. We did not find an obvious difference between morphological bark forms of pines in respect to their sensitivity to pollution. The frequency of missing rings during the strongest depression period is much higher for sensitive pines (p=0.00).