Influence of air pollution and extreme frost on wood cell parameters at mountain spruce stands (Picea abies (L.) karst.) in the ore mountains
The aim of the research was to evaluate the potential of wood anatomy parameters as stress indicators on base of changing cell characteristics and proportion of latewood in Picea abies stands damaged by extreme climatic conditions in combination with high air pollution load during the winter 1995/96. The research was carried out in the Ore Mountains (Czech Republic), where sites were located along the gradient of forest damage. Preliminary analyses showed the decrease of lumen width, cell wall thickness and the number of tracheid in the tree rings of spruce at heavily damaged site. Significant difference was shown between sites with different damage level. Moreover the difference in reaction dynamics of earlywood and latewood parameters was recorded. The length of stands regeneration was shown to be around 3 years depending on the assessed parameter and the damage rate.