In Obramec and Risov ţleb forest reserves the dynamics and damage of the stands caused by the ice storm in 2014 were examined. We analysed the data obtained from measurement of sampling plots. In addition, we used lidar data from 2009 and 2014, which show the stand structure before and after the ice storm. In both reserves the prevalent tree species is silver fir. Its share is higher by 12 % in Risov ţleb, amounting to 48 % in total. It is followed by beech, Norway spruce, and other species. The growing stock in Obramec reserve is 517,2 m3/ha and 12,3 m3/ha less in Risov ţleb. The number of trees per hectare is 416 in Obramec and 34 less in Risov ţleb. On average, the share of damaged trees is 43 % in Obramec and 40 % in Risov ţleb. The least damaged tree is silver fir and the most damaged one beech. The most common damage of trees in both reserves was a broken tree top, prevalent in the upper part of the crown. The broken individual branches amounted to a maximum of 25 % loss of crown volume. The damage of the reserves and managed forest was similar, but lower in forest reserves. In both reserves small gaps ranging from 10 to 50 m2 are predominant. The share of gaps with an area greater than 100 m2 is only 3,5 % in Obramec and 11,4 % in Risov ţleb. The total area of gaps is 9 % in Obramec and 16 % in Risov ţleb. Due to the ice storm, the area of new formed gaps has increased for 5,2 % in Obramec and 10,2 % in Risov ţleb.
|