DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 5-6/2018 str. 15 <-- 15 --> PDF |
were interpolated from logged data for both gaps. Raster maps showing spatial change of variables are shown in Figure 2. Among small seedlings, sycamore maple was the most common species in the forest stands with an abundance of 3.20 m-2, while silver fir prevailed in the gap edge areas with an abundance of 3.40 m-2. In the large forest gaps, no significant differences were found in the number of small seedlings of silver fir, common beech and sycamore maple (Table 4). With regard to the density of small seedlings, silver fir density was highest in the forest and in the small forest gap edge areas. Its density was 1.21 m-2 in the control forest stands, 0.80 m-2 in the small gap edge areas, and 0.60 m-2 in the small forest gaps. No significant differences were found in the density of different forest tree species in the area of the small forest gaps area (Table 4). A significantly larger number of small seedlings of silver fir were found in the large forest gap edge areas (3.40 m-2) than in the small forest gap edge areas (0.80 m-2). The number of small seedlings of silver fir was 1.71 m-2 within the large forest gaps, and 0.60 m-2 within the small gaps. A significantly higher number of small sycamore maple seedlings was found in the large forest gaps than in the small forest gaps (Table 5). According to Table 6, the correlation of the density of silver fir and common beech plants in the large gap was statistically significant and negative (r= -0.29). The correlation of the density of silver fir plants and air temperature and relative air humidity was significant and negative, while the correlations of the density of common beech plants with the same microclimatic elements was significant and positive. The correlation of the density of broadleaf species (common beech and sycamore maple) was significant and positive (r=0.46). In the small gap the correlation of air temperature and soil temperature was r = 0.95 for the large gap and r = 0.69 for the small gap. The correlations were significant, positive and strong. The correlation of air temperature and soil volumetric water content was significant, negative and strong, i.e., r = 0.96 for the large gap and r = 0.50 for the small gap. The |