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ŠUMARSKI LIST 11-12/2019 str. 57     <-- 57 -->        PDF

2016). The second method was the UFMO method (Ogris et al., 2013). Assessments and measurements by both methods were carried out during July and August 2013 in the same area of the Tivoli, Rožnik and Šiška Hill Landscape Park in the Municipality of Ljubljana (MOL), Slovenia (Fig. 1, Latitude 46.0514 N and Longitude 14.4779 E), by the same three forest health experts.
ISM method – ISM metoda
Thirty-two permanent forest-monitoring plots on a 250 × 250 m systematic grid were established in July 2013 in the Tivoli, Rožnik and Šiška Hill Landscape Park in Ljubljana (Padoa - Schioppa et al., 2012). From these 32 plots, only 15 plots were chosen for ISM (Fig. 1). The centroid of each plot was marked with an iron pole so that the measurements could be repeated in following years.
The measurements and assessments were performed on the 15 sampling plots in July 2013 according to the ISM monitoring protocol (Padoa - Schioppa et al., 2012; Eichhorn et al., 2016). Data on trees of different dimensions (based on a range of diameter at breast heights, DBH) were collected using concentric circles. Within the plots, trees, dead wood, and small trees were inventoried: 30 m2 plot – small trees (DBH < 10 cm); 200 m2 plot – standing trees and dead wood (DBH ≥ 10 cm & < 30 cm); 600 m2 plot – standing trees (DBH ≥ 30 cm); 2,000 m2 plot – dead wood (DBH ≥ 30 cm), site and stand characteristics. On the plot level the following attributes were recorded (14): GPS location, type of relief, exposition, stoniness, rockiness, slope, type of forest, developmental stage of the stand, canopy closure, regeneration, naturalness, homogeneity of the stand, forest management, forest characteristics, and age of dominant trees. The following attributes of standing live trees were gathered (5): tree species, tree location (distance and azimuth), status of the tree, diameter at breast height, and social class. Dead wood on the plot was described with following attributes (6): type of dead biomass, tree species, DBH, length, height, and decay class. Additional attributes were gathered for small trees with a DBH of less than 10 cm (6): tree species, DBH, height, origin class, damage class, and other tree species present. Tree condition on the plot was described with the following variables (11): percentage of defoliation, affected part of the tree, specification of the affected part, location in the crown, symptom, symptom specification, causal agents, age of damage, damage extent on the trunk (% and area class in dm2), and management measure suggested. Each tree could have several damaging agents. Furthermore, the time needed for the plot inventory was recorded.
UFMO method – UFMO metoda
Each UFMO plot was represented by a footpath, i.e. a non-linear transect. The transect was recorded by a GPS track.