Stručni rad
Tree crown defoliation and fire risk assessment on bioindication and basic plots in the area of the Forest Administration Gospić
Damir Ugarković
orcid.org/0000-0002-5192-9974
; Sveučilište u Zagrebu, Fakultet šumarstva i drvne tehnologije, Zagreb, Hrvatska
Mandica Dasović
; Hrvatske šume d.o.o., Uprava šuma Podružnica Gospić, Gospić, Hrvatska
Mate Furlan
; Hrvatske šume d.o.o., Uprava šuma Podružnica Gospić, Šumarija Udbina, Udbina, Hrvatska
Krešimir Popić
orcid.org/0000-0002-8664-7205
; Hrvatske šume d.o.o., Uprava šuma Podružnica Vinkovci, Šumarija Lipovac, Lipovac, Hrvatska
Sažetak
Tree crown defoliation is an indicator of tree vitality and one of the parameters in assessing forest tree crown damage. The aim of this paper is to show the trends in the classes of crown defoliation and to compare the crown defoliation of silver fir, common beech and common spruce trees. In addition, the aim of the research was to show the degrees of fire danger for bioindication and basic plots where monitoring of tree crown defoliation is carried out. Data on the percentage of trees by classes of defoliation, slight defoliation (<2 5 %), moderate defoliation (> 25 %) and severe defoliation (> 60 %) from the monitoring plots (ICP Forests) in the area of the Forest Administration Gospić were analysed. For experimental plots on which crown monitoring was established, a forest fire risk assessment was performed. During the observed period, there was no clear statistically significant increasing trend in the percentage of silver fir trees in classes with moderate and severe crown defoliation. In contrast, there was a statistically significant increasing trend in the share of common beech trees in classes with moderate and severe crown defoliation. There were no statistically significant trends in Norway spruce crown defoliation. In the studied species, the highest percentage of silver fir, common beech and Norway spruce trees was in the degree of low crown deforestation. Comparing the defoliation of tree species, the highest percentage of trees in the degree of slight crown defoliation was common beech, and the lowest silver fir. In the degree of moderate crown defoliation, the highest percentage was of silver fir trees, and the lowest of common beech trees. According to the degree of fire hazard on the crown defoliation monitoring plots, there was little fire hazard. The crown defoliation of the trees of the analysed forest tree species in the investigated area is in favourable condition considering that the highest average percentage of trees had a slight crown defoliation. A higher degree of fire danger can be expected in the absence of silvicultural operations to repair the consequences of impaired health of stands and the dieback of certain species of trees in the study area.
Ključne riječi
crown defoliation; Silver fir; European beech; Norway spruce; fire, salvage logging
Hrčak ID:
261412
URI
Datum izdavanja:
28.6.2021.
Posjeta: 960 *