1. Heating practices in slovenian households: Socio-spatial and structural drivers of energy choicesNina Škrk Dolar, Katarina Flajšman, Nike Krajnc, Špela Ščap, Matevž Triplat, 2026, original scientific article Abstract: The European Union aims to reduce its dependence on fossil fuels by increasing renewable energy use, including sustainable wood biomass. Achieving these goals requires an understanding of heating practices at both national and household levels. This study explores heating patterns in Slovenian households, focusing on wood-based fuels and the influence of socio-demographic, spatial, and structural factors on heating choices and energy consumption. Survey results indicate that firewood is the primary heating source in Slovenia, reflecting the high proportion of forest owners. When heating energy sources are grouped by category, wood fuels dominate among households with multiple heating systems, accounting for 36% of those households. Among single-system households, fossil fuels lead (31%), followed by electricity (30%). Firewood is the most common wood fuel, followed by pellets, chips, briquettes, and residues. Rural households rely heavily on wood fuels, whereas urban households prefer fossil fuels or electricity. Overall, the median wood-fuel consumption is 66.2 GJ per household per heating season. Heating patterns are strongly linked to building characteristics. Individual systems prevail in single- and two-family houses, while collective systems are typical of multi-apartment buildings. Forest owners, mainly living in rural single-family homes, source firewood from their own forests and show little willingness to change their practices. These findings underscore the need to integrate socio-spatial and structural factors into renewable energy policy. Promoting efficient biomass use, replacing outdated appliances, developing markets for small-diameter wood, and expanding modern district heating systems based on sustainably sourced wood biomass could accelerate Slovenia’s progress towards climate neutrality and support EU renewable energy and air quality objectives.
Keywords: households, biomass, wood fuel, energy sources, heating, renewable resources
Published in DiRROS: 27.02.2026; Views: 139; Downloads: 76
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2. Wood products market statement with forecastsŠpela Ščap, Nina Škrk Dolar, Darja Stare, Tomaž Remic, 2025, treatise, preliminary study, study Keywords: wood, market, forecast
Published in DiRROS: 17.02.2026; Views: 163; Downloads: 50
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4. A single-tree approach to determine climate-growth patterns of European beech and their seasonality in the species southern distribution areaRoberto Serrano-Notivoli, Jernej Jevšenak, Katarina Čufar, Nina Škrk Dolar, Angela Balzano, Jožica Gričar, Maks Merela, Klemen Novak, Peter Prislan, Martin De Luis, 2025, original scientific article Abstract: Dry and warm climate conditions in southern Europe represent clear limits for European beech (Fagus sylvatica) growth near the species southern distribution limit, but it is unclear how aridification and changes in seasonal precipitation regimes will affect these forests at the individual level. We explored climate-growth relationships and the seasonality of peak climate signals in European beech using daily climate data and a large collection of tree-ring width series from southern and southeastern Europe through Generalised Linear Mixed Models (GLMMs). In most cases we found a positive and significant influence of precipitation on tree growth, and a significant negative effect of maximum temperature. Predictions from the GLMMs revealed a positive impact of precipitation during an 88 day window from spring to early summer (mid-April to mid-July), for an average tree across our network. This critical growing time window ranged from 75 days in warmer and drier conditions, and extended up to 100 days in areas with mild temperatures and moderate summer precipitation. Maximum temperatures negatively affected trees for an average of 27 day window in summer (June-July). This period was reduced to <10 days in locations with wetter and colder summers, rising up to 45 days in sites with drier and warmer summers. The positive effect of precipitation on growth was stronger and commenced earlier in larger trees. Similarly, the negative effects of maximum temperatures were more pronounced for larger trees. The use of daily climate data and a tree-centred approach allowed for capturing critical temporal dynamics in climate-growth relationships that are often overlooked by conventional methods. These insights significantly enhance our understanding of climatic factors influencing individual beech growth at the edge of its distribution range and their seasonal variations.
Keywords: European beech, daily climatic variables, precipitation, maximum temperature, tree-ring width, range limit
Published in DiRROS: 06.06.2025; Views: 691; Downloads: 354
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5. Assessing climate-growth relationships with daily and monthly observational and gridded meteorological dataNina Škrk Dolar, Katarina Čufar, Jernej Jevšenak, 2024, original scientific article Abstract: We compared climate-growth relationships by correlating tree-ring variation with daily and monthly meteorological data obtained from the stations of the Slovenian Environment Agency (ARSO) and modelled data from the SLOCLIM database. Tree-ring width series for analyses were obtained from previously collected European beech (Fagus sylvatica) tree-ring data from 30 sites all over Slovenia. Climate-growth correlations were calculated to evaluate whether daily meteorological data exhibits stronger correlations than monthly data. We also compared the maximum correlation coefficients using meteorological station data and gridded SLOCLIM data. The analysis was conducted using the dendroTools R package, incorporating data on daily and monthly average air temperatures and precipitation sums from the period 1960–2018. Our findings revealed significantly higher maximum correlation coefficients for daily data compared to monthly data, underscoring the importance of using daily data, particularly for precipitation. However, no significant difference was observed between maximum correlation coefficients using the meteorological station and modelled data, and the difference did not change significantly with increasing altitude.
Keywords: observational data, gridded data, tree rings, correlation analysis, dendroclimatology
Published in DiRROS: 10.12.2024; Views: 804; Downloads: 464
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6. Good survival of broadleaf tree species in a four-year-old plantation in the Slovenian KarstNina Škrk Dolar, Kristjan Jarni, Robert Brus, 2022, original scientific article Abstract: Six broadleaf tree species (Celtis australis L. – Mediterranean hackberry, Quercus petraea (Matt.) Liebl. – sessile oak, Fagus sylvatica L. – European beech, Prunus avium L. – wild cherry, Juglans regia L. – Persian walnut and Acer pseudoplatanus L. – sycamore maple) were planted in 2012 in a trial in the Slovenian Karst on two sites differing in productivity to test their suitability for use in the conversion of old pine stands into ecologically more stable broadleaf forests and to investigate their possible response to the harsher growth conditions predicted in the future. The selected economically interesting tree species have higher timber quality than broadleaves which regenerate naturally (e.g., Ostrya carpinifolia, Fraxinus ornus, Quercus cerris). Measurements were taken in 2017, after four growth seasons. All planted species except Fagus sylvatica had a high survival rate. In total, 70% of all seedlings survived, which shows promising potential. The survival rate was higher at the site on flat terrain than at the site on a slope. Prunus avium was the most successful of all planted species in terms of survival rate, at 83%, and other measured parameters (height, height increment, stem diameter, vitality and quality), and Fagus sylvatica was the least successful, with a survival rate of only 20%. Celtis australis had the highest survival rate, at 87%. Acer pseudoplatanus had the largest differences in measured parameters between the more and less productive sites among all planted species. Quercus petraea showed high resistance to xeric conditions and is expected to be the most successful in conversions. All planted species except Fagus sylvatica show favourable initial potential for the future conversion of Karst pine forests.
Keywords: forest conversion, broadleaves, survival rate, seedlings quality, climate change
Published in DiRROS: 28.06.2022; Views: 3646; Downloads: 1500
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7. Pogoji za opravljanje del v gozdovihNina Škrk Dolar, Matevž Triplat, 2019, dictionary, encyclopaedia, lexicon, manual, atlas, map Keywords: izvajanje gozdarskih del, gozdarske storitve, varnost, pogoji, strokovna usposobljenost
Published in DiRROS: 07.10.2021; Views: 1865; Downloads: 654
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8. Smernice za vrednotenje izvajalcev gozdarskih storitev : strokovna ocena MojGozdarMatevž Triplat, Mirko Baša, Nina Škrk Dolar, 2019, professional monograph Abstract: V zadnjih letih beležimo izrazito povečanje števila ponudnikov del v gozdarstvu (v nadaljevanju ponudniki), kar pomeni večjo konkurenco na trgu, a hkrati terja tudi razmislek o objektivni presoji kakovosti ponudnikov. Celostnega sistema objektivne presoje kakovosti ponudnikov v Sloveniji nimamo. Pri trajnostnem gospodarjenju z gozdovi veliko število ponudnikov ne sme biti edino gonilo za povečevanje konkurenčnosti sektorja. V tujini pa tudi pri nas ima merilo najnižje cene storitev vse pogosteje opraviti z vprašanji kakovosti izvedbe del, pri čemer pa se med merila kakovosti uvrščajo tako okoljski, socialni kot tudi poslovni vidiki odnosa med naročnikom in izvajalcem del.
Keywords: gozdarstvo, gozdarske storitve, kvaliteta, smernice, elektronske knjige
Published in DiRROS: 29.07.2020; Views: 3013; Downloads: 2273
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