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  • Diameter growth, ingrowth and mortality models for uneven-aged forests in Slovenia [Elektronski vir] : doctoral dissertation = Modeli debelinske rasti, vrasti in mortalitete drevja v raznomernih gozdovih Slovenije : doktorska disertacija
    Trifković, Vasilije
    We developed diameter growth, recruitment (ingrowth), and mortality models for the most common tree species in Slovenian uneven-aged forests using tree, stand, site, and climatic predictors. ... Utilizing permanent sample plot data of the Slovenia Forest Service (1990–2014), we employed cubic spline regression for diameter growth models, Tobit censored regression for recruitment models, and quantile regression and stochastic frontier analysis for Reineke’s density-dependent mortality models. Binomial generalized linear mixed models were used for individual tree mortality probability models. R2 values in the diameter growth models ranged from 5% to 51%, with deciduous species generally exhibiting a lower R2 than conifers. The effect of climate change on diameter growth was studied for European beech. European beech responds asymmetrically to precipitation anomalies: growth reductions in dry periods are up to three times greater than growth increases in wet periods. Tree recruitment is highly stochastic and primarily influenced by stand conditions. The models enable the prediction of optimal and critical ranges of stand, site, and climatic factors for recruitment of the main tree species. Annual tree mortality averaged 3.26 trees ha- 1, i.e., a basal area and a growing stock reduction of ⠒0.32 m2 ha-1 and ⠒0.83 m3 ha-1, respectively. Mono-species stands had a higher maximum stand density than multi-species stands. The proportion of European beech positively correlated with an increased intercept and slope of the maximum stand density line. The models can be used for the development of a growth simulator for uneven-aged forests and forest management optimization.
    Type of material - dissertation ; adult, serious
    Publication and manufacture - Ljubljana : [V. Trifković], 2024
    Language - english
    COBISS.SI-ID - 198317059

    Link(s):

    Repository of the University of Ljubljana – RUL

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