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Topola
2021, broj 207, str. 21-34

Izvorni naučni rad
DOI: https://doi.org/10.5937/topola2101021M
UDK: 582.623:630(497.11)

A comparison of the accuracy of different types of samples for spatial structure indices determination in beech forests in Serbia


Bratislav Matović 1*, Dejan B. Stojanović 1, Stefan Stjepanović 2, Marko Gutalj 2, Boban Miletić 2


1 University of Novi Sad, Institute of Lowland Forestry and Environment, Novi Sad, Serbia
2 University of East Sarajevo, Faculty of Agriculture, Istočno Sarajevo, Republic of Srpska, Bosnia and Herzegovina

Autor za korespodenciju:
Bratislav Matović, E-mail: bratislav.matovic@uns.ac.rs


Izvod

In this paper we compared the accuracy of different samples (minus the sample with the NN1 edge correction and buffer zone, plus sample and modified cluster sample) to determine indices of spatial structure in beech forests in Serbia, which can be used in regular forest inventory. The research was conducted in 11 forest stands of different structure at the territory of Central Serbia. Field data used for the assessment of spatial structure indices were collected across the examined stands on the sample plots of different sizes, using systematic grid, with the square layout ofsample plots (100x100 meters). The study was conducted on 242 sample plots. For accuracy comparison of different sample types, five indices were used: Uniform angle index, Mean directional index, Species mingling index, DBH differentiation and DBH dominance indices. One-way ANOVA showed that at the stand level there were no statistically significant differences between mean values of indices obtained by different sample types. However, Simple linear correlations confirmed for most indices that if the spatial structure is to be determined with accuracy at the level of sample plots (in this case, a circular fixed radius plot of 5 acres) it is necessary to use a plus sample during data collection. For species mingling and DBH differentiation indices, Simple linear correlations show that both minus sampling with edge correction buffer zone and modified cluster sampling with somewhat less accuracy can be used to a certain extent. Minus sampling with NN1 edge correction is not practical for use on sample plots of this size in beech forests in Serbia.


Ključne reči: spatial structure, minus sample, plus sample, modified cluster sample, European beech, Serbia

Nazad na vrh

Univerzitet u Novom Sadu
Institut za nizijsko šumarstvo i životnu sredinu
Antona Čehova 13d
21000 Novi Sad
Republika Srbija
Tel: 021 540 383
E-mail: ilfe@uns.ac.rs
www.ilfe.org