Zoran Govedar

University of Banja Luka · Faculty of Forestry

Environmental pollution is a big problem for all countries of the world, especially developing countries. Pollution is very present in our country and manifests itself through air, water and soil pollution, but also the increased presence of noise, ionizing and non-ionizing radiation in the environment. Environmental protection is an area of great...

1 Environmental protection between pollution, protection and legislation 1 Predrag Ilić, Zoran Govedar, Vojislav Trkulja 2 Water quality and protection 43 Ljiljana Stojanović Bjelić, Dragana Nešković Markić, Predrag Ilić 3 Protection of small natural springs with drinking water in Republic of Serbia and Republic of Srpska 69 Sanja Mrazovac Kurilić...

Widespread and frequent droughts have affected most parts of Europe over recent years, but it remains unclear when this synchronous drying trend began and how it has been influenced by anthropogenic forcing. Here we reconstruct and explore the history of drought in southern Europe over the past 300 years using an annual record of tree-ring oxygen i...

Modern research in the forestry industry is increasingly focused on digitalization and remote sensingEarth. One of the promising areas is the formation of a digital terrain model and its subsequent study. In this regard, the purpose of the work is to identify relationships and establish dependencies between the parameters of the relief and forest c...

Old-growth forests represent a very valuable field for research of natural processes. The application of remote sensing was carried out on two old-growth forests in the northwestern part of the Republic of Srpska. The sample plots from OG Janj show relatively higher mean values (NDVI, SAVI and EVI) compared to OG Lom, with the exception of the VARI...

Biodiversity is one of the stand sustainability criteria. The study of the biodiversity of common hazel in the Voronezh region will make it possible to control the conservation of the genetic potential, as well as update information on the state of populations and forms in order to develop recommendations for the effective cultivation of this breed...

The paper presents the results of research on competitive relations between sessile oak seedlings and the most important competing species of woody vegetation, as well as ground flora that grows under a shelterwood, after the preparatory - seed cut of the shelterwood cutting. The research was conducted in sessile oak (Quecus petraea /Matt./Liebl.)...

The research was carried out in primeval forest stands of beech, fir and spruce (Piceo-Abieti-Fagetum illyricum) on brown dolomite soils (Janj) and dominantly shallow limestone soils (Lom). The diameter structure is typical for primeval forests with the participation of large trees in which physiological weakening is visible, especially in the Lom...

The article examines the systems of adaptive forest management in the Republika Srpska (Bosnia and Herzegovina) and forest-steppe and steppe regions of the Central Black Earth region of Russia (within the Voronezh region) in the context of climate change, suggests measures for adaptive forest management. The concept of adaptive measures can be usef...

The main goal of modern forestry today is development and improvement of management methods that can combine economic sustainability, biodiversity conservation and the ability of forest ecosystems to adapt to continuous environmental changes. The significance of global problems leads to increased interest in the study of the functioning of complex...

Natural regeneration of sessile oak forests is a complex process whose final outcome is influenced by numerous factors. The initial phase of development of sessile oak seedlings stands out as the most critical period in the process of natural regeneration of sessile oak forests. As the available light and competition from the accompanying woody spe...

In this study, we analysed patterns of spatial variation in the basal area of live and dead trees and structural complexity in close-to-primeval forests in the Dinaric Mts. The results were compared with an analogous study conducted in the Western Carpathians. The research was carried out in the Janj, Lom and Perucića forest reserves (Bosnia and He...

Hornbeam is one of the most represented undergrowth species in the sessile oak stands in the area of northeastern Serbia. In this paper, a comparative analysis of the growth characteristics of three-year-old and four-year-old sessile oak seedlings and three-year-old and four-year-old hornbeam shoots and root suckers in the sessile oak stand in the...

Istraživanje je vršeno u vještački osnovanoj sastojini crnog bora koja pripada šumi posebne namjene u okviru park-šume Slatina. U radu je izvršeno prikupljanje podataka primjenom Field-Map tehnologije, koja je omogućila uzgojnu analizu osnovnih i pomoćnih elemenata strukture sastojine. Posebno je kreirana baza za prikupljanje podataka koja se odnos...

Modern approaches to the development of nature management are focused on the formation of a system of sustainable development of regions. Forest territories act as an edifier, which has a global impact on the state of all ecosystems under the conditions of increasing anthropogenic pressure, reducing biodiversity and reducing the productivity of nat...

Currently, about 70% of the forest land in Europe is covered by stands composed of two or more tree species. The similar situation can be found outside Europe too. While forest management of monocultures is well described, multispecies forests still need a better understanding to develop appropriate forest practice. Managing mixed forests can be mo...

Silvicultural practices are generally developed to meet societal objectives given the constraints of the site. This simple premise is a foundation of modern silviculture. However, silviculture may vary for other reasons related to cultural factors. This paper reviews the differences in silviculture in the twelve countries that comprise southeastern...

Old-growth forests are spontaneously developed forest ecosystems without direct human influence in which only natural processes take place. In this study we analyzed the structural sustainability of beech-fir-spruce old-growth forests on dolomite and limestone in the Bosnian Dinaric Mountains. The field work was carried out on permanent experimenta...

Research into mixed-forests has increased substantially in the last decades but the extent to which the new knowledge generated meets practitioners’ concerns and is adequately transmitted to them is unknown. Here we provide the current state of knowledge and future research directions with regards to 10 questions about mixed-forest functioning and...

Zemljišta na kršu BiH karakteriše apsolutna dominacija razvojne serije na mezozojskim krečnjacima sa velikim brojem njihovih derivata uslovljenih erozijom. Zemljišta na jedrim krečnjacima karakterišu vrlo male površine nepravilnih elementarnih areala tako da je gotovo nemoguće govoriti o zavisnosti produkcije od jednog, čak i visokog nivoa klasifik...

The data on forest fires in Portugal in the period 1980-2015 were used in the research: the annual number of forest fires, the annual burned area and the average burned area per fire. Increasing trend of the annual number of forest fires (statistically significant at p≤0.01), nonsignificant increasing trend of the annual burned area and decreasing...

The paper analyzes the state of forest cultures with estimated wood quantity in the Republic of Srpska, which are state-owned and managed by the Public Forestry Enterprise "Šume Republike Srpske". These forest cultures cover a total area of 44,424.28 ha or 4.5% of the total forest area of Republic of Srpska. Tree species composition, volume by age...

The object of this study were three coppice beech stands located in the forest management area "Donjevrbasko” close to Banja Luka in the Republic of Srpska, north-western part of Bosnia and Herzegovina. These coppice stands grow in different conditions. According to available eco-vegetation maps, first beech coppice stand develops in favorable site...

The paper presents the most important data on temperature and other microclimate conditions (solar radiation and light regime) in the 127 year old even-aged pure sessile oak forest in the National Park "Fruska Gora" in Serbia. Data collection was conducted in July 2008, using an automatic weather station "WS-GP1" and a lux meter with a selenium pho...

The values of basic climate elements for the definite altitude (from 750 to 1,950 m) were obtained, by the application of the calculated altitudinal linear gradients characterized by the altitudinal distribution of the certain forest zones in the Kopaonik mountain massif in central Serbia. At the lower limit of the zone the average annual temperatu...

Regression of conifers in European mixed old-growth mountain forests has been observed for a long period and studied from different aspects. Old-growth (OG) forests in Bosnia and Herzegovina (BiH) have not experienced heavy air pollution and chronic overbrowsing that have affected many other European OG forests, while climatic and anthropogenic dis...

Regression of conifers in European mixed old-growth mountain forests has been observed for a long period and studied from different aspects. Old-growth (OG) forests in Bosnia and Herzegovina (BiH) have not experienced heavy air pollution and chronic overbrowsing that have affected many other European OG forests, while climatic and anthropogenic dis...

Long-term dynamics of selection (plenter) forests and corresponding virgin forests in NW Balkan countries (Slovenia, Croatia, Serbia, Bosnia and Herzegovina and Montenegro) were examined by assessing changes in diameter structure, stand volume and tree species composition. The parameters were aggregated at the landscape spatial scale, and the inten...

Objectives We examined canopy gap structure and regeneration patterns at the landscape scale using a combination of remote sensing and field-based surveys. Methods The study was carried out in the forest reserve of Lom, an old-growth Fagus-Abies-Picea forest located within the Dinaric Alps in the north-western part of Bosnia and Herzegovina. A high...

Knowledge on the range of variability of montane European forests is hampered by limited data on the natural disturbance regime and by the small size of old-growth remnants. We studied the mixed Fagus–Abies–Picea Lom forest reserve (55.8 ha) in Bosnia and Herzegovina at three different scales: a grid of 40 sampling points to describe the structural...

2011. Gap-phase dynamics in the old-growth forest of Lom, Bosnia and Herzegovina. Silva Fennica 45(5): 875–887. We investigated forest canopy gaps in the mixed beech (Fagus sylvatica L.), silver fir (Abies alba Miller), and Norway spruce (Picea abies (L.) Karst.) old-growth forest of Lom in the Dinaric Mountains of Bosnia and Herzegovina. Gap size,...

Background and Purpose: Regarding official management prescriptions managed fir-spruce forest stands, among others, in Bosnia are supposed to have all-aged structure. We compared the differences between actual and targeted structure in three fir-spruce stands in central Bosnia with special attention given to volume distribution throughout diameter...

This article presents results of the research relating to the influence of light regime on seedling regeneration in the mixed silver fir - Norway spruce forest at Dnolucka planina, Bosnia and Herzegovina. For the purpose of assessing the influence of heterogeneous light environments on density and ADR (apical dominance ratio) of fir and spruce seed...

Aim of this paper is to determine and evaluate the impact of climate change on forest vegetation in Republic of Srpska, based on the analyzed data. There were analyzed air temperature and precipitation amount in the reference period 1961-1991 years for the area of Doboj, Sokolac and Trebinje. Obtained results were compared with the previous referen...

Natural regeneration of beech in mixed stands of beech and fir was researched in the virgin forest Perućica, e.g. the basic elements of stand structure with special reference to beech regeneration characteristics, and the regeneration process in the conditions of broken stand canopy. The analysis included the stand development stages in he virgin f...

The aim of this paper is the determination of air pollution influence on the percentage of stomata in tested woody species, horse chestnut and birch, under examined Banja Luka air pollution conditions. Two locations in Banja Luka town were examined, with different air pollution degrees: the first location is a hostel for students, with the minimal...

The classifications of trees are mainly based on descriptive (attributive) characters and they have a great significance in thinning. In forestry practice (tree marking for felling, forest inventory, etc) in the Republic of Srpska, the most frequently applied classifications are silvicultural-technical (UT) and technical classification of trees, wh...

The basic physical properties of spruce wood from plantations in the surroundings of Banja Luka were researched. The dependence of growth ring diameter and wood density, density, volume porosity, shrinkage, fibre saturation point and absorption of moisture were analysed on three trees average age about 16 years. The data for breast height and for a...