Omorika Digital repository of the Faculty of Forestry, University of Belgrad
Not a member yet
2577 research outputs found
Sort by
ANALYSIS OF RECREATION ACTIVITIES IN THE AREA OF OUTSTANDING NATURAL LANDSCAPE ”ADA CIGANLIJA”
No full textUrban recreational spaces are a necessary part of the city, affecting the everyday lives of its residents and the overall quality of living. These are spaces that should incorporate ecological, socio-cultural, and aesthetic functions, harmonized with the surrounding environment to contribute to its improvement. When recreational spaces are part of urban areas and simultaneously protected natural area, the challenges faced by experts in terms of environmental protection are numerous. Intensive degradation processes in protected recreational areas are influenced by the location of the area, the intensive visitor flows and the type and spatial distribution of recreational activities so it is important to approach the recreational function from the perspective of nature protection.
The outstanding natural landscape ”Ada Ciganlija” represents one of the most significant and most frequently visited recreational areas in Belgrade. Recreational pressure and the highest intensity of use are especially pronounced during the summer months. As a protected natural area, it is under the second (approx. 70 ha) and third categories of protection (approx. 400 ha).
The aim of this paper is to analyze recreational activities within protected area” Ada Ciganlija” from the perspective of their characteristics and spatial distribution. Classification of presented recreation activities and their distribution enable the consideration of landscape transformation and spatial conflicts that are the result of the overlapping of spaces that are intensively used for recreational purposes and the territory of the protected natural area. Although recreation is an important element of human health and well-being, it is important that recreational activities are developed in a way that the ecosystem can retain its characteristics, form, and functions. This paper tends to identify the spatial contradictions in terms of recreation activities that prevent the sustainable use of area values and the sustainable development of the Ada Ciganlija. Analysis and valorization of recreational activities of the current situation should serve as a basis for the formation of guidelines and recommendations for further protection, improvement and preservation of The outstanding natural landscape ”Ada Ciganlija”
AI-Driven Semantic Re-encoding and Collaborative Design for the Holographic Presentation of Cultural Heritage
No full textThis paper systematically studies the ”collaborative semantic redesign of holographic images of cultural holography using AI.”
Addressing the challenges of high reflectivity, complex decorative
patterns, and structural incompleteness in the 3D reconstruction of
porcelain and utensil artifacts, a holographic re-expression model
integrating artificial intelligence (AI) is proposed. Accurate geometric modeling and color correction are achieved through multi-view
imaging, hyperspectral scanning, and structured light data acquisition. NeRF reconstruction, rotational/axisymmetric constraints,
and a Poisson fusion algorithm are combined to complete defect
filling and topological restoration. A holographic algorithm based
on deep learning and frequency domain optimization is further
employed to generate printable computer-generated holograms
(CGHs). This is validated using both holography color holography (Denisyuk) and digital direct write holography (DWDH) approaches, achieving an end-to-end closed loop from data to finished
product. Experimental results demonstrate that AI-driven geometric and texture restoration, spectral mapping, and artifact suppression effectively reduce chromatic aberration (ΔE ≈ 1.8), enhance
clarity, depth, and semantic usability, and shorten production cycles
by approximately 30%. This approach provides a new technological
paradigm for cultural relic display and digital humanities research
Groundwater Contaminant Exceedances at the Red Hill Facility: Analysis of Post-Spill Monitoring Data (2021–2025)
No full textThis abstract presents a secondary analysis of publicly available groundwater monitoring data from around the Red Hill Bulk Fuel Storage Facility (Site), accessed via the JBPHH Safe Waters website. The dataset includes 4,097 groundwater samples collected between November 2021 and March 2025, representing conditions observed throughout the Site’s monitoring well network. Since Red Hill Shaft (RHMW2254-01) was disconnected from the water supply network on November 28, 2021, these results do not represent tap water quality. Exceedances in groundwater were determined using threshold values (Environmental Action Levels established by Hawaiʻi State Department of Health) specific to each parameter, for example, 0.4 mg/L for the total petroleum hydrocarbon (TPH)–Diesel Range and 0.5 mg/L for the TPH–Oil Range. TPH-Diesel Range is the most common contaminant, with 198 exceedances across the Site, followed by TPH-Oil Range (80), 1-methylnaphthalene (31), benzo(a)anthracene (24), and naphthalene (19). Guideline exceedances were most frequent in late 2021, likely due to the fuel spill event. No exceedances of metals, alkalinity, and total dissolved solids were recorded in groundwater during the period analyzed. Spatially, TPH concentrations were unevenly distributed, with exceedances concentrated in a few specific wells. The highest number of TPH (combined Diesel and Oil range) exceedances occurred in wells RHMW02 (159), RHMW2254-01 (23), RHMW01 (17), RHMW04 (16), RHMW03 (13), and RHMW08 (13). The most recent exceedances were registered on: RHMW01 and RHMW02 (Mar-3-25), RHMW03 (Jul-16-24), RHMW04 (Jun-2-23), RHMW08 (May-11-22), and RHMW2254-01 (Nov-15-22). Although no exceedances have been recorded in the Red Hill Shaft since November 2022, and its extensive pumping has continued since January 2022, hydrocarbon contamination continues in nearby monitoring wells. RHMW02 stands out as a contamination hotspot, exhibiting the highest frequency and diversity of exceedances, including pre-2021 detections potentially caused by its proximity to the 2014 spill location. Reported TPH exceedances show seasonal variation (peaks in the spring and a decline in the fall) and might be influenced by groundwater recharge dynamics. However, the exact mechanism of contaminant mobilization is much more complicated, as Red Hill Shaft pumping affects groundwater flow and water table elevations at the nearby wells. Given the complexity of this basalt aquifer, characterized by considerable hydraulic conductivity anisotropy, detailed tracer studies are essential to accurately assess groundwater flow dynamics and contaminant transport pathways within the Site
Bio geometry design workshop
No full textCreative platform Geometry workshop started in year 2012, (logo
shown on Image 1 left and photo from Curious EU project) always
included fantastic artists as collaborators working together with
students so currently specially extended gratitude goes to the best
artist in Serbia Dr. Art Milica Rakic. She is serving as Art Director of
Geometry Workshop and constantly adding great additional value.
Bio Geometry Design Workshop is using geometrical knowledge as
a powerful tool with biology as a source of inspiration that leads to
design that must be sustainable and eco-friendly in absolutely
natural way
Primena predtretmana vrelom vodom u biorafinaciji drveta
No full textWood can be processed to create various products or components that can cover a wide range of
purposes. As a natural reservoir of organic matter, wood is also an important raw material for the
production of chemicals and fuels. The limited reserves of fossil resources, environmental
pollution and climate change make it necessary to obtain energy and chemicals from renewable
raw materials. In this context, there is a growing demand for wood as a renewable and available
raw material, which also emphasizes the importance of its optimal use. Namely, the end products
made from wood often contain elements that do not significantly enhance the quality of these
products, or may even have negative effects. In addition, degradation and permanent loss of
valuable wood components can occur during the chemical processing. The introduction of hot
water pretreatment in wood processing can be a way to biorefine wood and a solution for a more
rational use of its ingredients. In this way, some valuable products such as hemicelluloses,
saccharides or extractives (e.g. tannins) and other compounds can be extracted from the wood
before the main process. The type and amount of products separated depend on a number of
factors such as the wood species and the pretreatment conditions (temperature, pressure and
duration of the process). At the same time, changes in its chemical composition can improve some
properties of the wood after pretreatmentor facilitate its further processing. This paper shows the
influence of hot water pretreatment on some properties of wood, such as dimensional stability and
heating value. The possibilities of using water-treated wood for the production of wood products
with improved properties are also show
The observatory approach: continental-scale wildlife density estimation in Europe and more
No full textThe European Observatory of Wildlife (EOW), within the ENETWILD project (www.enetwild.com,
funded by the European Food Safety Authority), focuses on improving European wildlife monitoring
by developing international data collection standards, supporting density estimation guidance, and
fostering open, collaborative data networks. To achieve these objectives, EOW implemented a
protocol using the random encounter model (REM) based on camera trap (CT) data for estimating
mammalian density. This protocol integrates photogrammetry, allowing a three-dimensional
reconstruction of camera scenes for calculating parameters essential to REM, including day range and
detection values. The workflow, optimized on the Agouti platform, streamlines image processing and
parameter estimation. Since 2021, ENETWILD stakeholders have employed the EOW protocol to assess
densities of species like wild boar, roe deer, and red fox across Europe. By 2023, 30 institutions
surveyed 44 sites in 22 countries, accumulating 79,092 CT activity days from 1,722 CT deployments.
Density estimates show interannual stability with refined precision across several monitored
populations. In 2024, network expansion included 40 institutions across 64 sites, prioritizing African
swine fever (ASF)-impacted areas. 33 sites now fall within ASF-present countries, and 28 lie near the
ASF frontline, highlighting regions where wild boar and domestic pigs coexist and where ASF risk is
high. 20 sites (31%) contain an interface wild boar – domestic pigs, while 25 sites (39%) include wetland
habitats, which are of possible epidemiological interest for avian influenza both within bird populations
themselves and in relation to possible spill-over events to mammals (wild and domestic)
Aleppo pine (Pinus halepensis Mill.) in dendroflora оf Belgrade
No full textČetiri stabla alepskog bora (Pinus halepensis Mill.) su zabeležena u Miljakovačkom parku u Beogradu. Alepski bor je kserotermna i oligotrofna vrsta poreklom sa Mediterana i veoma retko se gaji na području Srbije. Stablima su premerene visine i prsni prečnici, kao i dimenzije četina. Stabla su dobrog zdravstvenog stanja, nisu napadnuta bolestima i štetočinama i produkovala su šišarice. S obzirom na klimatske promene, koje u Srbiji uslovljavaju sve topliju klimu, kserotermne mediteranske vrste koje u prošlosti nisu bile pogodne za uzgoj u Srbiji, mogle bi u budućnosti da postanu značajan činilac u dendroflori zelenih površina urbanih područja
Flowering Patterns of Cornus mas L. in the Landscape Phenology of Roadside Green Infrastructure Under Climate Change Conditions in Serbia
No full textOne of the emerging services provided by roadside green infrastructure is its contribution to the quality of landscape phenology, which is measured through the succession of colours and forms throughout the seasons. In the seasonal dynamics of space, flowering phenological patterns play a key role, particularly in early blooming species such as Cornus mas L. Therefore, this paper aims to highlight the significance of the Cornelian cherry as a component of roadside green infrastructure in the southwestern suburban zone of Belgrade. Through an integrative approach to phenological and climatic elements, and by means of a specific case study covering the period from 2007 to 2025, under climate change conditions, the influence of air temperature and precipitation on local flowering patterns of the Cornelian cherry has been assessed. Based on 1140 phenological observations conducted over 19 consecutive years, from January to April, key flowering elements were identified—those that influence pollination, fruiting, and the species’ practical potential. The Mann–Kendall, Sen’s slope, Rayleigh, and Watson–Williams tests were used to examine spatio-temporal changes in flowering patterns, while the Spearman Rank test and circular statistics were applied to quantify correlations among the analysed parameters. The results confirm that Cornelian cherry is an adaptive and sustainable species that continuously provides visual identity during its flowering period, while simultaneously reflecting climate change through phenological responses. These phenological responses are closely linked to local climatic conditions. In addition to enriching landscape phenology with vibrant visual features during the colder months, Cornelian cherry also enhances biodiversity by providing ecosystem services as a nectar-producing species, with its pollen serving as an early and valuable food source for bees. The study also confirms that the seasonal dynamics of landscape phenology can be used as a scientifically valid criterion for assessing the ecological quality of roadside green infrastructure
The Sustainability of Rosa rugosa Thunb. Under Climate Change Conditions: A Study of Morphological Variability in Urban Areas
No full textUrban stressors intensified by climate change affect plants in terms of growth, vitality, and ornamental value. This study examines how different light availability (full sun, partial shade, and shade) affect the development, fruit morphology, and planting suitability of Rosa rugosa Thunb. in urban environments. A total of 360 shrub individuals were analyzed in a linear formation along a riverbank in Novi Sad, Serbia, linking climatic parameters with the bioecological characteristics of the investigated plants. Comparison of the groups was performed using the multivariate methods and Principal Component Analysis (PCA). Furthermore, 13 morphological parameters were analyzed on a sample of 100 fruits per group. There were no significant deviations in fruiting patterns, but the fruit parameters, even though showing high yield and favorable fruit size, indicated that light variation affects morphology. These findings confirm the species’ resilience and adaptability to urban environments, capable of withstanding various challenges, including proximity to paved surfaces, heavy traffic, and diverse light conditions. R. rugosa proves to be an ideal choice for urban planting and nature-based solutions that enhance human well-being
Bottom-up and top-down drivers influence urbanization effects on insect herbivory in oaks
No full textUrban forests provide essential ecosystem services, including pest control, biodiversity conservation, and human health benefits. Herbivory is a widespread biotic interaction that shapes ecosystem functions, such as primary productivity and soil fertility, which underpin these services. Urbanization can disrupt plant–herbivore interactions by altering plant traits, such as nutrient content or phenolic compounds (bottom–up factors), or by changing the abundance of herbivore natural enemies (top–down control), potentially threatening pest regulation and the ecosystem services provided by urban forests. Disentangling these drivers of herbivory is crucial for designing and managing urban forests to enhance resilience. To address this, we examined insect leaf herbivory on Quercus robur trees in urban and rural forest stands across 13 European cities (n = 104 trees). To assess top–down effects on herbivory, we excluded vertebrate (e.g. birds, bats), invertebrate (e.g. ants), or both groups of predators from branches on each tree using different exclosure types. We then measured insect damage on both control and predator-excluded branches. To evaluate bottom–up drivers, we measured leaf traits, specifically nutrients and phenolic compounds, and tested for correlations with leaf damage. Additionally, we recorded temperature within stands, an abiotic factor that may modulate both top–down and bottom–up forcing on herbivory. Herbivory was 24% lower on urban trees compared to rural trees. In turn, excluding vertebrate (but not invertebrate) predators increased herbivory, on average, by 40%, but predator effects were stronger in urban stands. Urban trees also had higher leaf quality, with higher nutrient and lower phenolic concentrations; however, these traits did not correlate with herbivory. Temperature was positively associated with urbanization and correlated positively with predation, but did not correlate with herbivory and did not mediate the bottom–up or top–down effects of urbanization. Overall, we find that urbanization affects herbivory through both bottom–up and top–down processes, independent of temperature-related local conditions. Despite stronger predator effects and higher leaf quality, urban trees experienced lower herbivory, suggesting that unmeasured factors, such as changes in herbivore behaviour or community structure, may play an important role. Further studies are needed to deepen our understanding and inform urban forest management