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+ 2008 + 2009 + 2010 + 2011 + 2012 + 2013 + 2014 + 2015 + 2016 + 2017 + 2018 + 2019 + 2020 + 2021 + 2022 + 2023 1-2/2024 3-4/2024 5-6/2024 7-8/2024 9-10/2024 11-12/2024 + 2025 new HR EN |
9-10/2024 |
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| RIJEČ UREDNIŠTVA | ||
| Uredništvo HŠD-a | 429 | |
| Forestry review of this years fire season |  
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| IZVORNI ZNANSTVENI ČLANCI | ||
| Damir Drvodelić, Milan Oršanić, Marko Vuković, Tomislav Jemrić | https://doi.org/10.31298/sl.148.9-10.1 |
431 |
| Wild pear (Pyrus pyraster (L.) Burgsd.) fruit and seed morphology depending on fruit size |
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| Summary The current study aims to evaluate the effects of fruit size of wild pear (Pyrus pyraster (L.) Burgsd.) on morphological fruit and seed traits. Wild pear fruit was collected from 10 trees in the area of Žumberačko gorje in the fall of 2022. The fruit was randomly collected from the ground and divided into three groups according to their weight (small (<10 g), medium (10 – 15 g) and large (>15 g)). Fruit size had a significant effect on the following morphological traits: fruit weight, fruit length, fruit width, the number of filled seeds, the weight of fresh seeds per fruit, the weight of 1 fresh seed and the weight of air-died seed, while no significant difference was found for fruit shape index, the number of empty seeds, the weight of 1 air dried seed and the share of seed dry matter. For all the aforementioned traits where the difference was significant, large fruit had significantly highest values, while in most cases (with the exception of the weight of 1 fresh seed), medium fruit had significantly higher values than small fruit. Comparing the correlation coefficients between different fruit size groups, it is evident that higher fruit size traits had a significant effect on the number of filled seeds in medium and large wild pear fruit only. In addition, it is visible that fruit weight and width, and not fruit length, had of the largest impact on the number of filled seeds. The principal component analysis revealed 3 significant principal components with eigenvalues greater than 1, which explained 75.88% of the total variability. It was shown that large fruit distinguish themselves from small and partly between medium by F1 axis. F1 was mainly influenced by fruit weight, fruit length, fruit width, the number of filled seeds, the weight of fresh seeds per fruit and the weight of air-dried seed per fruit. Based on the results obtained from this study, it can be concluded that for nursery production of wild pear seedlings bigger fruit should be used due to the higher number of filled seeds. Keywords: Pyrus pyraster, fruit, seed, morphology, multivariate analysis, nursery |
authors: Damir Drvodelić ŠL Milan Oršanić ŠL Marko Vuković Tomislav Jemrić | |
| Mirzeta Memišević Hodžić, Azra Čabaravdić, Dalibor Ballian | https://doi.org/10.31298/sl.148.9-10.2 |
441 |
| Phenotypic variation in leaf in matural populations of Quercus petraea ((Matt.) Liebl.) in Bosnia and Herzegovina |
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| Summary Sessile oak (Quercus petraea (Matt.) Lieblein) is one of the economically and ecologically very important species of forest trees, which occurs in about 15% of all forests in Bosnia and Herzegovina. The natural populations of sessile oak in Bosnia and Herzegovina represent specific communities that differ from individuals from their optimum in Western, Southern, and Eastern Europe and are essential for the preservation of sessile oak biodiversity in Europe. The goal of the research is to determine the degree of intra-population and inter-population variability of the oak in Bosnia and Herzegovina by analyzing the morphological traits of leaves, as well as the relationship between the variation of populations in phenotypic properties and geo-climatic factors. The results will be used when choosing conservation measures for this forest tree species. Thirteen traits of leaves (shown in Figure 2) were analyzed on 237 trees from 24 natural populations (Table 1, Figure 1) of sessile oak. The results showed that the coefficients of variation for all measured traits ranged from 13.3% for the leaf blade length to 26.5% for the leaf petiole length (Table 3). Analysis of variance (Table 4) revealed the existence of phenotypic variation within and among populations. Variation within populations was on average 28.44% and higher than among populations (average 16.2%). Cluster analysis showed the separation of populations into two main clusters, where Jajce-Komotin and Fojnica populations belonged to one cluster, and all other populations to the other cluster (Figure 7). Most of the leaf traits analyzed (except petiole length, leaf width-to-length ratio, and the number of lobes) were correlated with latitude, the mean temperature of the quarter with the most precipitation, and the amount of precipitation in the warmest quarter (Table 7). The obtained variability of traits should be preserved because sessile oak populations will strive for a balanced state in the future, with corrections of the genetic structure through natural selection and migration. Keywords: Quercus petraea; natural populations; variation; leaves; morphological traits |
authors: Mirzeta Memišević Hodžić Azra Čabaravdić Dalibor Ballian | |
| Taha Yasin Hatay, Zübeyir Özcan, Selçuk Gümüş | https://doi.org/10.31298/sl.148.9-10.4 |
465 |
| A study on measuring an objective aspect score for analysis in forestry: example of forest roads and landslide areas |
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| Summary In forestry, measurements are made to understand the state of natural ecosystems and their changes. The studies have reported that geographical features such as elevation, slope and aspect affect the ecosystem dramatically and that it is crucial to measure them accurately. Also, in forestry analysis and risk assessments, these features are required to be scored objectively and accurately. Elevation and slope can be easily measured and scored using GISbased systems. Although the aspect can be measured simply, the studies suggested diverse approaches on scoring it. The reason for this diversity is essentially that the studies determine the aspect visually and that the circular structure of the aspect makes the scoring difficult. Also, the score of the aspect value differs according to the study hemisphere and concept. Therefore, the requirement of an objective and easily applicable GIS-based measurement and scoring method of the aspect is genuine. In the study, Maçka Forestry Enterprise, which is located in the Trabzon province of Türkiye, was chosen and the aspect map of the region was obtained. Then, 30 forest roads and 30 landslide areas were selected from the region. The forest roads and landslide areas were evaluated according to their aspect, visually. These visual assessments were scored according to the studies in the literature. After all, the aspect scores of the forest roads and landslide areas were also determined according to the proposed method. This method suggests scoring the aspect in a pixel-wise manner and circular averaging. The results were compared and have shown that the aspect scoring studies in the literature are subjective and contradict each other in many ways. The results also showed that the proposed method is accurate, objective, and effective in measuring and scoring the aspect. Also, the proposed method provides a virtual approach rather than a visual one. Finally, the proposed method is shared as an open-source ArcMap Toolbox to be delivered to the end-user. Keywords: forest road, landslide, aspect, aspect score, aspect analysis |
authors: Taha Yasin Hatay Zübeyir Özcan Selçuk Gümüş | |
| PREGLEDNI ČLANCI | ||
| Vladimir Stojanović, Damir Demonja, Sanja Tišma, Maja Mijatov Ladičorbić, Aleksandra Dragin | https://doi.org/10.31298/sl.148.9-10.5 |
477 |
| The contribution of environmental interpretation in nature protection: the case of protected areas in the Republic of Croatia |
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| Summary The interpretation of natural values and the management of visitors in protected areas are related in multiple ways and are an important link in nature protection activities. This paper examines the basic elements of the interpretation and management of visitors in the selected protected areas of the Republic of Croatia. Protected areas are one of the main attributes of the tourist image of Croatia, with significant economic effects in the generated traffic of visitors. However, this can also contribute to the degradation of natural values or, on the other hand, can help protect nature. Due to such challenges, it is necessary to better understand the importance of visitor centres, tourist tours and the way in which codes of ethics are applied in protected areas. In this paper the representation of environmental interpretation techniques and tools in seven protected areas in Croatia were investigated, using information that was obtained mainly through survey research. The basic results indicate that Croatia has made progress in the previous period in the field of interpretation of natural and cultural values in its protected areas. Such progress is not only related to regions where tourism has a mass character and where visits are significant, but has also been made in remote continental parts of the country. Such an approach in the development of protected areas also indicates that these areas are not only massive tourist destinations, but also places for a more complex understanding of the concept of nature protection and sustainable development associated with the use of its potentials. Keywords: nature protection, interpretation, visitor management, protected areas, sustainability, tourism, Croatia |
authors: Vladimir Stojanović Damir Demonja Sanja Tišma Maja Mijatov Ladičorbić Aleksandra Dragin | |
| Damir Barčić, Matija Lukinić, Stjepan Posavec | https://doi.org/10.31298/sl.148.9-10.6 |
489 |
| Analysis of fire protection measures and forest protection costs in the karst area of the Republic of Croatia |
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| Summary The paper analyzes measures necessary for fire protection and the associated costs related to the period before, during and after the fire. It is obvious that costs increase in conditions of frequent fires. Therefore, it is necessary to intensify preventive measures and works that can reduce the risk of fires in open space and affect the reduction of the area affected by fire. This paper offers a list of preventive measures that should be implemented during every fire season for the sake of the effectiveness of the system of firefighting activities. Namely, their effectiveness can directly affect the reduction of total costs when extinguishing fires, because less consumption and use of resources in firefighting is required. The costs are high when the firefighting intervention of ground forces is taken into account, which is increased by the participation of firefighting aircraft. The key period in which preventive measures should be successfully implemented is during the fire season from June 1 to September 30. Also, any investment in preventive measures in forestry reduces the costs of rehabilitating fire areas and restoring forests and forest land. Keywords: preventive measures, fires, suppression, damages, protection |
authors: Damir Barčić ŠL Matija Lukinić Stjepan Posavec ŠL | |