1851. Vegetacijske in talne razmere v izbranih gozdovih Paškega Kozjaka, Završ in Gornjega Doliča (GGO Slovenj Gradec)Valerija Babij, Aleksander Marinšek, Lado Kutnar, Janez Kermavnar, Suzana Podvinšek, Veronika Valentar, Ljudmila Medved, 2025, treatise, preliminary study, study Keywords: vegetacija, tla, rastišče, ekologija gozda, delavnice, Javna gozdarska služba, Slovenija
Published in DiRROS: 20.06.2025; Views: 512; Downloads: 238
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1854. Load influence on the friction and wear behavior of arc ion plated Cr coatingsJinpeng Yang, Guanghui Wang, Haimin Yan, Zijun Wang, Cean Guo, Jian Zhang, 2025, original scientific article Keywords: friction and wear, Cr coating, arc ion plating, tribofilm
Published in DiRROS: 20.06.2025; Views: 439; Downloads: 240
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1855. A comprehensive occurrence dataset for European Ostracoda inhabiting groundwater and groundwater-dependent ecosystemsNataša Mori, Živa Vehovar, Traian Brad, Gergely Balázs, Constanze Englisch, Cene Fišer, Santiago Gaviria, Sanja Gottstein Matočec, Christian Griebler, Marius Kenesz, Lee R. F. D. Knight, Florian Malard, Stefano Mammola, Pierre Marmonier, Alejandro Martinez, Maja Zagmajster, 2025, original scientific article Abstract: Motivation Groundwater ecosystems sustain a unique and globally important biodiversity but remain understudied due to sampling and exploration challenges, as well as a shortage of taxonomic experts. Groundwater ostracods, like other groundwater taxa, exhibit a high degree of endemism, rarity and subterranean specialisation, positioning them as potentially vulnerable organisms. To better understand biodiversity patterns and the conservation needs of this highly diverse group, we assembled a team of experts to gather the most comprehensive information available about groundwater ostracods in Europe. We present a dataset comprising 2065 occurrence records of 110 species, 11 undescribed species and 5 subspecies of groundwater ostracods. This open dataset may support future research on the distribution, evolutionary pathways and conservation needs of European groundwater ostracods, as well as inspire targeted sampling efforts in regions with currently limited data available. Main Types of Variables Contained Occurrence records of groundwater ostracods, with details about taxonomy, source of records, occurrence locality, habitat type and species dependence on groundwater (obligate [stygobiont] versus facultative groundwater-dwellers [stygophile]). Spatial Location and Grain Geographical Europe, spanning 32 countries. Occurrence records were assigned decimal degrees coordinates (EPSG:4326). Most occurrence records are at 100 m resolution. Time Period 1915–2024. Major Taxa and Level of Measurement Crustacea: Ostracoda. Most records have species or subspecies-level identification, while some are identified to genus or family levels. Software Format Comma-separated values file (.csv) and Excel file (.xlsx), with UTF-8 encoding and metadata provided following the Darwin Core standard.
Keywords: alluvial aquifers, conservation, ecotypes, habitat types, hyporheic zone, karst, occurrence data, ostracods, springs
Published in DiRROS: 20.06.2025; Views: 583; Downloads: 450
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1856. Trends in atmospheric nitrogen deposition in Macedonia studied by using the moss biomonitoring techniqueKaterina Bačeva Andronovska, Trajče Stafilov, Robert Šajn, Biljana Jordanoska Shishkoska, Valentina Pelivanoska, Lambe Barandovski, 2024, original scientific article Abstract: This study examined the nitrogen content in moss samples collected across Macedonia over a 15-year period (2005, 2010, 2015 and 2020) from 72 consistent sampling locations. The nitrogen content was determined using the Kjeldahl method, providing insight into the trends of atmospheric nitrogen deposition across different regions. Descriptive statistical analyses, including spatial distribution maps, were used to compare the temporal variations and regional nitrogen levels. In addition, box-plots (P25–P75) and whiskers (P5–P95) were constructed to provide a comprehensive view of the variability across different tectonic units and zones, allowing for an in-depth understanding of the spatial distribution of nitrogen across the country. The study revealed that the median nitrogen content in moss samples decreased from 1.21% in 2005 to 1.04% in 2015, followed by a slight increase to 1.07% in 2020. The highest nitrogen concentrations were consistently found in areas with heavy agricultural activities and high traffic volumes, indicating the direct impact of these anthropogenic factors. The comparisons across regions and geological zones also highlighted the substantial variation in nitrogen levels, reflecting the diverse environmental pressures in different parts of Macedonia. This long-term analysis not only offers valuable insights into the trends in nitrogen pollution but also underlines the necessity for targeted policy interventions, particularly in the regions where nitrogen levels remain persistently high.
Keywords: nitrogen, air pollution, moss biomonitoring, Kjeldahl method, Macedonia
Published in DiRROS: 20.06.2025; Views: 459; Downloads: 156
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1857. Assessing the distribution of potentially toxic elements in bryophytes in relation to surface soil contamination in the Veles region, North MacedoniaTrajče Stafilov, Katerina Bačeva Andronovska, Robert Šajn, Marija Jeftimova, 2025, original scientific article Abstract: This study explores the relationship between bryophyte (mosses) diversity and environmental factors in the Veles region, North Macedonia, focusing on the spatial distribution of chemical elements in the moss and surface soil samples collected from the same locations. Eighteen moss samples were analyzed alongside surface soils. Advanced spectrometric techniques were used to identify potentially toxic elements (PTEs) and their links to anthropogenic and natural sources. While metal measurements are widely reported in the literature, the novelty of this study lies in its integrative approach, combining moss biodiversity analysis with a direct comparison of element concentrations in both moss and soil. The results show significant patterns of deposition of PTEs and highlight the long-term impact of industrial activities on biodiversity and air pollution. These findings provide valuable insights into conservation strategies and environmental management in the midst of ongoing ecological change. Five groups of elements were separated using factor analysis: G1 (Al, Cr, Cu, Fe, Li, Mg, Mn, Ni and V); G2 (Ba and Na); G3 (K, P and Mo), G4 (Pb and Zn), and G5 (Ag, As and Cd), of which two groups (G1 and G2) were found to be typical geochemical associations, while G4 and G5 are anthropogenic associations due to the emission of dust from contaminated soils and the slag heap of the Pb-Zn smelting plant. Group 3 represents a mixed geochemical and anthropogenic association. It was found that Pb, Zn, Cd, and As could indeed be detected in the moss in the study area, underlining its ability to detect pollutants in the air. A comparative analysis of moss and soil samples revealed significant differences in element concentrations, with most elements being more concentrated in soil. These results underline the role of moss as a bioindicator of atmospheric deposition, detecting pollution trends rather than direct soil contamination.
Keywords: moss biomonitoring, air pollution, surface soils, potentially toxic elements, Veles region, North Macedonia
Published in DiRROS: 20.06.2025; Views: 543; Downloads: 169
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1858. Findability of geothermal energy websites in seven EU countries and IcelandMateja Macut, D. F. Bruhn, Jessica Maria Chicco, Gregor Götzl, Tamara Marković, Annamária Nádor, J. A. Newson, P. G. Ramsak, Nina Rman, 2025, review article Abstract: Obtaining information on scientific topics and access to websites with multidimensional data is a crucial part of any geothermal project development. Using the Internet to publish information according to the FAIR principles (Findability, Accessibility, Interoperability and Reusability) on topics that are not yet well known to stakeholders could improve not only general knowledge but also public acceptance for increased use of geothermal in the future. This research lists 90 geothermal websites from eight countries: nine in Austria, 13 in Croatia, eight in Hungary, 17 in Italy, seven in Germany, 16 in Iceland, 13 in the Netherlands and seven in Slovenia, and classifies them based on findability and content criteria. It is an issue that only 41 % of these national-relevant websites are easy to find using a browser and keywords, while for the rest an expert advice is needed. The user-impression by searching these websites was checked, for example, on language, graphical presentation, type of information, content, and references. It was expected that Iceland, Italy and Germany, as the countries with the largest geothermal utilization, have the most information available. Iceland has the most findable and quality websites, while Italy has the most listed websites but only a few are easy to find. Germany is not ranked as high as expected. The Netherlands and Croatia do not stand out but have few very good websites. Hungary and Austria show similar results while Slovenia needs most improvements.
Keywords: national geothermal website, geothermal database, content and graphics, open access information, FAIR principles, data sharing
Published in DiRROS: 20.06.2025; Views: 467; Downloads: 179
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1859. Testing species boundaries of an unknown Dolomedes (Araneae, Dolomedidae) morphospecies from isolated islandsGrégory Cazanove, Kuang-Ping Yu, Brice Derepas, Arnaud Henrard, 2025, original scientific article Abstract: Raft spiders, family Dolomedidae, represent a group of spiders with 7 genera distributed near globally well known for a semi-aquatic lifestyle. One of the iconic genera representing such a unique lifestyle is the largest and diverse dolomedid genus Dolomedes. Although Dolomedes is well surveyed in parts of its distribution, its diversity in the tropics remains largely unknown, such as the western Indian Ocean region with most of the islands unsurveyed. Recent expeditions to Madagascar and La Réunion Island discovered a series of specimens that appear to belong to an unknown morphospecies of Dolomedes, exhibiting varying degrees of differences in the diagnostic characteristics. To further test and define their species boundaries, we include molecular evidence followed by species delimitation analyses. Our findings indicate that specimens from both islands are conspecific. Consequently, we introduce a new species to science, Dolomedes reuniascar sp. nov., providing detailed illustrations, descriptions of its variations and ecological characteristics. Based on our observations and existing literature, we speculate that the presence of this species on the two isolated islands could be attributed to either highly efficient dispersal abilities, such as ballooning of spiderlings, or human-mediated introduction events.
Keywords: fishing spider, phylogeny, taxonomy, Madagascar, Réunion
Published in DiRROS: 20.06.2025; Views: 435; Downloads: 416
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1860. Ambient intraborehole flow in a highly productive aquifer in Ljubljana, SloveniaJanja Svetina, Joerg Prestor, Simon Mozetič, Mihael Brenčič, 2024, original scientific article Abstract: Study region: Ljubljansko polje aquifer in the central part of Slovenia.
Study focus: Impeller flowmeter was used together with the water quality probe to determine the flow characteristics of water under ambient conditions (without pumping) in 13 boreholes in a highly productive alluvial aquifer. The study focused on analysing the characteristics and variability of intraborehole flows in relation to the technical features of the boreholes, as well as the geometry and geological composition of the aquifer.
New hydrological insights for the region: The study has shown that vertical hydraulic gradients are not limited to complex multiple aquifer systems but can also occur in uniform alluvial aquifers without typical aquitard layers if hydraulic head differences exist between the upper and lower parts of the aquifer. The intraborehole flows are mainly caused by pressure-driven convection in deeper boreholes with long screens. The direction and velocity of these flows are strongly influenced by the morphology of the bedrock. Downward water flows are closely related to the local deepening of the bedrock and upward flows to the local rise of the bedrock. In some boreholes, intraborehole flow rates exceed the typical pumping rates for groundwater sampling, raising concerns about the representativeness of samples collected using conventional sampling methods. Hydrochemical logs proved to be a valuable complementary method to determine the locations of the main inflows.
Keywords: borehole logging, impeller flowmeter, intraborehole flow, groundwater, Ljubljansko polj
Published in DiRROS: 20.06.2025; Views: 450; Downloads: 179
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