101. Celostna obravnava geokemije trdnih anorganskih delcev v urbanem okoljuMartin Gaberšek, 2020, doctoral dissertation Abstract: Biogeokemično kroženje elementov je v urbanih okoljih zaradi velikega števila prebivalcev in njihovih različnih dejavnosti precej drugačno kot v naravnih. Zaradi kompleksnosti urbanih okolij, je pri geokemičnih raziskavah treba uporabiti celosten pristop. To pomeni, da s kombinacijo različnih metod preučujemo vsebnosti in pojavljanje potencialno strupenih elementov (PSE) v več urbanih materialih. V okviru doktorske disertacije smo na urbanem območju Maribora raziskovali tla, podstrešni, stanovanjski in cestni prah ter trdne delce nakopičene v snegu in delce v zraku. Opredelili smo lastnosti obravnavanih materialov in geokemične značilnosti Maribora ter vpeljali analizo trdnih delcev v zraku s SEM/EDS. Prevladujoč mineral v tleh je kremen (geogen vpliv), v cestnem prahu dolomit (zimsko posipanje cest) in v podstrešnem prahu sadra, ki je najverjetneje sekundarnega nastanka. Analiza vsebnosti 65 elementov v tleh in vseh treh tipih prahov je pokazala, da se ti materiali po kemični sestavi medsebojno močno razlikujejo. Prevladujoč antropogen izvor smo v vseh materialih, z izjemo stanovanjskega prahu, pripisali Cd, Cu, Pb, Sb, Sn in Zn. Dodatno so v posameznih materialih pretežno antropogenega izvora še nekateri drugi PSE. Na dveh industrijskih območjih (Melje in Tezno) so vsebnosti PSE običajno najvišje, zato predvidevamo, da so večinoma posledica pretekle in sedanje kovinske industrije. V primerjavi s tlemi, so vsebnosti PSE višje v prahovih, kar je deloma posledica razlik v njihovem nastanku in v fizikalno-kemičnih lastnostih, vpliva antropogenih virov ter različnega zadrževalnega časa materialov. Podstrešni prah odraža zgodovinske vplive, cestni prah predvsem današnje vplive industrije in prometa ter stanovanjski prah vplive znotraj stanovanj. Z analizo prahov in delcev v snegu ter zraku s SEM/EDS smo ugotovili, da izmed delcev s PSE v vseh materialih prevladujejo oglati Fe-oksidi. Samo na industrijskem območju Melje se pojavljajo Cu-Zn ostružki, ki najverjetneje izvirajo iz livarne in Fe-Cr (Cu, Mn, Ni) ostružki, najverjetneje iz tovarne kovinskega pohištva ter livarne. Za Tezno so značilni predvsem visoki deleži Fe-oksidov in kroglastih Fe-oksidov, pogosto z nizkimi vsebnostmi Mn in drugih PSE. Glede na rezultate, kemična sestava stanovanjskega prahu odraža predvsem vire znotraj stanovanj in manj zunanje vplive. Izmed notranjih virov smo najbolj jasno prepoznali uporabo vžigalnikov v stanovanjih v katerih stanovalci kadijo, kar se odraža v visokih vsebnostih Ce, Fe in La ter pojavljanju Fe-Ce-La-O kroglic. Biodostopni deleži (BAF) PSE se močno razlikujejo med različnimi elementi, vzorci in materiali. V tleh, cestnem in podstrešnem prahu so večinoma večji v želodčni fazi kot v želodčno-črevesni. Za stanovanjski prah velja obratno. Med najbolj biodostopnimi PSE v želodčni fazi so Cd, Cu, Pb in Zn, katerih povprečni BAF je pogosto nad 40 %, ter v želodčno-črevesni As, Cd, Cu in Ni.
Keywords: urbana geokemija, trdni delci, potencialno strupeni elementi, biodostopnost, tla, podstrešni prah, stanovanjski prah, cestni prah, SEM/EDS
Published in DiRROS: 03.03.2022; Views: 1071; Downloads: 359
 Link to full text |
102. Preparation and characterization of the sulfur-impregnated natural zeolite clinoptilolite for Hg(II) removal fromaqueous solutionsMarin Ugrina, Martin Gaberšek, Aleksandra Daković, Ivona Nuić, 2021, original scientific article Abstract: Sulfur-impregnated zeolite has been obtained from the natural zeolite clinoptilolite by chemical modification with Na2S at 150 °C. The purpose of zeolite impregnation was to enhance the sorption of Hg(II) from aqueous solutions. Chemical analysis, acid and basic properties determined by Bohem’s method, chemical behavior at different pHo values, zeta potential, cation-exchange capacity (CEC), specific surface area, X-ray powder diffraction (XRPD), scanning electron microscopy with energy-dispersive X-ray analysis (SEM-EDS), Fourier transform infrared spectroscopy (FTIR), as well as thermogravimetry with derivative thermogravimetry (TG-DTG) were used for detailed comparative mineralogical and physico-chemical characterization of natural and sulfur-impregnated zeolites.
Keywords: zeolit, klinoptilolit, živo srebro, onesnaženje okolja
Published in DiRROS: 03.03.2022; Views: 610; Downloads: 266
 Full text (6,88 MB) |
103. Linear features on karst surfaces: an example from Krk IslandEla Šegina, Čedomir Benac, France Šušteršič, Martin Knez, Jože Čar, 2021, original scientific article Abstract: Krk Island located in the Dinaric karst is characterized by somewhat contradictory, yet undefined depressions of linear geometry. A comprehensive spatial analysis considering over 900 linear features served as a testing ground for revealing the specific circumstances required for the occurrence of the linear morphology on the surface of rather pure karst typically characterized by dolines. Morphological characteristics, spatial distribution and field evidence imply that linear features of different appearance are the outcome of several different mechanisms including speleogenesis and denudation, slope processes and erosion by the torrential surface runoff. Surface runoff occurred due to specific regional geological, morphological and climate conditions in the area. Recently, such linear features exhibit a dry valley- or dry gorge-like appearance. This example from the Dinarides provides insight into the possible circumstances that may cause a temporal surface runoff even in rather pure karst conditions. This knowledge is valuable for understanding other karst areas expressing temporal surface runoff or imprints of its past occurrences.
Keywords: kras, geomorfologija, prostorska analiza, suhe kraške doline, linearne oblike
Published in DiRROS: 03.03.2022; Views: 688; Downloads: 299
Full text (4,24 MB) |
104. Sistem opredelitve rabe tal na ploskvah nacionalne gozdne inventure 2022 (gozd/drugo gozdno zemljišče/negozd) : seminar : online seminar v organizaciji Oddelka za načrtovanje in monitoring gozdov in krajine, Gozdarski inštitut Slovenije, Ljubljana, 31. 1. in 1. 2. 2022, onlineAnže Martin Pintar, Andrej Grah, Mitja Skudnik, 2022, other performed works Keywords: gozdarstvo, gozdovi, negozd, definicija gozda, druge gozdne površine, nacionalna gozdna inventura, gozdna inventura, fotointerpretacija, gozdni rob, raba tal, terenski popis
Published in DiRROS: 24.02.2022; Views: 895; Downloads: 0 |
105. Strokovno mnenje o potencialnih vplivih načrtovanih vetrnih elektrarn na Rogli - Gradišču in Treh Kraljih na izgubo gozdnih površin, lesne zaloge ter prirastkaAndreja Ferreira, Marko Kovač, Anže Martin Pintar, 2022, expertise, arbitration decision Keywords: gozdni sestoji, lesna zaloga, prirastek, predviden poseg, potencialni vplivi, vetrne elektrarne
Published in DiRROS: 24.02.2022; Views: 983; Downloads: 0 |
106. Biotic threats for 23 major non-native tree species in EuropeElisabeth Pötzelsberger, Martin M. Gossner, Ludwig Beenken, Anna Gazda, Michal Petr, Tiina Ylioja, Nicola La Porta, Dimitrios N. Avtzis, Elodie Bay, Maarten De Groot, Kristjan Jarni, Nikica Ogris, Marjana Westergren, 2021, original scientific article Abstract: For non-native tree species with an origin outside of Europe a detailed compilation of enemy species including the severity of their attack is lacking up to now. We collected information on native and non-native species attacking non-native trees, i.e. type, extent and time of first observation of damage for 23 important non-native trees in 27 European countries. Our database includes about 2300 synthesised attack records (synthesised per biotic threat, tree and country) from over 800 species. Insects (49%) and fungi (45%) are the main observed biotic threats, but also arachnids, bacteria including phytoplasmas, mammals, nematodes, plants and viruses have been recorded. This information will be valuable to identify patterns and drivers of attacks, and trees with a lower current health risk to be considered for planting. In addition, our database will provide a baseline to which future impacts on non-native tree species could be compared with and thus will allow to analyse temporal trends of impacts.
Published in DiRROS: 21.02.2022; Views: 614; Downloads: 687
Full text (1,60 MB)
This document has many files! More... |
107. |
108. A meta-analysis of global fungal distribution reveals climate-driven patternsTomáš Větrovský, Petr Kohout, Martin Kopecky, Antonin Machac, Matěj Man, Barbara Doreen Bahnmann, Vendula Brabcová, Jinlyung Choi, Lenka Mészárosová, Zander Rainier Human, Clémentine Lepinay, Rubén López-Mondéjar, Tijana Martinović, 2019, original scientific article Abstract: The evolutionary and environmental factors that shape fungal biogeography are incompletely understood. Here, we assemble a large dataset consisting of previously generated mycobiome data linked to specific geographical locations across the world. We use this dataset to describe the distribution of fungal taxa and to look for correlations with different environmental factors such as climate, soil and vegetation variables. Our meta-study identifies climate as an important driver of different aspects of fungal biogeography, including the global distribution of common fungi as well as the composition and diversity of fungal communities. In our analysis, fungal diversity is concentrated at high latitudes, in contrast with the opposite pattern previously shown for plants and other organisms. Mycorrhizal fungi appear to have narrower climatic tolerances than pathogenic fungi. We speculate that climate change could affect ecosystem functioning because of the narrow climatic tolerances of key fungal taxa.
Keywords: fungi, global distribution, climate
Published in DiRROS: 03.01.2022; Views: 788; Downloads: 573
Full text (1,59 MB)
This document has many files! More... |
109. Climate change and disturbances will shape future temperate forests in the transition zone between Central and SE EuropeLado Kutnar, Janez Kermavnar, Anže Martin Pintar, 2021, original scientific article Abstract: It is expected that climate change as well as abiotic and anthropogenic disturbances will strongly influence temperate forests. Besides changes in the main climate variables, various disturbance factors may significantly worsen conditions for mesic Slovenian forests (SE Europe) dominated by European beech (Fagus sylvatica), Norway spruce (Picea abies) and European silver fir (Abies alba). In Slovenia, the climate has warmed in recent decades, with an average annual rate of increase of about 0.4°C per decade or even more than 0.5°C per decade in summer. In addition, disturbances have caused considerable damage to trees in the most extensive forest types in Slovenia, starting with a widespread ice storm in 2014, followed by bark beetle outbreaks, windthrows and salvage logging interventions. After 2014, salvage logging increased from about one third to two thirds of the total annual felling. Over the last two decades, we have observed a decline in Norway spruce growing stock, with the highest rate of decrease in areas below 500 m a.s.l., and an increasing trend for European beech. Overall, the three dominant species (beech, spruce, silver fir), which together account for more than 70% of the total growing stock, have shown a declining trend over the last 20 years. The patterns observed are broadly consistent with earlier predictions developed for different climate change scenarios and with those reported in many other European countries. Adaptive forest management, which implements close-to-nature silviculture, has been traditionally practised in the region under study and has the potential to play an important role in reducing the risks associated with the impacts of climate change and disturbances in the future.
Keywords: climate warming, disturbance factors, ice storm, bark beetle outbreaks, spruce decline, salvage logging, tree species composition, temperate forest, Slovenia
Published in DiRROS: 03.01.2022; Views: 743; Downloads: 626
Full text (2,55 MB)
This document has many files! More... |
110. Opredelitev gozdov, nerazpoložljivih za oskrbo z lesom (FNAWS)Gal Kušar, Anže Martin Pintar, 2021, original scientific article Abstract: Analizirali smo izbrana merila (naklon in nadmorska višina gozdnih sestojev, prirastek, oddaljenost od gozdnih cest), ki lahko vplivajo na razpoložljivost gozdov za oskrbo z lesom v posameznih ekoloških regijah. Z izbranimi merili (naklon, nadmorska višina, prirastek, gozdni rezervati, prvo varstveno območje Triglavskega narodnega parka in varovalni gozdovi) smo predstavili štiri variante prostorskega informacijskega sloja FNAWS (gozdovi nerazpoložljivi za oskrbo z lesom). Po najstrožji varianti (najostrejša merila) smo med FNAWS uvrstil 6,8 % vseh gozdov, po najmilejši (najbolj ohlapna merila) pa kar 17,6 % vseh gozdov. Na podlagi izkušenj, pridobljenih pri izdelavi karte FNAWS, smo oblikovali dvostopenjski protokol (kabinet, teren) za uvrstitev trajnih vzorčnih ploskev Nacionalne gozdne inventure (NGI) med FAWS/FNAWS. Pri primerjavi obstoječe uvrstitve ploskev Monitoringa gozdov in gozdnih ekosistemov (MGGE) leta 2018 in NGI 2020 na terenu z narejenim slojem FNAWS smo ugotovili dobro ujemanje uvrstitve ploskev med negospodarjene (90 %).
Keywords: merila, naklon, nadmorska višina, prirastek, gozdovi, razpoložljivi za oskrbo z lesom (FAWS), gozdovi, nerazpoložljivi za oskrbo z lesom (FNAWS), Nacionalna gozdna inventura
Published in DiRROS: 18.12.2021; Views: 1142; Downloads: 338
Full text (580,82 KB) |
