1. Poročilo o spremljanju stanja gozdov za leto 2023 : vsebinsko poročilo o spremljanju stanja gozdov v skladu s Pravilnikom o varstvu gozdov (2009)Andrej Grah, Janez Kermavnar, Nike Krajnc, Lado Kutnar, Tom Levanič, Nikica Ogris, Anže Martin Pintar, Matej Rupel, Mitja Skudnik, Primož Simončič, Saša Šercer, Urša Vilhar, Daniel Žlindra, 2024, končno poročilo o rezultatih raziskav Ključne besede: varstvo gozdov, monitoring, stanje gozdov, zdravstveno stanje krošenj, popis povzročiteljev poškodb, meteorološke meritve, osutost dreves, poročila, Slovenija Objavljeno v DiRROS: 02.07.2024; Ogledov: 100; Prenosov: 103
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2. Vegetacijske in talne razmere v izbranih gozdovih Konjiške gore v GGE Slovenske KonjiceValerija Babij, Aleksander Marinšek, Lado Kutnar, Peter Horvat, Matej Tajnikar, Urban Orož, Marko Lekše, Bojan Bračič, Niko Laznik, Andrej Breznikar, Erika Kozamernik, 2024, elaborat, predštudija, študija Ključne besede: vegetacija, tla, rastišča, ekologija gozdov, Javna gozdarska služba, Slovenija Objavljeno v DiRROS: 02.07.2024; Ogledov: 132; Prenosov: 37
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3. Vegetacijske in talne razmere v izbranih gozdovih GGE Brkini IValerija Babij, Aleksander Marinšek, Lado Kutnar, Peter Horvat, Matej Reščič, Erika Kozamernik, 2024, elaborat, predštudija, študija Ključne besede: vegetacija, tla, rastišča, ekologija gozdov, Javna gozdarska služba, Slovenija Objavljeno v DiRROS: 02.07.2024; Ogledov: 105; Prenosov: 43
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4. Vegetacijske in talne razmere v izbranih gozdovih Bele krajineValerija Babij, Aleksander Marinšek, Lado Kutnar, Peter Horvat, Andrej Držaj, Andrej Kotnik, Roman Šimic, Erika Kozamernik, 2024, elaborat, predštudija, študija Ključne besede: vegetacija, tla, rastišča, ekologija gozdov, Javna gozdarska služba, Slovenija Objavljeno v DiRROS: 02.07.2024; Ogledov: 124; Prenosov: 43
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5. Gozdna tla in vegetacija eno leto po požaru na Goriškem KrasuValerija Babij, Lado Kutnar, Aleksander Marinšek, Janez Kermavnar, 2024, izvirni znanstveni članek Povzetek: V letu 2023 − eno leto po obsežnem požaru na Goriškem Krasu, ki je divjal julija leta 2022 − smo na izbranih gozdnih vzorčnih ploskvah popisali zeliščno, grmovno in drevesno vegetacijo in analizirali tla do globine 10 cm. Ploskve smo izbrali na lokacijah stalnih vzorčnih ploskev ZGS z različno stopnjo poškodovan osti zaradi požara. Na izbranih ploskvah smo skupno popisali 260 vrst praprotnic in semenk. V drevesni plasti smo popisali trinajst vrst (enajst domorodnih in dve tujerodni), v grmovni plasti trideset, v zeliščni pa 255. V drevesni plasti so bili najpogostejši mali jesen, črni gaber in črni bor, v grmovni mali jesen, navadni ruj in robide. V zeliščni plasti smo med drugimi popisali tudi devetnajst drevesnih vrst, ki so pomembna zasnova pri naravni obnovi požganega gozda na Krasu; najpogostejša sta bila črni gaber in rešeljika. Gradient poškodovanosti po požaru se jasno kaže v večini vegetacijskih in talnih spremenljivk. Statistično značilne razlike med skupinami ploskev z različno stopnjo poškodovanosti smo ugotovili za šest parametrov: pH-vrednosti in vsebnosti žvepla v organskem delu tal, zastiranje drevesne plasti, zastiranje mahov, število vrst v spodnji drevesni plasti, število vrst zeliščne plasti. Na ploskvah smo prepoznali devet (ter še tri vrste na požarišču zunaj ploskev) invazivnih ali potencialno invazivnih tujerodnih rastlinskih vrst; med drevesnimi sta bila najpogostejša robinija in visoki pajesen. Študija pomembno prispeva k razumevanju razvoja vegetacije, pomlajevanja ključnih drevesnih vrst in poškodb gozdnih tal v inicialni fazi po obsežnem požaru. Ključne besede: gozdna vegetacija, poškodbe tal, gozdni požar, drevesne vrste, pestrost vrst, invazivne rastlinske vrste, Kras, Slovenija Objavljeno v DiRROS: 21.05.2024; Ogledov: 247; Prenosov: 124
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6. ReSurveyEurope : a database of resurveyed vegetation plots in EuropeIlona Knollová, Milan Chytrý, Helge Bruelheide, Stefan Dullinger, Ute Jandt, Markus Bernhardt-Römermann, Idoia Biurrun, Francesco de Bello, Michael Glaser, Stephan M. Hennekens, Mateja Germ, Aleksandra Golob, Janez Kermavnar, Lado Kutnar, Urban Šilc, 2024, pregledni znanstveni članek Povzetek: Aims We introduce ReSurveyEurope — a new data source of resurveyed vegetation plots in Europe, compiled by a collaborative network of vegetation scientists. We describe the scope of this initiative, provide an overview of currently available data, governance, data contribution rules, and accessibility. In addition, we outline further steps, including potential research questions. Results ReSurveyEurope includes resurveyed vegetation plots from all habitats. Version 1.0 of ReSurveyEurope contains 283,135 observations (i.e., individual surveys of each plot) from 79,190 plots sampled in 449 independent resurvey projects. Of these, 62,139 (78%) are permanent plots, that is, marked in situ, or located with GPS, which allow for high spatial accuracy in resurvey. The remaining 17,051 (22%) plots are from studies in which plots from the initial survey could not be exactly relocated. Four data sets, which together account for 28,470 (36%) plots, provide only presence/absence information on plant species, while the remaining 50,720 (64%) plots contain abundance information (e.g., percentage cover or cover–abundance classes such as variants of the Braun-Blanquet scale). The oldest plots were sampled in 1911 in the Swiss Alps, while most plots were sampled between 1950 and 2020. Conclusions ReSurveyEurope is a new resource to address a wide range of research questions on fine-scale changes in European vegetation. The initiative is devoted to an inclusive and transparent governance and data usage approach, based on slightly adapted rules of the well-established European Vegetation Archive (EVA). ReSurveyEurope data are ready for use, and proposals for analyses of the data set can be submitted at any time to the coordinators. Still, further data contributions are highly welcome. Ključne besede: biodiversity, monitoring, species richness, vascular plants, vegetation dynamics Objavljeno v DiRROS: 23.04.2024; Ogledov: 270; Prenosov: 113
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7. Habitat degradation facilitates the invasion of Neophytes : a resurvey study based on permanent vegetation plots in oak forests in Slovenia (Europe)Janez Kermavnar, Lado Kutnar, 2024, izvirni znanstveni članek Povzetek: The spread of neophytes (non-native plant species) challenges the conservation status and ecological integrity of forests, especially in lowland areas. Long-term resurvey studies are needed to evaluate the temporal dynamics of neophytes in forests; however, such data are scarce. In 2023, we resampled a set of 45 permanent vegetation plots (established in 1992/93) in two forest vegetation types: oak–hornbeam forests dominated by Quercus robur and colline oak–beech forests dominated by Q. petraea. Over the last 30 years, oak forests have experienced extensive oak tree mortality, with the degree of habitat degradation being greater in Q. robur forests. In the early 1990s, only three neophytes with low abundance were recorded across all plots. In the 2023 resurvey, the total number of neophytes increased to 22 species (15 herbaceous and 7 woody species), comprising 6.9% of the total species pool in the understory layer. The increase in the plot-level number and cover of neophytes was significant in plots dominated by Q. robur but not in those with Q. petraea. The most frequent neophytes were Impatiens parviflora (present in 31% of plots), Solidago gigantea (27%), Erigeron annuus (16%) and Erechtites hieraciifolia (16%). The richness and cover of neophytes were significantly affected by the tree layer cover (negative correlation) and the degree of soil disturbance (positive correlation). All neophytes established in disturbed patches, whereas the occurrence of I. parviflora was exceptional as it was able to colonize less degraded, shaded understory environments. Habitat degradation (the mortality-induced loss of stand-forming oak trees resulting in extensive tree layer cover decrease) emerged as a key driver promoting neophyte proliferation, coupled with the impact of management-induced disturbances affecting overstory and soil conditions. The spread is expected to continue or even intensify in the future because novel light regimes and disturbances make forest habitats less resistant to neophyte proliferation. Ključne besede: long-term vegetation change, invasive non-native plants, oak mortality, Quercus robur, Quercus petraea, canopy openness, Impatiens parviflora, Slovenia Objavljeno v DiRROS: 19.04.2024; Ogledov: 239; Prenosov: 100
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8. Mixed signals of environmental change and a trend towards ecological homogenization in ground vegetation across different forest typesJanez Kermavnar, Lado Kutnar, 2024, izvirni znanstveni članek Povzetek: Forest ground vegetation may serve as an early warning system for monitoring anthropogenic global-change impacts on temperate forests. Climate warming may induce a decline of cool-adapted species to the benefit of more thermophilous plants. Nitrogen deposition has been documented to potentially result in soil eutrophication or acidification, which can increase the proportion of species with higher nutrient requirements and species impoverishment caused by competitive exclusion. Abiotic forest disturbances are changing the light conditions in the forest understorey environment. In this resurvey study, we tested the magnitude and direction of change in alpha (species richness) and beta (within-site dissimilarity) diversity and composition of forest ground vegetation in forests of different types in Slovenia over fifteen years. Using plant-derived characteristics (Ellenberg-type indicator values) and by testing a priori predictions concerning expected effects of environmental drivers, we show that the magnitude and direction of forest ground vegetation diversity and floristic changes varies greatly between forest sites. Divergent responses at different sites resulted in low net change of alpha and beta diversity and a weak overall environmental signal. The largest decrease in species number was observed in lowland oak-hornbeam forests, which were also among the sites with the greatest compositional shifts. Changes in beta diversity did not show any consistent trend, and anticipated floristic convergence was not confirmed when all sites were considered. Thermophilization was mainly detected in montane beech sites and alpine spruce forests whereas eutrophication signal was most significant on nutrient-poor sites. Vegetation responses were strongly dependent on initial site conditions. Shrinkage of ecological gradients (process of ecological homogenization) suggests that sites positioned at the ends of the gradients are losing their original ecological character and are becoming more similar to mid-gradient sites that generally exhibit smaller changes. Our results point to the importance of local stand dynamics and overstorey disturbances in explaining the temporal trends in forest ground vegetation. Ground vegetation in Slovenian forests is changing in directions also dictated by multiple regional and global change drivers. Ključne besede: vegetation resurvey, thermophilization, eutrophication, forest disturbances, alpha and beta diversity, initial site conditions, ICP-Forests network Objavljeno v DiRROS: 09.04.2024; Ogledov: 368; Prenosov: 174
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9. Ohranjanje biotske raznovrstnosti : študijska gradiva pri predmetu Ohranjanje biotske raznovrstnosti (5 vsebinskih sklopov)Lado Kutnar, 2024, drugo učno gradivo Ključne besede: biotska raznovrstnost, ohranitvena biologija, izumiranje vrst, ravni biotske raznovrstnosti, genetska pestrost, vrstna pestrost, ekosistemska in krajinska pestrost, dejavniki ogrožanja, onesnaženje okolja, invazivne tujerodne vrste, podnebne spremembe, degradacija habitatov, fragmentacija habitatov, mehanizmi ohranjanja biotske raznovrstnosti, rdeči seznam vrst, zavarovane vrste, Natura 2000, Slovenija Objavljeno v DiRROS: 03.04.2024; Ogledov: 235; Prenosov: 0 |
10. Kako podnebne spremembe in velikopovršinske motnje vplivajo na naravne ekosisteme? : učno gradivo pri predmetu Globalne spremembe in gozdni ekosistemi, BF Odd. za gozdarstvo in obnovljive gozdne vireLado Kutnar, 2024, drugo učno gradivo Ključne besede: podnebne spremembe, motnje, temperature, gozdni ekosistemi, drevesne vrste, pričakovana razporeditev gozdov, model, IPCC, ARSO, Slovenija Objavljeno v DiRROS: 03.04.2024; Ogledov: 207; Prenosov: 0 |