481. Analiza izbranih drevesnih modelov razvoja gozdov, primernih za modeliranje na velikoprostorski ravni, in možnosti njihove uporabe v SlovenijiJernej Jevšenak, Boštjan Mali, Mitja Skudnik, 2023, original scientific article Abstract: Prispevek obravnava drevesne modele razvoja gozdov, ki so pomembno orodje pri odločanju, upravljanju in strateških odločitvah na področju gospodarjenja z gozdovi. V Sloveniji smo šele v zadnjih letih pričeli s sistematičnim razvojem področja modeliranja gozdov, ki vključuje razvoj matričnega populacijskega modela, testiranje izbranih modelov iz tujine ter razvoj posameznih komponent modelov. Namen prispevka je predstaviti področje empiričnih drevesnih modelov za modeliranje razvoja gozdov na velikoprostorski ravni. Podrobneje predstavljamo uveljavljene metode za modeliranje posameznih komponent drevesnih modelov, kot so debelinska in višinska rast, razvoj krošnje, mortaliteta ter vrast in pomlajevanje. Opravili smo presojo primernosti izbranih drevesnih modelov z vidika možnost njihove uporabe v Sloveniji. Ugotavljamo, da imajo modeli SILVA, WEHAM, MASSIMO in CALDIS največje možnosti za uporabo v Sloveniji, saj so vsi primerni za različne gozdne tipe in mešane gozdove z raznomerno zgradbo, ki prevladujejo v Sloveniji. Poleg testiranja obstoječih modelov predlagamo razvoj novih modelov, prilagojenih raznomernim in mešanim sestojem v Sloveniji. Predlagamo tudi razširitev nabora kazalnikov pri gozdnih inventurah ter dodatne meritve značilnosti dreves, npr. lastnosti krošenj, ki bi razširile možnosti modeliranja razvoja gozdov v Sloveniji. V zaključkih razpravljamo tudi o možnosti uporabe strojnega učenja na področju modeliranja razvoja gozdov, saj bi tovrstni modeli lahko predstavljali naslednjo generacijo modelov.
Keywords: modeliranje, razvoj gozda, velikoprostorska gozdna inventura, stalne vzorčne ploskve, simulator razvoja gozdov, napovedovanje, gozdarska politika
Published in DiRROS: 27.06.2023; Views: 1198; Downloads: 581
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482. Causes and consequences of large-scale windthrow on the development of fir-beech forests in the Dinaric mountainsMatjaž Čater, Ajša Alagić, Mitja Ferlan, Jernej Jevšenak, Aleksander Marinšek, 2023, original scientific article Abstract: We investigated several aspects of windthrow that are relevant to our understanding and management of forest ecosystems. As an example, we used an extreme event in December 2017, when the strongest storm in recent history occurred in the Slovenian Dinaric High Karst. We examined influential factors such as soil properties, wind speed, precipitation and ecological consequences for the affected forests. Soil properties were measured around standing and fallen silver fir trees at all three research sites. Tree species composition in the regeneration was observed on plots with chemical and acoustic ungulate deterrents and on control plots without deterrents. Economic estimates of yield loss due to damage were calculated at the national level. A model of the potential threat from windthrow was also developed based on data collected from windthrow events and meteorological data over the past 20 years. Our results indicate that soil depth and mineral fraction depth were similar at sites with and without damaged trees and were not the determining factors for tree toppling. Plots with acoustic deterrents showed the most effective regeneration development, the least decline in silver fir and the greatest increase in noble hardwood seedlings, while plots with chemical deterrents showed the least browsing damage. The estimated economic loss of €16.1 million is 6.6% less than the harvest under normal conditions. The economic loss was relatively low due to the nature of the storm, with the predominant type of damage being uprooted trees with no damaged trunks. The windthrow hazard model revealed that a large number of consecutive events with strong winds in each section weakened the stand, which was subsequently knocked down during the next extreme wind and rainfall event.
Keywords: natural forest regeneration, windthrow, economic loss, browsing, ungulate deterrents, forest soil properties, potential threat model
Published in DiRROS: 27.06.2023; Views: 1143; Downloads: 533
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483. Phytosociological description of the dwarf mountain pine shrub community (Amelanchiero ovalis-Pinetum mugo) in the valleys of the Slovenian AlpsIgor Dakskobler, Mateja Cojzer, Andrej Rozman, 2023, original scientific article Abstract: We have expanded our knowledge of the localities, sites and distribution of the Amelanchiero ovalis-Pinetum mugo association in the Slovenian Alps. Based on phytocenological analyses, the shrub association belonging to the forest vegetation type Alpine mountain pine scrub was divided into two subassociations: peucedanetosum oreoselini and hylocomiadelphetosum triquetri. We also described four variants within the latter association.
Keywords: phytosociology, synsystematics, Pinus mugo, Natura 2000, Triglav National Park, Topla Landscape Park, Slovenia
Published in DiRROS: 27.06.2023; Views: 1125; Downloads: 501
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484. Poročilo o preskusu št.: LVG 2023-040 : vzorec št. 2023/00151Maarten De Groot, Zina Devetak, Špela Jagodic, Barbara Piškur, 2023, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, Fusarium circinatum, borov smolasti rak, Pinus, bor
Published in DiRROS: 21.06.2023; Views: 271; Downloads: 0 |
485. Poročilo o preskusu št.: LVG 2023-038 : vzorec št. 2023/00179Ana Brglez, Zina Devetak, Barbara Piškur, 2023, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, Fusarium circinatum, borov smolasti rak, Pinus, bor
Published in DiRROS: 20.06.2023; Views: 299; Downloads: 0 |
486. Poročilo o preskusu št.: LVG 2023-037 : vzorec št. 2023/00176Nikica Ogris, Maarten De Groot, 2023, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, bela jelka, Abies alba, jelov vejni lubadar, Pityophthorus pityographus, sušni stres, poškodba zaradi toče, duglazija, Pseudotsuga menziesii, sajasti osip duglazije, Nothophaeocryptopus gaeumannii, merijski osip duglazije, Rhabdocline parkeri
Published in DiRROS: 20.06.2023; Views: 365; Downloads: 88
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488. Poročilo o preskusu št.: LVG 2023-034 : vzorec št. 2023/00134Ana Brglez, Zina Devetak, Barbara Piškur, 2023, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, Fusarium circinatum, borov smolasti rak, rdeči bor, Pinus sylvestris
Published in DiRROS: 15.06.2023; Views: 338; Downloads: 0 |
489. Poročilo o preskusu št.: LVG 2023-033 : vzorec št. 2023/00133Nikica Ogris, 2023, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, navadna bukev, Fagus sylvatica, sadike, gozdni reprodukcijski material, sušni stres
Published in DiRROS: 12.06.2023; Views: 320; Downloads: 82
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490. Verifikacijsko poročilo - LVG POS 021Zina Devetak, 2023, treatise, preliminary study, study Keywords: Ceratocystis platani, platanov obarvani rak, diagnostični protokol, molekularna analiza, ekstrakcija DNA, PCR v realnem času, verifikacija
Published in DiRROS: 07.06.2023; Views: 327; Downloads: 0 |
