1. 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, original scientific article Abstract: 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. Keywords: long-term vegetation change, invasive non-native plants, oak mortality, Quercus robur, Quercus petraea, canopy openness, Impatiens parviflora, Slovenia Published in DiRROS: 19.04.2024; Views: 73; Downloads: 30 Full text (4,46 MB) This document has many files! More... |
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3. Poročilo o preskusu št.: LVG 2024-010 : vzorec št. 2024/00044Nikica Ogris, Maarten De Groot, 2024, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, graden, Quercus petraea, sušenje, hiranje, kompleksna bolezen Published in DiRROS: 13.02.2024; Views: 160; Downloads: 43 Full text (1,12 MB) |
4. Tehnične smernice za ohranjanje in rabo genskih virov : hrasti = Quercus spp.Hojka Kraigher, Mojca Bogovič, Marjana Westergren, 2010, professional article Keywords: genski viri, drevesne vrste, tehnične smernice, hrast, Quercus spp., Slovenija Published in DiRROS: 12.12.2023; Views: 235; Downloads: 49 Full text (3,49 MB) |
5. Tehnične smernice za ohranjanje in rabo genskih virov : dob in graden = Quercus robur/Quercus petraeaAlexis Ducousso, Sandor Bordacs, 2010, professional article Keywords: genski viri, drevesne vrste, tehnične smernice, dob, Quercus robur L., graden, Quercus petraea (Matt.) Liebl. Published in DiRROS: 12.12.2023; Views: 261; Downloads: 62 Full text (2,04 MB) |
6. Podatki in strokovno mnenje k poročilu o preskusu št.: LVG 2023-106Nikica Ogris, Tine Hauptman, Barbara Piškur, 2023, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, graden, Quercus petrae, lipa, Tilia platyphyllos, domači kostanj, Castanea stativa, hrastov strženar, Platypus cylindrus, navadno ohmelje, Loranthus europaeus, hrastov kozliček, deformacija rasti, zastrupitev rastlin, kostanjev rak, Cryphonectria parasitica, antropogeni škodljiv dejavnik Published in DiRROS: 12.09.2023; Views: 248; Downloads: 0 |
7. Poročilo o preskusu št.: LVG 2023-106 : vzorec št. 2023/00479Barbara Piškur, Tine Hauptman, Špela Hočevar, Nikica Ogris, 2023, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, graden, Quercus petrae, lipa, Tilia platyphyllos, domači kostanj, Castanea stativa, hrastov strženar, Platypus cylindrus, navadno ohmelje, Loranthus europaeus, hrastov kozliček, deformacija rasti, zastrupitev rastlin, kostanjev rak, Cryphonectria parasitica, antropogeni škodljiv dejavnik Published in DiRROS: 12.09.2023; Views: 255; Downloads: 0 |
8. Izbor drevesnih vrst z največjim neizkoriščenim potencialom uporabnosti lesa v luči podnebnega segrevanja in prihodnjih sprememb vrstne sestave slovenskih gozdov : Projekt REWINNUSE: Izroček št. 1.2.1Luka Krajnc, Polona Hafner, Jožica Gričar, 2022, treatise, preliminary study, study Keywords: kakovost lesa, perspektivne drevesne vrste, Quercus cerris, cer, Robinia pseudoacacia, navadna robinija, Populus sp., topol, Pinus nigra, črni bor, Pseudotsuga menziesii, navadna ameriška duglazija, Castanea sativa, pravi kostanj Published in DiRROS: 27.03.2023; Views: 509; Downloads: 117 Full text (348,31 KB) |
9. Poročilo o preskusu št.: LVG 2022-181 : vzorec št. 2022/00449Barbara Piškur, Maša Zagorac, Zina Devetak, Ana Brglez, Nikica Ogris, 2022, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, vrbolistni hrast, Quercus phellos, Botryosphaeria dothidea, Discula quercina, Apiognomonia errabunda, sušni stres, sušenje drevesa Published in DiRROS: 24.10.2022; Views: 400; Downloads: 0 |
10. Pomen analize dominantnih dreves za gozdnogospodarsko načrtovanje na primeru kisloljubnega bukovja z rebrenjačoAndrej Bončina, 2022, original scientific article Abstract: Poznavanje razvoja dominantnega drevja je pomembno za spremljavo razvoja enomernih sestojev, določanje režima redčenj, ciljnih premerov drevesnih vrst in optimalnega razmerja razvojnih faz ter ocenjevanje produkcijske sposobnosti gozdnih rastišč. S podatki stalnih vzorčnih ploskev smo analizirali debelinsko in višinsko rast dominantnih dreves petih drevesnih vrst kisloljubnega bukovja z rebrenjačo (smreka, bukev, graden, rdeči bor in kostanj). Za vrste smo ocenili rastiščni produkcijski indeks (SPI), ki je dominanta višina drevja pri prsnem premeru 45 cm, rastiščni indeks (SI) in prikazali postopek določanja optimalnega razmerja razvojnih faz glede na drevesno sestavo sestojev ter odločitev o ciljnih premerih drevja in pomlajevanju sestojev. Vrednosti SPI za bukev, smreko, graden, rdeči bor in kostanj so 28,4; 31,1; 25,1; 26,1 in 23,2, vrednosti SI pa 27,9; 32,5; 20,9; 22,9 in 21,7. Optimalni deleži razvojnih faz so odvisni od izbrane drevesne sestave gozdov ter odločitev glede ciljnih premerov in pomlajevanja sestojev. Model debelinskega priraščanja bukve kaže, da na njeno debelinsko rast pozitivno vplivajo prsni premer, produktivnost rastišča in raznomernost sestojev, negativno pa delež bukve v sestoju, sestojna temeljnica in naklon terena. Keywords: višinska rast, debelinska rast, rastiščni indeks, rastiščni produkcijski indeks, Fagus sylvatica, Picea abies, Quercus petraea, Pinus sylvestris, Castanea sativa Published in DiRROS: 11.08.2022; Views: 817; Downloads: 220 Full text (472,79 KB) |