1. Proximity to riverbed influences physiological response of adult pedunculate oak treesLazar Kesić, Matjaž Čater, Saša Orlović, Bratislav Matović, Marko Stojanović, Mirjana Bojović, 2023, izvirni znanstveni članek Povzetek: The pedunculate oak (Quercus robur L.) is economically and ecologically one of the most significant tree species in Serbia, however, little is known about the influence of the riverbed distance and its water supply on ecophysiological responses of this species. Given the limited information on the light-response curve of photosynthesis for oaks in southwest Srem, Serbia, the aim of this paper is to enhance understanding of their ecophysiological responses in this context. Maximum assimilation rate (Amax), the quantum yield (Ф), and light compensation point (LCP) were compared in adult trees situated along the transect from the river: (1) close to the river, (2) intermediate, (3) farthest from the river, and (4) forest reserve (second closest), with the first three transects being managed forests and the last one being an unmanaged forest reserve. The measurements were conducted in July during the first evidence of drought. The highest Amax rates were measured in all light intensities on the site closest to the river and the smallest on the site that was most distant to the water source. The most efficient were trees close to the river and the ones in the forest reserve. No significant difference between compensation points was confirmed for the studied groups of trees, although the forest reserve trees showed slightly higher values. The results demonstrated clear response between transects, which followed the distance from the riverbed. Pedunculate oak's reliance on groundwater is in tight relation with ecophysiological processes in trees; groundwater depletion may threaten its survival in areas distant from the river.
Ključne besede: Quercus robur L., floodplain forest, drought, light-response curves, transects
Objavljeno v DiRROS: 05.06.2024; Ogledov: 177; Prenosov: 39
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2. Poročilo o preskusu št.: LVG 2024-038 : vzorec št. 2024/00049Tine Hauptman, Špela Hočevar, Barbara Piškur, 2024, izvedensko mnenje, arbitražna odločba Ključne besede: varstvo gozdov, morfološke analize, Quercus ilex, sadike, šibki patogeni, molekularne analize, javna gozdarska služba
Objavljeno v DiRROS: 23.05.2024; Ogledov: 86; Prenosov: 74
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3. Poročilo o preskusu št.: LVG 2024-022 : vzorec št. 2024/00043/THTine Hauptman, Špela Hočevar, Barbara Piškur, 2024, izvedensko mnenje, arbitražna odločba Ključne besede: varstvo gozdov, morfološke analize, Quercus petraea, Fusarium sp., Tolypocladium sp., molekularne analize, javna gozdarska služba
Objavljeno v DiRROS: 23.05.2024; Ogledov: 70; Prenosov: 69
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4. 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: 168; Prenosov: 67
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6. Poročilo o preskusu št.: LVG 2024-010 : vzorec št. 2024/00044Nikica Ogris, Maarten De Groot, 2024, izvedensko mnenje, arbitražna odločba Ključne besede: varstvo gozdov, morfološke analize, graden, Quercus petraea, sušenje, hiranje, kompleksna bolezen
Objavljeno v DiRROS: 13.02.2024; Ogledov: 204; Prenosov: 57
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7. Tehnične smernice za ohranjanje in rabo genskih virov : hrasti = Quercus spp.Hojka Kraigher, Mojca Bogovič, Marjana Westergren, 2010, strokovni članek Ključne besede: genski viri, drevesne vrste, tehnične smernice, hrast, Quercus spp., Slovenija
Objavljeno v DiRROS: 12.12.2023; Ogledov: 346; Prenosov: 56
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8. Tehnične smernice za ohranjanje in rabo genskih virov : dob in graden = Quercus robur/Quercus petraeaAlexis Ducousso, Sandor Bordacs, 2010, strokovni članek Ključne besede: genski viri, drevesne vrste, tehnične smernice, dob, Quercus robur L., graden, Quercus petraea (Matt.) Liebl.
Objavljeno v DiRROS: 12.12.2023; Ogledov: 318; Prenosov: 84
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9. Podatki in strokovno mnenje k poročilu o preskusu št.: LVG 2023-106Nikica Ogris, Tine Hauptman, Barbara Piškur, 2023, izvedensko mnenje, arbitražna odločba Ključne besede: 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
Objavljeno v DiRROS: 12.09.2023; Ogledov: 309; Prenosov: 0 |
10. Poročilo o preskusu št.: LVG 2023-106 : vzorec št. 2023/00479Barbara Piškur, Tine Hauptman, Špela Hočevar, Nikica Ogris, 2023, izvedensko mnenje, arbitražna odločba Ključne besede: 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
Objavljeno v DiRROS: 12.09.2023; Ogledov: 312; Prenosov: 0 |
