1. New community of sycamore maple in northwestern Slovenia (Aconito paniculati-Aceretum pseudoplatanii ass. nov.)Igor Dakskobler, 2026, izvirni znanstveni članek Povzetek: We compared and analyzed a large number of relevés of montane-subalpine maple forests in northwestern and western Slovenia, and classified most of them into the association Lamio orvalae-Aceretum pseudoplatani. Several relevés from the Julian Alps, which we made on debris slopes (talus) and rockfall at elevations between 940 m and 1540 m, stood out and we classified them into the new association Aconito paniculati-Aceretum pseudoplatani (suballiance Lamio orvalae-Acerenion pseudoplatani, alliance Tilio-Acerion). In terms of species composition (but not in terms of its sites), its stands highly resemble the stands of the upper montane-subalpine beech-maple association Aconito paniculati-Fagetum sylvaticae(suballiance Saxifrago rotundifolii-Fagenion sylvaticae, alliance Aremonio-Fagion). The stands of both plant communities may be syndynamically connected. The article also discusses pioneer sycamore maple stands on former fields, pastures or hay meadows in the foothills of the southern Julian Alps and the Trnovo Forest Plateau, which are classified into the (for the time being) provisionally described new association Senecio fuchsii-Aceretum pseudoplatani nom. prov.
Ključne besede: phytosociology, synsystematics, Tilio-Acerion, secondary succession, Triglav National Park, Natura 2000
Objavljeno v DiRROS: 13.08.2026; Ogledov: 54; Prenosov: 36
 Celotno besedilo (20,52 MB)
Gradivo ima več datotek! Več... |
2. Developing National Forest Inventory-based indicators for monitoring minority ravine forestsAnže Martin Pintar, Janez Kermavnar, Luka Krajnc, Gal Kušar, Lado Kutnar, 2026, izvirni znanstveni članek Povzetek: Ravine forests represent a priority habitat type of the European Natura 2000 network for which empirical data are limited, particularly regarding the influence of stand structure on biodiversity. Assessment of forest habitats can largely be supported by National Forest Inventory (NFI) data, which enable frequent and spatially dense monitoring of the stand conditions and potential vulnerability of forest habitat types. In this study, we established an independent, nationwide classification system of close-to-nature managed ravine forests dominated by different characteristic broadleaf trees, based on stratifying NFI data into homogeneous subtypes. On the basis of tree species composition, which is a basic component in forest habitat types, we identified three subtypes of ravine forests, dominated by Acer pseudoplatanus, Fraxinus excelsior, and Tilia spp. We examined these subtypes using structural, compositional, deadwood, and diversity-related indicators. The Tilia-dominated subtype was more common in the lower altitudinal belt (≤ 502 m), while the Acer-dominated subtype was more prominent in the higher belt (> 502 m). The Acer-dominated subtype predominated in stands with SDI lower than 432, while the Tilia-dominated subtype was relatively more common in stands with higher SDI. In stands with Evenness values lower than 0.3, the Acer-dominated subtype predominated, while in stands with higher Evenness index values, the Fraxinus-dominated subtype was more common. In the Fraxinus-dominated subtype, the volume of standing dead trees was statistically significantly higher than in the other two subtypes (14 m3 /ha compared to 8 m3 /ha) due to the high mortality rate of trees caused by ash dieback. In all three subtypes of ravine forests, we observed a lack of natural regeneration of key tree species, which is crucial for maintaining the favorable conservation status of the habitat type. The observed ranges of structural and compositional attributes, deadwood components, and diversity indices provide empirical reference conditions that reflect the current nationwide variability of ravine forests.
Ključne besede: National Forest Inventory, Tilio-Acerion, characteristic broadleaf trees, forest composition, forest structure, deadwood biomass
Objavljeno v DiRROS: 08.04.2026; Ogledov: 331; Prenosov: 263
Celotno besedilo (5,68 MB)
Gradivo ima več datotek! Več... |
3. Factors supporting a high level of understorey plant diversity in ravine forests (EU priority habitat type)Lado Kutner, Anže Martin Pintar, Aleksander Marinšek, Janez Kermavnar, 2026, izvirni znanstveni članek Povzetek: In addition to being influenced by global drivers, forest herb-layer communities are also shaped by various local factors, such as topography, stand characteristics and soil properties. The responses of ground vegetation were studied in the ravine forests of a Natura 2000 site in eastern Slovenia. A high species richness of 218 plant species was observed in the herb layer, including some woody species. On average, 52.8 different plant species were recorded per plot. Species richness was significantly associated with topographic and forest stand factors, rather than soil characteristics. It was positively associated with altitude and the amount of deadwood and negatively associated with tree height. However, the main predictors for the species composition of the ground vegetation were tree layer cover and soil pH. Among the studied ravine forests, Tilia-dominated stands are characterised by the highest species diversity and the lowest herb-layer cover, indicating a composition of less competitive, site-specific species inhabiting sites with high resource heterogeneity and diverse microhabitats. To preserve the high level of biodiversity of heterogeneous ravine forests and to maintain their favourable conservation status, it is crucial to sustain the natural state of forest soils and stands by implementing appropriate management measures. Such measures may include close-to-nature forest management, which is already being implemented in the studied ravine forests.
Ključne besede: ravine forests, ground vegetation, herb layer, forest stands, topography, soil, Tilio–Acerion, Slovenia
Objavljeno v DiRROS: 23.03.2026; Ogledov: 340; Prenosov: 304
Celotno besedilo (2,91 MB)
Gradivo ima več datotek! Več... |
