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Iskalni niz: "ključne besede" (stand value) .

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Does standing up enhance performance on the stroop task in healthy young adults? : a systematic review and meta-analysis
Maja Maša Šömen, Manca Peskar, Bettina Wollesen, Klaus Gramann, Uroš Marušič, 2023, pregledni znanstveni članek

Povzetek: Understanding the changes in cognitive processing that accompany changes in posture can expand our understanding of embodied cognition and open new avenues for applications in (neuro)ergonomics. Recent studies have challenged the question of whether standing up alters cognitive performance. An electronic database search for randomized controlled trials was performed using Academic Search Complete, CINAHL Ultimate, MEDLINE, PubMed, and Web of Science following PRISMA guidelines, PICOS framework, and standard quality assessment criteria (SQAC). We pooled data from a total of 603 healthy young adults for incongruent and 578 for congruent stimuli and Stroop effect (mean age = 24 years). Using random-effects results, no difference was found between sitting and standing for the Stroop effect (Hedges’ g = 0.13, 95% CI = −0.04 to 0.29, p = 0.134), even when comparing congruent (Hedges’ g = 0.10; 95% CI: −0.132 to 0.339; Z = 0.86; p = 0.389) and incongruent (Hedges’ g = 0.18; 95% CI: −0.072 to 0.422; Z = 1.39; p = 0.164) stimuli separately. Importantly, these results imply that changing from a seated to a standing posture in healthy young adults is unlikely to have detrimental effects on selective attention and cognitive control. To gain a full understanding of this phenomenon, further research should examine this effect in a population of healthy older adults, as well as in a population with pathology.
Ključne besede: healthy young adults, dual tasks, posture, Stroop task, cognitive-motor interference, sit-to-stand workstations
Objavljeno v DiRROS: 30.01.2023; Ogledov: 353; Prenosov: 184
.pdf Celotno besedilo (1,14 MB)
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3.
Tree and stand growth differ among soil classes in semi-natural forests in central Europe
Andrej Bončina, Matija Klopčič, Vasilije Trifković, Andrej Ficko, Primož Simončič, 2023, izvirni znanstveni članek

Povzetek: We determined the size of differences in stand and tree growth in semi-natural forests with respect to 16 reference soil groups. The forest area of Slovenia (11.8 thousand km2) was used as the study area, and reference soil units were derived from the national soil map at a 1:25,000 scale consisting of 10,781 polygons with an average size of 117.95 ha. Stand growth was defined as periodic stand basal area increment, while the growth of Norway spruce, silver fir, Scots pine, European beech and sessile oak trees was estimated by the periodic diameter increment of 238,349 dominant trees on 67,061 permanent sampling plots. A linear fixed-effects model and linear mixed-effect models were used for studying stand and tree growth in different site, stand and tree conditions. The soil unit was the dummy variable with Dystric Cambisols set as the reference category. Soil contributed 4.3 % to the explained variability of basal area increment and 4–27 % to the explained variability of the diameter increment of the five tree species. Soil was a stronger driver of stand and tree growth than climate or topography. Stand and tree species production rate on soil units was in the interval of −28 % to +5 % and −47 % to +14 % of that on the reference soil unit, respectively. Stand growth was the highest on Eutric Gleysols and the lowest on Histosols, and tree species generally exhibited the highest and the lowest growth rates on different soil units. We suggest that soil should be considered in growth models and studied interrelatedly with climatic, site and stand variables.
Ključne besede: reference soil groups, FAO soil unit, natural forest, stand growth, tree growth
Objavljeno v DiRROS: 29.12.2022; Ogledov: 545; Prenosov: 259
.pdf Celotno besedilo (2,23 MB)
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4.
The influence of abiotic and biotic disturbances on the protective effect of alpine forests against avalanches and rockfalls
Domen Oven, Barbara Žabota, Milan Kobal, 2020, pregledni znanstveni članek

Povzetek: Abiotic and biotic disturbances in alpine forests can reduce forest cover or change the structure of the forest and consequently reduce the protective effect of forest against natural hazards such as avalanches and rockfalls. In this review article, the effect of the main abiotic (forest fire, windthrow, ice break, snow break, avalanche and rockfall) and biotic (insects and pathogens) disturbances in protection forests are presented along with their potential influence on the protective effect of forest against avalanches and rockfalls. In general, natural disturbances negatively affect the protective effect of forest, especially in the case of large-scale and severe events, which in alpine areas are mostly caused by storms, bark beetle outbreaks, avalanches and forest fires. Climate change induced interactions between disturbances are expected to present challenges in the management of protection forests in the future.
Ključne besede: natural disturbances, natural hazards, abiotic disturbances, biotic disturbances, protection forests, protective effect, stand parameters, rockfall, avalanche
Objavljeno v DiRROS: 01.04.2020; Ogledov: 4128; Prenosov: 3250
.pdf Celotno besedilo (893,89 KB)

5.
Root-associated fungal communities from two phenologically contrasting Silver Fir (Abies alba Mill.) groups of trees
Tina Unuk Nahberger, Tijana Martinović, Domen Finžgar, Nataša Šibanc, Tine Grebenc, Hojka Kraigher, 2019, izvirni znanstveni članek

Povzetek: Root-associated fungal communities are important components in ecosystem processes, impacting plant growth and vigor by influencing the quality, direction, and flow of nutrients and water between plants and fungi. Linkages of plant phenological characteristics with belowground root-associated fungal communities have rarely been investigated, and thus our aim was to search for an interplay between contrasting phenology of host ectomycorrhizal trees from the same location and root-associated fungal communities (ectomycorrhizal, endophytic, saprotrophic and pathogenic rootassociated fungi) in young and in adult silver fir trees. The study was performed in a managed silver fir forest site. Twenty-four soil samples collected under two phenologically contrasting silver fir groups were analyzed for differences in rootassociated fungal communities using Illumina sequencing of a total root-associated fungal community. Significant differences in beta diversity and in mean alpha diversity were confirmed for overall community of ectomycorrhizal root-associated fungi, whereas for ecologically different non-ectomycorrhizal root-associated fungal communities the differences were significant only for beta diversity and not for mean alpha diversity. At genus level root-associated fungal communities differed significantly between early and late flushing young and adult silver fir trees. We discuss the interactions through which the phenology of host plants either drives or is driven by the root-associated fungal communities in conditions of a sustainably co-naturally managed silver fir forest.
Ključne besede: host phenology, stand age, root-associated fungi, silver fir, fungal community
Objavljeno v DiRROS: 20.02.2020; Ogledov: 1924; Prenosov: 1380
.docx Celotno besedilo (663,43 KB)
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6.
Structure, development and growth of selection forests at the Granata research site
Matej Reščič, Andrej Bončina, 2007, izvirni znanstveni članek

Povzetek: The Granata research site was established for the study of structure, growth and regeneration of silver fir-European beech single stem selection forest. Three phytocoenological relevés were carried out, all trees ?5 cm diameter at breast height (d.b.h.) were measured by full callipering, tree growth was analysed for sample trees, regeneration of tree species was registered on 63 sampling plots. In addition, historical data from past forest inventories werestudied. In the period from 1952 to 2003, the share of silver fir has decreased from 86% to 26%, the share of Norway spruce increased significantly,whereas the share of beech and sycamore has slightly increased. The current growing stock amounts to 350 m3 ha-1, with large-size diameter trees (d.b.h. ?50 cm) representing 51% of total growing stock. The site is divided into 16 stand patches with significant differences in tree species composition and diameter distribution. Regeneration is sufficient with silver fir prevailing in total number of seedlings (42%). 23% of all seedlings are damaged as a result of game browsing.
Ključne besede: selection forest, plenterwald, selection system management, stand structure, tree species composition, regeneration, diameter distribution
Objavljeno v DiRROS: 12.07.2017; Ogledov: 4704; Prenosov: 2018
.pdf Celotno besedilo (558,46 KB)

7.
Silver fir (Abies alba Mill.) distribution in Slovenian forests
Andrej Ficko, Andrej Bončina, 2006, izvirni znanstveni članek

Povzetek: We analysed the characteristics of silver fir (Abies alba Mill.) occurrence and distribution in Slovenia using databases of the Slovenian Forest Service (SFS). Silver fir is the third most widely distributed tree species in Slovenia, occurring in approximately 40 % of total forest area, but abundantly in less than 10 %. Its share in total growing stock varies between separate forest management regions. It is more abundant in the Dinaric and part of the Pre-alpine phytogeographic regions. The highest share in total growing stock reaches at altitudes between 800 m and 1000 m above sea level, forests with silver fir cover the most extensive surface in the altitude belt from 1000 to 1200 m. Silver fir occurs abundantly in 11 syntaxes. Between them, silver fir-beech forests (Abieti-Fagetum dinaricum TREG. 57, syn.: Omphalodo-Fagetum (TREG.57 corr. PUNC.80) MAR et al. 93) strongly prevail, followed by fir forests with fern (Dryopterido-Abietetum KOŠ.65, syn.: Galio rotundifolii-Abietetum BARTSCH.40). Silver fir diameter distribution considerably varies between separate forest management regions. The regions with the highest share of silver fir (Postojna, Kočevje) dominate also in having large diameter silver fir trees, whereas in other regions (e.g. Nazarje, Kranj, Maribor) small diameter silver fir trees are prevalent. Ddevelopmental stage structure shows that in forest stands with silver fir there is a higher share of timber phase, stands in regeneration, youth stands and selective forests. Considering regeneration we can conclude, that more intensive decreasing trend in silver fir share is expected in the Ddinaric phytogeographic region than in northern parts of Slovenia. Successful regeneration due to lower red deer population and balanced stem diameter structure with higher proportion of small diameter trees promise easier conservation of silver fir in northern parts.
Ključne besede: forest stand structure, forest vegetation, altitude, Slovenia
Objavljeno v DiRROS: 12.07.2017; Ogledov: 4321; Prenosov: 1728
.pdf Celotno besedilo (2,09 MB)

8.
Factors influencing growth of mature sycamore trees (Acer pseudoplatanus L.) on carbonate bedrock
Aleš Kadunc, Marijan Kotar, 2005, izvirni znanstveni članek

Povzetek: This paper presents the growth potential of sycamore (Acer pseudoplatanus L.) on four types of forest sites located on carbonate bedrock. The research covers sycamore sites (Aceri-Fraxinetum ill.), beech sites (Lamio orvalae-Fagetum), beech sites planted with Norway spruce, and silver fir-beechsites (Omphalodo-Fagetum aceretosum). The analyses for each forest type were carried out on five plots. Our aim was to determine the effect of site factors and stand parameters on sycamore growth. Site productivity (SP) is positively correlated with soil depth, coarse silt percentage in the cambichorizon, the content of phosphorus in leaves and, partly, with potassium. The effect of nitrogen supply on height growth or SP was not confirmed. Furthermore, height growth on sites with a higher rate of nutrient cycling, higher macronutrient supply and higher sand percentage in the cambic horizon is significantly faster. As to the growth of basal area, in addition to positive dependences of crown size, many other correlations with site factors were confirmed.
Ključne besede: beech stand, growing stock, stand value, current volume increment, current value increment, quality structure, social collective
Objavljeno v DiRROS: 12.07.2017; Ogledov: 4387; Prenosov: 1804
.pdf Celotno besedilo (185,52 KB)

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