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Iskalni niz: "polno besedilo" AND "organizacija" (Gozdarski inštitut Slovenije) .

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1.
Xylogenesis reveals the genesis and ecological signal of IADFs in Pinus pinea L. and Arbutus unedo L.
Angela Balzano, Katarina Čufar, Giovanna Battipaglia, Maks Merela, Peter Prislan, Giovanna Aronne, Veronica De Micco, 2018

Povzetek: Background and Aims: Mediterranean trees have patterns of cambial activity with one or more pauses per year, leading to intra-annual density fluctuations (IADFs) in tree rings. We analysed xylogenesis (January 2015 - January 2016) in Pinus pinea L. and Arbutus unedo L., co-occurring at a site on Mt. Vesuvius (southern Italy), to identify the cambial productivity and timing of IADF formation. Methods: Dendrochronological methods and quantitative wood anatomy were applied and enabled IADF identification and classification. Key Results: We showed that cambium in P. pinea was productive throughout the calendar year. From January to March 2015, post-cambial (enlarging) earlywood-like tracheids were observed, which were similar to transition tracheids. The beginning of the tree ring was therefore not marked by a sharp boundary between latewood of the previous year and the new xylem produced. True earlywood tracheids were formed in April. L-IADFs were formed in autumn, with earlywood-like cells in latewood. In A. unedo, a double pause in cell production was observed, in summer and winter, leading to L-IADFs in autumn as well. Moreover, the formation of more than one IADF was observed in A. unedo.
Ključne besede: kambijeva aktivnost, funkcionalni znaki v lesu, gostotne variacije v branikah, Pinus pinea L., Arbutus unedo L., ksilogeneza, branike, cambial activity, functional wood traits, intra-annual density fluctuations, xylogenesis, tree rings
DiRROS - Objavljeno: 20.02.2020; Ogledov: 13; Prenosov: 4
URL Celotno besedilo (0,00 KB)

2.
Vrednotenje bibliografske storitve z vidika raziskovalne dejavnosti : pomen in vpliv vodenja bibliografije raziskovalcev za knjižničarje v slovenskih raziskovalnih knjižnicah
Maja Peteh, Primož Južnič, 2018

Povzetek: Namen: Svetovanje uporabnikom pridobiva vedno večji pomen v celotnem obsegu knjižničnih storitev. Svetovanje raziskovalcem od knjižničarja zahteva poglobljena bibliometrijska znanja, predvsem v visokošolskih in specialnih knjižnicah. Knjižničar bibliograf v slovenskem prostoru vnaša bibliografske zapise v sistem COBISS in ima s tem vpogled v objave raziskovalcev svoje institucije. V prvem delu prispevka so raziskana znanja, ki jih knjižničarji bibliografi pridobijo z vodenjem bibliografij raziskovalcev, in njihov vpliv na vzajemni odnos bibliotekar - raziskovalec. Drugi del raziskave obravnava vprašanje, koliko časa potrebujejo za katalogizacijo posameznih bibliografskih enot. Metodologija/pristop: Rezultati raziskave so kombinacija uporabe metode spletnega vprašalnika za visokošolske in specialne knjižničarje o njihovem delu (n = 113) in zabeležk 10 knjižničarjev bibliografov o času, potrebnem za izdelavo bibliografskega zapisa za potrebe bibliografij (n = 401 zapis). Rezultati: Za večino knjižničarjev bibliografov vodenje bibliografij ni primarna delovna obveznost. Za kakovostno opravljanje tega dela so nujna različna znanja in raznovrstni načini pridobivanja dodatnih informacij in mnenj, ki jih knjižničarji bibliografi dobijo v pravilnikih in pri kolegih. Zaradi narave bibliografskega dela spoznavajo raziskovalna področja ustanove in raziskovalcev z druge perspektive in razvijajo osebni stik z raziskovalci. V prispevku je prikazan povprečen čas izdelave bibliografskega zapisa glede na vrsto gradiva. Omejitve raziskave: Zaradi posebnosti slovenskega knjižničnega sistema, ki povezuje vzajemni katalog in informacijski sistem o raziskovalni dejavnosti (SICRIS), so rezultati uporabni le v slovenskem kontekstu. Analiza vrednotenja bibliografske storitve je nakazala, da bi bilo treba opraviti še intervjuje s knjižničarji bibliografi in raziskovalci, ki bi lahko pomembno dopolnili rezultate raziskave. Izvirnost/uporabnost raziskave: Knjižničarji bibliografi s svojim delom pridobijo vpogled v objave raziskovalcev institucije. Raziskava poudarja pomen spoznanj (predvsem vpogled v produkcijo raziskovalcev), ki jih knjižničar bibliograf pridobi z vodenjem bibliografij in jih lahko kakovostno uporabi pri svetovanju raziskovalcem na drugih področjih. Raziskava kaže na potrebo po zavestnem sodelovanju knjižničarjev bibliografov in raziskovalcev. Knjižničar bibliograf je zakladnica informacij za raziskovalce lastne ustanove in področja delovanja ustanove. Morebitna zunanja izvedba te storitve (t. i. outsourcing) bi pomenila manj kakovostno knjižnično informacijsko storitev.
Ključne besede: visokošolske knjižnice, specialne knjižnice, bibliografske storitve, katalogizacija, bibliografije raziskovalcev, bibliografi
DiRROS - Objavljeno: 20.02.2020; Ogledov: 11; Prenosov: 1
URL Celotno besedilo (0,00 KB)

3.
Urban forest research in the Mediterranean : a systematic review
Silvija Krajter Ostoić, Fabio Salbitano, Simone Borelli, Andrej Verlič, 2018

Povzetek: The Mediterranean region is facing many challenges, some of which can be addressed by nature-based solutions such as urban forests and green space. However, at best, urban forest research from Mediterranean countries has been only briefly addressed in review papers up to date. This Scopus-based review paper provides first insights into the development of urban forest research in the Mediterranean in the 20-year period from 1996 to 2015. The purpose of the review was to a) analyse distribution of urban forest research in the Mediterranean and identify countries that are forerunners based on the number of publications, b) to analyse distribution of research themes across the Mediterranean and per country, and hence point to research gaps and needs. Researchers from Italy, Turkey and Spain were the most productive in the analysed period. Research is mainly concentrated in the North, while it is scarce to non-existent in South and Eastern Mediterranean countries (excluding Turkey and Greece). Papers dealing with pollution, human health and sociocultural values were the most frequent. Some countries exhibited research specialisation with regard to certain themes. For instance Italian researchers mostly focused on topics related to pollution and urban forest management, the majority of Spanish papers addressed urban forests in the context of human health, while sociocultural values were the main research theme for researchers from Turkey. Papers were analysed also based on research methods, approaches and study locations. Suggested future research includes analysis of the quality of knowledge related to urban forests in the Mediterranean as well as of collaboration between researchers, research institutions and countries.
Ključne besede: research themes, Scopus, urban forestry, green space, green infrastructure, Mediterranean
DiRROS - Objavljeno: 20.02.2020; Ogledov: 12; Prenosov: 5
URL Celotno besedilo (0,00 KB)

4.
Tuber brennemanii and Tuber floridanum : two new Tuber species are among the most commonly detected ectomycorrhizal taxa within commercial pecan (Carya illinoinensis) orchards
Arthur C. Grupe II, Marcelo Aloisio Sulzbacher, Tine Grebenc, Rosanne Healy, Gregory Bonito, Matthew E. Smith, 2018

Povzetek: Truffles are sequestrate hypogeous fungi, and most form ectomycorrhizal (ECM) associations with trees. Truffles belonging to the genus Tuber (Pezizales, Ascomycota), %true truffles,% associate with diverse plant hosts, including economically important species such as pecan (Carya illinoinensis). Morphological and phylogenetic studies delimited several major lineages of Tuber, which include many cryptic and undescribed species. One of these, the Maculatum clade, is a speciose group characterized by relatively small, light-colored ascomata that have alveolate-reticulate spores. Here, we describe two new species in the Maculatum clade, Tuber brennemanii and T. floridanum (previously identified as Tuber sp. 36 and Tuber sp. 47). We delineate these two species by phylogenetic analyses of nuc ITS1-5.8S-ITS2 (= ITS) and partial 28S rDNA (= LSU), and through morphological analysis. A recent collection of T. floridanum from a pecan orchard in Brazil indicates that this species was introduced there on the roots of pecan seedlings. Systematic studies of ascomata and ECM fungal communities indicate that these species are geographically widespread and common ECM symbionts of pecans and other members of the Fagales, particularly in sites with disturbed soils and nutrient enrichment.
Ključne besede: biodiversity, mikologija, introduced species, Tuberaceae, truffles
DiRROS - Objavljeno: 20.02.2020; Ogledov: 13; Prenosov: 7
URL Celotno besedilo (0,00 KB)

5.
Tree differences in primary and secondary growth drive convergent scaling in leaf area to sapwood area across Europe
Giai Petit, Georg von Arx, Natasa Kiorapostolou, Silvia Lechthaler, Angela Luisa Prendin, Tommaso Anfodillo, Maria C. Caldeira, Jožica Gričar, Martina Lavrič, 2018

Povzetek: Trees scale leaf (AL) and xylem (AX) areas to couple leaf transpiration and carbon gain with xylem water transport. Some species are known to acclimate in AL : AX balance in response to climate conditions, but whether trees of different species acclimate in AL : AX in similar ways over their entire (continental) distributions is unknown. We analyzed the species and climate effects on the scaling of AL vs AX in branches of conifers (Pinus sylvestris, Picea abies) and broadleaved (Betula pendula, Populus tremula) sampled across a continental wide transect in Europe. Along the branch axis, AL and AX change in equal proportion (isometric scaling: b % 1) as for trees. Branches of similar length converged in the scaling of AL vs AX with an exponent of b = 0.58 across European climates irrespective of species. Branches of slow%growing trees from Northern and Southern regions preferentially allocated into new leaf rather than xylem area, with older xylem rings contributing to maintaining total xylem conductivity. In conclusion, trees in contrasting climates adjust their functional balance between water transport and leaf transpiration by maintaining biomass allocation to leaves, and adjusting their growth rate and xylem production to maintain xylem conductance.
Ključne besede: allocation, climate change, functional balance, leaf area, plantarchitecture, xylem
DiRROS - Objavljeno: 20.02.2020; Ogledov: 11; Prenosov: 3
URL Celotno besedilo (0,00 KB)

6.
Towards understanding the role of ectomycorrhizal fungi in forest phosphorus cycling : a modelling approach
Michiel F. Bortier, Enrique Andivia, José G. Genon, Tine Grebenc, Gabrielle I. Deckmyn, 2018

Povzetek: Many studies have shown the importance of ectomycorrhizal fungi (EM) in forests both for nutrient availability and for carbon (C) and nutrient cycling in the soil. Yet so far they are not incorporated in forest ecosystem growth and yield models. Recent research suggests phosphorus (P) shortage could be a major constraints to forest productivity in the future. For a realistic simulation of future forest ecosystem functioning, inclusion of detailed soil P cycling and the trees-EM interaction is necessary. We developed a full ecosystem P model that simulates P uptake by roots and EM, allocation within trees, physiological deficiency effects on C assimilation and allocation, release through litter decomposition, coupled with water, C and nitrogen (N) fluxes accounted for in the mechanistic forest stand model ANAFORE. Our results confirm the importance of incorporating EM in forest ecosystem models and suggest that the lack of incorporation of P in models may result in an under- or overestimation of forest growth. This new model has the potential of being used to assess the response of trees and/or stands to nutrient availability under different climate and management scenarios. With the current parameterization it is functional as a scientific research tool to investigate hypotheses.
Ključne besede: nutrient cycling, mechanistic model, pine forest, ectomycorrhizal fungi, phosphorus
DiRROS - Objavljeno: 20.02.2020; Ogledov: 12; Prenosov: 7
URL Celotno besedilo (0,00 KB)

7.
Toward objective assessment of the conservation status of (the Natura 2000) forest habitat types : a comparison of a qualitative and a quantitative modeling approach
Marko Kovač, Petra Grošelj, 2018

Povzetek: To halt the loss of biodiversity in natural habitats, the EU passed the Habitats Directive and established the Natura 2000 network. The network captured forest habitats and habitat types, whose conservation status must be reported under Article 17 of the Directive. Hence, the harmonization of habitat assessment methods and reporting formats are a critical issue. So far, the EU Commission and Member States have managed to design and issue reporting guidelines. However, as many of these reports are largely based on expert opinions, they tend to be biased and incomparable. To make conservation status assessments and reporting more consistent, this study evaluated a set of indicators with two decision support models. The DEX model operated with linguistic statements derived from numerical values, while the fuzzy model utilized numeric input. Both models were tested with data from Slovenia's three largest forest habitat types (FHT), namely 9110 % Luzulo-Fagetum beech forests, 91K0 % Illyrian Fagus sylvatica forests (Aremonio-Fagion) and 91L0 % Illyrian oak-hornbeam forests (Erythronio-Carpinion), provided by the Forest and Forest Ecosystem Condition Survey. The DEX model produced uniform results and defined the conservation status of all three FHTs as least favorable. Conversely, the fuzzy model produced three different conservation status grades for the FHTs: a favorable conservation status for the 91K0 FHT, least favorable for the 9110 FHT and unfavorable for the 91L0 FHT. Its results were logical and in accord with the existing assessments. The study showed that both models could be used for the evaluation of FHT traits. However, because of its larger sensitivity, the fuzzy model allowed detecting subtle differences among the indicator values due to the use of continuous numerical data and more sophisticated mathematical procedures.
Ključne besede: biodiversity, decision-making models, dex, fuzzy logic, inference rules, forest habitats
DiRROS - Objavljeno: 20.02.2020; Ogledov: 13; Prenosov: 7
URL Celotno besedilo (0,00 KB)

8.
The interplay between forest management practices, genetic monitoring, and other long-term monitoring systems
Darius Kavaliauskas, Barbara Fussi, Marjana Westergren, Filipos Aravanopoulos, Domen Finžgar, Roland Baier, Paraskevi Alizoti, Gregor Božič, Evangelia V. Avramidou, Monika Konnert, Hojka Kraigher, 2018

Povzetek: The conservation and sustainable use of forests and forest genetic resources (FGR) is a challenging task for scientists and foresters. Forest management practices can affect diversity on various levels: genetic, species, and ecosystem. Understanding past natural disturbance dynamics and their level of dependence on human disturbances and management practices is essential for the conservation and management of FGR, especially in the light of climate change. In this review, forest management practices and their impact on genetic composition are reviewed, synthesized, and interpreted in the light of existing national and international forest monitoring schemes and concepts from various European projects. There is a clear need and mandate for forest genetic monitoring (FGM), while the requirements thereof lack complementarity with existing forest monitoring. Due to certain obstacles (e.g., the lack of unified FGM implementation procedures across the countries, high implementation costs, large number of indicators and verifiers for FGM proposed in the past), merging FGM with existing forest monitoring is complicated. Nevertheless, FGM is of paramount importance for forestry and the natural environment in the future, regardless of the presence or existence of other monitoring systems, as it provides information no other monitoring system can yield. FGM can provide information related to adaptive and neutral genetic diversity changes over time, on a species and/or on a population basis and can serve as an early warning system for the detection of potentially harmful changes of forest adaptability. In addition, FGM offers knowledge on the adaptive potential of forests under the changing environment, which is important for the long-term conservation of FGR
Ključne besede: forest monitoring, forest genetic monitoring, forest genetic diversity, silviculture
DiRROS - Objavljeno: 20.02.2020; Ogledov: 12; Prenosov: 4
URL Celotno besedilo (0,00 KB)

9.
The impact of adverse weather and climate on the width of European beech (Fagus sylvatica L.) tree rings in Southeastern Europe
Stefan Stjepanović, Bratislav Matović, Dejan Stojanović, Branislava Lalić, Tom Levanič, Saša Orlović, Marko Gutalj, 2018

Povzetek: European beech (Fagus sylvatica L.) is the most important deciduous tree species in Europe. According to different climate scenarios, there is a relatively high probability of a massive decline in and loss of beech forests in southern Europe and in the southern part of central Europe. Thus, the authors of this study explored the dynamics of tree diameter increments and the influence of extremely dry years on the width of tree rings. This study used dendroecological methods to analyze the growth and diameter increments of European beech trees at locations in Serbia and the Republic of Srpska. The sampling was conducted along the vertical distribution of beech forests, at five sites at the lower limit of the distribution, at five optimal sites of the distribution, and at five sites at the upper limit of the distribution. Long-term analyses indicate that dry conditions during a growing season can reduce tree-ring width, but a reduction in tree growth can be expected as a result of more than one season of unfavorable conditions. Low temperatures in autumn and winter and prolonged winters can strongly affect upcoming vegetation and reduce tree development even under normal thermal conditions during a growing season.
Ključne besede: European beech, climate change, drought, air temperature, precipitation, tree rings, dendrochronology, Fagus sylvatica L.
DiRROS - Objavljeno: 20.02.2020; Ogledov: 11; Prenosov: 6
URL Celotno besedilo (0,00 KB)

10.
The effects of a large-scale ice storm event on the drivers of bark beetle outbreaks and associated management practices
Maarten De Groot, Nikica Ogris, Andrej Kobler, 2018

Povzetek: Large-scale disturbances in forests are becoming more frequent due to a changing climate. Biotic disturbances can have cascading effects and therefore have a significant economic impact in forestry. It is therefore important to gain an understanding of the drivers of forest pest outbreaks in epidemic situations after large-scale disturbances and the implications for forest management. We investigated the influence of drivers on the bark beetle outbreaks following a large-scale ice storm in 2014 in Slovenia. A country-wide survey was done on the variables affecting ice storm damage to spruce trees. Additionally, the influence of the drivers of bark beetle attacks on outbreak intensity was assessed and compared under epidemic and endemic situations, and the effectiveness of forest management measures was assessed. Spruce trees were either uprooted or snapped, or the crown was lightly to severely damaged. The outbreaks under endemic situations were potentiated by the increasing amount of spruce and reduced by increasing slope. After the ice storm, the amount of sanitary felling because of outbreaks increased in areas with more steeper slopes, where the ice storm took place. An increase in the level of disturbance and a higher availability of dead and weakened trees positively affected bark beetle populations. The removal of dead trees alone in the first year after the ice storm was found to be an insufficient measure for preventing bark beetle outbreaks. The ineffectiveness of current practices suggests that bark beetle management should be reconsidered with regard to large-scale disturbances. When defining measures against bark beetle outbreaks, drivers in epidemic situations should be prioritized over those that are important in endemic situations. The results imply that the known factors that affect bark beetle attacks are not necessarily the same as those that drive bark beetle attacks after extraordinary disturbance events. Mixed stands should be promoted in forests for sustainable management.
Ključne besede: Bark beetle outbreaks, large-scale catastrophic event, Norway spruce damage, Sanitary fellings, Slovenia, eruptive forest pest, Ips typographus, Bark beetle
DiRROS - Objavljeno: 20.02.2020; Ogledov: 2; Prenosov: 5
URL Celotno besedilo (0,00 KB)

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