1721 research outputs found
Sort by
Phenological phases of trees on the intensive forest monitoring plots in Slovenia
No full textStudy of developmental stages of forest trees in a long time series is of increasing importance for determination of interdependence between meteorological variables and the associated biological responses. In our study we analyzed the needle appearance and leaf unfolding of conifers and deciduous trees and the autumn colouring for broad-leaved tree species. We considered the phenological phases for oak (Quercus robur L.) in research plots Krakovski gozd and Murska šuma, beech (Fagus sylvatica L.) in research plots Lontovž, Temenjak, Borovec, Fondek, Gorica; spruce (Picea abies (L.) Karst.) in research plots Kladje and Krucmanove Konte; Scotch pine (Pinus sylvestris L.) in the research plot Brdo, black pine (Pinus nigra Arnold) in the research plot Gropajski bori. On average, the needle appearance (BGS) of spruce started on the 166th Julian day. BGS of Scotch pine started on the 128th Julian Day, BGS of black pine on the 149th Julian day, respectively. The leaf unfolding (BGS) for beech started, on average, on the 128th Julian day and BGS for oak on the 117th Julian day, respectively. The autumn colouring(EGS) for beech, on average, started on the 297th Julian day, for oak on the 308th Julian day. It was assessed that BGS possibly commenced earlier for spruce, Scotch pine and black pine in all research plots during the 2004 to 2011 period. However, earlier BGS for beech and oak was noticed only in limited number of pots. Later EGS for beech could be confirmed in only two plots (Borovec in Gorica), whereas changes in EGS for oak were later only in plot Murska Šuma. There was a large variability of LGS for beech and oak over the years. Prolonged growing season (LGS) of beech was statistically significant for 3 plots (Fondek, Borovec in Gorica) during the 2004 to 2011 period. For oak prolonged LGS was not statistically significant during the observation period
Translating conservation genetics into management: Pan-European minimum requirements for dynamic conservation units of forest tree genetic diversity
No full textThis paper provides a review of theoretical and practical aspects related to genetic management of forest trees. The implementation of international commitments on forest genetic diversity has been slow and partly neglected. Conservation of forest genetic diversity is still riddled with problems, and complexities of national legal and administrative structures. Europe is an example of a complex region where the distribution ranges of tree species extend across large geographical areas with profound environmental differences, and include many countries. Conservation of forest genetic diversity in Europe has been hampered by a lack of common understanding on the management requirements for genetic conservation units of forest trees. The challenge resides in integrating scientific knowledge on conservation genetics into management of tree populations so that recommendations are feasible to implement across different countries. Here, we present pan-European minimum requirements for dynamic conservation units of forest genetic diversity. The units are natural or man-made tree populations which are managed for maintaining evolutionary processes and adaptive potential across generations. Each unit should have a designated status and a management plan, and one or more tree species recognized as target species for genetic conservation. The minimum sizes of the units are set at 500, 50 or 15 reproducing individuals depending on tree species and conservation objectives. Furthermore, silvicultural interventions should be allowed to enhance genetic processes, as needed, and field inventories carried out to monitor regeneration and the population size. These minimum requirements are now used by 36 countries to improve management of forest genetic diversity
Towards a unified paradigm for sequence-based identification of Fungi
No full textThe nuclear ribosomal internal transcribed spacer (ITS) region is the formal fungal barcode and in most cases the marker of choice for the exploration of fungal diversity in environmental samples. Two problems are particularly acute in the pursuit of satisfactory taxonomic assignment of newly generated ITS sequences: (i) the lack of an inclusive, reliable public reference data set and (ii) the lack of means to refer to fungal species, for which no Latin name is available in a standardized stable way. Here, we report on progress in these regards through further development of the UNITE database (http://unite.ut.ee) for molecular identification of fungi. All fungal species represented by at least two ITS sequences in the international nucleotide sequence databases are now given a unique, stable name of the accession number type (e.g. Hymenoscyphus pseudoalbidus|GU586904|SH133781.05FU), and their taxonomic and ecological annotations were corrected as far as possible through a distributed, third-party annotation effort. We introduce the term ‘species hypothesis’ (SH) for the taxa discovered in clustering on different similarity thresholds (97–99%). An automatically or manually designated sequence is chosen to represent each such SH. These reference sequences are released (http://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and in the QIIME pipeline. The system and the data will be updated automatically as the number of public fungal ITS sequences grows. We invite everybody in the position to improve the annotation or metadata associated with their particular fungal lineages of expertise to do so through the new Web-based sequence management system in UNITE
Slovenian forest sector eIntegrated drought management in Central and Eastern Europe, Global water partnership Central and Eastern Europe, project: assessment of drought impact on forest ecosystems, report on topic 1 and 2
Get PDFModel for the evaluation of television commercials of timber companies
No full textTimber companies must continually strive to improve or at least maintain its market share.
There are several methods to achieve this, among them advertising. The company should prepare such
advertisements, which will be attractive to consumers and they will like them. By doing so, it must take
into account a number of criteria as well as the fact that some of these are more important than the
others. In the project we used the AHP method to determine the market professionals’ opinion about the
importance of criteria in television advertising of timber products and services. Based on the results we
developed a model for evaluating television advertisements and we tested it with random respondents
who evaluated sample television advertisement of timber companies
Wood in the Ban's house at Artiče, Slovenia, as a historical archive
No full textWe conducted a survey of wood and performed dendrochronological dating of beams from the external walls of the old Ban’s House in the village of Artiče near Brežice. The logs were made of different wood species, with different oaks among them, i.e. sessile oak (Quercus petraea), pedunculate oak (Quercus robur) and Turkey oak (Quercus cerris), as well as sweet chestnut (Castanea
sativa) and Norway spruce (Picea abies). Based on dendrochronological dating of the outermost tree-rings, the beams were divided into groups having the end dates of 1535 (2 beams – Turkey oak and pedunculate / sessile oak), 1563-1592 (8 logs - 5 Turkey oak and 3 pedunculate / sessile oak), 1613-1720 (3 logs - pedunculate / sessile oak), 1779-1792 (7 logs - 4 pedunculate / sessile oak and 3 chestnuts) and ≥ 1913 (10 spruce logs). The beams of different wood species and with different end dates were mixed across the walls, indicating that the house had been rebuilt several times and that the timber from the same house or other buildings was re-used. Our assessments concerning different end dates and selection of several wood species were supplemented with information from forestry sources. They showed that the wood was very likely of local origin
EMoNFUr - Zasnova mreže za spremljanje stanja nižinskega gozda in pogozditev vurbanem prostoru v Lombardiji in urbanega gozda v Sloveniji (Life+ 10 ENV/IT/000399) : poročilo o izvajanju projekta : po pogodbi štev. 356-23/2010-6
Get PDFThe reliability of volume functions based on spruce tree species in Slovenia
No full textVarious volume functions used for tree volume estimations were compared by the authors. Using section measurements (Newton’s method), they calculated the real tree volumes of 88 felled spruce trees on the Pokljuka plateau. The real tree volumes were used to form regional three-entry volume functions, (two-entry) volume tables, and tariff functions. The standard error of the average tree volume estimation is the lowest for three-entry volume functions (5.0%), then for volume tables (11.7%), and the highest for tariffs (15.1%). The reliability and applicability of the developed regional and other volume functions was
verified on two one-hectare research plots. It was established that by applying the adapted German volume tables, the measured spruce volumes were too high. As the volumes measured in this manner are used when determining the adapted tariffs in Slovenia, this procedure results in a tariff class of at least 5% too high tree volumes
