Slovenian Forestry Institute

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    1721 research outputs found

    Biodiversity of saproxylic beetles of pine forests in Slovenia with emphasis on Monochamus species

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    From 2007 to 2010, we assessed the presence of entomofauna in two ecological regions of Slovenia on three locations: on limestone parent rock in monocultures of Pinus nigra, on flysch in a stand of Pinus halepensis (both in the Sub-mediterranean ecological region) and in a stand of Pinus sylvestris on brown soil (Pre-alpine ecological region). The samples were collected in one-month intervals from May to November using four cross vane funnel traps per location with wet collecting cups and attractants (ethanol+α- pinene, Pheroprax® and Gallowit®). Collected insects from the order Coleoptera belonged to the families Curculionidae (and subfam. Scolytinae), Cerambycidae and Buprestidae. The most important saproxylic groups were Scolytinae as the primary saproxylic beetles at 90.7% (21,820 specimens), containing 21 taxa and 18 species; Cerambycidae at 6.4 % (1534 specimens), 24 taxa, 20 species; Curculionidae at 2.5% (613 specimens), eight species and Buprestidae at 0.4% (90 specimens) and one species. With respect to the number of species identified, the most numerous family was Cerambycidae; the dominant species was Spondylis buprestoides, followed by Rhagium inquisitor, Arhopalus rusticus, Acanthocinus aedilis, Neoclytus acuminatus, Monochamus galloprovincialis, Leiopus nebulosus, Arhopalus ferus, Sticoleptura rubra and Cerambyx scopoli. Collected species of long-horned beetles represent ca. 10% of all known species of Cerambycidae in Slovenia. With regard to our findings, we can conclude that Slovenian forestry legislation (Act of Forestry 1993 and Rules on the Protection of Forests 2009) regarding the protection of forest biodiversity is appropriate for the preservation of saproxylics

    Contribution to the knowledge of the spring butterfly fauna of the Republic of Macedonia (Lepidoptera: Papilionoidea & Hesperioidea)

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    In spring 2010, we encountered 60 butterfly species during field surveys centred mainly in the under - surv eyed southeastern part of the Republic of Macedonia. We visited 23 localities, where several interesting observations were made. Among these, new sites of some rare species such as Pontia chloridice , Pieris krueperi , Plebejus sephirus , Scolitantides orion , Tarucus balkanicus , Melitaea ornata , Carcharodus orientalis , and Erynnis marloyi should be mentioned. Such a high number of species observed indicates an overall high butterfly diversity of this region, particularly in the lower Vardar valley. Here, sever al specific habitats hosting rare and threatened species were discovered. The anthropogenic pressure on important butterfly habitat is still low in the surveyed area; however, the first signs of large scale abandonment are already visible

    Determination of volatile compounds in dry-cured ham "Kraški pršut"

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    Poročilo za javni sklad RS za razvoj kadrov in štipendiranje. pogodba št. 11013-5/201

    Charac terization of anatomical structure and basic physical pro perties of Velenje xylite

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    Xylite is a lithotype of lignite, mainly used for fuel. The wood from which it was formed in a long term process (duration ca. 2 millions of years) was subjected to drastic changes. We conducted anatomical characterization of xylite, evaluated preservation of wood from which it was formed, defined its basic physical properties, and compared it with modern wood. We recognized ground tissue composed of tracheids, uniseriate and homocellular rays, taxodioid like crossfield pits, and abundant axial parenchyma with inclusions. The observed features are typical of coniferous wood species of the Taxodiaceae and Cupressaceae families. Colourimetric properties of xylite in CIE Lab* system are comparable to those of heartwood of ebony or wenge. The xylite had high oven dry density (1,216 kg/m3), but due to very high volumetric shrinkage (28.2 % on average), its basic density was much lower (873 kg/m3). Total linear shrinkage was considerable in all anatomical directions. Consequently it was characterized by low dimensional stability (qT = 0.65 %/%, qR = 0.30 %/%). The equilibrium moisture content (EM C) in desorption process was high, and that of adsorption was comparable to EM Cs of high density wood species. GAB sorption model proved to be appropriate for fitting the data obtained in the sorption process

    Oljarna Berce : trajno - neodvisno - lokalno : Mokronog

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    Archaeobotanical investigations at the pile-dwelling site Stare gmajne, dated on the basis of wood investigations

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    We investigated 932 samples of wood from the prehistoric pile-dwelling site Stare gmajne at Ljubljansko barje. With the help of dendrochronology, radiocarbon dating and wiggle matching method we established that the dwelling was settled in two periods from approximately 3350 until 3330, and from 3160 until 3110 cal. BC. We introduced an archaeobotanical method which is widely used in other European laboratories and identified macrobotanical remains (seeds and fruits) from both settlement periods. Most important cultural plants were: einkorn, emmer, barley, opium poppy, flax and peas. Most frequent gathered plants were: apples, pears, strawberries, blackberries, bladder cherries, cornelian cherries, hawthorns, blackthorns, grapes, dog-rose berries and nuts (acorn, hazel nut and water chestnut). While a widely accepted method was used, we identified for the first time flax and einkorn / emmer wheat on the basis of chaff remains at a Slovenian prehistoric site. We compared plant economy habits between Stare gmajne and some contemporaneous lake dwellings around the Alps; the most important cultivated wheats at Stare gmajne were emmer and einkorn, while at the sites north of the Alps naked wheat was often found. Corenlian cherry, water chestnut, and grape vine were frequent at Stare gmajne, but they were rare or were not found on the sites north of the Alps

    Robust and cost-effective system for measuring and logging of data on soil water content and soil temperature profile

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    The paper describes the system for measuring and logging of data on soil water content and soil temperature profile. The system was tested in a field and shows great potential for performing continuous measurements. It has several benefits including ease of manufacture, low cost, reliable performance and the ability to download the data without specialized software

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