681. Analiza uspešnosti prodaje gozdnih lesnih sortimentov v gozdarski zadrugi lastnikov gozdov Pohorje - KozjakGregor Černač, Špela Pezdevšek Malovrh, 2020, izvirni znanstveni članek Povzetek: V prispevku je na primeru Gozdarske zadruge lastnikov gozdov Pohorje - Kozjak (zadruga) analizirana prodaja gozdnih lesnih sortimentov (GLS) za obdobje 2013%2017. S pomočjo obračunov prodaje GLS smo pridobili podatke o količini in cenah GLS, o prodajalcih GLS ter trgu. Za analizo uspešnosti prodaje GLS smo zadružne cene primerjali s povprečnimi slovenskimi cenami. S pomočjo anketnega vprašalnika smo pridobili podatke o zadovoljstvu članov zadruge z odkupnimi cenami ter samim delovanjem zadruge. Zadruga je večino lesa odkupila od nečlanov zadruge ter ga v veliki meri prodala v sosednjo Avstrijo. Odkupna cena za GLS je v zadrugi za 18,3 % višja od povprečne slovenske. Člani zadruge so v povprečju zadovoljni s cenami za odkupljene GLS, a se kljub temu 37,5 % anketiranih odloča za prodajo tudi drugim odkupovalcem, kar dolgoročno pomeni problem. Na podlagi rezultatov zaključimo, da se je zadružni model poslovnega povezovanja lastnikov gozdov izkazal kot uspešen, zato je nujno, da začne država prek gozdne politike intenzivneje pospeševati in finančno podpirati tovrstne modele poslovnega povezovanja.
Ključne besede: zasebni gozdovi, poslovno povezovanje, lastništvo gozdov, gozdarske zadruge, trg lesa
Objavljeno v DiRROS: 20.08.2020; Ogledov: 5913; Prenosov: 1702
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682. Isotopic and water relation responses to ozone and water stress in seedlings of three oak species with different adaptation strategiesClaudia Cocozza, Elena Paoletti, Tanja Mrak, Saša Zavadlav, Tom Levanič, Hojka Kraigher, Alessio Giovannelli, Yasutomo Hoshika, 2020, izvirni znanstveni članek Povzetek: The impact of global changes on forest ecosystem processes is based on the species-specific responses of trees to the combined effect of multiple stressors and the capacity of each species to acclimate and cope with the environment modification. Combined environmental constraints can severely affect plant and ecological processes involved in plant functionality. This study provides novel insights into the impact of a simultaneous pairing of abiotic stresses (i.e., water and ozone (O3) stress) on the responses of oak species. Water stress (using 40 and 100% of soil water content at field capacity - WS and WW treatments, respectively) and O3 exposure (1.0, 1.2, and 1.4 times the ambient concentration - AA, 1.2AA, and 1.4AA, respectively) were carried out on Quercus robur L., Quercus ilex L., and Quercus pubescens Willd. seedlings, to study physiological traits (1. isotope signature [delta 13C, delta 18O and delta 15N], 2. water relation [leaf water potential, leaf water content], 3. leaf gas exchange [light-saturated net photosynthesis, Asat, and stomatal conductance, gs]) for adaptation strategies in a Free-Air Controlled Exposure (FACE) experiment. Ozone decreased Asat in Q. robur and Q. pubescens while water stress decreased it in all three oak species. Ozone did not affect delta 13C, whereas delta 18O was influenced by O3 especially in Q. robur. This may reflect a reduction of gs with the concomitant reduction in photosynthetic capacity. However, the effect of elevated O3 on leaf gas exchange as indicated by the combined analysis of stable isotopes was much lower than that of water stress. Water stress was detectable by delta 13C and by delta 18O in all three oak species, while delta 15N did not define plant response to stress conditions in any species. The delta 13C signal was correlated to leaf water content (LWC) in Q. robur and Q. ilex, showing isohydric and anisohydric strategy, respectively, at increasing stress intensity (low value of LWC). No interactive effect of water stress and O3 exposure on the isotopic responses was found, suggesting no cross-protection on seasonal carbon assimilation independently on the species adaptation strategy.
Ključne besede: ozone, gas exchange, English oak, holm oak, downy oak, Quercus ilex L., Quercus robur L., Quercus pubescens Willd
Objavljeno v DiRROS: 11.08.2020; Ogledov: 1811; Prenosov: 1094
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683. Divjad na nelovnih površinah : težave, izzivi in rešitveBoštjan Pokorny, Ajša Alagić, Elena Bužan, Hubert Potočnik, Andrej Šorgo, Katarina Flajšman, 2020, strokovni članek Ključne besede: lov, lovstvo, divjad, upravljanje z divjado, nelovne površine, škoda, konflikt
Objavljeno v DiRROS: 30.07.2020; Ogledov: 2051; Prenosov: 548
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684. PCR primers comparisons for a successful Tuber spp. DNA region amplification in routine identificationsTina Unuk Nahberger, Hojka Kraigher, Tine Grebenc, 2020, izvirni znanstveni članek Povzetek: Since late 20th century DNA sequencing became the method of choice method in precision species identification. The ITS region is one of the official fungal barcoding DNA markers, although in some cases sequencing of the ITS re-gion may, due to misidentification, mislabeling or nomen-clature errors in public databases, lead to incorrect or insuf-ficient identification, as is currently a case in the genus Tu b e r. The aim of this study was to test, which ITS primer pairs are most appropriate and optimal for Tu b e r species DNA region amplification. Thereby we (1) compared ampli-fication success for different Tu b e r species using fungal spe-cific primer pair ITS1f and ITS4 and (2) compared amplifi-cation success using different ITS primer pair combinations in amplifying DNA region an example species Tuber aesti-vum. Based on results, Tuber aestivum was one of the most reluctant Tu b e r species in this study and in most cases failed to amplify with the above primer pair. After comparing dif-ferent ITS primer pairs, we conclude that the primer pair ITS5 and ITS7 is the most appropriate primer pair for ampli-fication DNA region of T. ae stiv um as it resulted in high am-plification success from ectomycorrhizal root tips. Based on sequences, gained from public databases, we found that ITS1f and ITS6 primers have a mismatch in one base pair compared to the target sequence of Tuber aestivum, thus re-sulting in poor or no amplification success. Although prim-er pair ITS5 and ITS7 in our study was proven to be the most appropriate primer pair in amplifying DNA region Tu b e r aestivum species, further analysis about appropriateness of it for a general barcoding and identification of ectomycorrhiza in complex community samples is needed.
Ključne besede: Tuber spp., ITS region, PCR amplification, ITS primers
Objavljeno v DiRROS: 30.07.2020; Ogledov: 1643; Prenosov: 1196
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685. Namnožitev osmerozobega in šesterozobega smrekovega lubadarja v Sloveniji v 2020Nikica Ogris, Marija Kolšek, 2020, strokovni članek Ključne besede: Ips typographus, Pityogenes chalcographus, namnožitev, navadna smreka, Picea abies, osmerozobi smrekov lubadar, šesterozobi smrekov lubadar, lokacija, populacija, gostota, model, RITY-2, CHAPY-1
Objavljeno v DiRROS: 30.07.2020; Ogledov: 1654; Prenosov: 866
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688. Rjavenje borovih iglic, Mycosphaerella dearnessiiDušan Jurc, 2008, strokovni članek Ključne besede: rjavenje iglic, iglice, bor, Pinus sp., Mycosphaerella dearnessii, bolezni drevja, gozdovi, varstvo gozdov
Objavljeno v DiRROS: 29.07.2020; Ogledov: 1304; Prenosov: 658
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