31. Poročilo o preskusu št.: LVG 2022-003 : vzorec št. 2022/00005 : namen testiranja: sum na: Rizosphaera piniNikica Ogris, Maarten De Groot, 2022, izvedensko mnenje, arbitražna odločba Ključne besede: varstvo gozdov, morfološke analize, smreka, Picea abies, Phomopsis, sušenje, sušni stres, odmiranje vej, kompleksna bolezen
Objavljeno v DiRROS: 04.03.2022; Ogledov: 654; Prenosov: 231
 Celotno besedilo (1,12 MB) |
32. Combining an occurrence model and a quantitative model for the prediction of the sanitary felling of Norway spruce because of bark beetlesMaarten De Groot, Nikica Ogris, 2022, izvirni znanstveni članek Povzetek: The European spruce bark beetle (Ips typographus L.) is an eruptive forest pest that has caused a great deal of damage in the last decades because of increasing climatic extremes. In order to effectively manage outbreaks of this pest, it is important to predict where they will occur in the future. In this study we developed a predictive model of the sanitary felling of Norway spruce (Picea abies (L.) H. Karst.) because of bark beetles. We used a time series of sanitary felling because of bark beetles from 1996 to 2020 in Slovenia. For the explanatory variables, we used soil, site, climate, geographic, and tree damage data from the previous year. The model showed that sanitary felling is negatively correlated with slope, soil depth, soil cation exchange capacity, and Standard Precipitation Index (less sanitary felling in wet years). On the other hand, soil base saturation percentage, temperature, sanitary felling because of bark beetles from the previous year, sanitary felling because of other abiotic factors from the previous year, and the amount of spruce were positively correlated with the sanitary felling of Norway spruce due to bark beetles. The model had an R2 of 0.38. A prediction was performed for 2021 combining an occurrence model and a quantitative model. The model can be used to predict the amount of sanitary felling of Norway spruce due to bark beetles and to refine the risk map for the next year, which can be used for forest management planning and economic loss predictions.
Ključne besede: sanitary felling, prediction, Ips typographus, Picea abies, Slovenia, forecasting, insect outbreak forest pest
Objavljeno v DiRROS: 21.02.2022; Ogledov: 652; Prenosov: 533
Celotno besedilo (1,24 MB)
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33. Potential link between ectomycorrhizal community composition and host tree phenologyTina Unuk Nahberger, Rok Damjanić, Hojka Kraigher, Tine Grebenc, 2021, izvirni znanstveni članek Povzetek: The timing of leaf phenology tends to be crucial in controlling ecosystem processes such as the acquisition of carbon and water loss as well as in controlling tree nutrient cycling. To date, tree phenology has mostly been associated with environmental control (e.g., temperature and photoperiod) in a relationship with inheritance, while it has rarely been linked with ectomycorrhizal community compositional changes through the host tree’s phenological stages. Seasonal variations of fungal communities have been widely studied, but little is known about mycorrhiza community composition changes along phenological stages. Therefore, we analyzed ectomycorrhizal communities associated with silver fir and their compositional changes during the transition between phenological stages. The phenological stages of each individual tree and time of bud break were monitored weekly for two years and, at the same time, ectomycorrhiza was harvested from selected silver fir trees. In total, 60 soil cores were analyzed for differences in the ectomycorrhizal community between phenological stages using Sanger sequencing of individual ectomycorrhizal morphotypes. A significant difference in beta diversity for an overall ectomycorrhizal community was confirmed between analyzed time periods for both sampled years. Species-specific reactions to transitions between phenological stages were confirmed for 18 different ectomycorrhizal taxa, where a positive correlation of Russula ochroleuca, Russula illota, Tomentella sublilacina, and Tylospora fibrillosa was observed with the phenological stage of bud burst.
Ključne besede: Abies alba (Mill.), ectomycorrhizal community, phenological stages
Objavljeno v DiRROS: 20.12.2021; Ogledov: 778; Prenosov: 578
Celotno besedilo (1,73 MB)
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34. Preverjanje kratkoročnih napovedi sanitarnega poseka smreke in jelke zaradi podlubnikov v Sloveniji v 2021Nikica Ogris, Maarten De Groot, 2021, kratki znanstveni prispevek Ključne besede: navadna smreka, Picea abies, bela jelka, Abies alba, sanitarni posek, napovedi, ogroženost, modeli, validacija, zmogljivost, zanesljivost, točnost, natančnost, AUC, občutljivost, specifičnost
Objavljeno v DiRROS: 14.12.2021; Ogledov: 753; Prenosov: 592
Celotno besedilo (1,42 MB)
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35. Poročilo o preskusu št.: LVG 2021-385 : opis vzorca: Abies concolor, les, lubje, sekanci : namen testiranja: sum na: GlivaBarbara Piškur, Tašja Cvelbar, Maša Zagorac, Špela Jagodic, Zina Devetak, Nikica Ogris, 2021, izvedensko mnenje, arbitražna odločba Ključne besede: varstvo gozdov, morfološke analize, Abies concolor, koloradska jelka, glive, Diplodia pinea, Diaporthe, nekroza skorje, sušenje vej, rakasta razjeda
Objavljeno v DiRROS: 26.11.2021; Ogledov: 751; Prenosov: 0 |
36. Poročilo o preskusu št.: LVG 2021-383 : opis vzorca: LVG2021/00684: Picea abies, cela rastlina, št. enot 2, LVG2021/00685: Taxus baccata, veja (z listi ali brez) ali poganjki, št. enot 1 : namen testiranja: LVG2021/00684: sum na: Gliva, LVG2021/00685: sum na: GlivaBarbara Piškur, Tašja Cvelbar, Špela Jagodic, Zina Devetak, Nikica Ogris, 2021, izvedensko mnenje, arbitražna odločba Ključne besede: varstvo gozdov, morfološke analize, Picea abies, navadna smreka, Taxus baccata, tisa, glive
Objavljeno v DiRROS: 26.11.2021; Ogledov: 696; Prenosov: 0 |
37. Poročilo o preskusu št.: LVG 2021-382 : opis vzorca: LVG2021/00674: Juniperus, veja (z listi ali brez) ali poganjki, LVG2021/00675: Abies nordmanniana, les, lubje, sekanci, LVG2021/00676: Abies koreana, veja (z listi ali brez) ali poganjki, LVG2021/00677: Davidia involucrata, veja (z listi ali brez) ali poganjki, LVG2021/00678: Diospyros kaki, veja (z listi ali brez) ali poganjki, LVG2021/00679: Pinus heldreichii, listi : namen testiranja: LVG2021/00674: sum na: Gymnosporangium, LVG2021/00675: sum na: Neonectria neomacrospora, LVG2021/00676: sum na: Neonectria neomacrospora, LVG2021/00677: sum na: Fusarium, LVG2021/00678: sum na: Fusarium, LVG2021/00679: sum na: SušaNikica Ogris, Tašja Cvelbar, Špela Jagodic, Zina Devetak, Barbara Piškur, 2021, izvedensko mnenje, arbitražna odločba Ključne besede: varstvo gozdov, morfološke analize, Juniperus, brin, Abies nordmanniana, kavkaška jelka, Abies koreana, korejska jelka, Davidia involucrata, davidija, Diospyros kaki, kaki, Pinus heldreichii, munika, Gymnosporangium, Neonectria neomacrospora, Fusarium, suša, sušenje vej, sušenje sadik, nekroza
Objavljeno v DiRROS: 26.11.2021; Ogledov: 744; Prenosov: 0 |
38. Poročilo o preskusu št.: LVG 2021-379 : opis vzorca: Picea abies, les, lubje, sekanci : namen testiranja: sum na: Ips duplicatusAndreja Kavčič, 2021, izvedensko mnenje, arbitražna odločba Ključne besede: varstvo gozdov, morfološke analize, Picea abies, navadna smreka, Ips duplicatus, dvojnozobi smrekov lubadar
Objavljeno v DiRROS: 18.11.2021; Ogledov: 769; Prenosov: 0 |
39. Poročilo o preskusu št.: LVG 2021-378 : opis vzorca: Picea abies, les, lubje, sekanci : namen testiranja: sum na: Ips duplicatusAndreja Kavčič, 2021, izvedensko mnenje, arbitražna odločba Ključne besede: varstvo gozdov, morfološke analize, Picea abies, navadna smreka, Ips duplicatus, dvojnozobi smrekov lubadar
Objavljeno v DiRROS: 18.11.2021; Ogledov: 676; Prenosov: 0 |
40. Poročilo o preskusu št.: LVG 2021-377 : opis vzorca: Picea abies, les, lubje, sekanci : namen testiranja: sum na: Ips duplicatusAndreja Kavčič, 2021, izvedensko mnenje, arbitražna odločba Ključne besede: varstvo gozdov, morfološke analize, Picea abies, navadna smreka, Ips duplicatus, dvojnozobi smrekov lubadar
Objavljeno v DiRROS: 18.11.2021; Ogledov: 690; Prenosov: 0 |
