141. Poročilo o preskusu št.: LVG 2021-042 : opis vzorca: Pseudotsuga menziesii, veja (z listi ali brez) ali poganjki : namen testiranja: sum na: GlivaNikica Ogris, Maarten De Groot, 2021, izvedensko mnenje, arbitražna odločba Ključne besede: varstvo gozdov, morfološke analize, duglazija, Pseudotsuga menziesii, Rhizosphaera pini, rjavenje smrekovih iglic, Phomopsis, Pityophthorus pityographus, jelov vejni lubadar Objavljeno v DiRROS: 10.06.2021; Ogledov: 863; Prenosov: 301 Celotno besedilo (220,69 KB) |
142. Na kaj moramo biti pozorni, ko izbiramo feromonski pripravek za ulov osmerozobega smrekovega lubadarja v režaste pasti?Nina Šramel, Andreja Kavčič, Marija Kolšek, Maarten De Groot, 2021, drugi znanstveni članki Ključne besede: gozdovi, varstvo gozdov, Ips typographus, feromonski pripravki, analiza učinkovitosti, podlubniki, ulov lubadarja, indeks učinkovitosti Objavljeno v DiRROS: 18.05.2021; Ogledov: 1271; Prenosov: 882 Celotno besedilo (874,46 KB) Gradivo ima več datotek! Več... |
143. Poročilo o preskusu št.: LVG 2021-015 : opis vzorca: LVG2021/00014: Ulmus, les, lubje, sekanci, LVG2021/00015/V1: Pinus nigra, veja (z listi ali brez) ali poganjki, LVG2021/00016/V2: Pinus sylvestris, veja (z listi ali brez) ali poganjki, LVG2021/00017/V3: Pinus sylvestris, veja (z listi ali brez) ali poganjki, LVG2021/00018/V4: Pinus sylvestris, veja (z listi ali brez) ali poganjki, LVG2021/00022/mdg: Pinus sylvestris, žuželka, LVG2021/00019: Pseudotsuga menziesii, veja (z listi ali brez) ali poganjki : namen testiranja: LVG2021/00014: sum na: Scolytus, LVG2021/00015/V1: sum na: Dothistroma, LVG2021/00016/V2: sum na: Diplodia pinea, LVG2021/00017/V3: sum na: Diplodia pinea, LVG2021/00018/V4: sum na: Dothistroma, LVG2021/00022/mdg: sum na: Fitofagna žuželka, LVG2021/00019: sum na: GlivaNikica Ogris, Tašja Cvelbar, Zina Devetak, Maarten De Groot, Barbara Piškur, 2021, izvedensko mnenje, arbitražna odločba Ključne besede: varstvo gozdov, morfološke analize Objavljeno v DiRROS: 15.04.2021; Ogledov: 759; Prenosov: 227 Celotno besedilo (5,08 MB) |
144. Ohranjenost drevesne sestave in realizacija možnega poseka zmanjšujeta obseg sanitarnih sečenj v SlovenijiJurij Diaci, Maarten De Groot, Nikica Ogris, 2021, strokovni članek Povzetek: Splošno sprejeto stališče je, da s sonaravnim gospodarjenjem zmanjšujemo tveganja pri gospodarjenju z gozdovi. Za potrditev tega stališča obstajajo dobri zgledi gospodarjenja in posredni dokazi, primanjkuje pa znanstvenih študij, ki bi na podlagi kvantitativnih analiz to potrjevale. V Sloveniji smo potrdili pozitivne povezave med ohranjeno drevesno sestavo, rednim gospodarjenjem in manj sanitarnimi sečnjami. V dobi izrazitih okoljskih sprememb je smiselno spodbujati redno gospodarjenje z gozdovi. V prihodnosti bo zaradi socialno-ekonomskih sprememb še bolj izraženo opuščanje gospodarjenja. V članku razpravljamo o številnih prednostih rednega gospodarjenja. V prihodnje bo treba poleg vloge rednega gospodarjenja za preskrbo lesnopredelovalne verige večji poudarek nameniti pomenu dejavnega gospodarjenja za prilagajanje gozda na okoljske spremembe in za zdravje gozda. Ključne besede: realizacija možnega poseka, aktiviranje gospodarjenja z gozdovi, zdravje gozda, podlubniki, sestoji smreke Objavljeno v DiRROS: 14.04.2021; Ogledov: 1567; Prenosov: 431 Celotno besedilo (214,07 KB) |
145. Private forest owner characteristics affect European spruce bark beetle management under an extreme weather event and host tree densityMaarten De Groot, Jurij Diaci, Kaja Kandare, Nike Krajnc, Rok Pisek, Špela Ščap, Darja Stare, Nikica Ogris, 2021, izvirni znanstveni članek Povzetek: In the last few decades, an increasing number and intensity of bark beetle outbreaks have plagued the forests of Europe and North America. Bark beetle management is directly related to forest owner characteristics, although this relationship is not well understood. The purpose of the study was to investigate the influence of forest owner characteristics on the amount and timing of sanitary felling under different disturbance regimes and quantities of Norway spruce. We combined different databases on sanitary felling, the timing of sanitary felling, and forest owner characteristics for Slovenia from 2014 to 2018 and analyzed the amount and timing of sanitary felling in relation to forest owner characteristics. We found that the timing in winter and the amount of sanitary felling were positively associated with the distance of the owner%s residence to the forest parcel. Larger parcels were more affected by bark beetles but did not have later timing of cutting in the summer period as was hypothesized. The timing of sanitary felling decreased with property size, while with the probability of sanitary felling, the effect of property depended on the ice storm and the amount of spruce. The size of the settlement, the permanent address of the private owner, and timing of sanitary felling were positively associated but also depended on the amount of spruce. Gender and age did not have an important influence on the amount and timing of sanitary felling. Forest owners are an important factor in effective bark beetle management. This study highlights the private forest ownership characteristics that should be emphasized in order to fight bark beetle outbreaks in the event of large-scale disturbances. Governments should support forest owners who are at greater risk of bark beetle outbreaks and less efficient in managing outbreaks. Furthermore, landowner characteristics should be included when forecasting bark beetle outbreaks. Ključne besede: close-to-nature management, sanitary felling, Ips typographus, forest pest management, forest owner characteristics Objavljeno v DiRROS: 22.03.2021; Ogledov: 1199; Prenosov: 833 Celotno besedilo (444,49 KB) Gradivo ima več datotek! Več... |
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147. Predlog števila in lokacij kontrolnih-lovnih pasti in kontrolno-lovnih nastav v 2021Nikica Ogris, Marija Kolšek, Maarten De Groot, 2021, drugi znanstveni članki Ključne besede: kontrolno-lovna past, kontrolno-lovna nastava, optimizacija, protokoli, osmerozobi smrekov lubadar, Ips typographus, smreka, Picea abies, spremljanje, monitoring Objavljeno v DiRROS: 04.02.2021; Ogledov: 1198; Prenosov: 966 Celotno besedilo (1,84 MB) Gradivo ima več datotek! Več... |
148. Estimating the most effective and economical pheromone for monitoring the European spruce bark beetleNina Šramel, Andreja Kavčič, Marija Kolšek, Maarten De Groot, 2021, izvirni znanstveni članek Povzetek: In recent decades, there have been an increasing number of outbreaks of Ips typographus in Europe. A large amount of sanitary felling has taken place, with significant economic and ecological consequences. In order to anticipate such large%scale outbreaks, an effective monitoring system should be set up. One important aspect of monitoring is deciding which pheromone to use. Therefore, we decided to test five different commercially available pheromone lures under different disturbance conditions: Pheroprax%, IT Ecolure Extra%, Ipstyp%, Ipsowit% and Typosan%. We investigated the ability of the pheromones to distinguish between disturbed and undisturbed locations, their cost%efficiency ratio, and side effects such as bycatch abundance and composition. We set 50 traps in two areas with sites that were disturbed and undisturbed by windstorms. We collected the catch from traps every 1%2 weeks from the end of March until the end of September in 2019. We found that IT Ecolure Extra%, Ipsowit% and % Pheroprax% caught the most I. typographus and best showed changes in the trap catch of I. typographus throughout the whole season. There was a low amount of bycatch (<6% of the total catch) and a low number of predators (a few specimens), but some groups seem to prefer certain pheromones. The cost of the pheromones increased with their effectiveness. However, pheromone costs are low relative to the personnel costs involved in setting traps and collecting the catch. Based on all of the gathered data, we created an index which helps to assess the cost%efficiency of the five chosen commercially available pheromones. We also present guidelines on how to make such an index to assist other researchers in choosing the right pheromone for monitoring populations of I. typographus or other bark beetle species. Ključne besede: bark beetles, cost-efficiency, Ips typographus, monitoring pheromones, Picea abies Objavljeno v DiRROS: 21.01.2021; Ogledov: 1446; Prenosov: 795 Celotno besedilo (1,21 MB) Gradivo ima več datotek! Več... |
149. Go for Mura : upravljanje poplavnih gozdov v območjih Natura 2000 ob MuriŠpela Ambrožič, Gregor Božič, Maarten De Groot, Andreja Ferreira, Tatjana Gregorc, Marjana Hönigsfeld Adamič, Anže Japelj, Andrej Kapla, Marko Kovač, Štefan Kovač, Lado Kutnar, Tom Levanič, Boštjan Mali, Aleksander Marinšek, Zdenka Mazej, Nikica Ogris, Špela Planinšek, Mitja Skudnik, Gabrijela Triglav Brežnik, Saša Vochl, Al Vrezec, 2017, strokovna monografija Povzetek: Vsebina publikacije na kratko povzema izsledke projekta Go for Mura. Predstavljeni so poplavni in močvirni gozdovi ob Muri, njihov pomen ter različni vidiki omenjenih gozdov, ki so bili raziskani tekom projekta. Predstavljene so ostale aktivnosti projekta . Ključne besede: Natura 2000, gospodarjenje, poškodovanost gozdov, poplavni gozd, Slovenija Objavljeno v DiRROS: 18.01.2021; Ogledov: 1619; Prenosov: 480 Celotno besedilo (2,27 MB) |
150. Preverjanje kratkoročnih napovedi sanitarnega poseka smreke in jelke zaradi podlubnikov v Sloveniji v 2020Nikica Ogris, Maarten De Groot, 2020, drugi znanstveni članki 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: 14.01.2021; Ogledov: 1098; Prenosov: 1117 Celotno besedilo (1,66 MB) Gradivo ima več datotek! Več... |