81. River distance, stand basal area, and climatic conditions are the main drivers influencing lying deadwood in riparian forestsJanine Oettel, Martin Braun, Marcus Sallmannshofer, Maarten De Groot, Silvio Schueler, Charlotte Virgillito, Marjana Westergren, Gregor Božič, Laszlo Nagy, Srdjan Stojnić, Katharina Lapin, 2022, izvirni znanstveni članek Povzetek: Riparian forests are among the most diverse terrestrial ecosystems, yet their biodiversity is increasingly threatened by habitat degradation, climate change, river regulation and invasive species. We investigated deadwood, widely recognized as an indicator for forest biodiversity, in riparian forests of the Mura-Drava-Danube Transboundary Biosphere Reserve. The Biosphere Reserve is a conservation area that spans five countries and three rivers located in south-eastern Europe. In detail, we analyzed the drivers of lying deadwood volume, occurrence and decay related to floodplain type, silvicultural management, and climatic conditions using regression models. Lying deadwood occurrence and volume significantly decreased as distance from the river edge increased, indicating that river dynamics likely play a role in deadwood accumulation in riparian forests. Deadwood volume was also positively influenced by stand basal area, a parameter that can be directly addressed by silvicultural management. Deadwood decay was affected positively by temperature and negatively by precipitation, highlighting the importance of climatic conditions on decay progression. However, in order to draw more accurate conclusions about the drivers and dynamics of deadwood in riparian forests, further monitoring efforts that consider river flooding and flow regime, deadwood transport and saproxylic organism activity in addition to forest management and site conditions, are needed. Ključne besede: alluvial forest, hardwood floodplain, deadwood decay, Mura-Drava-Danube transboundary biosphere, reserve, riparian area, softwood floodplain, UNESCO biosphere reserve, wetlands Objavljeno v DiRROS: 18.07.2022; Ogledov: 465; Prenosov: 377 Celotno besedilo (1,55 MB) Gradivo ima več datotek! Več... |
82. Poročilo o preskusu št.: LVG 2022-049 : vzorec št. 2022/00130 : namen testiranja: sum na: Fusarium circinatumMaarten De Groot, Zina Devetak, Špela Jagodic, Barbara Piškur, 2022, izvedensko mnenje, arbitražna odločba Ključne besede: varstvo gozdov, morfološke analize, bor, borov smolasti rak, Fusarium circinatum Objavljeno v DiRROS: 30.06.2022; Ogledov: 421; Prenosov: 0 |
83. Poročilo o preskusu št.: LVG 2022-021 : vzorec št. 2022/00024 : namen testiranja: sum na: Fusarium circinatumNikica Ogris, Maša Zagorac, Špela Jagodic, Andreja Kavčič, Maarten De Groot, Barbara Piškur, 2022, izvedensko mnenje, arbitražna odločba Ključne besede: varstvo gozdov, morfološke analize, bor, borov smolasti rak, Fusarium circinatum, program preiskav, Tomicus piniperda Objavljeno v DiRROS: 11.05.2022; Ogledov: 504; Prenosov: 0 |
84. Verjetnostna in količinska napoved sanitarnega poseka smreke zaradi podlubnikov v Sloveniji v 2022Nikica Ogris, Maarten De Groot, 2022, kratki znanstveni prispevek Ključne besede: gozdovi, varstvo gozdov, navadna smreka, Picea abies, sanitarni posek, napoved, prognoza, ogroženost, model, smrekovi podlubniki, Ips typographus, Pityogenes chalcographus Objavljeno v DiRROS: 13.04.2022; Ogledov: 524; Prenosov: 346 Celotno besedilo (758,71 KB) Gradivo ima več datotek! Več... |
85. 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: 618; Prenosov: 216 Celotno besedilo (1,12 MB) |
86. Worldwide diversity of endophytic fungi and insects associated with dormant tree twigsIva Franić, Simone Prospero, Kalev Adamson, Eric Allan, Fabio Attorre, Marie-Anne Auger-Rozenberg, Sylvie Augustin, Dimitrios N. Avtzis, Wim Baert, Marek Barta, Maarten De Groot, Barbara Piškur, 2022, izvirni znanstveni članek Povzetek: International trade in plants and climate change are two of the main factors causing damaging tree pests (i.e. fungi and insects) to spread into new areas. To mitigate these risks, a large-scale assessment of tree-associated fungi and insects is needed. We present records of endophytic fungi and insects in twigs of 17 angiosperm and gymnosperm genera, from 51 locations in 32 countries worldwide. Endophytic fungi were characterized by high-throughput sequencing of 352 samples from 145 tree species in 28 countries. Insects were reared from 227 samples of 109 tree species in 18 countries and sorted into taxonomic orders and feeding guilds. Herbivorous insects were grouped into morphospecies and were identified using molecular and morphological approaches. This dataset reveals the diversity of tree-associated taxa, as it contains 12,721 fungal Amplicon Sequence Variants and 208 herbivorous insect morphospecies, sampled across broad geographic and climatic gradients and for many tree species. This dataset will facilitate applied and fundamental studies on the distribution of fungal endophytes and insects in trees. Ključne besede: diversity, endophytic fungi, endophytic insects, tree twigs Objavljeno v DiRROS: 01.03.2022; Ogledov: 695; Prenosov: 574 Celotno besedilo (1,32 MB) Gradivo ima več datotek! Več... |
87. 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: 622; Prenosov: 507 Celotno besedilo (1,24 MB) Gradivo ima več datotek! Več... |
88. Biotic threats for 23 major non-native tree species in EuropeElisabeth Pötzelsberger, Martin M. Gossner, Ludwig Beenken, Anna Gazda, Michal Petr, Tiina Ylioja, Nicola La Porta, Dimitrios N. Avtzis, Elodie Bay, Maarten De Groot, Kristjan Jarni, Nikica Ogris, Marjana Westergren, 2021, izvirni znanstveni članek Povzetek: For non-native tree species with an origin outside of Europe a detailed compilation of enemy species including the severity of their attack is lacking up to now. We collected information on native and non-native species attacking non-native trees, i.e. type, extent and time of first observation of damage for 23 important non-native trees in 27 European countries. Our database includes about 2300 synthesised attack records (synthesised per biotic threat, tree and country) from over 800 species. Insects (49%) and fungi (45%) are the main observed biotic threats, but also arachnids, bacteria including phytoplasmas, mammals, nematodes, plants and viruses have been recorded. This information will be valuable to identify patterns and drivers of attacks, and trees with a lower current health risk to be considered for planting. In addition, our database will provide a baseline to which future impacts on non-native tree species could be compared with and thus will allow to analyse temporal trends of impacts. Objavljeno v DiRROS: 21.02.2022; Ogledov: 600; Prenosov: 666 Celotno besedilo (1,60 MB) Gradivo ima več datotek! Več... |
89. 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: 718; Prenosov: 569 Celotno besedilo (1,42 MB) Gradivo ima več datotek! Več... |
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