711. Reconstruction of rockfall activity through dendrogeomorphology and a scar-counting approach : a study in a beech forest stand in the Trenta valley (Slovenian Alps)Barbara Žabota, Daniel Trappmann, Tom Levanič, Milan Kobal, 2020, original scientific article Abstract: Trees represent an important archive that can be used to reconstruct the spatial and temporal patterns of rockfall events. Rockfall impacts can be recorded in the form of anomalies in tree rings and impact scars on the tree stem. In this paper we demonstrate the use of an approach based on counting scars for reconstructing the frequency and spatial pattern of past rockfalls. The approach was applied by counting the visible scars on the stem surface of 52 European beech trees (Fagus sylvatica L.) in the area of the Trenta Valley, Slovenia. The average number of impacts per trees was 7, and the impacts were mostly classified as old, indicating reduced rockfall activity in recent years. The average recurrence interval was 31.8 years, which was reduced by 1.2 years by the application of the conditional impact probability. The spatial pattern of rockfall impacts shows that rockfall activity is higher in the middle part of the studied slope.
Keywords: rockfall, natural hazards, dendrogeomorphology, tree rings, stem scars, recurrence interval
Published in DiRROS: 01.04.2020; Views: 4009; Downloads: 3015
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712. The influence of abiotic and biotic disturbances on the protective effect of alpine forests against avalanches and rockfallsDomen Oven, Barbara Žabota, Milan Kobal, 2020, review article Abstract: Abiotic and biotic disturbances in alpine forests can reduce forest cover or change the structure of the forest and consequently reduce the protective effect of forest against natural hazards such as avalanches and rockfalls. In this review article, the effect of the main abiotic (forest fire, windthrow, ice break, snow break, avalanche and rockfall) and biotic (insects and pathogens) disturbances in protection forests are presented along with their potential influence on the protective effect of forest against avalanches and rockfalls. In general, natural disturbances negatively affect the protective effect of forest, especially in the case of large-scale and severe events, which in alpine areas are mostly caused by storms, bark beetle outbreaks, avalanches and forest fires. Climate change induced interactions between disturbances are expected to present challenges in the management of protection forests in the future.
Keywords: natural disturbances, natural hazards, abiotic disturbances, biotic disturbances, protection forests, protective effect, stand parameters, rockfall, avalanche
Published in DiRROS: 01.04.2020; Views: 4274; Downloads: 3275
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714. Poročilo o preskusu št.: LVG 2020-006 : opis vzorca: 11179245: Pinus sylvestris, veja (z listi ali brez) ali poganjki, 11179924: Pinus nigra, veja (z listi ali brez) ali poganjki : namen testiranja: 11179245: sum na: Fusarium circinatum, 11179924: sum na: Fusarium circinatumNikica Ogris, Barbara Piškur, Zina Devetak, Špela Jagodic, 2020, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize
Published in DiRROS: 19.03.2020; Views: 1265; Downloads: 231
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716. Poročilo o preskusu št.: LVG 2020-003 : opis vzorca: Pinus nigra, veja (z listi ali brez) ali poganjki : namen testiranja: sum na: Fusarium circinatumNikica Ogris, Zina Devetak, Špela Jagodic, Barbara Piškur, 2020, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, črni bor, Pinus nigra, borov smolasti rak, Fusarium circinatum, sušica najmlajših borovih poganjkov, Diplodia pinea
Published in DiRROS: 18.03.2020; Views: 1550; Downloads: 295
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717. The interplay between forest management practices, genetic monitoring, and other long-term monitoring systemsDarius Kavaliauskas, Barbara Fussi, Marjana Westergren, Filipos Aravanopoulos, Domen Finžgar, Roland Baier, Paraskevi Alizoti, Gregor Božič, Evangelia V. Avramidou, Monika Konnert, Hojka Kraigher, 2018, review article Abstract: The conservation and sustainable use of forests and forest genetic resources (FGR) is a challenging task for scientists and foresters. Forest management practices can affect diversity on various levels: genetic, species, and ecosystem. Understanding past natural disturbance dynamics and their level of dependence on human disturbances and management practices is essential for the conservation and management of FGR, especially in the light of climate change. In this review, forest management practices and their impact on genetic composition are reviewed, synthesized, and interpreted in the light of existing national and international forest monitoring schemes and concepts from various European projects. There is a clear need and mandate for forest genetic monitoring (FGM), while the requirements thereof lack complementarity with existing forest monitoring. Due to certain obstacles (e.g., the lack of unified FGM implementation procedures across the countries, high implementation costs, large number of indicators and verifiers for FGM proposed in the past), merging FGM with existing forest monitoring is complicated. Nevertheless, FGM is of paramount importance for forestry and the natural environment in the future, regardless of the presence or existence of other monitoring systems, as it provides information no other monitoring system can yield. FGM can provide information related to adaptive and neutral genetic diversity changes over time, on a species and/or on a population basis and can serve as an early warning system for the detection of potentially harmful changes of forest adaptability. In addition, FGM offers knowledge on the adaptive potential of forests under the changing environment, which is important for the long-term conservation of FGR
Keywords: forest monitoring, forest genetic monitoring, forest genetic diversity, silviculture
Published in DiRROS: 20.02.2020; Views: 2085; Downloads: 1305
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718. Poročilo o preskusu št.: LVG 2019-222 : opis vzorca: Acer pseudoplatanus, les, lubje, sekanci : namen testiranja: sum na: gliva, bakterijaBarbara Piškur, Nikica Ogris, Ana Brglez, Špela Jagodic, Zina Devetak, Peter Smolnikar, 2019, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, gorski javor, Acer pseudoplatanus, gliva, bolezen, Verticillium dahliae, verticilijska uvelost listavcev, Fusarium sambucinum, Eutypa maura, Peroneutypa scoparia
Published in DiRROS: 31.01.2020; Views: 1700; Downloads: 82 |
719. Poročilo o programu preiskave Fusarium circinatum (ex. Gibberella circinata) za leto 2019Nikica Ogris, Barbara Piškur, 2019, treatise, preliminary study, study Keywords: varstvo gozdov, morfološke analize, borov smolasti rak, Fusarium circinatum, Gibberella circinata, bor, Pinus, duglazija, Pseudotsuga menziesii, kontrola pasti, vektorji
Published in DiRROS: 31.01.2020; Views: 1814; Downloads: 40 |
720. Poročilo o preskusu št.: LVG 2019-221 : opis vzorca: LVG2019/00170: Acer pseudoplatanus, veja (z listi ali brez) ali poganjki, LVG2019/00734: Acer pseudoplatanus, les, lubje, sekanci : namen testiranja: sum na: GlivaNikica Ogris, Barbara Piškur, Špela Jagodic, Zina Devetak, Ana Brglez, Peter Smolnikar, 2019, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, gorski javor, Acer pseudoplatanus, Prosthecium platanoidis, Eutypa sp., glive, Xylaria longipes, Fusarium sp., kompleksna bolezen, suša, sušni stres, podnebne spremembe
Published in DiRROS: 31.01.2020; Views: 1796; Downloads: 82 |
