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Povzetek: V članku so predstavljeni rezultati digitalizacije površin borovih sestojev v južnem delu gospodarskega območja (GGO) Tolmin iz leta 1963 in primerjava stanja omenjenih gozdnih sestojev leta 1963 in dandanes. Podatki o stanju sestojev so razdeljeni v tri kategorije. Borovi sestoji, starejši od 60 let (nastali pred letom 1963), nekdanji borovi sestoji, kjer je že bila narejena premena, in mlajši borovi sestoji (do 60 let). Na splošno se je površina borovih sestojev v tem obdobju od leta 1963 do zdaj zmanjšala. Starost sestojev kaže, da je večina že dosegla sečno zrelost. Bori so marsikje opravili svoje poslanstvo predkulture. V mladju se pojavljajo toploljubni listavci. Zato so mnogi sestoji že primerni za posek (premeno), saj se njihova vitalnost in kakovost zmanjšujeta. Prav tako so požarno ogroženi.
Ključne besede: borovi sestoji, premena, toploljubni listavci, pomlajevanje, starostna struktura
Objavljeno v DiRROS: 14.11.2023; Ogledov: 395; Prenosov: 152
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Ključne besede: anatomija lesa, značilnosti lesa, drevesne vrste
Objavljeno v DiRROS: 14.11.2023; Ogledov: 418; Prenosov: 129
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Povzetek: There has been accumulating evidence for effects of tree species composition on herbivory with many examples of lower damage by specialist feeders in tree species rich forests. In a joint study in five Central and Southeastern European countries, we studied the effect of tree species richness on infestation intensity of the oak lace bug, Corythucha arcuata (Say) (Heteroptera, Tingidae), an invasive pest on oak trees that has spread rapidly across the Balkan Peninsula and Central Europe. Intensity of infestation by C. arcuata on oaks was assessed on three or four study plots with high (pure stands) and three or four plots with low percentage of oak (mixed stands) in each country. Ordinal regression analysis showed that intensity of infestation of trees by C. arcuata differed between countries; no significant effect of stand type (mixed or pure) on infestation levels was detected. When analysing the percentage of trees in the highest infestation class, stand type had a significant effect with more intensive infestation in pure stands. We conclude that mixed stands will not prevent severe infestation but may help mitigating the impact of established C. arcuata populations.
Ključne besede: associational resistance, Corythucha arcuata, diversity, host tree concentration, invasive forest pest
Objavljeno v DiRROS: 14.11.2023; Ogledov: 396; Prenosov: 242
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Povzetek: A well-defined terminology of fire-related variables is important for correct analyses and supporting knowledge-based decisions regarding the evaluation of building fires at the European level. After developing an overview of current practices for fire statistics in Part I, the terminology used and the data collected by the EU Member States and eight other countries regarding fire incidents, property damage and human losses were mapped to increase awareness of their practice and support a comprehensive assessment of several fire statistical datasets. A questionnaire was distributed to relevant authorities responsible for the collection, elaboration/analysis, and fire statistical data publications to define and select the essential variables for an appropriate fire assessment and fire incident description. Based on the results of the questionnaire able to identify the essential fire statistical variables and a detailed analysis of current definitions adopted in the fire statistics of the EU Member States and other countries, a common terminology is proposed to collect the necessary data in the EU Member States and obtain meaningful datasets based on standardised terms and definitions. The results will generate essential outputs to move towards harmonised fire statistics at the EU level and contribute to an appropriate analysis able to improve fire prevention and fire mitigation in building fires.
Ključne besede: fire statistics, fire incidents, building fires, fire statistical variables, terminology
Objavljeno v DiRROS: 13.11.2023; Ogledov: 390; Prenosov: 189
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Povzetek: The analysis of the current state of fire statistics and data collection in Europe and other countries is needed to increase awareness of how fire incidents affect buildings and to support pan-European fire prevention and fire mitigation mea- sures. The terminology and data collected regarding fire incidents in buildings in the EU Member States were mapped to obtain meaningful datasets to determine common terminology, collection methodology, and data interpretation system. An extensive literature review showed that fire data collection systems have been instrumental in informing firefighting strategies, evidence-based planning, prevention, and educational programmes. Differences and similarities between fire data collection systems were also investigated. The amount and quality of the information in fire statistical recording systems appear to be influenced by the complexity and structure with which the data are collected. The analysis also examined the existing fire statistics in the EU Member States and a few other countries. Finally, a detailed investigation of the number of fires, fire deaths, and injuries from 2009 to 2018 in several countries was examined based on data from a report by CTIF. The trends showed differences attributable to the existing fire statistical practices in terms of terminology and data collection, and interpretation. Part II proposes a common terminology for selected fire statistical variables. The results provide relevant information regarding fire safety at the European level and should be used to guide the development of more uniform fire statistics across Europe.
Ključne besede: fire statistics, fire incidents, fire statistical variable, terminology, data collection, data interpretation
Objavljeno v DiRROS: 13.11.2023; Ogledov: 488; Prenosov: 158
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