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Research project (§ 26 & § 27)
Duration : 2021-11-01 - 2023-10-31

Due to climate change with its extreme weather conditions, the roundwood supply chain is increasingly exposed to damage events. Accompanying sales problems in the domestic and international forestry industry affect the management of these additional, unscheduled roundwood volumes. Already harvested timber must then be temporarily stored on site or/and treated to prevent or control bark beetle infestation. However, interim storage away from the customer requires appropriate precautions to ensure timber quality during storage, which can be degraded by insect infestation, fungal infection, and abiotic factors. Debarking is an effective and long-established measure against bark beetle infestation. In steep terrain, the respective assortments could be debarked at the forest roadside during the harvesting operation. Debarked assortments have the advantage that, from a phytosanitary point of view, the propagation of bark beetles in the forest can be prevented. At the same time, debarking in the larval and pupal stages has a decimating effect on the population density of the insects and thus has a controlling effect. With regard to the quality of the stored assortments, debarking also counteracts the possibility of breeding and development of longhorn beetles and thus prevents a technical reduction in quality. In addition, the possibility of blue stain fungi and other bark- and wood-breeding insects being introduced is reduced in debarked saw logs. Therefore, the aim of this research project is to build on the previous project "DEBARK" and to analyze and evaluate the potential of debarking also in steep terrain timber harvesting. The focus will be on the effects of debarking on timber harvesting, the propagation potential of bark beetles and longhorn beetles, and the blue stain of the assortments. As a result, the knowledge gained will be prepared for the responsible decision-makers in day-to-day business.
Research project (§ 26 & § 27)
Duration : 2021-10-01 - 2024-09-30

Die Gemeine Esche (Fraxinus excelsior), die zusammen mit der Eiche die zweithäufigste Laubbaumart im österreichischen Ertragswald ist, ist durch das Eschentriebsterben, einer schwerwiegenden neuartigen Baumkrankheit, die von dem invasiven, nicht-heimischen Schlauchpilz Hymenoscyphus fraxineus hervorgerufen wird, stark gefährdet. Der Krankheitserreger ist in Ost-Asien heimisch, wurde auf unbekannte Weise um 1990 nach Europa eingeschleppt und hat sich in den letzten drei Jahrzehnten sukzessive zu einem schwerwiegendem Forstschutzproblem der Gemeinen Esche und anderer Eschenarten entwickelt.
Research project (§ 26 & § 27)
Duration : 2021-09-15 - 2023-09-14

Our previous investigations indicate substantial regional differences regarding recent (past 30 years) changes of soil organic carbon status of Lower Austrian agricultural soils. While for some regions we could already show substantial increases of soil organic carbon in cultivated and grassland soils, virtually no information is available for the central lowlands and the Bohemian massif of Lower Austria. This project aims at re-collecting topsoils from 300 sites that had been sampled in 1990/91 for the Lower Austrian soil inventory. The re-sampled soil will be analysed for organic carbon along with archived samples from the same location available from the initial sampling campaign. The data will be explored for changes of teh status of organic carbon and discussed in the context of soil health and climate change mitigation potentials.

Supervised Theses and Dissertations