tailieunhanh - Báo cáo lâm nghiệp: "The proposal of biotic hazard zones in selected spruce dominated regions in Slovakia"

Tuyển tập những bài báo cáo nghiên cứu khoa học hay nhất được đăng trên tạp chí JOURNAL OF FOREST SCIENCE đề tài: The proposal of biotic hazard zones in selected spruce dominated regions in Slovakia. | JOURNAL OF FOREST SCIENCE 56 2010 5 236-242 The proposal of biotic hazard zones in selected spruce dominated regions in Slovakia T. Hlásny1 2 L. Kulla1 2 I. Barka1 M. Turcáni2 Z. Sitková1 2 M. Koren3 1National Forest Centre - Forest Research Institute in Zvolen Zvolen Slovakia Faculty of Forestry and Wood Sciences Czech University of Life Sciences Prague Prague Czech Republic 3Faculty of Forestry Technical University Zvolen Zvolen Slovakia ABSTRACT Biotic agents driven spruce decline has been observed over several regions in Europe. We studied the spatial pattern of spruce stands mortality due to biotic agents in three spruce dominated regions in Slovakia - the Kysuce Orava and Low Tatras regions. Regularly reported data on sanitary felling were used for the analysis. Geostatistical techniques and other spatial modelling tools were used to design the zones of biotic hazard for each region. Zone A stands for the totally disintegrated stands with extremely elevated activity of biotic agents. Zone B represents the buffer zone around the zone A. Its width depends on the spreading potential of biotic agents and related stand mortality observed during the last years. Zone C stands for the background areas with more or less healthy stands. Zone-specific forest protection measures are proposed. Such a system allows for the priority rating of unnatural spruce stand conversion and optimal allocation of forest protection measures. Keywords bark beetle biotic hazard zones fungal pathogens Slovakia spruce decline Declining spruce stands are distributed over the spacious areas in Central Europe. Biotic agents driven decline occurs in Slovakia prevailingly at the lower limit of spruce distribution 400-800 m . such as the Beskydy Mts. Destructive wind-driven decline is typical of the mountainous regions in the central part of Outer and in the northern part of Inner Western Carpathians. Bark beetle Ips typographus mainly and fungal pathogens Armi-llaria mainly are the most .