Ecological interpretation of climate change according to Churáňov station (NP Šumava, Czech Republic) during 60 years

Karel Matějka, Roman Modlinger


Analysis of long-time climate data since 1961 from the selected meteorological station Churáňov was connected with state of Norway spruce forests in the area of spruce natural occurrence and their main pest species, Ips typographus, in the Šumava Mts. The current climate change was described using set of variables based on air temperature, relative air humidity and precipitations. Data were used for calculation specific indices, which are related to dynamics of Picea abies (growth index) and spruce bark beetle (date of first infestation and achieved bark beetle development [G], have been calculated by the PHENIPS model). Average air temperature increase was +0.37 °C per 10 years. Slight air humidity decrease shows a discontinuity between 1994 and 1995. Total volume of precipitation is rather constant. Increase of temperatures results in earlier onset of both vegetation growth and I. typographus first infestation (average shift of 1.5 days per 10 years). The modelled bark beetle's first infestation corresponds to numbers of individuals caught in the pheromone traps. The number of generations and the achieved development state of I. typographus was stable until 1991, from 1992 there was an increase, which was followed by past growing trend. The results from the Churáňov in mountain region of natural Norway spruce forests are compared with ones from whole area of the Czech Republic, where planted P. abies forests prevails.

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© Karel Matějka - IDS (2023)