SELECTED CHARACTERISTICS OF CLIMATE IN BEECH ECOSYSTEMS

Bublinec E., Luptáková D., Kúdelová D., Macko J.: Selected characteristics of climate in beech ecosystems. Ekológia (Bratislava), Vol. 30, No. 3, p. 282-287, 2011. Beech ecosystems (ecosystems with presence of beech) represent 85.3% of the forest fund area in Slovakia. In this contribution we provide selected, up to now not very well recognised, climatic characteristics of beech communities in the Western Carpathians Mts. The research ran on an altitudinal transect covering 350-99Om a.s.l. in groups of forest types (forest type groups) Fageto-Quercetum (FQ), Quereceto-Fagetum (QF), Fagetum pauper (Fp), Fagetum typicum (Ft), Abieto-Fagetum (AF), Fraxineto-Aceretum (FrA). It has been found that the amount of solar radiation (light) reaching the forest ground in Fp group in dormancy period was 40-45% from the total amount reaching open plot under clear sky, in the growing season the range was reduced to 1.5 do 2.5%. The value of 1.5% is the lowest value observed in forest ecosystems with beech presence. In another group of beech forest vegetation tier Ft, illumination under complete foliage ranged from 2 to 4%. In this vegetation tiers is forest soil reached by the highest snowfall percentage from the total - which reveals an immense importance of beech forest stands for water management. Snow cover before frost occurrence in localities situated at above 600 m a.s.l. prevents the soil from freezing: the maximum freezing depth is 5 cm. Key words: beech ecosystems, solar radiation/light supply, snow cover, soil freezing.

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