Carbohydrate reserve changes in below-ground biomass of subalpine grasslands as a result of different snow conditions (Hruby Jesenik Mts., Czech Republic)

• Autorzy: Zeidler M. , Banas M. , Duchoslav M.
• Języki publikacji: EN

Abstrakty

EN

Carbohydrate concentration changes in below-ground biomass of subalpine tall grasslands with Calamagrostis villosa (Chaix) J.F. Gmelin were monitored during one year on the slope of Petrovy kameny Mt. (Hruby Jesenik Mts., Czech Republic). Stands of the community with natural snow conditions were compared with stands on a ski piste. Soil temperature development and snow melting times were also observed in the territory concerned. The difference was stated between mean annual temperature on control stands (4.21 [degree] C) and ski piste (3.95 [degree] C) in the upper 5 cm of soil. At the average, snow melted on the ski piste two weeks later than that on the natural stands. The natural stands and the stands on the ski piste differ significantly from each other in terms of development of carbohydrate accumulation in the below-ground biomass. Consumption of reserve carbohydrates by the plants at both the ski piste and in the natural stands was nearly similar during the winter. At the beginning of the growing season (July), significant difference in carbohydrate concentration in below-ground organs between stands on the ski piste and natural stands was observed. It was caused by late melting of the snow cover and subsequent delay of the phenologic development and assimilation of the vegetation in the ski piste. Later in season (August, October), the differences in carbohydrate concentration between stands at the ski piste and natural stands disappeared. The mean annual amount of carbohydrates in the upper (0-5 cm) and lower (5-10 cm) soil horizons in natural stands and ski piste stands do not differ fundamentally, except for the significant difference in July. The results obtained are discussed in view of abiotic environmental conditions, the plant physiology and strategy of the dominant species.

Słowa kluczowe

EN

below-ground; carbohydrate reserves; ski piste; snow; subalpine grassland

PL

nartostrada; pod powierzchnią gleby; śnieg; subalpejskie użytki zielone; zasoby węglowodanów

• Wydawca: Museum and Institute of Zoology, Polish Academy of Sciences
• Czasopismo: Polish Journal of Ecology
• Rocznik: 2008
• Tom: Vol. 56, nr 1
• Strony: 75--83
• Opis fizyczny: Bibliogr. 46 poz.,Rys., wykr.,

Twórcy

autor

Zeidler M.

autor

Banas M.

autor

Duchoslav M.

• Palacky University Olomouc, Faculty of Natural Sciences, Department of Ecology and Environmental Sciences, Trida Svobody 26, Olomouc 77146, Czech Republic,

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