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2008 | 56 | 1 |

Tytuł artykułu

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

Warianty tytułu

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 (4.21oC) and ski piste (3.95oC) 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 (0–5cm) 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.

Wydawca

-

Rocznik

Tom

56

Numer

1

Opis fizyczny

p.75-83,fig.,ref.

Twórcy

autor
  • Palacky University, Tr.Svobody 26, CZ-771 46 Olomouc, Czech Republic
autor
autor

Bibliografia

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Typ dokumentu

Bibliografia

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