Rozprzestrzenianie się zarośli drzewiastych w piętrze połonin Bieszczad Zachodnich

• Autorzy: Durak T. , Zywiec M. , Ortyl B.

Warianty tytułu

EN

Expansion of brushwood in the subalpine zone of the Western Bieszczady Mts.

• Języki publikacji: PL

Abstrakty

EN

Complete discontinuation of agricultural use of subalpine meadows in the Western Bieszczady, which dates back to 1940s, started the process of their overgrowing with brushwood. Based on available cartographic material the following features were analysed: changes in the area occupied by brushwood on Mała Rawka and Wielka Rawka subalpine meadows, their growth rate and the relationship between the overgrowth process and the previous manner of agricultural use as well as topographic conditions throughout last 30 years. In that period the brushwood on Mała Rawka meadow (in the past the area had been reaped) was characterised by a small initial area (in the 1980s), a significant growth rate of the area and its relation to the slopes exposed to N, NE and E, the zone adjacent to the timber line and steeper slopes. In 1980 on Wielka Rawka meadow (previously used as a pasture) a high share of brushwood was found (about 25% of the meadow area), whose distribution was related only to the slopes of N, NE and E exposure. In subsequent years the growth rate was low. The results indicate a progressing process of overgrowing of subalpine meadows by brushwood. The brushwood expansion is related to discontinuation of agricultural use of the meadows and its course depends on the earlier regime of cultivation. The pattern of brushwood distribution also depends on altitude, exposure and the grade of slopes. Those relations result from the expansion of the rowan tree, dominating in the brushwood, also climatic conditions and accessibility of the ground.

Słowa kluczowe

PL

Bieszczady Zachodnie; rzeka Mala Rawka; Wielka Rawka; poloniny; zarosla; drzewa; jarzab pospolity; Sorbus aucuparia; olsza zielona; Alnus viridis; rozprzestrzenianie sie roslin

• Wydawca: -
• Czasopismo: Sylwan
• Rocznik: 2013
• Tom: 157
• Numer: 02
• Opis fizyczny: s.130-138,rys.,bibliogr.

Twórcy

autor

Durak T.

• Zakład Botaniki, Uniwersytet Rzeszowski, ul.Zelwerowicza 4, 35-601 Rzeszów

autor

Zywiec M.

• Instytut Botaniki, Polska Akademia Nauk, ul.Lubicz 46, 31-512 Kraków

autor

Ortyl B.

• Katedra Agrobiologii i Ochrony Środowiska, Uniwersytet Rzeszowski, ul.Zelwerowicza 4, 35-601 Rzeszów

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