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EN
During the field studies on the floodplain forests of the Małopolska Upland carried out in 2009–2013, the author tried to determine which species of alien and invasive plants could be a threat to the stability of these vegetation communities. Efforts were also made to answer the question, which floodplain forests are particularly vulnerable to the penetration of alien species and in which layers of the forest plant community are the best conditions for the development of the individual alien plant species. During the research, a total number of 344 reléves were made, of which 90 recorded the presence of alien species. The most common were: Impatiens parviflora, Acer negundo and Padus serotina. The highest percentage of reléves involving alien species was found in the riverside floodplain forests of Salicetum albo-fragilis and Populetum albae.
EN
The forest sites and soil survey conducted by the Bureau for Forest Management and Geodesy, Branch in Lublin in the years 2009–2010 involved all of the Roztocze National Park (RNP). The studied area was 8335.31 ha. Throughout the Park, 417 soil sampling plots (open pits) and 2,400 auxiliary soil sampling plots (soil boreholes) were established. A total of 28 soil subtypes, subsumed under 14 soil types, were identified, with the most abundant soil type being rendzina. Furthermore, 17 forest site types were described, including 12 lowland and 5 upland forest site types. Two upland forest types (upland broadleaved forest and upland mixed broadleaved forest), were found to be predominant in the National Park.
PL
Prace glebowo-siedliskowe wykonane przez Biuro Urządzania Lasu i Geodezji Leśnej Oddział w Lublinie w latach 2009–2010 objęły swym zasięgiem cały obszar RPN. Powierzchnia na której dokonano rozpoznania gleb i siedlisk leśnych wyniosła 8335,31 ha. Na terenie Parku założono 417 powierzchni typologicznych - odkrywek glebowych oraz 2400 powierzchni pomocniczych – wierceń glebowych. Ogółem wyróżniono 28 podtypów gleb, ujętych w 14 jednostkach nadrzędnych – typach gleb. Największą grupą gleb pod względem zajmowanej  powierzchni są rędziny. Opisano także 17 typów siedliskowych lasu, wśród których znajduje się 12 typów siedlisk nizinnych oraz 5 typów siedlisk wyżynnych. Biorąc pod uwagę udziały procentowe powierzchni poszczególnych typów siedliskowych lasu, można zaobserwować zdecydowaną dominację siedlisk wyżynnych: lasu wyżynnego oraz lasu mieszanego wyżynnego.
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