DIGITALNA ARHIVA ŠUMARSKOG LISTA
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ŠUMARSKI LIST 1-2/1966 str. 79 <-- 79 --> PDF |
(1), 5072 ha in area in which the following tree species deserve a special montion: Pinus silvestris, Picea abies, Quercus robur, Alnus glutinosa, Fraxinus excelsior, Tilia cordata, Betula verrucosa, B. pubescens and Quercus petraea, where it reaches its eastern limit. The populations of different tree species in this park represent the fullest available gene pools from the region of the Podlaskie Forests. Surrounding the Bialowieza National Parks there are large natural forest areas which act as a barrier isolating the park from contamination by foreign genes, and thereby preventing the deterioration of the genetic quality of these populations. 2. NATIONAL PARKS WHICH ARE PARTIALLY PROTECTED. In these parks protection depends on the maintainance of original relations within plant associations, and of the indigenous tree populations in order to obtain a harmony between the forest and the site. M Fig. 1. Distribution of National Parks and nature reserves with forest stands. |