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Dendroflora wybranych parków miejskich w Bielsku-Białej

Pietraszko Ewa, Żarnowiec Jan, Klama Henry, Adamaszek Marcin, Kozak Maciej, Kóska Monika, Owczarz Sebastian, Sawa Magdalena

Polish Journal of Materials and Environmental Engineering

2023

Vol. 6 (26)

13--24

Parks are undoubtedly areas of great natural value to the city, mainly due to the ecosystem services and ecological functions they provide. An important component of every park is its forest stand. In this paper, the study of dendroflora were conducted in seven parks of Bielsko-Biała. The parks were created in the 19th century. They are located mainly in the central part of the city. This paper presents the results of the study on the species composition as well as the quantity of each species in the parks. Furthermore, basic dendrometric characters such as tree height and circumference at the breast height were also analyzed. A total of 615 trees belonging to 32 species from 21 genus and 12 families were found in parks. There was a dominance of deciduous trees (28 species) over conifers (5). The largest number of examined trees was in Strzegowski Park, and the smallest in Park at Komorowicka Street. In turn, the largest number of species was in Słowacki Park, and the smallest in the Park near to Zipser villa. In addition, the presence of 144 specimens with monumental dimensions was indicated. Most of the park trees had dimensions in the range of 200–300 cm in terms of cir-cumference at the breast height and height in the interval 20–30 m. Typical trees that occur in the natural forest communities of Poland were noted in the parks. These include: oaks, beeches, ash trees, hornbeams, alders, maples or lindens. Some of them are often selected for planting in parks and avenues. Of the 32 tree species, 10 were most numerous: Tilia cor-data, T. platyphyllos, Acer platanoides, A. pseudoplatanus, A. saccharinum, Fraxinus excel-sior, Alnus glutinosa, Carpinus betulus, Aesculus hippocastanum and Quercus robur. Among examined species, alien invasive species (Robinia pseudoacacia and Quercus rubra) were noted. They are classified as medium invasive plants. In this paper the authors pointed out the parameters that can affect the number of trees in-cluded in the study, for example: minimum circumference at the breast height, park area, age of the forest stand and local condition. Therefore, further research regarding the dendroflora in parks of Bielsko-Biała should be expanded with additional analyses, especially to determi-nate full species composition and changes in the stand.

What Can We Learn from Monitoring of Monumental Trees – A Case Study of the Jasienica and Jaworze Communes (Silesia, South Poland)

Pietraszko Ewa, Żarnowiec Jan, Szafran Sylwia, Zalot Tomasz, Dziergas Grzegorz, Jarosz Przemysław

Journal of Ecological Engineering

2022

Vol. 23, nr 6

129--138

The data of monitoring of natural monuments in the Jasienica and Jaworze communes (Silesian Voivodeship) deriving from 1999, 2008 and 2019 were compared between the periods and communes. The conducted studies involved determining metric data (including tree height and diameter at breast height – DBH) and assessing health condition of monumental trees. A total of 65 trees were included in the research from 2019, dominated by Quercus robur (28 specimens) and Tilia cordata (9). The health condition of trees was the result of the damage that occurred. Monumental trees in the Jasienica commune were characterized by average (60%) or poor (40%) health condition. In the Jaworze commune, merely 14% of trees have poor state of health. The remaining trees were in average (38%), satisfactory (26%) and good (22%) health condition.